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When a user connects a DS4 twice using USB and BT, we reject the
second device connection after the setup work. We then perform
a cleanup, but during cleanup we are not removing the touchpad
device. This leads to leakage of an input device, which we would
never remove. It can likely result into a kernel oops as well
when the touchpad evdev node is accessed and the underlaying HID
device has been removed from the system.
[jkosina@suse.cz: added stable annotation]
Fixes: ac797b95f532 ("HID: sony: Make the DS4 touchpad a separate device")
Cc: stable@vger.kernel.org
Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add support for media keys on the keyboard that comes with the
Asus V221ID and ZN241IC All In One computers.
The keys to support here are WLAN, BRIGHTNESSDOWN and BRIGHTNESSUP.
This device is not visibly branded as Chicony, and the USB Vendor ID
suggests that it is a JESS device. However this seems like the right place
to put it: the usage codes are identical to the currently supported
devices, and this driver already supports the ASUS AIO keyboard AK1D.
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Commit 279967a65b32 ("HID: rmi: Handle all Synaptics touchpads using hid-rmi")
unconditionally switches over handling of all Synaptics touchpads to hid-rmi
(to make use of extended features of the HW); in case CONFIG_HID_RMI is
disabled though this renders the touchpad unusable, as the
HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID)
match doesn't exist and generic/multitouch doesn't bind to it either (due
to hid group mismatch).
Fix this by switching over to hid-rmi only if it has been actually built.
Fixes: 279967a65b32 ("HID: rmi: Handle all Synaptics touchpads using hid-rmi")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Stupid bug that wrecked the alignment of task_struct and causes WARN()s
in the x86 FPU code on some platforms.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: e274795ea7b7 ("locking/mutex: Fix mutex handoff")
Link: http://lkml.kernel.org/r/20170218142645.GH6500@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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What happens is that a write to /dev/sg is given a request with non-zero
->iovec_count combined with zero ->dxfer_len. Or with ->dxferp pointing
to an array full of empty iovecs.
Having write permission to /dev/sg shouldn't be equivalent to the
ability to trigger BUG_ON() while holding spinlocks...
Found by Dmitry Vyukov and syzkaller.
[ The BUG_ON() got changed to a WARN_ON_ONCE(), but this fixes the
underlying issue. - Linus ]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Don't crash the machine just because of an empty transfer. Use WARN_ON()
combined with returning an error.
Found by Dmitry Vyukov and syzkaller.
[ Changed to "WARN_ON_ONCE()". Al has a patch that should fix the root
cause, but a BUG_ON() is not acceptable in any case, and a WARN_ON()
might still be a cause of excessive log spamming.
NOTE! If this warning ever triggers, we may end up leaking resources,
since this doesn't bother to try to clean the command up. So this
WARN_ON_ONCE() triggering does imply real problems. But BUG_ON() is
much worse.
People really need to stop using BUG_ON() for "this shouldn't ever
happen". It makes pretty much any bug worse. - Linus ]
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: James Bottomley <jejb@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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'devm_ioremap()' returns NULL on error, not an error pointer.
Fixes: f20cc9b00c7b ("irqchip/qcom: Add IRQ combiner driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: marc.zyngier@arm.com
Cc: kernel-janitors@vger.kernel.org
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/20170218083434.2289-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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If ip6_dst_lookup_tail has acquired a dst and fails the IPv4-mapped
check, release the dst before returning an error.
Fixes: ec5e3b0a1d41 ("ipv6: Inhibit IPv4-mapped src address on the wire.")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use rcuidle console tracepoint because, apparently, it may be issued
from an idle CPU:
hw-breakpoint: Failed to enable monitor mode on CPU 0.
hw-breakpoint: CPU 0 failed to disable vector catch
===============================
[ ERR: suspicious RCU usage. ]
4.10.0-rc8-next-20170215+ #119 Not tainted
-------------------------------
./include/trace/events/printk.h:32 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
RCU used illegally from idle CPU!
rcu_scheduler_active = 2, debug_locks = 0
RCU used illegally from extended quiescent state!
2 locks held by swapper/0/0:
#0: (cpu_pm_notifier_lock){......}, at: [<c0237e2c>] cpu_pm_exit+0x10/0x54
#1: (console_lock){+.+.+.}, at: [<c01ab350>] vprintk_emit+0x264/0x474
stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.0-rc8-next-20170215+ #119
Hardware name: Generic OMAP4 (Flattened Device Tree)
console_unlock
vprintk_emit
vprintk_default
printk
reset_ctrl_regs
dbg_cpu_pm_notify
notifier_call_chain
cpu_pm_exit
omap_enter_idle_coupled
cpuidle_enter_state
cpuidle_enter_state_coupled
do_idle
cpu_startup_entry
start_kernel
This RCU warning, however, is suppressed by lockdep_off() in printk().
lockdep_off() increments the ->lockdep_recursion counter and thus
disables RCU_LOCKDEP_WARN() and debug_lockdep_rcu_enabled(), which want
lockdep to be enabled "current->lockdep_recursion == 0".
Link: http://lkml.kernel.org/r/20170217015932.11898-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reported-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Russell King <rmk@armlinux.org.uk>
Cc: <stable@vger.kernel.org> [3.4+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch enables the Qualcomm RPM based Clock Controller present on
A-family boards.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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commit 82e88ff1ea94 ("hrtimer: Revert CLOCK_MONOTONIC_RAW support") removed
unfortunately a sanity check in the hrtimer code which was part of that
MONOTONIC_RAW patch series.
It would have caught the bogus usage of CLOCK_MONOTONIC_RAW in the wireless
code. So bring it back.
It is way too easy to take any random clockid and feed it to the hrtimer
subsystem. At best, it gets mapped to a monotonic base, but it would be
better to just catch illegal values as early as possible.
Detect invalid clockids, map them to CLOCK_MONOTONIC and emit a warning.
