WARNING in as102_dvb_dmx_start_feed

Status: upstream: reported C repro on 2026/03/26 09:14
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ecc90960c3d0af1ddfbb@syzkaller.appspotmail.com
First crash: 216d, last: 2d02h
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/03/28 upstream (ToT) 26df51adf30b C [report] WARNING in as102_dvb_dmx_start_feed
2026/09/30 upstream (ToT) [unknown] C Failed due to an error; will retry later
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 138 2d06h 216d 0/2 upstream: reported C repro on 2026/03/26 05:44
upstream WARNING in as102_dvb_dmx_start_feed prio:high usb media -1 syz, C error error 2443 now 216d 0/29 upstream: reported C repro on 2026/03/26 05:13
linux-5.15 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 86 18h29m 216d 0/3 upstream: reported C repro on 2026/03/25 18:11

Sample crash report:
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 1 PID: 4562 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 1 PID: 4562 at kernel/locking/mutex.c:582 __mutex_lock+0xa1c/0xae0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 1 PID: 4562 Comm: syz.4.76 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xa1c/0xae0 kernel/locking/mutex.c:747
Code: 04 20 84 c0 0f 85 b3 00 00 00 83 3d 65 5b e5 03 00 0f 85 f5 f6 ff ff 48 c7 c7 20 03 8c 8a 48 c7 c6 c0 03 8c 8a e8 e4 2b 12 f7 <0f> 0b e9 db f6 ff ff 0f 0b e9 89 f9 ff ff 48 c7 c1 40 61 c1 96 80
RSP: 0018:ffffc90003327ac0 EFLAGS: 00010246
RAX: 19d5185042794e00 RBX: ffff88802031ace0 RCX: ffff88802b7f3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90003327c20 R08: ffff8880b8e279db R09: 1ffff110171c4f3b
R10: dffffc0000000000 R11: ffffed10171c4f3c R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802031a000 R15: 0000000000000000
FS:  0000555583cc6500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e771eb840 CR3: 0000000079341000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x6c/0x280 drivers/media/usb/as102/as102_drv.c:139
 dmx_ts_feed_start_filtering+0x11c/0x210 drivers/media/dvb-core/dvb_demux.c:747
 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:656 [inline]
 dvb_dmxdev_filter_start+0x422/0x1060 drivers/media/dvb-core/dmxdev.c:767
 dvb_demux_do_ioctl+0x47e/0x530 drivers/media/dvb-core/dmxdev.c:1078
 dvb_usercopy+0x191/0x2b0 drivers/media/dvb-core/dvbdev.c:1007
 dvb_demux_ioctl+0x25/0x30 drivers/media/dvb-core/dmxdev.c:1187
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f05b539e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd65c71a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05b5625fa0 RCX: 00007f05b539e159
RDX: 0000200000000040 RSI: 0000000040146f2c RDI: 0000000000000004
RBP: 00007f05b543506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05b5625fac R14: 00007f05b5625fa0 R15: 00007f05b5625fa0
 </TASK>

Crashes (132):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/17 08:25 linux-6.1.y 1a8763b93150 95928915 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 09:54 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/26 14:15 linux-6.1.y 79807e970724 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/26 01:42 linux-6.1.y 79807e970724 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/23 12:46 linux-6.1.y 79807e970724 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/22 22:59 linux-6.1.y 79807e970724 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/22 22:59 linux-6.1.y 79807e970724 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/22 08:19 linux-6.1.y 79807e970724 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/21 17:39 linux-6.1.y 79807e970724 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/20 16:58 linux-6.1.y 79807e970724 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/19 16:36 linux-6.1.y 79807e970724 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/19 07:44 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/18 01:26 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/17 23:15 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/17 23:12 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/15 10:53 linux-6.1.y a500ba24937a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/14 17:04 linux-6.1.y a500ba24937a 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/13 23:16 linux-6.1.y a500ba24937a 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/10 14:31 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/10 02:09 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/08 21:29 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/08 06:36 linux-6.1.y a500ba24937a 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/08 05:20 linux-6.1.y a500ba24937a 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/07 19:54 linux-6.1.y a500ba24937a 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/01 02:49 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/30 19:24 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/30 19:24 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/30 07:14 linux-6.1.y 1a8763b93150 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/28 04:54 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/26 08:25 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/26 04:43 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/25 15:27 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/25 11:34 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/25 07:10 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/25 03:12 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/24 13:45 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/24 09:12 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/24 04:10 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 06:30 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 06:26 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 00:59 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/22 20:37 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/22 05:28 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/21 20:48 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 09:13 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
* Struck through repros no longer work on HEAD.