https://bugzilla.suse.com/show_bug.cgi?id=1190093 https://bugzilla.suse.com/show_bug.cgi?id=1190093#c1 --- Comment #1 from Jiri Slaby --- (In reply to Jiri Slaby from comment #0)

panic.

(FTR: derived from blinking caps lock led. And panic=2 makes the machine reboot quite instantly.) -- You are receiving this mail because: You are on the CC list for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1190093 https://bugzilla.suse.com/show_bug.cgi?id=1190093#c3 --- Comment #3 from Jiri Slaby --- Reported upstream: https://lore.kernel.org/all/67d601c9-8f95-cb10-40df-4d962ec6f9ba@kernel.org/ -- You are receiving this mail because: You are on the CC list for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1190093 https://bugzilla.suse.com/show_bug.cgi?id=1190093#c5 --- Comment #5 from Takashi Iwai --- So, care to submit the fix to SLE15-SP4/for-next, too? -- You are receiving this mail because: You are on the CC list for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1190093 https://bugzilla.suse.com/show_bug.cgi?id=1190093#c8 Jiri Slaby changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #8 from Jiri Slaby ---

BUG: kernel NULL pointer dereference, address: 0000000000000428 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 3 PID: 9698 Comm: kworker/u8:8 Kdump: loaded Not tainted 5.14.0-1.gdc06e24-default #1 openSUSE Tumbleweed (unreleased) 0db17d91eb25d13cad5ace6687cd8bc952dc29d3 Hardware name: Dell Inc. Latitude 7280/0KK5D1, BIOS 1.16.1 10/03/2019 Workqueue: events_unbound async_run_entry_fn RIP: 0010:hrtimer_active+0x5/0x40 Code: d1 48 8d 3c 16 4c 01 d2 49 89 78 18 48 89 fe 49 89 d2 49 89 50 20 49 39 fb 7d 04 c3 0f 0b c3 48 83 c0 01 eb 98 0f 1f 44 00 00 <48> 8b 57 30 8b 42 10 a8 01 74 09 f3 90 8b 42 10 a8 01 75 f7 80 7f RSP: 0000:ffffb7cc837ebc78 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000000003f8 RCX: 000000000158a204 RDX: ffff8e63be521280 RSI: 0000000000000000 RDI: 00000000000003f8 RBP: ffff8e6046e6ea00 R08: 000000000000000f R09: 0000000000000000 R10: ffff8e60d8dfdf01 R11: 0000000000000000 R12: ffff8e604ab9b000 R13: ffff8e604ab9b358 R14: 0000000000000002 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8e63be580000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000428 CR3: 000000047cc10005 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_cancel+0x11/0x40 watchdog_cdev_unregister+0x92/0xe0 watchdog_unregister_device+0x4e/0xe0 mei_wdt_remove+0x59/0xd0 [mei_wdt 544586a9e1951b9111a05508f4aa01c244e4d749] mei_cl_device_remove+0x22/0x90 [mei 74f17d37dc3b283a8402706fa76f8a3ddbb59c6c] __device_release_driver+0x17a/0x230 device_release_driver+0x24/0x30 mei_cl_bus_remove_devices+0x5b/0x70 [mei 74f17d37dc3b283a8402706fa76f8a3ddbb59c6c] mei_stop+0x3c/0xf0 [mei 74f17d37dc3b283a8402706fa76f8a3ddbb59c6c] mei_me_pci_suspend+0x26/0x80 [mei_me 844d2501e9b5802ee255d5a7462d42dd8e37258a] pci_pm_suspend+0x74/0x160 dpm_run_callback+0x49/0x120 __device_suspend+0x18e/0x540 async_suspend+0x1b/0x90 async_run_entry_fn+0x2e/0x110 process_one_work+0x1df/0x380 worker_thread+0x50/0x410 kthread+0x127/0x150 ret_from_fork+0x22/0x30

This fix is in -next already: commit c7b178dae139f8857edc50888cfbf251cd974a38 Author: Curtis Klein Date: Tue Jun 22 23:26:23 2021 -0700 watchdog: Fix NULL pointer dereference when releasing cdev -- You are receiving this mail because: You are on the CC list for the bug.