From 1c2734b31d72316e3faaad88c0c9c46fa92a4b20 Mon Sep 17 00:00:00 2001 From: Raghuram Chary J Date: Wed, 11 Apr 2018 20:36:36 +0530 Subject: lan78xx: PHY DSP registers initialization to address EEE link drop issues with long cables The patch is to configure DSP registers of PHY device to handle Gbe-EEE failures with >40m cable length. Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver") Signed-off-by: Raghuram Chary J Signed-off-by: David S. Miller --- include/linux/microchipphy.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/microchipphy.h b/include/linux/microchipphy.h index eb492d47f717..8f9c90379732 100644 --- a/include/linux/microchipphy.h +++ b/include/linux/microchipphy.h @@ -70,4 +70,12 @@ #define LAN88XX_MMD3_CHIP_ID (32877) #define LAN88XX_MMD3_CHIP_REV (32878) +/* DSP registers */ +#define PHY_ARDENNES_MMD_DEV_3_PHY_CFG (0x806A) +#define PHY_ARDENNES_MMD_DEV_3_PHY_CFG_ZD_DLY_EN_ (0x2000) +#define LAN88XX_EXT_PAGE_ACCESS_TR (0x52B5) +#define LAN88XX_EXT_PAGE_TR_CR 16 +#define LAN88XX_EXT_PAGE_TR_LOW_DATA 17 +#define LAN88XX_EXT_PAGE_TR_HIGH_DATA 18 + #endif /* _MICROCHIPPHY_H */ -- cgit v1.2.3-59-g8ed1b From 5968a70d7af5f2abbd9d9f9c8e86da51f0a6b16d Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Mon, 16 Apr 2018 12:32:55 -0700 Subject: textsearch: fix kernel-doc warnings and add kernel-api section Make lib/textsearch.c usable as kernel-doc. Add textsearch() function family to kernel-api documentation. Fix kernel-doc warnings in : ../include/linux/textsearch.h:65: warning: Incorrect use of kernel-doc format: * get_next_block - fetch next block of data ../include/linux/textsearch.h:82: warning: Incorrect use of kernel-doc format: * finish - finalize/clean a series of get_next_block() calls Signed-off-by: Randy Dunlap Signed-off-by: David S. Miller --- Documentation/core-api/kernel-api.rst | 13 ++++++++++++ include/linux/textsearch.h | 4 ++-- lib/textsearch.c | 40 ++++++++++++++++++++--------------- 3 files changed, 38 insertions(+), 19 deletions(-) (limited to 'include/linux') diff --git a/Documentation/core-api/kernel-api.rst b/Documentation/core-api/kernel-api.rst index ff335f8aeb39..92f30006adae 100644 --- a/Documentation/core-api/kernel-api.rst +++ b/Documentation/core-api/kernel-api.rst @@ -136,6 +136,19 @@ Sorting .. kernel-doc:: lib/list_sort.c :export: +Text Searching +-------------- + +.. kernel-doc:: lib/textsearch.c + :doc: ts_intro + +.. kernel-doc:: lib/textsearch.c + :export: + +.. kernel-doc:: include/linux/textsearch.h + :functions: textsearch_find textsearch_next \ + textsearch_get_pattern textsearch_get_pattern_len + UUID/GUID --------- diff --git a/include/linux/textsearch.h b/include/linux/textsearch.h index 0494db3fd9e8..13770cfe33ad 100644 --- a/include/linux/textsearch.h +++ b/include/linux/textsearch.h @@ -62,7 +62,7 @@ struct ts_config int flags; /** - * get_next_block - fetch next block of data + * @get_next_block: fetch next block of data * @consumed: number of bytes consumed by the caller * @dst: destination buffer * @conf: search configuration @@ -79,7 +79,7 @@ struct ts_config struct ts_state *state); /** - * finish - finalize/clean a series of get_next_block() calls + * @finish: finalize/clean a series of get_next_block() calls * @conf: search configuration * @state: search state * diff --git a/lib/textsearch.c b/lib/textsearch.c index 0b79908dfe89..5939549c0e7b 100644 --- a/lib/textsearch.c +++ b/lib/textsearch.c @@ -10,7 +10,10 @@ * Pablo Neira Ayuso * * ========================================================================== - * + */ + +/** + * DOC: ts_intro * INTRODUCTION * * The textsearch infrastructure provides text searching facilities for @@ -19,7 +22,9 @@ * * ARCHITECTURE * - * User + * .. code-block:: none + * + * User * +----------------+ * | finish()|<--------------(6)-----------------+ * |get_next_block()|<--------------(5)---------------+ | @@ -33,21 +38,21 @@ * | (3)|----->| find()/next() |-----------+ | * | (7)|----->| destroy() |----------------------+ * +----------------+ +---------------+ - * - * (1) User