linux-kernel - Re: [tip: perf/core] perf: Fix event_function

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Message-Id: <20240813151959.99058-1-naresh.kamboju@linaro.org>
Date: Tue, 13 Aug 2024 20:49:59 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: pengfei.xu@...el.com
Cc: kan.liang@...ux.intel.com,
	linux-kernel@...r.kernel.org,
	linux-tip-commits@...r.kernel.org,
	namhyung@...nel.org,
	peterz@...radead.org,
	syzkaller-bugs@...glegroups.com,
	x86@...nel.org,
	lkft-triage@...ts.linaro.org,
	dan.carpenter@...aro.org,
	anders.roxell@...aro.org,
	arnd@...db.de,
	Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: [tip: perf/core] perf: Fix event_function_call() locking

While running LTP test cases splice07 and perf_event_open01 found following
kernel BUG running on arm64 device juno-r2 and qemu-arm64 on the Linux
next-20240812 and next-20240813 tag.

  GOOD: next-20240809
  BAD: next-20240812

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Test log:
--------
[ 2278.760258] check_preemption_disabled: 15 callbacks suppressed
[ 2278.760282] BUG: using smp_processor_id() in preemptible [00000000] code: perf_event_open/111076
[ 2278.775032] caller is debug_smp_processor_id+0x20/0x30
[ 2278.780270] CPU: 5 UID: 0 PID: 111076 Comm: perf_event_open Not tainted 6.11.0-rc3-next-20240812 #1
[ 2278.789344] Hardware name: ARM Juno development board (r2) (DT)
[ 2278.795276] Call trace:
[ 2278.797724]  dump_backtrace+0x9c/0x128
[ 2278.801487]  show_stack+0x20/0x38
[ 2278.804812]  dump_stack_lvl+0xbc/0xd0
[ 2278.808487]  dump_stack+0x18/0x28
[ 2278.811811]  check_preemption_disabled+0xd8/0xf8
[ 2278.816446]  debug_smp_processor_id+0x20/0x30
[ 2278.820818]  event_function_call+0x54/0x168
[ 2278.825015]  _perf_event_enable+0x78/0xa8
[ 2278.829037]  perf_event_for_each_child+0x44/0xa0
[ 2278.833672]  _perf_ioctl+0x1bc/0xae0
[ 2278.837262]  perf_ioctl+0x58/0x90
[ 2278.840590]  __arm64_sys_ioctl+0xb4/0x100
[ 2278.844615]  invoke_syscall+0x50/0x120
[ 2278.848381]  el0_svc_common.constprop.0+0x48/0xf0
[ 2278.853103]  do_el0_svc+0x24/0x38
[ 2278.856432]  el0_svc+0x3c/0x108
[ 2278.859585]  el0t_64_sync_handler+0x120/0x130
[ 2278.863956]  el0t_64_sync+0x190/0x198
[ 2279.068732] BUG: using smp_processor_id() in preemptible [00000000] code: perf_event_open/111076
[ 2279.077570] caller is debug_smp_processor_id+0x20/0x30
[ 2279.082754] CPU: 1 UID: 0 PID: 111076 Comm: perf_event_open Not tainted 6.11.0-rc3-next-20240812 #1
[ 2279.091823] Hardware name: ARM Juno development board (r2) (DT)

Full test log:
---------
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240813/testrun/24833616/suite/log-parser-test/test/check-kernel-bug/log
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240813/testrun/24833616/suite/log-parser-test/tests/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240812/testrun/24821160/suite/log-parser-test/test/check-kernel-bug-483bde618da4ec98e33eefb5e26adeb267f80cc2461569605f3166ce12b3fe82/log

metadata:
  artifact-location: https://storage.tuxsuite.com/public/linaro/lkft/builds/2kXsz6nJO7pJ1nL4xGlKHYhiLx9/
  build-url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2kXsz6nJO7pJ1nL4xGlKHYhiLx9/
  build_name: gcc-13-lkftconfig-debug
  git_describe: next-20240812
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git_sha: 9e6869691724b12e1f43655eeedc35fade38120c
  kernel-config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2kXsz6nJO7pJ1nL4xGlKHYhiLx9/config
  kernel_version: 6.11.0-rc3
  toolchain: gcc-13

--
Linaro LKFT
https://lkft.linaro.org