[ tglx: Replaced the BUG by a WARN and gracefully map to CLOCK_MONOTONIC ]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Tomasz Nowicki <tn@semihalf.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Link: http://lkml.kernel.org/r/1452879670-16133-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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A nested lock depth was added to the hasbin_delete() code but it
doesn't actually work some well and results in tons of lockdep splats.
Fix the code instead to properly drop the lock around the operation
and just keep peeking the head of the hashbin queue.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since the commit 0c1d70af924b ("net: use dst_cache for vxlan device")
vxlan_fill_metadata_dst() calls vxlan_get_route() passing a NULL
dst_cache pointer, so the latter should explicitly check for
valid dst_cache ptr. Unfortunately the commit d71785ffc7e7 ("net: add
dst_cache to ovs vxlan lwtunnel") removed said check.
As a result is possible to trigger a null pointer access calling
vxlan_fill_metadata_dst(), e.g. with:
ovs-vsctl add-br ovs-br0
ovs-vsctl add-port ovs-br0 vxlan0 -- set interface vxlan0 \
type=vxlan options:remote_ip=192.168.1.1 \
options:key=1234 options:dst_port=4789 ofport_request=10
ip address add dev ovs-br0 172.16.1.2/24
ovs-vsctl set Bridge ovs-br0 ipfix=@i -- --id=@i create IPFIX \
targets=\"172.16.1.1:1234\" sampling=1
iperf -c 172.16.1.1 -u -l 1000 -b 10M -t 1 -p 1234
This commit addresses the issue passing to vxlan_get_route() the
dst_cache already available into the lwt info processed by
vxlan_fill_metadata_dst().
Fixes: d71785ffc7e7 ("net: add dst_cache to ovs vxlan lwtunnel")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the current DCCP implementation an skb for a DCCP_PKT_REQUEST packet
is forcibly freed via __kfree_skb in dccp_rcv_state_process if
dccp_v6_conn_request successfully returns.
However, if IPV6_RECVPKTINFO is set on a socket, the address of the skb
is saved to ireq->pktopts and the ref count for skb is incremented in
dccp_v6_conn_request, so skb is still in use. Nevertheless, it gets freed
in dccp_rcv_state_process.
Fix by calling consume_skb instead of doing goto discard and therefore
calling __kfree_skb.
Similar fixes for TCP:
fb7e2399ec17f1004c0e0ccfd17439f8759ede01 [TCP]: skb is unexpectedly freed.
0aea76d35c9651d55bbaf746e7914e5f9ae5a25d tcp: SYN packets are now
simply consumed
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This should be >= instead of > here. It means that we don't increment
the free count enough so it becomes off by one.
Fixes: 9ad1a3749333 ("dpaa_eth: add support for DPAA Ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 6664498280cf ("packet: call fanout_release, while UNREGISTERING a
netdev"), unfortunately, introduced the following issues.
1. calling mutex_lock(&fanout_mutex) (fanout_release()) from inside
rcu_read-side critical section. rcu_read_lock disables preemption, most often,
which prohibits calling sleeping functions.
[ ] include/linux/rcupdate.h:560 Illegal context switch in RCU read-side critical section!
[ ]
[ ] rcu_scheduler_active = 1, debug_locks = 0
[ ] 4 locks held by ovs-vswitchd/1969:
[ ] #0: (cb_lock){++++++}, at: [<ffffffff8158a6c9>] genl_rcv+0x19/0x40
[ ] #1: (ovs_mutex){+.+.+.}, at: [<ffffffffa04878ca>] ovs_vport_cmd_del+0x4a/0x100 [openvswitch]
[ ] #2: (rtnl_mutex){+.+.+.}, at: [<ffffffff81564157>] rtnl_lock+0x17/0x20
[ ] #3: (rcu_read_lock){......}, at: [<ffffffff81614165>] packet_notifier+0x5/0x3f0
[ ]
[ ] Call Trace:
[ ] [<ffffffff813770c1>] dump_stack+0x85/0xc4
[ ] [<ffffffff810c9077>] lockdep_rcu_suspicious+0x107/0x110
[ ] [<ffffffff810a2da7>] ___might_sleep+0x57/0x210
[ ] [<ffffffff810a2fd0>] __might_sleep+0x70/0x90
[ ] [<ffffffff8162e80c>] mutex_lock_nested+0x3c/0x3a0
[ ] [<ffffffff810de93f>] ? vprintk_default+0x1f/0x30
[ ] [<ffffffff81186e88>] ? printk+0x4d/0x4f
[ ] [<ffffffff816106dd>] fanout_release+0x1d/0xe0
[ ] [<ffffffff81614459>] packet_notifier+0x2f9/0x3f0
2. calling mutex_lock(&fanout_mutex) inside spin_lock(&po->bind_lock).
"sleeping function called from invalid context"
[ ] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:620
[ ] in_atomic(): 1, irqs_disabled(): 0, pid: 1969, name: ovs-vswitchd
[ ] INFO: lockdep is turned off.
[ ] Call Trace:
[ ] [<ffffffff813770c1>] dump_stack+0x85/0xc4
[ ] [<ffffffff810a2f52>] ___might_sleep+0x202/0x210
[ ] [<ffffffff810a2fd0>] __might_sleep+0x70/0x90
[ ] [<ffffffff8162e80c>] mutex_lock_nested+0x3c/0x3a0
[ ] [<ffffffff816106dd>] fanout_release+0x1d/0xe0
[ ] [<ffffffff81614459>] packet_notifier+0x2f9/0x3f0
3. calling dev_remove_pack(&fanout->prot_hook), from inside
spin_lock(&po->bind_lock) or rcu_read-side critical-section. dev_remove_pack()
-> synchronize_net(), which might sleep.
[ ] BUG: scheduling while atomic: ovs-vswitchd/1969/0x00000002
[ ] INFO: lockdep is turned off.
[ ] Call Trace:
[ ] [<ffffffff813770c1>] dump_stack+0x85/0xc4
[ ] [<ffffffff81186274>] __schedule_bug+0x64/0x73
[ ] [<ffffffff8162b8cb>] __schedule+0x6b/0xd10
[ ] [<ffffffff8162c5db>] schedule+0x6b/0x80
[ ] [<ffffffff81630b1d>] schedule_timeout+0x38d/0x410
[ ] [<ffffffff810ea3fd>] synchronize_sched_expedited+0x53d/0x810
[ ] [<ffffffff810ea6de>] synchronize_rcu_expedited+0xe/0x10
[ ] [<ffffffff8154eab5>] synchronize_net+0x35/0x50
[ ] [<ffffffff8154eae3>] dev_remove_pack+0x13/0x20
[ ] [<ffffffff8161077e>] fanout_release+0xbe/0xe0
[ ] [<ffffffff81614459>] packet_notifier+0x2f9/0x3f0
4. fanout_release() races with calls from different CPU.
To fix the above problems, remove the call to fanout_release() under
rcu_read_lock(). Instead, call __dev_remove_pack(&fanout->prot_hook) and
netdev_run_todo will be happy that &dev->ptype_specific list is empty. In order
to achieve this, I moved dev_{add,remove}_pack() out of fanout_{add,release} to
__fanout_{link,unlink}. So, call to {,__}unregister_prot_hook() will make sure
fanout->prot_hook is removed as well.
Fixes: 6664498280cf ("packet: call fanout_release, while UNREGISTERING a netdev")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Anoob Soman <anoob.soman@citrix.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For a shared reset, when the reset is successful, the triggered_count is
incremented when trying to call the reset callback, so that another device
sharing the same reset line won't trigger it again. If the reset has not
been triggered successfully, the trigger_count should be decremented.
The code does the opposite, and decrements the trigger_count on success.
As a consequence, another device sharing the reset will be able to trigger
it again.
Fixed be removing negation in from of the error code of the reset function.
Fixes: 7da33a37b48f ("reset: allow using reset_control_reset with shared reset")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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On Skylake hardware, the link_poll isn't clearing the pending interrupt
bit. Adding a new function for SKX that handles clearing of status bit the
right way.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 783dfa6c ("ntb: Adding Skylake Xeon NTB support")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
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Fix typo causing ntb_transport_create_queue to select the first
queue every time, instead of using the next free queue.
Signed-off-by: Thomas VanSelus <tvanselus@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Fixes: fce8a7bb5 ("PCI-Express Non-Transparent Bridge Support")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
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In the normal I/O execution path, ntb_perf is missing a call to
dmaengine_unmap_put() after submission. That causes us to leak
unmap objects.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 8a7b6a77 ("ntb: ntb perf tool")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
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The call to debugfs_remove_recursive(qp->debugfs_dir) of the sub-level
directory must not be later than
debugfs_remove_recursive(nt_debugfs_dir) of the top-level directory.
Otherwise, the sub-level directory will not exist, and it would be
invalid (panic) to attempt to remove it. This removes the top-level
directory last, after sub-level directories have been cleaned up.
Signed-off-by: Allen Hubbe <Allen.Hubbe@dell.com>
Fixes: e26a5843f ("NTB: Split ntb_hw_intel and ntb_transport drivers")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
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This reverts commit 24b91e360ef521a2808771633d76ebc68bd5604b and commit
7bdb59f1ad47 ("tick/nohz: Fix possible missing clock reprog after tick
soft restart") that depends on it,
Pavel reports that it causes occasional boot hangs for him that seem to
depend on just how the machine was booted. In particular, his machine
hangs at around the PCI fixups of the EHCI USB host controller, but only
hangs from cold boot, not from a warm boot.
Thomas Gleixner suspecs it's a CPU hotplug interaction, particularly
since Pavel also saw suspend/resume issues that seem to be related.
We're reverting for now while trying to figure out the root cause.
Reported-bisected-and-tested-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org # reverted commits were marked for stable
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Annotate the KASAN shadow with address markers in page table
dump output:
$ cat /sys/kernel/debug/kernel_page_tables
...
---[ Vmemmap ]---
0xffffea0000000000-0xffffea0003000000 48M RW PSE GLB NX pmd
0xffffea0003000000-0xffffea0004000000 16M pmd
0xffffea0004000000-0xffffea0005000000 16M RW PSE GLB NX pmd
0xffffea0005000000-0xffffea0040000000 944M pmd
0xffffea0040000000-0xffffea8000000000 511G pud
0xffffea8000000000-0xffffec0000000000 1536G pgd
---[ KASAN shadow ]---
0xffffec0000000000-0xffffed0000000000 1T ro GLB NX pte
0xffffed0000000000-0xffffed0018000000 384M RW PSE GLB NX pmd
0xffffed0018000000-0xffffed0020000000 128M pmd
0xffffed0020000000-0xffffed0028200000 130M RW PSE GLB NX pmd
0xffffed0028200000-0xffffed0040000000 382M pmd
0xffffed0040000000-0xffffed8000000000 511G pud
0xffffed8000000000-0xfffff50000000000 7680G pgd
0xfffff50000000000-0xfffffbfff0000000 7339776M ro GLB NX pte
0xfffffbfff0000000-0xfffffbfff0200000 2M pmd
0xfffffbfff0200000-0xfffffbfff0a00000 8M RW PSE GLB NX pmd
0xfffffbfff0a00000-0xfffffbffffe00000 244M pmd
0xfffffbffffe00000-0xfffffc0000000000 2M ro GLB NX pte
---[ KASAN shadow end ]---
0xfffffc0000000000-0xffffff0000000000 3T pgd
---[ ESPfix Area ]---
...
