WARNING: CPU: 1 PID: 9406 at kernel/events/core.c:3554 perf_event_read+0x173/0x180

Severity

Found by

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Linux-kernel Mailing List Report

Kernel Splat

1. You can potentially trigger with just perf stat -a -I 10

   [  737.542476] WARNING: CPU: 1 PID: 9406 at kernel/events/core.c:3554 perf_event_read+0x173/0x180
   [  737.628175] CPU: 1 PID: 9406 Comm: perf_fuzzer Tainted: G        W       4.8.0-rc3+ #190
   [  737.637224] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014
   [  737.645585]  0000000000000000 ffff88011943bd30 ffffffff8143a3d1 0000000000000000
   [  737.654033]  0000000000000000 ffff88011943bd70 ffffffff81076c8b 00000de2161a8680
   [  737.662476]  ffff880117089800 0000000000000001 000000000000000a ffff880114ee5dc0
   [  737.670935] Call Trace:
   [  737.673978]  [] dump_stack+0x63/0x82
   [  737.679913]  [] __warn+0xcb/0xf0
   [  737.685464]  [] warn_slowpath_null+0x1d/0x20
   [  737.692108]  [] perf_event_read+0x173/0x180
   [  737.698673]  [] perf_read+0xcf/0x300
   [  737.704586]  [] ? __do_page_fault+0x1f9/0x4b0
   [  737.711333]  [] __vfs_read+0x28/0x110
   [  737.717358]  [] ? security_file_permission+0xa0/0xc0
   [  737.724770]  [] ? rw_verify_area+0x4e/0xb0
   [  737.731233]  [] vfs_read+0x95/0x140
   [  737.737062]  [] SyS_read+0x49/0xa0
   [  737.742785]  [] entry_SYSCALL_64_fastpath+0x1e/0xad
   [  737.750099] ---[ end trace e20d5745edd63baa ]---