WARNING in as102_dvb_dmx_start_feed

Status: upstream: reported C repro on 2026/03/26 05:44
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+0d6f3f8513075f9587d8@syzkaller.appspotmail.com
First crash: 221d, last: 5h22m
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/03/27 upstream (ToT) 46b513250491 C [report] WARNING in as102_dvb_dmx_start_feed
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in as102_dvb_dmx_start_feed prio:high usb media -1 syz, C error error 2525 1h00m 221d 0/29 upstream: reported C repro on 2026/03/26 05:13
linux-6.1 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 140 1d21h 220d 0/3 upstream: reported C repro on 2026/03/26 09:14
linux-5.15 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 89 18h23m 221d 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: 0 PID: 5980 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 0 PID: 5980 at kernel/locking/mutex.c:582 __mutex_lock+0xb85/0xcc0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 0 PID: 5980 Comm: syz.2.36 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xb85/0xcc0 kernel/locking/mutex.c:747
Code: 04 08 84 c0 0f 85 27 01 00 00 83 3d 94 87 fc 03 00 0f 85 95 f5 ff ff 48 c7 c7 80 b4 ca 8a 48 c7 c6 20 b5 ca 8a e8 5b 28 c2 f6 <0f> 0b e9 7b f5 ff ff 0f 0b e9 5f f9 ff ff 0f 0b e9 18 f6 ff ff e8
RSP: 0018:ffffc90003a07aa0 EFLAGS: 00010246
RAX: 9e93a6400bc6fc00 RBX: ffff88802fc44ce0 RCX: ffff888023bdbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90003a07bf8 R08: ffff8880b8e28c13 R09: 1ffff110171c5182
R10: dffffc0000000000 R11: ffffed10171c5183 R12: 0000000000000000
R13: 1ffff92000740f64 R14: dffffc0000000000 R15: 0000000000000000
FS:  000055557b49d500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005e182000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x70/0x280 drivers/media/usb/as102/as102_drv.c:139
 dmx_section_feed_start_filtering+0x4f5/0x690 drivers/media/dvb-core/dvb_demux.c:973
 dvb_dmxdev_filter_start+0xcbd/0x10c0 drivers/media/dvb-core/dmxdev.c:758
 dvb_demux_do_ioctl+0x467/0x530 drivers/media/dvb-core/dmxdev.c:1069
 dvb_usercopy+0x195/0x2b0 drivers/media/dvb-core/dvbdev.c:999
 dvb_demux_ioctl+0x29/0x30 drivers/media/dvb-core/dmxdev.c:1187
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f046a19c799
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:00007ffe0dcb0a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f046a415fa0 RCX: 00007f046a19c799
RDX: 0000200000000000 RSI: 00000000403c6f2b RDI: 0000000000000004
RBP: 00007f046a232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f046a415fac R14: 00007f046a415fa0 R15: 00007f046a415fa0
 </TASK>

Crashes (158):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/03/26 23:47 linux-6.6.y c09fbcd31ae6 766b6434 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/11/02 02:28 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/11/01 04:09 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/11/01 02:43 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/31 11:16 linux-6.6.y b5a1dc3ad482 2041d3f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/31 09:51 linux-6.6.y b5a1dc3ad482 2041d3f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/31 01:04 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/30 07:09 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/29 18:32 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/29 12:50 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/29 12:39 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/26 10:17 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/26 06:07 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/24 00:01 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/23 19:50 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/23 08:37 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/22 05:21 linux-6.6.y 0aebf2870d53 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/19 16:54 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/18 00:17 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/17 01:36 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/15 14:57 linux-6.6.y cecd39af8a1a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/15 02:41 linux-6.6.y a91a6aa9253c 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/14 13:22 linux-6.6.y a91a6aa9253c 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/13 22:37 linux-6.6.y a91a6aa9253c 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/13 22:36 linux-6.6.y a91a6aa9253c 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/13 07:56 linux-6.6.y a91a6aa9253c 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/12 06:01 linux-6.6.y a91a6aa9253c 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/08 07:37 linux-6.6.y a91a6aa9253c 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/07 18:55 linux-6.6.y a91a6aa9253c 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/10/03 15:03 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/29 20:26 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/29 18:34 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/29 07:17 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/29 04:08 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/29 01:42 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/26 08:40 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/26 04:55 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/25 12:55 linux-6.6.y 79643295eba1 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 13:27 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 05:13 linux-6.6.y 79643295eba1 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/22 05:38 linux-6.6.y 79643295eba1 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/17 18:00 linux-6.6.y 79643295eba1 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/16 13:57 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/29 13:22 linux-6.6.y 142cd8382222 7ca9e4d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/28 22:24 linux-6.6.y 142cd8382222 95008c03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 05:43 linux-6.6.y c09fbcd31ae6 c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in as102_dvb_dmx_start_feed
* Struck through repros no longer work on HEAD.