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: kasan-dev@googlegroups.com
Cc: Tobias Regnery <tobias.regnery@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/20170214100839.17186-2-aryabinin@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Enabling both DEBUG_WX=y and KASAN=y options significantly increases
boot time (dozens of seconds at least).
KASAN fills kernel page tables with repeated values to map several
TBs of the virtual memory to the single kasan_zero_page:
kasan_zero_pud ->
kasan_zero_pmd->
kasan_zero_pte->
kasan_zero_page
So, the page table walker used to find W+X mapping check the same
kasan_zero_p?d page table entries a lot more than once.
With patch pud walker will skip the pud if it has the same value as
the previous one . Skipping done iff we search for W+X mappings,
so this optimization won't affect the page table dump via debugfs.
This dropped time spend in W+X check from ~30 sec to reasonable 0.1 sec:
Before:
[ 4.579991] Freeing unused kernel memory: 1000K
[ 35.257523] x86/mm: Checked W+X mappings: passed, no W+X pages found.
After:
[ 5.138756] Freeing unused kernel memory: 1000K
[ 5.266496] x86/mm: Checked W+X mappings: passed, no W+X pages found.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: kasan-dev@googlegroups.com
Cc: Tobias Regnery <tobias.regnery@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/20170214100839.17186-1-aryabinin@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Flags (PIPE_BUF_FLAG_PACKET, PIPE_BUF_FLAG_GIFT) could remain on the
unused part of the pipe ring buffer. Previously splice_to_pipe() left
the flags value alone, which could result in incorrect behavior.
Uninitialized flags appears to have been there from the introduction of
the splice syscall.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> # 2.6.17+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The crtc_h/vdisplay fields may not match the CRTC viewport dimensions
with special modes such as interlaced ones.
Fixes the HW cursor disappearing in the bottom half of the screen with
interlaced modes.
Fixes: 6b16cf7785a4 ("drm/radeon: Hide the HW cursor while it's out of bounds")
Cc: stable@vger.kernel.org
Reported-by: Ashutosh Kumar <ashutosh.kumar@amd.com>
Tested-by: Sonny Jiang <sonny.jiang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
|
|
The 64-bit get_user() wasn't clearing the high word due to a typo in the
error handler. The exception handler entry was already correct, though.
Noticed during recent usercopy test additions in lib/test_user_copy.c.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
|
In commit 76624175dcae ("arm64: uaccess: consistently check object sizes"),
the object size checks are moved outside the access_ok() so that bad
destinations are detected before hitting the "memset(dest, 0, size)" in the
copy_from_user() failure path.
This makes the same change for arm, with attention given to possibly
extracting the uaccess routines into a common header file for all
architectures in the future.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
|
wbt_disable_default() calls del_timer_sync() to wait for the wbt
timer to finish before disabling throttling. We can't do this with
IRQs disable. This fixes a lockdep splat on boot, if non-root
cgroups are used.
Reported-by: Gabriel C <nix.or.die@gmail.com>
Fixes: 87760e5eef35 ("block: hook up writeback throttling")
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
Allow the driver to work with device tree support.
Based on initial patch submission from Peter Fox.
Tested on a imx7d-sdb board connected to a SHT15 board via Mikro Bus.
Signed-off-by: Marco Franchi <marco.franchi@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
|
|
Currently, the IPID and Syndrome are printed on the same line as the
Address. There are cases when we can have a valid Syndrome but not a
valid Address.
For example, the MCA_SYND register can be used to hold more detailed
error info that the hardware folks can use. It's not just DRAM ECC
syndromes. There are some error types that aren't related to memory that
may have valid syndromes, like some errors related to links in the Data
Fabric, etc.
In these cases, the IPID and Syndrome are not printed at the same log
level as the rest of the stanza, so users won't see them on the console.
Console:
[Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
[Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2
Dmesg:
[Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
, Syndrome: 0x000000010b404000, IPID: 0x0001002e00000002
[Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2
Print the IPID first and on a new line. The IPID should always be
printed on SMCA systems. The Syndrome will then be printed with the IPID
and at the same log level when valid:
[Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
[Hardware Error]: IPID: 0x0001002e00000002, Syndrome: 0x000000010b404000
[Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2
Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1487192182-2474-1-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Borislav Petkov <bp@suse.de>
|
|
Although irqreturn_t is an enum, we treat it (and its enumeration
constants) as a bitmask.
However, bad_action_ret() uses a less-than operator to determine whether
an irqreturn_t falls within allowable bit values, which means we need to
know the signededness of an enum type to read the logic, which is
implementation-dependent.
This change explicitly uses an unsigned type for the comparison. We do
this instead of changing to a bitwise test, as the latter compiles to
increased instructions in this hot path.
It looks like we get the correct behaviour currently (bad_action_ret(-1)
returns 1), so this is purely a readability fix.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Link: http://lkml.kernel.org/r/1487219049-4061-1-git-send-email-jk@ozlabs.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
A bug fix to the MSIx handling in vfio added references to functions
that may not be defined if MSI is disabled in the kernel, resulting in
this link error:
drivers/built-in.o: In function `vfio_msi_set_vector_signal':
:(.text+0x450808): undefined reference to `get_cached_msi_msg'
:(.text+0x45080c): undefined reference to `write_msi_msg'
As suggested by Alex Williamson, add stub implementations for
get_cached_msi_msg() and pci_write_msi_msg().
In case this bugfix gets backported, please note that the #ifdef
has changed over time, originally both functions were implemented
in drivers/pci/msi.c and controlled by CONFIG_PCI_MSI, while nowadays
get_cached_msi_msg() is part of the generic MSI support and can be
used without PCI.