configures a search by calling _prepare() specifying the - * search parameters such as the pattern and algorithm name. + * + * (1) User configures a search by calling textsearch_prepare() specifying + * the search parameters such as the pattern and algorithm name. * (2) Core requests the algorithm to allocate and initialize a search * configuration according to the specified parameters. - * (3) User starts the search(es) by calling _find() or _next() to - * fetch subsequent occurrences. A state variable is provided - * to the algorithm to store persistent variables. + * (3) User starts the search(es) by calling textsearch_find() or + * textsearch_next() to fetch subsequent occurrences. A state variable + * is provided to the algorithm to store persistent variables. * (4) Core eventually resets the search offset and forwards the find() * request to the algorithm. * (5) Algorithm calls get_next_block() provided by the user continuously * to fetch the data to be searched in block by block. * (6) Algorithm invokes finish() after the last call to get_next_block * to clean up any leftovers from get_next_block. (Optional) - * (7) User destroys the configuration by calling _destroy(). + * (7) User destroys the configuration by calling textsearch_destroy(). * (8) Core notifies the algorithm to destroy algorithm specific * allocations. (Optional) * @@ -62,9 +67,10 @@ * amount of times and even in parallel as long as a separate struct * ts_state variable is provided to every instance. * - * The actual search is performed by either calling textsearch_find_- - * continuous() for linear data or by providing an own get_next_block() - * implementation and calling textsearch_find(). Both functions return + * The actual search is performed by either calling + * textsearch_find_continuous() for linear data or by providing + * an own get_next_block() implementation and + * calling textsearch_find(). Both functions return * the position of the first occurrence of the pattern or UINT_MAX if * no match was found. Subsequent occurrences can be found by calling * textsearch_next() regardless of the linearity of the data. @@ -72,7 +78,7 @@ * Once you're done using a configuration it must be given back via * textsearch_destroy. * - * EXAMPLE + * EXAMPLE:: * * int pos; * struct ts_config *conf; @@ -87,13 +93,13 @@ * goto errout; * } * - * pos = textsearch_find_continuous(conf, &state, example, strlen(example)); + * pos = textsearch_find_continuous(conf, \&state, example, strlen(example)); * if (pos != UINT_MAX) - * panic("Oh my god, dancing chickens at %d\n", pos); + * panic("Oh my god, dancing chickens at \%d\n", pos); * * textsearch_destroy(conf); - * ========================================================================== */ +/* ========================================================================== */ #include #include @@ -225,7 +231,7 @@ static unsigned int get_linear_data(unsigned int consumed, const u8 **dst, * * Returns the position of first occurrence of the pattern or * %UINT_MAX if no occurrence was found. - */ + */ unsigned int textsearch_find_continuous(struct ts_config *conf, struct ts_state *state, const void *data, unsigned int len) -- cgit v1.2.3-59-g8ed1b From 7ce2367254e84753bceb07327aaf5c953cfce117 Mon Sep 17 00:00:00 2001 From: Toshiaki Makita Date: Tue, 17 Apr 2018 18:46:14 +0900 Subject: vlan: Fix reading memory beyond skb->tail in skb_vlan_tagged_multi Syzkaller spotted an old bug which leads to reading skb beyond tail by 4 bytes on vlan tagged packets. This is caused because skb_vlan_tagged_multi() did not check skb_headlen. BUG: KMSAN: uninit-value in eth_type_vlan include/linux/if_vlan.h:283 [inline] BUG: KMSAN: uninit-value in skb_vlan_tagged_multi include/linux/if_vlan.h:656 [inline] BUG: KMSAN: uninit-value in vlan_features_check include/linux/if_vlan.h:672 [inline] BUG: KMSAN: uninit-value in dflt_features_check net/core/dev.c:2949 [inline] BUG: KMSAN: uninit-value in netif_skb_features+0xd1b/0xdc0 net/core/dev.c:3009 CPU: 1 PID: 3582 Comm: syzkaller435149 Not tainted 