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| Started by | Vince Weaver <vincent.weaver@maine.edu> |
|---|---|
| First post | 2015-06-18 01:30 +0200 |
| Last post | 2015-06-18 01:30 +0200 |
| Articles | 1 — 1 participant |
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perf/ftrace: fuzzer triggers another warning with PERF_EVENT_IOC_SET_FILTER Vince Weaver <vincent.weaver@maine.edu> - 2015-06-18 01:30 +0200
| From | Vince Weaver <vincent.weaver@maine.edu> |
|---|---|
| Date | 2015-06-18 01:30 +0200 |
| Subject | perf/ftrace: fuzzer triggers another warning with PERF_EVENT_IOC_SET_FILTER |
| Message-ID | <pCuWo-7JA-53@gated-at.bofh.it> |
The fuzzer triggered another warning in the PERF_EVENT_IOC_SET_FILTER code. This is with the previous filter patch applied. From what I can tell the filter was: nfs4:nfs4_fsinfo (((fhandle~601)&&valid&809)&&common_type>=860) The warning in question: WARN_ON_ONCE(cnt < 0); in check_preds(). [65903.660154] WARNING: CPU: 1 PID: 731 at kernel/trace/trace_events_filter.c:1388 replace_preds+0x2e4/0xa50() [65903.748080] CPU: 1 PID: 731 Comm: perf_fuzzer Tainted: G W 4.1.0-rc8+ #157 [65903.757203] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 [65903.765711] ffffffff81a1ac00 ffff880117117cb8 ffffffff816d7419 0000000000000000 [65903.774323] 0000000000000000 ffff880117117cf8 ffffffff81072eba 0000000000000005 [65903.782924] 0000000000000003 ffff8800366bd018 ffff8800366bd000 ffff8800cf3e9220 [65903.791516] Call Trace: [65903.794688] [<ffffffff816d7419>] dump_stack+0x45/0x57 [65903.800732] [<ffffffff81072eba>] warn_slowpath_common+0x8a/0xc0 [65903.807712] [<ffffffff81072faa>] warn_slowpath_null+0x1a/0x20 [65903.814477] [<ffffffff8114b1c4>] replace_preds+0x2e4/0xa50 [65903.820974] [<ffffffff8114c2c3>] ? ftrace_profile_set_filter+0x23/0x100 [65903.828640] [<ffffffff8114b9b2>] create_filter+0x82/0xb0 [65903.834917] [<ffffffff8114c2f4>] ftrace_profile_set_filter+0x54/0x100 [65903.842436] [<ffffffff811909eb>] ? strndup_user+0x4b/0xc0 [65903.848794] [<ffffffff81166290>] perf_ioctl+0x170/0x4d0 [65903.854959] [<ffffffff812023d0>] do_vfs_ioctl+0x2e0/0x4e0 [65903.861286] [<ffffffff816dcdfe>] ? mutex_unlock+0xe/0x10 [65903.867492] [<ffffffff81164756>] ? perf_event_task_enable+0xb6/0xd0 [65903.874754] [<ffffffff81202651>] SyS_ioctl+0x81/0xa0 [65903.880655] [<ffffffff816df372>] system_call_fastpath+0x16/0x7a [65903.887534] ---[ end trace 48137d0593a025d9 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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