Fixes: b8f02af096b1 ("vfio/pci: Restore MSIx message prior to enabling")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Bart Van Assche <bart.vanassche@sandisk.com>
Link: http://lkml.kernel.org/r/1413190208.4202.34.camel@ul30vt.home
Link: http://lkml.kernel.org/r/20170214215343.3307861-1-arnd@arndb.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
The original feature bit is used in a different branch already. Move it to
scattered bits.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: d82718e348fe ("fuse_dev_splice_read(): switch to add_to_pipe()")
Cc: <stable@vger.kernel.org> # 4.9+
|
|
The addition of support for UV Hubless systems unneccessarily broke
the kABI for a symbol that is not used by external kernel modules.
Remove the symbol from the EXPORT list.
Signed-off-by: Mike Travis <mike.travis@hpe.com>
Reviewed-by: Russ Anderson <russ.anderson@hpe.com>
Link: http://lkml.kernel.org/r/20170215001129.068078379@asylum.americas.sgi.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
This reverts commits:
6a25478077d987edc5e2f880590a2bc5fcab4441
9dbbfb0ab6680c6a85609041011484e6658e7d3c
40137906c5f55c252194ef5834130383e639536f
It's too risky to put in this late in the release
cycle. We'll put these changes into the next merge
window instead.
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently, if the kernel is running on a POWER9 processor under a
hypervisor, it may try to use the radix MMU even though it doesn't have
the necessary code to do so (it doesn't negotiate use of radix, and it
doesn't do the H_REGISTER_PROC_TBL hcall). If the hypervisor supports
both radix and HPT, then it will set up the guest to use HPT (since the
guest doesn't request radix in the CAS call), but if the radix feature
bit is set in the ibm,pa-features property (which is valid, since
ibm,pa-features is defined to represent the capabilities of the
processor) the guest will try to use radix, resulting in a crash when
it turns the MMU on.
This makes the minimal fix for the current code, which is to disable
radix unless we are running in hypervisor mode.
Fixes: 2bfd65e45e87 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
|
Error reports received from firmware were not being converted from
big endian values, leading to bogus error codes reported on little
endian systems.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When a vNIC client driver requests a faulty device setting, the
server returns an acceptable value for the client to request.
This 64 bit value was incorrectly being swapped as a 32 bit value,
resulting in loss of data. This patch corrects that by using
the 64 bit swap function.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When setting a neigh related sysctl parameter, we always send a
NETEVENT_DELAY_PROBE_TIME_UPDATE netevent. For instance, when
executing
sysctl net.ipv6.neigh.wlp3s0.retrans_time_ms=2000
a NETEVENT_DELAY_PROBE_TIME_UPDATE netevent is generated.
This is caused by commit 2a4501ae18b5 ("neigh: Send a
notification when DELAY_PROBE_TIME changes"). According to the
commit's description, it was intended to generate such an event
when setting the "delay_first_probe_time" sysctl parameter.
In order to fix this, only generate this event when actually
setting the "delay_first_probe_time" sysctl parameter. This fix
should not have any unintended side-effects, because all but one
registered netevent callbacks check for other netevent event
types (the registered callbacks were obtained by grepping for
"register_netevent_notifier"). The only callback that uses the
NETEVENT_DELAY_PROBE_TIME_UPDATE event is
mlxsw_sp_router_netevent_event() (in
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c): in case
of this event, it only accesses the DELAY_PROBE_TIME of the
passed neigh_parms.
Fixes: 2a4501ae18b5 ("neigh: Send a notification when DELAY_PROBE_TIME changes")
Signed-off-by: Marcus Huewe <suse-tux@gmx.de>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The xilinx_emaclite uses __raw_writel and __raw_readl for register
accesses. Those functions do not imply any kind of memory barriers and
they may be reordered.
The driver does not seem to take that into account, though, and the
driver does not satisfy the ordering requirements of the hardware.
For clear examples, see xemaclite_mdio_write() and xemaclite_mdio_read()
which try to set MDIO address before initiating the transaction.
I'm seeing system freezes with the driver with GCC 5.4 and current
Linux kernels on Zynq-7000 SoC immediately when trying to use the
interface.
In commit 123c1407af87 ("net: emaclite: Do not use microblaze and ppc
IO functions") the driver was switched from non-generic
in_be32/out_be32 (memory barriers, big endian) to
__raw_readl/__raw_writel (no memory barriers, native endian), so
apparently the device follows system endianness and the driver was
originally written with the assumption of memory barriers.
Rather than try to hunt for each case of missing barrier, just switch
the driver to use iowrite32/ioread32/iowrite32be/ioread32be depending
on endianness instead.
Tested on little-endian Zynq-7000 ARM SoC FPGA.
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Fixes: 123c1407af87 ("net: emaclite: Do not use microblaze and ppc IO
functions")
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
xilinx_emaclite looks at the received data to try to determine the
Ethernet packet length but does not properly clamp it if
proto_type == ETH_P_IP or 1500 < proto_type <= 1518, causing a buffer
overflow and a panic via skb_panic() as the length exceeds the allocated
skb size.
Fix those cases.
Also add an additional unconditional check with WARN_ON() at the end.
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Fixes: bb81b2ddfa19 ("net: add Xilinx emac lite device driver")
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
In addition to making PME non-modular, d7def2040077 ("PCI/PME: Make
explicitly non-modular") removed the pcie_pme_driver .remove() method,
pcie_pme_remove().
pcie_pme_remove() freed the PME IRQ that was requested in pci_pme_probe().
The fact that we don't free the IRQ after d7def2040077 causes the following
crash when removing a PCIe port device via /sys:
------------[ cut here ]------------
kernel BUG at drivers/pci/msi.c:370!
invalid opcode: 0000 [#1] SMP
Modules linked in:
CPU: 1 PID: 14509 Comm: sh Tainted: G W 4.8.0-rc1-yh-00012-gd29438d
RIP: 0010:[<ffffffff9758bbf5>] free_msi_irqs+0x65/0x190
...
