Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 511e5fb0c3ab42d4897dcc5c0fbd1765e8a3d622 ("[PATCH 8/8] drm/i915: Don't disable interrupts and pretend a lock as been acquired in __timeline_mark_lock().") url: https://github.com/0day-ci/linux/commits/Sebastian-Andrzej-Siewior/drm-i915-... base: git://anongit.freedesktop.org/drm-intel for-linux-next
in testcase: kernel-selftests version: kernel-selftests-x86_64-c8c9111a-1_20210929 with following parameters:
group: x86 ucode: 0xde
test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
on test machine: 4 threads 1 sockets Intel(R) Core(TM) i7-7567U CPU @ 3.50GHz with 32G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
If you fix the issue, kindly add following tag Reported-by: kernel test robot oliver.sang@intel.com
kern :warn : [ 22.629411] ============================= kern :warn : [ 22.629781] WARNING: suspicious RCU usage kern :warn : [ 22.630161] 5.15.0-rc1-00267-g511e5fb0c3ab #1 Not tainted kern :warn : [ 22.630629] ----------------------------- kern :warn : [ 22.630987] drivers/gpu/drm/i915/i915_request.h:612 suspicious rcu_dereference_protected() usage! kern :warn : [ 22.631697] other info that might help us debug this:
kern :warn : [ 22.632455] rcu_scheduler_active = 2, debug_locks = 1 kern :warn : [ 22.633068] 2 locks held by systemd-udevd/220: kern :warn : [ 22.633456] #0: ffff8881012e7248 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x93/0x180 kern :warn : [ 22.634148] #1: ffff8881032a21e0 (wakeref.mutex#3){+.+.}-{3:3}, at: __intel_wakeref_put_last+0x1b/0x80 [i915] kern :warn : [ 22.635067] stack backtrace: kern :warn : [ 22.635515] CPU: 0 PID: 220 Comm: systemd-udevd Not tainted 5.15.0-rc1-00267-g511e5fb0c3ab #1 kern :warn : [ 22.636184] Hardware name: Intel Corporation NUC7i7BNH/NUC7i7BNB, BIOS BNKBL357.86A.0067.2018.0814.1500 08/14/2018 kern :warn : [ 22.636982] Call Trace: kern :warn : [ 22.637225] dump_stack_lvl+0x45/0x59 kern :warn : [ 22.637556] __i915_request_commit+0x158/0x1c0 [i915] kern :warn : [ 22.638103] __engine_park+0x98/0x280 [i915] kern :warn : [ 22.638575] ? mutex_trylock+0x141/0x180 kern :warn : [ 22.638921] ? __intel_wakeref_put_last+0x1b/0x80 [i915] kern :warn : [ 22.639467] ____intel_wakeref_put_last+0x1e/0x80 [i915] kern :warn : [ 22.640025] intel_gt_resume+0x244/0x2c0 [i915] kern :warn : [ 22.640521] intel_gt_init+0x146/0x300 [i915] kern :warn : [ 22.640999] i915_gem_init+0x129/0x1c0 [i915] kern :warn : [ 22.641490] i915_driver_probe+0x1b5/0x440 [i915] kern :warn : [ 22.641997] i915_pci_probe+0x54/0x140 [i915] kern :warn : [ 22.642471] local_pci_probe+0x45/0x80 kern :info : [ 22.642479] raid6: sse2x2 gen() 10681 MB/s kern :warn : [ 22.642823] pci_device_probe+0x16b/0x200 kern :warn : [ 22.643532] ? sysfs_do_create_link_sd+0x69/0x100 kern :warn : [ 22.643994] really_probe+0xc0/0x380 kern :warn : [ 22.644370] __driver_probe_device+0xfe/0x180 kern :warn : [ 22.644758] driver_probe_device+0x1e/0xc0 kern :warn : [ 22.645127] __driver_attach+0x9e/0x180 kern :warn : [ 22.645473] ? __device_attach_driver+0x100/0x100 kern :warn : [ 22.645880] ? __device_attach_driver+0x100/0x100 kern :warn : [ 22.646283] bus_for_each_dev+0x7b/0xc0 kern :warn : [ 22.646630] bus_add_driver+0x150/0x200 kern :warn : [ 22.646972] driver_register+0x6c/0xc0 kern :warn : [ 22.647306] i915_init+0x37/0xf4 [i915] kern :warn : [ 22.647745] ? 0xffffffffc0800000 kern :warn : [ 22.648068] do_one_initcall+0x5b/0x340 kern :warn : [ 22.648406] ? do_init_module+0x23/0x280 kern :warn : [ 22.648754] ? kmem_cache_alloc_trace+0x520/0x600 kern :warn : [ 22.649153] ? lock_is_held_type+0xd5/0x140 kern :warn : [ 22.649521] do_init_module+0x5c/0x280 kern :warn : [ 22.649855] load_module+0x11b7/0x1540 kern :warn : [ 22.650214] ? __do_sys_finit_module+0xae/0x140 kern :warn : [ 22.650599] __do_sys_finit_module+0xae/0x140 kern :warn : [ 22.650991] do_syscall_64+0x5c/0x80 kern :warn : [ 22.651313] ? lockdep_hardirqs_on+0x79/0x100 kern :warn : [ 22.651688] ? do_syscall_64+0x69/0x80 kern :warn : [ 22.652019] ? do_syscall_64+0x69/0x80 kern :warn : [ 22.652351] ? lockdep_hardirqs_on+0x79/0x100 kern :warn : [ 22.652724] ? do_syscall_64+0x69/0x80 kern :warn : [ 22.653055] ? asm_exc_page_fault+0x8/0x30 kern :warn : [ 22.653414] ? lockdep_hardirqs_on+0x79/0x100 kern :warn : [ 22.653789] entry_SYSCALL_64_after_hwframe+0x44/0xae kern :warn : [ 22.654213] RIP: 0033:0x7f29cde5cf59 kern :warn : [ 22.654534] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 07 6f 0c 00 f7 d8 64 89 01 48 kern :warn : [ 22.655914] RSP: 002b:00007ffe23342518 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 kern :warn : [ 22.656516] RAX: ffffffffffffffda RBX: 0000561851c9c110 RCX: 00007f29cde5cf59 kern :warn : [ 22.657083] RDX: 0000000000000000 RSI: 00007f29cdd61cad RDI: 0000000000000010 kern :warn : [ 22.657649] RBP: 00007f29cdd61cad R08: 0000000000000000 R09: 0000000000000000 kern :warn : [ 22.658220] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000 kern :warn : [ 22.658787] R13: 0000561851c93f00 R14: 0000000000020000 R15: 0000561851c9c110
To reproduce:
git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state.
--- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks, Oliver Sang