[UDL] NULL pointer dereference in udl_driver_unload->drm_vblank_cleanup

[Thomas Meyer]

Dez 08 22:21:08 localhost.localdomain kernel: Restarting tasks ... done.
Dez 08 22:21:08 localhost.localdomain kernel: video LNXVIDEO:00: Restoring backlight state
Dez 08 22:21:08 localhost.localdomain kernel: BUG: unable to handle kernel NULL pointer dereference at           (null)
Dez 08 22:21:12 localhost.localdomain kernel: IP: [<          (null)>]           (null)
Dez 08 22:21:12 localhost.localdomain kernel: PGD 235638067 PUD 235284067 PMD 0 
Dez 08 22:21:12 localhost.localdomain kernel: Oops: 0010 [#1] PREEMPT SMP 
Dez 08 22:21:12 localhost.localdomain kernel: Modules linked in: bluetooth fuse ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv
Dez 08 22:21:12 localhost.localdomain kernel: CPU: 0 PID: 984 Comm: Xorg.bin Not tainted 3.18.0-rc6-00565-g3314bf6 #171
Dez 08 22:21:12 localhost.localdomain kernel: Hardware name: Acer Aspire 1810T/JM11-MS, BIOS v1.3310 03/25/2010
Dez 08 22:21:12 localhost.localdomain kernel: task: ffff8802360dd330 ti: ffff8800b49dc000 task.ti: ffff8800b49dc000
Dez 08 22:21:12 localhost.localdomain kernel: RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
Dez 08 22:21:12 localhost.localdomain kernel: RSP: 0018:ffff8800b49dfcf0  EFLAGS: 00010046
Dez 08 22:21:12 localhost.localdomain kernel: RAX: ffffffffc0187140 RBX: 0000000000000000 RCX: 0000000000000000
Dez 08 22:21:12 localhost.localdomain kernel: RDX: 00000000000a0eb2 RSI: 0000000000000000 RDI: ffff88009d41d000
Dez 08 22:21:12 localhost.localdomain kernel: RBP: ffff8800b49dfd78 R08: 000000008baf7fc7 R09: 0000000000000000
Dez 08 22:21:12 localhost.localdomain kernel: R10: 0000000000000000 R11: 0000000000000246 R12: ffff880190380dc0
Dez 08 22:21:12 localhost.localdomain kernel: R13: 0000000000000003 R14: ffff88009d41d000 R15: ffff88009693fac8
Dez 08 22:21:12 localhost.localdomain kernel: FS:  00007f4fd62409c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
Dez 08 22:21:12 localhost.localdomain kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Dez 08 22:21:12 localhost.localdomain kernel: CR2: 0000000000000000 CR3: 0000000234c74000 CR4: 00000000000407f0
Dez 08 22:21:12 localhost.localdomain kernel: Stack:
Dez 08 22:21:12 localhost.localdomain kernel:  ffffffff813dc235 ffff8800b49dfd28 0000000000000000 0000000000000086
Dez 08 22:21:12 localhost.localdomain kernel:  ffff88009d41d188 ffff8800b49dfd30 0000000000000282 ffff8800b49dfd58
Dez 08 22:21:12 localhost.localdomain kernel:  000000000003f519 00000000000a0eb2 00000000c36727a9 ffff880190380e00
Dez 08 22:21:12 localhost.localdomain kernel: Call Trace:
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff813dc235>] ? vblank_disable_and_save+0x95/0x1f0
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff813ddc2d>] drm_vblank_cleanup+0x5d/0xa0
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffffc01842b3>] udl_driver_unload+0x13/0x50 [udl]
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff813df488>] drm_dev_unregister+0x28/0xb0
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff813dfb62>] drm_put_dev+0x22/0x80
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff813d9eaf>] drm_release+0x33f/0x520
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff8117b4d6>] __fput+0xc6/0x1e0
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff8117b639>] ____fput+0x9/0x10
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff8106d1e7>] task_work_run+0x97/0xd0
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff81003d19>] do_notify_resume+0x59/0x80
Dez 08 22:21:12 localhost.localdomain kernel:  [<ffffffff81693dbf>] int_signal+0x12/0x17
Dez 08 22:21:12 localhost.localdomain kernel: Code:  Bad RIP value.
Dez 08 22:21:12 localhost.localdomain kernel: RIP  [<          (null)>]           (null)
Dez 08 22:21:12 localhost.localdomain kernel:  RSP <ffff8800b49dfcf0>
Dez 08 22:21:12 localhost.localdomain kernel: CR2: 0000000000000000
Dez 08 22:21:12 localhost.localdomain kernel: ---[ end trace da2688dc2851fa3a ]---
Dez 08 22:21:12 localhost.localdomain kernel: note: Xorg.bin[984] exited with preempt_count 2