Call Trace:
[<ffffffff9758cda4>] pci_disable_msi+0x34/0x40
[<ffffffff97583817>] cleanup_service_irqs+0x27/0x30
[<ffffffff97583e9a>] pcie_port_device_remove+0x2a/0x40
[<ffffffff97584250>] pcie_portdrv_remove+0x40/0x50
[<ffffffff97576d7b>] pci_device_remove+0x4b/0xc0
[<ffffffff9785ebe6>] __device_release_driver+0xb6/0x150
[<ffffffff9785eca5>] device_release_driver+0x25/0x40
[<ffffffff975702e4>] pci_stop_bus_device+0x74/0xa0
[<ffffffff975704ea>] pci_stop_and_remove_bus_device_locked+0x1a/0x30
[<ffffffff97578810>] remove_store+0x50/0x70
[<ffffffff9785a378>] dev_attr_store+0x18/0x30
[<ffffffff97260b64>] sysfs_kf_write+0x44/0x60
[<ffffffff9725feae>] kernfs_fop_write+0x10e/0x190
[<ffffffff971e13f8>] __vfs_write+0x28/0x110
[<ffffffff970b0fa4>] ? percpu_down_read+0x44/0x80
[<ffffffff971e53a7>] ? __sb_start_write+0xa7/0xe0
[<ffffffff971e53a7>] ? __sb_start_write+0xa7/0xe0
[<ffffffff971e1f04>] vfs_write+0xc4/0x180
[<ffffffff971e3089>] SyS_write+0x49/0xa0
[<ffffffff97001a46>] do_syscall_64+0xa6/0x1b0
[<ffffffff9819201e>] entry_SYSCALL64_slow_path+0x25/0x25
...
RIP [<ffffffff9758bbf5>] free_msi_irqs+0x65/0x190
RSP <ffff89ad3085bc48>
---[ end trace f4505e1dac5b95d3 ]---
Segmentation fault
Restore pcie_pme_remove().
[bhelgaas: changelog]
Fixes: d7def2040077 ("PCI/PME: Make explicitly non-modular")
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org # v4.9+
|
|
As pointed out by clang, we were not providing a prototype for a
function before using it:
util/parse-events.y:699:6: error: conflicting types for 'parse_events_error'
void parse_events_error(YYLTYPE *loc, void *data,
^
/tmp/build/perf/util/parse-events-bison.c:2224:7: note: previous implicit declaration is here
yyerror (&yylloc, _data, scanner, YY_("syntax error"));
^
/tmp/build/perf/util/parse-events-bison.c:65:25: note: expanded from macro 'yyerror'
#define yyerror parse_events_error
1 error generated.
One line fix it.
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170215130605.GC4020@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The alias->unit field is an array, so to check that it is not set we
should see if it is an empty string, i.e. alias->unit[0], instead of
checking alias->unit != NULL, as this will _always_ evaluate to 'true'.
Pointed out by clang.
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170214182435.GD4458@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
We cannot do printk() from tk_debug_account_sleep_time(), because
tk_debug_account_sleep_time() is called under tk_core seq lock.
The reason why printk() is unsafe there is that console_sem may
invoke scheduler (up()->wake_up_process()->activate_task()), which,
in turn, can return back to timekeeping code, for instance, via
get_time()->ktime_get(), deadlocking the system on tk_core seq lock.
[ 48.950592] ======================================================
[ 48.950622] [ INFO: possible circular locking dependency detected ]
[ 48.950622] 4.10.0-rc7-next-20170213+ #101 Not tainted
[ 48.950622] -------------------------------------------------------
[ 48.950622] kworker/0:0/3 is trying to acquire lock:
[ 48.950653] (tk_core){----..}, at: [<c01cc624>] retrigger_next_event+0x4c/0x90
[ 48.950683]
but task is already holding lock:
[ 48.950683] (hrtimer_bases.lock){-.-...}, at: [<c01cc610>] retrigger_next_event+0x38/0x90
[ 48.950714]
which lock already depends on the new lock.
[ 48.950714]
the existing dependency chain (in reverse order) is:
[ 48.950714]
-> #5 (hrtimer_bases.lock){-.-...}:
[ 48.950744] _raw_spin_lock_irqsave+0x50/0x64
[ 48.950775] lock_hrtimer_base+0x28/0x58
[ 48.950775] hrtimer_start_range_ns+0x20/0x5c8
[ 48.950775] __enqueue_rt_entity+0x320/0x360
[ 48.950805] enqueue_rt_entity+0x2c/0x44
[ 48.950805] enqueue_task_rt+0x24/0x94
[ 48.950836] ttwu_do_activate+0x54/0xc0
[ 48.950836] try_to_wake_up+0x248/0x5c8
[ 48.950836] __setup_irq+0x420/0x5f0
[ 48.950836] request_threaded_irq+0xdc/0x184
[ 48.950866] devm_request_threaded_irq+0x58/0xa4
[ 48.950866] omap_i2c_probe+0x530/0x6a0
[ 48.950897] platform_drv_probe+0x50/0xb0
[ 48.950897] driver_probe_device+0x1f8/0x2cc
[ 48.950897] __driver_attach+0xc0/0xc4
[ 48.950927] bus_for_each_dev+0x6c/0xa0
[ 48.950927] bus_add_driver+0x100/0x210
[ 48.950927] driver_register+0x78/0xf4
[ 48.950958] do_one_initcall+0x3c/0x16c
[ 48.950958] kernel_init_freeable+0x20c/0x2d8
[ 48.950958] kernel_init+0x8/0x110
[ 48.950988] ret_from_fork+0x14/0x24
[ 48.950988]
-> #4 (&rt_b->rt_runtime_lock){-.-...}:
[ 48.951019] _raw_spin_lock+0x40/0x50
[ 48.951019] rq_offline_rt+0x9c/0x2bc
[ 48.951019] set_rq_offline.part.2+0x2c/0x58
[ 48.951049] rq_attach_root+0x134/0x144