4.16.0+ #82 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 eth_type_vlan include/linux/if_vlan.h:283 [inline] skb_vlan_tagged_multi include/linux/if_vlan.h:656 [inline] vlan_features_check include/linux/if_vlan.h:672 [inline] dflt_features_check net/core/dev.c:2949 [inline] netif_skb_features+0xd1b/0xdc0 net/core/dev.c:3009 validate_xmit_skb+0x89/0x1320 net/core/dev.c:3084 __dev_queue_xmit+0x1cb2/0x2b60 net/core/dev.c:3549 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3590 packet_snd net/packet/af_packet.c:2944 [inline] packet_sendmsg+0x7c57/0x8a10 net/packet/af_packet.c:2969 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] sock_write_iter+0x3b9/0x470 net/socket.c:909 do_iter_readv_writev+0x7bb/0x970 include/linux/fs.h:1776 do_iter_write+0x30d/0xd40 fs/read_write.c:932 vfs_writev fs/read_write.c:977 [inline] do_writev+0x3c9/0x830 fs/read_write.c:1012 SYSC_writev+0x9b/0xb0 fs/read_write.c:1085 SyS_writev+0x56/0x80 fs/read_write.c:1082 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x43ffa9 RSP: 002b:00007fff2cff3948 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ffa9 RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00000000006cb018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018d0 R13: 0000000000401960 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slub.c:2737 [inline] __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2cf/0x9f0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:984 [inline] alloc_skb_with_frags+0x1d4/0xb20 net/core/skbuff.c:5234 sock_alloc_send_pskb+0xb56/0x1190 net/core/sock.c:2085 packet_alloc_skb net/packet/af_packet.c:2803 [inline] packet_snd net/packet/af_packet.c:2894 [inline] packet_sendmsg+0x6444/0x8a10 net/packet/af_packet.c:2969 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] sock_write_iter+0x3b9/0x470 net/socket.c:909 do_iter_readv_writev+0x7bb/0x970 include/linux/fs.h:1776 do_iter_write+0x30d/0xd40 fs/read_write.c:932 vfs_writev fs/read_write.c:977 [inline] do_writev+0x3c9/0x830 fs/read_write.c:1012 SYSC_writev+0x9b/0xb0 fs/read_write.c:1085 SyS_writev+0x56/0x80 fs/read_write.c:1082 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Fixes: 58e998c6d239 ("offloading: Force software GSO for multiple vlan tags.") Reported-and-tested-by: syzbot+0bbe42c764feafa82c5a@syzkaller.appspotmail.com Signed-off-by: Toshiaki Makita Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 7 +++++-- net/core/dev.c | 2 +- 2 files changed, 6 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index d11f41d5269f..78a5a90b4267 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -663,7 +663,7 @@ static inline bool skb_vlan_tagged(const struct sk_buff *skb) * Returns true if the skb is tagged with multiple vlan headers, regardless * of whether it is hardware accelerated or not. */ -static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) +static inline bool skb_vlan_tagged_multi(struct sk_buff *skb) { __be16 protocol = skb->protocol; @@ -673,6 +673,9 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) if (likely(!eth_type_vlan(protocol))) return false; + if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN))) + return false; + veh = (struct vlan_ethhdr *)skb->data; protocol = veh->h_vlan_encapsulated_proto; } @@ -690,7 +693,7 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) * * Returns features without unsafe ones if the skb has multiple tags. */ -static inline netdev_features_t vlan_features_check(const struct sk_buff *skb, +static inline netdev_features_t vlan_features_check(struct sk_buff *skb, netdev_features_t features) { if (skb_vlan_tagged_multi(skb)) { diff --git a/net/core/dev.c b/net/core/dev.c index 969462ebb296..af0558b00c6c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2969,7 +2969,7 @@ netdev_features_t passthru_features_check(struct sk_buff *skb, } EXPORT_SYMBOL(passthru_features_check); -static netdev_features_t dflt_features_check(const struct sk_buff *skb, +static netdev_features_t dflt_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { -- cgit v1.2.3-59-g8ed1b