ALSA: seq fatal error: cannot create timer (-22) EXT4-fs (loop0): Couldn't mount because of unsupported optional features (34380800) ALSA: seq fatal error: cannot create timer (-22) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7555 Comm: syz-executor1 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa RSP: 0018:ffff8801595c77d0 EFLAGS: 00010203 RAX: 0000000000000002 RBX: 000000000000000a RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 RBP: ffff8801595c7820 R08: ffff8801be67a240 R09: ffffed00375fc6fe R10: ffffed00375fc6fe R11: ffff8801bafe37f7 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000020a00000 R15: ffff8801cb5e7268 FS: 00007f5575448700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 00000001cc572000 CR4: 00000000001426f0 Call Trace: vb2_fop_mmap+0x4b/0x70 drivers/media/common/videobuf2/videobuf2-v4l2.c:999 v4l2_mmap+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:401 call_mmap include/linux/fs.h:1872 [inline] mmap_region+0xe85/0x1cd0 mm/mmap.c:1786 do_mmap+0xa22/0x1230 mm/mmap.c:1559 do_mmap_pgoff include/linux/mm.h:2328 [inline] vm_mmap_pgoff+0x213/0x2c0 mm/util.c:350 ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5575447c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457569 RDX: ffffffffffffffff RSI: 0000000000600000 RDI: 0000000020a00000 RBP: 000000000072bf00 R08: 0000000000000004 R09: 0000000020a00000 R10: 0000000000000011 R11: 0000000000000246 R12: 00007f55754486d4 R13: 00000000004c2a9d R14: 00000000004d41a0 R15: 00000000ffffffff Modules linked in: ---[ end trace c8f8f5027e78e018 ]--- RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa RSP: 0018:ffff8801595c77d0 EFLAGS: 00010203 RAX: 0000000000000002 RBX: 000000000000000a RCX: dffffc0000000000 kobject: 'loop0' (00000000bcd3b1bb): kobject_uevent_env RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 RBP: ffff8801595c7820 R08: ffff8801be67a240 R09: ffffed00375fc6fe R10: ffffed00375fc6fe R11: ffff8801bafe37f7 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000020a00000 R15: ffff8801cb5e7268 FS: 00007f5575448700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop0' (00000000bcd3b1bb): fill_kobj_path: path = '/devices/virtual/block/loop0' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop3' (000000006479d6d1): kobject_uevent_env kobject: 'loop3' (000000006479d6d1): fill_kobj_path: path = '/devices/virtual/block/loop3' ALSA: seq fatal error: cannot create timer (-22) kobject: 'loop5' (00000000a12129f2): kobject_uevent_env kobject: 'loop0' (00000000bcd3b1bb): kobject_uevent_env kobject: 'loop5' (00000000a12129f2): fill_kobj_path: path = '/devices/virtual/block/loop5' ALSA: seq fatal error: cannot create timer (-22) kobject: 'loop0' (00000000bcd3b1bb): fill_kobj_path: path = '/devices/virtual/block/loop0' CR2: 0000000000ecc978 CR3: 00000001cc572000 CR4: 00000000001426e0