[ 48.951049] cpu_attach_domain+0x18c/0x6f4
[ 48.951049] build_sched_domains+0xba4/0xd80
[ 48.951080] sched_init_smp+0x68/0x10c
[ 48.951080] kernel_init_freeable+0x160/0x2d8
[ 48.951080] kernel_init+0x8/0x110
[ 48.951080] ret_from_fork+0x14/0x24
[ 48.951110]
-> #3 (&rq->lock){-.-.-.}:
[ 48.951110] _raw_spin_lock+0x40/0x50
[ 48.951141] task_fork_fair+0x30/0x124
[ 48.951141] sched_fork+0x194/0x2e0
[ 48.951141] copy_process.part.5+0x448/0x1a20
[ 48.951171] _do_fork+0x98/0x7e8
[ 48.951171] kernel_thread+0x2c/0x34
[ 48.951171] rest_init+0x1c/0x18c
[ 48.951202] start_kernel+0x35c/0x3d4
[ 48.951202] 0x8000807c
[ 48.951202]
-> #2 (&p->pi_lock){-.-.-.}:
[ 48.951232] _raw_spin_lock_irqsave+0x50/0x64
[ 48.951232] try_to_wake_up+0x30/0x5c8
[ 48.951232] up+0x4c/0x60
[ 48.951263] __up_console_sem+0x2c/0x58
[ 48.951263] console_unlock+0x3b4/0x650
[ 48.951263] vprintk_emit+0x270/0x474
[ 48.951293] vprintk_default+0x20/0x28
[ 48.951293] printk+0x20/0x30
[ 48.951324] kauditd_hold_skb+0x94/0xb8
[ 48.951324] kauditd_thread+0x1a4/0x56c
[ 48.951324] kthread+0x104/0x148
[ 48.951354] ret_from_fork+0x14/0x24
[ 48.951354]
-> #1 ((console_sem).lock){-.....}:
[ 48.951385] _raw_spin_lock_irqsave+0x50/0x64
[ 48.951385] down_trylock+0xc/0x2c
[ 48.951385] __down_trylock_console_sem+0x24/0x80
[ 48.951385] console_trylock+0x10/0x8c
[ 48.951416] vprintk_emit+0x264/0x474
[ 48.951416] vprintk_default+0x20/0x28
[ 48.951416] printk+0x20/0x30
[ 48.951446] tk_debug_account_sleep_time+0x5c/0x70
[ 48.951446] __timekeeping_inject_sleeptime.constprop.3+0x170/0x1a0
[ 48.951446] timekeeping_resume+0x218/0x23c
[ 48.951477] syscore_resume+0x94/0x42c
[ 48.951477] suspend_enter+0x554/0x9b4
[ 48.951477] suspend_devices_and_enter+0xd8/0x4b4
[ 48.951507] enter_state+0x934/0xbd4
[ 48.951507] pm_suspend+0x14/0x70
[ 48.951507] state_store+0x68/0xc8
[ 48.951538] kernfs_fop_write+0xf4/0x1f8
[ 48.951538] __vfs_write+0x1c/0x114
[ 48.951538] vfs_write+0xa0/0x168
[ 48.951568] SyS_write+0x3c/0x90
[ 48.951568] __sys_trace_return+0x0/0x10
[ 48.951568]
-> #0 (tk_core){----..}:
[ 48.951599] lock_acquire+0xe0/0x294
[ 48.951599] ktime_get_update_offsets_now+0x5c/0x1d4
[ 48.951629] retrigger_next_event+0x4c/0x90
[ 48.951629] on_each_cpu+0x40/0x7c
[ 48.951629] clock_was_set_work+0x14/0x20
[ 48.951660] process_one_work+0x2b4/0x808
[ 48.951660] worker_thread+0x3c/0x550
[ 48.951660] kthread+0x104/0x148
[ 48.951690] ret_from_fork+0x14/0x24
[ 48.951690]
other info that might help us debug this:
[ 48.951690] Chain exists of:
tk_core --> &rt_b->rt_runtime_lock --> hrtimer_bases.lock
[ 48.951721] Possible unsafe locking scenario:
[ 48.951721] CPU0 CPU1
[ 48.951721] ---- ----
[ 48.951721] lock(hrtimer_bases.lock);
[ 48.951751] lock(&rt_b->rt_runtime_lock);
[ 48.951751] lock(hrtimer_bases.lock);
[ 48.951751] lock(tk_core);
[ 48.951782]
*** DEADLOCK ***
[ 48.951782] 3 locks held by kworker/0:0/3:
[ 48.951782] #0: ("events"){.+.+.+}, at: [<c0156590>] process_one_work+0x1f8/0x808
[ 48.951812] #1: (hrtimer_work){+.+...}, at: [<c0156590>] process_one_work+0x1f8/0x808
[ 48.951843] #2: (hrtimer_bases.lock){-.-...}, at: [<c01cc610>] retrigger_next_event+0x38/0x90
[ 48.951843] stack backtrace:
[ 48.951873] CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.10.0-rc7-next-20170213+
[ 48.951904] Workqueue: events clock_was_set_work
[ 48.951904] [<c0110208>] (unwind_backtrace) from [<c010c224>] (show_stack+0x10/0x14)
[ 48.951934] [<c010c224>] (show_stack) from [<c04ca6c0>] (dump_stack+0xac/0xe0)
[ 48.951934] [<c04ca6c0>] (dump_stack) from [<c019b5cc>] (print_circular_bug+0x1d0/0x308)
[ 48.951965] [<c019b5cc>] (print_circular_bug) from [<c019d2a8>] (validate_chain+0xf50/0x1324)
[ 48.951965] [<c019d2a8>] (validate_chain) from [<c019ec18>] (__lock_acquire+0x468/0x7e8)
[ 48.951995] [<c019ec18>] (__lock_acquire) from [<c019f634>] (lock_acquire+0xe0/0x294)
[ 48.951995] [<c019f634>] (lock_acquire) from [<c01d0ea0>] (ktime_get_update_offsets_now+0x5c/0x1d4)
[ 48.952026] [<c01d0ea0>] (ktime_get_update_offsets_now) from [<c01cc624>] (retrigger_next_event+0x4c/0x90)
[ 48.952026] [<c01cc624>] (retrigger_next_event) from [<c01e4e24>] (on_each_cpu+0x40/0x7c)
[ 48.952056] [<c01e4e24>] (on_each_cpu) from [<c01cafc4>] (clock_was_set_work+0x14/0x20)
[ 48.952056] [<c01cafc4>] (clock_was_set_work) from [<c015664c>] (process_one_work+0x2b4/0x808)
[ 48.952087] [<c015664c>] (process_one_work) from [<c0157774>] (worker_thread+0x3c/0x550)
[ 48.952087] [<c0157774>] (worker_thread) from [<c015d644>] (kthread+0x104/0x148)
[ 48.952087] [<c015d644>] (kthread) from [<c0107830>] (ret_from_fork+0x14/0x24)
Replace printk() with printk_deferred(), which does not call into
the scheduler.
