syzbot

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DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 1 PID: 4476 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 1 PID: 4476 at kernel/locking/mutex.c:582 __mutex_lock+0xa32/0xaf0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 1 PID: 4476 Comm: syz.0.17 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+0xa32/0xaf0 kernel/locking/mutex.c:747
Code: 04 28 84 c0 0f 85 b7 00 00 00 83 3d 9f 4b e9 03 00 0f 85 df f6 ff ff 48 c7 c7 20 fb 8b 8a 48 c7 c6 c0 fb 8b 8a e8 0e 1d 17 f7 <0f> 0b e9 c5 f6 ff ff 0f 0b e9 6b f9 ff ff 48 c7 c1 40 e1 bf 96 80
RSP: 0018:ffffc90003447aa0 EFLAGS: 00010246
RAX: 122915d99e9ed300 RBX: ffff888075742ce0 RCX: ffff88801f2abb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90003447bf8 R08: ffff8880b8f279db R09: 1ffff110171e4f3b
R10: dffffc0000000000 R11: ffffed10171e4f3c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888075742000 R15: 0000000000000000
FS:  000055558c599500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001ff5a000 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_section_feed_start_filtering+0x4f1/0x690 drivers/media/dvb-core/dvb_demux.c:973
 dvb_dmxdev_filter_start+0xc87/0x1090 drivers/media/dvb-core/dmxdev.c:758
 dvb_demux_do_ioctl+0x463/0x530 drivers/media/dvb-core/dmxdev.c:1069
 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: 0033:0x7f3cc3d9c799
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:00007ffe6a9a02e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3cc4015fa0 RCX: 00007f3cc3d9c799
RDX: 0000200000000200 RSI: 00000000403c6f2b RDI: 0000000000000004
RBP: 00007f3cc3e32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3cc4015fac R14: 00007f3cc4015fa0 R15: 00007f3cc4015fa0
 </TASK>