Looks like the work queue function for i915 driver is borked and is jumping to the wrong address.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1870242 Title: Kernel oops in i915 on 5.4.0-18-generic Status in linux package in Ubuntu: Confirmed Status in linux source package in Focal: Confirmed Bug description: I was running 5.4.0-18-generic and got the following splat doing nothing interesting in particular: BUG: unable to handle page fault for address: ffffffff84abf450 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 4d420e067 P4D 4d420e067 PUD 4d420f063 PMD 0 Oops: 0010 [#1] SMP CPU: 11 PID: 1114 Comm: kworker/11:3 Tainted: P U O 5.4.0-18-generic #22 Hardware name: Dell Inc. Precision 5540/0FMYX6, BIOS 1.5.0 12/25/2019 Workqueue: events __intel_wakeref_put_work [i915] RIP: 0010:0xffffffff84abf450 Code: Bad RIP value. RSP: 0018:ffffad7380757cc0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff89ebc46a6d98 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff89ebc46a6d98 RBP: ffffad7380757d40 R08: ffff89ebd88eeb58 R09: ffff89ebd88eec28 R10: 0000000000000000 R11: ffffffffac065868 R12: ffff89ebc46a6d98 R13: 0000000000000000 R14: 0000000000000001 R15: ffff89ebd00283c0 FS: 0000000000000000(0000) GS:ffff89ebdc2c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff84abf426 CR3: 00000004d420a002 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ? __flush_work+0x51/0x1d0 ? wake_up_process+0x15/0x20 __cancel_work_timer+0x10e/0x190 ? _cond_resched+0x19/0x30 ? synchronize_irq+0x3e/0xb0 cancel_work_sync+0x10/0x20 gen6_disable_rps_interrupts+0xa0/0xd0 [i915] gen6_rps_idle+0x1f/0xf0 [i915] __gt_park+0x93/0xa0 [i915] ____intel_wakeref_put_last+0x1f/0x50 [i915] __intel_wakeref_put_work+0x37/0x40 [i915] process_one_work+0x1eb/0x3b0 worker_thread+0x4d/0x400 kthread+0x104/0x140 ? process_one_work+0x3b0/0x3b0 ? kthread_park+0x90/0x90 ret_from_fork+0x1f/0x40 I looked through the differences between 5.4.0-18 and the tip of master-next for focal ("UBUNTU: upstream stable to v5.4.29"), and there are no new changes to i915 that could've fixed this. I've filed a bug with Intel, since this doesn't seem to be Ubuntu- specific: https://gitlab.freedesktop.org/drm/intel/issues/1597 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1870242/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