Fixes: 0bf43f15db85 ("timekeeping: Prints the amounts of time spent during suspend")
Reported-and-tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: "[4.9+]" <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170215044332.30449-1-sergey.senozhatsky@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
100% reproducible issue found on SKL SkullCanyon NUC with two external
DP daisy-chained monitors in DP/MST mode. When turning off or changing
the input of the second monitor the machine stops with a kernel
oops. This issue happened with 4.8.8 as well as drm/drm-intel-nightly.
This issue is traced to an inconsistent control flow in
drm_dp_update_payload_part1(): the 'port' pointer is set to NULL at the
same time as 'req_payload.num_slots' is set to zero, but the pointer is
dereferenced even when req_payload.num_slot is zero.
The problematic dereference was introduced in commit dfda0df34
("drm/mst: rework payload table allocation to conform better") and may
impact all versions since v3.18
The fix suggested by Chris Wilson removes the kernel oops and was found to
work well after 10mn of monkey-testing with the second monitor power and
input buttons
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98990
Fixes: dfda0df34264 ("drm/mst: rework payload table allocation to conform better.")
Cc: Dave Airlie <airlied@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Nathan D Ciobanu <nathan.d.ciobanu@linux.intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: <stable@vger.kernel.org> # v3.18+
Tested-by: Nathan D Ciobanu <nathan.d.ciobanu@linux.intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1487076561-2169-1-git-send-email-jani.nikula@intel.com
|
|
There is a potential race between fuse_dev_do_write()
and request_wait_answer() contexts as shown below:
TASK 1:
__fuse_request_send():
|--spin_lock(&fiq->waitq.lock);
|--queue_request();
|--spin_unlock(&fiq->waitq.lock);
|--request_wait_answer():
|--if (test_bit(FR_SENT, &req->flags))
<gets pre-empted after it is validated true>
TASK 2:
fuse_dev_do_write():
|--clears bit FR_SENT,
|--request_end():
|--sets bit FR_FINISHED
|--spin_lock(&fiq->waitq.lock);
|--list_del_init(&req->intr_entry);
|--spin_unlock(&fiq->waitq.lock);
|--fuse_put_request();
|--queue_interrupt();
<request gets queued to interrupts list>
|--wake_up_locked(&fiq->waitq);
|--wait_event_freezable();
<as FR_FINISHED is set, it returns and then
the caller frees this request>
Now, the next fuse_dev_do_read(), see interrupts list is not empty
and then calls fuse_read_interrupt() which tries to access the request
which is already free'd and gets the below crash:
[11432.401266] Unable to handle kernel paging request at virtual address
6b6b6b6b6b6b6b6b
...
[11432.418518] Kernel BUG at ffffff80083720e0
[11432.456168] PC is at __list_del_entry+0x6c/0xc4
[11432.463573] LR is at fuse_dev_do_read+0x1ac/0x474
...
[11432.679999] [<ffffff80083720e0>] __list_del_entry+0x6c/0xc4
[11432.687794] [<ffffff80082c65e0>] fuse_dev_do_read+0x1ac/0x474
[11432.693180] [<ffffff80082c6b14>] fuse_dev_read+0x6c/0x78
[11432.699082] [<ffffff80081d5638>] __vfs_read+0xc0/0xe8
[11432.704459] [<ffffff80081d5efc>] vfs_read+0x90/0x108
[11432.709406] [<ffffff80081d67f0>] SyS_read+0x58/0x94
As FR_FINISHED bit is set before deleting the intr_entry with input
queue lock in request completion path, do the testing of this flag and
queueing atomically with the same lock in queue_interrupt().
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: fd22d62ed0c3 ("fuse: no fc->lock for iqueue parts")
Cc: <stable@vger.kernel.org> # 4.2+
|
Roderick Colenbrander
Daniel Drake
Jiri Kosina
Peter Zijlstra
Linus Torvalds
Al Viro
Johannes Thumshirn
Christophe JAILLET
Willem de Bruijn
Sergey Senozhatsky
Andy Gross
Marc Zyngier
David S. Miller
Paolo Abeni
Andrey Konovalov
Dan Carpenter
Anoob Soman
Jerome Brunet
Dave Jiang
Thomas VanSelus
Allen Hubbe
Andrey Ryabinin
Miklos Szeredi
Michel Dänzer
Kees Cook
Jens Axboe
Marco Franchi
Yazen Ghannam
Jeremy Kerr
Arnd Bergmann
Thomas Gleixner
travis@sgi.com
Paul Mackerras
Thomas Falcon
Marcus Huewe
Anssi Hannula
Yinghai Lu
Arnaldo Carvalho de Melo
Pierre-Louis Bossart
Sahitya Tummala