diff options
| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-18 09:08:05 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-18 09:08:05 +0100 |
| commit | d9e3d899bc7a852d44b3305ed49799fbf090e756 (patch) | |
| tree | f3a75cb5f60be908a4384bd9e7add08486d7d338 /kernel/trace/trace_stack.c | |
| parent | usb: usbtest: Add TEST 29, toggle sync, Clear toggle between bulk writes (diff) | |
| parent | Linux 4.15-rc4 (diff) | |
| download | wireguard-linux-d9e3d899bc7a852d44b3305ed49799fbf090e756.tar.xz wireguard-linux-d9e3d899bc7a852d44b3305ed49799fbf090e756.zip | |
Merge 4.15-rc4 into usb-next
We want the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 734accc02418..3c7bfc4bf5e9 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -209,6 +209,10 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip, if (__this_cpu_read(disable_stack_tracer) != 1) goto out; + /* If rcu is not watching, then save stack trace can fail */ + if (!rcu_is_watching()) + goto out; + ip += MCOUNT_INSN_SIZE; check_stack(ip, &stack); |