Increasing the CC list a bit, as i915 didn't really get much churn rc6->rc7, but mm/gup.c did, and mm has had a lot of recent changes. On Mon, Sep 28, 2020 at 11:39 AM Jason A. Donenfeld <Jason@xxxxxxxxx> wrote: > > Seeing a new crash in 5.9-rc7 I didn't have in 5.9-rc6: > > [ 1311.596896] BUG: kernel NULL pointer dereference, address: 0000000000000064 > [ 1311.596898] #PF: supervisor write access in kernel mode > [ 1311.596899] #PF: error_code(0x0002) - not-present page > [ 1311.596899] PGD 0 P4D 0 > [ 1311.596901] Oops: 0002 [#1] SMP > [ 1311.596902] CPU: 10 PID: 1431 Comm: kworker/u33:1 Tainted: P S U > O 5.9.0-rc7+ #140 > [ 1311.596903] Hardware name: LENOVO 20QTCTO1WW/20QTCTO1WW, BIOS > N2OET47W (1.34 ) 08/06/2020 > [ 1311.596955] Workqueue: i915-userptr-acquire > __i915_gem_userptr_get_pages_worker [i915] > [ 1311.596959] RIP: 0010:__get_user_pages_remote+0xd7/0x310 > [ 1311.596960] Code: f5 01 00 00 83 7d 00 01 0f 85 ed 01 00 00 f7 c1 > 00 00 04 00 0f 84 58 01 00 00 65 48 8b 04 25 00 6d 01 00 48 8b 80 40 > 03 00 00 <c7> 40 64 01 00 00 00 65 48 8b 04 25 00 6d 01 00 48 c7 44 24 > 18 00 > [ 1311.596961] RSP: 0018:ffff888fdfe47de0 EFLAGS: 00010206 > [ 1311.596962] RAX: 0000000000000000 RBX: 00007fe188531000 RCX: 0000000000040001 > [ 1311.596962] RDX: 0000000000000001 RSI: 00007fe188531000 RDI: ffff888ff0748f00 > [ 1311.596963] RBP: ffff888fdfe47e54 R08: ffff888fedc7d7c8 R09: 0000000000000000 > [ 1311.596963] R10: 0000000000000018 R11: fefefefefefefeff R12: ffff888ff0748f00 > [ 1311.596963] R13: ffff888fedc7d7c8 R14: ffff888f81fe3a40 R15: 0000000000042003 > [ 1311.596964] FS: 0000000000000000(0000) GS:ffff888ffc480000(0000) > knlGS:0000000000000000 > [ 1311.596965] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 1311.596965] CR2: 0000000000000064 CR3: 0000000002009003 CR4: 00000000003706e0 > [ 1311.596966] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 1311.596966] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ 1311.596967] Call Trace: > [ 1311.596993] __i915_gem_userptr_get_pages_worker+0xc8/0x260 [i915] > [ 1311.596996] process_one_work+0x1ca/0x390 > [ 1311.596997] worker_thread+0x48/0x3c0 > [ 1311.596998] ? rescuer_thread+0x3d0/0x3d0 > [ 1311.597000] kthread+0x114/0x130 > [ 1311.597001] ? kthread_create_worker_on_cpu+0x40/0x40 > [ 1311.597003] ret_from_fork+0x1f/0x30 > [ 1311.597031] CR2: 0000000000000064 > [ 1311.597033] ---[ end trace e2b8ddde994a6f6d ]--- _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
