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| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2020-06-10 01:12:44 +0000 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-06-16 21:21:02 -0400 |
| commit | e9b7b1c0c103a623be1a65c39f98719803440871 (patch) | |
| tree | 33cc95e038fde369b2c6c3c3985d07985e8657b7 /drivers | |
| parent | 9b38cc704e844e41d9cf74e647bff1d249512cb3 (diff) | |
| download | linux-e9b7b1c0c103a623be1a65c39f98719803440871.tar.bz2 | |
sample-trace-array: Fix sleeping function called from invalid context
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:935
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/5
1 lock held by swapper/5/0:
#0: ffff80001002bd90 (samples/ftrace/sample-trace-array.c:38){+.-.}-{0:0}, at: call_timer_fn+0x8/0x3e0
CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.7.0+ #8
Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
Call trace:
dump_backtrace+0x0/0x1a0
show_stack+0x20/0x30
dump_stack+0xe4/0x150
___might_sleep+0x160/0x200
__might_sleep+0x58/0x90
__mutex_lock+0x64/0x948
mutex_lock_nested+0x3c/0x58
__ftrace_set_clr_event+0x44/0x88
trace_array_set_clr_event+0x24/0x38
mytimer_handler+0x34/0x40 [sample_trace_array]
mutex_lock() will be called in interrupt context, using workqueue to fix it.
Link: https://lkml.kernel.org/r/20200610011244.2209486-1-wangkefeng.wang@huawei.com
Cc: stable@vger.kernel.org
Fixes: 89ed42495ef4 ("tracing: Sample module to demonstrate kernel access to Ftrace instances.")
Reviewed-by: Divya Indi <divya.indi@oracle.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions