------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#1: syz.3.3828/18939 WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#1: syz.3.3828/18939 Modules linked in: CPU: 1 UID: 0 PID: 18939 Comm: syz.3.3828 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline] RIP: 0010:__mutex_lock+0x1331/0x15a0 kernel/locking/mutex.c:821 Code: 99 7a 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 63 b7 8e 05 00 75 13 48 8d 3d 86 b5 91 05 48 c7 c6 e0 20 0d 8c <67> 48 0f b9 3a 90 e9 1d ee ff ff 90 0f 0b 90 e9 f0 f1 ff ff 90 0f RSP: 0018:ffffc900038df6a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888035dc3e80 RDX: 0000000000000000 RSI: ffffffff8c0d20e0 RDI: ffffffff917d97f0 RBP: ffffc900038df840 R08: ffffffff917a99c3 R09: 1ffffffff22f5338 R10: dffffc0000000000 R11: fffffbfff22f5339 R12: ffff8880202d6010 R13: 0000000000000000 R14: 1ffff9200071bee8 R15: 0000000000000000 FS: 00007fcb9a46d6c0(0000) GS:ffff888123bb1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb9a46cff8 CR3: 000000006d900000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: as102_stream_ctrl+0x27/0xc0 drivers/media/usb/as102/as102_drv.c:259 __dvb_frontend_open+0x2e9/0xca0 drivers/media/dvb-core/dvb_frontend.c:2772 dvb_device_open+0x24f/0x340 drivers/media/dvb-core/dvbdev.c:109 chrdev_open+0x4d9/0x600 fs/char_dev.c:413 do_dentry_open+0x80e/0x1360 fs/open.c:1000 vfs_open_consume+0x4a/0x350 fs/open.c:1131 do_open fs/namei.c:4845 [inline] path_openat+0x1700/0x20f0 fs/namei.c:5010 do_file_open+0x23e/0x4a0 fs/namei.c:5039 do_sys_openat2+0x115/0x200 fs/open.c:1442 do_sys_open fs/open.c:1448 [inline] __do_sys_openat fs/open.c:1464 [inline] __se_sys_openat fs/open.c:1459 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1459 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcb9955fd8e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007fcb9a46cb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fcb9a46d6c0 RCX: 00007fcb9955fd8e RDX: 0000000000000802 RSI: 00007fcb9a46cc00 RDI: ffffffffffffff9c RBP: 00007fcb9a46cc00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007fcb99826218 R14: 00007fcb99826180 R15: 00007fcb9994fa48 ---------------- Code disassembly (best guess): 0: 99 cltd 1: 7a 91 jp 0xffffff94 3: 48 c1 e8 03 shr $0x3,%rax 7: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax b: 84 c0 test %al,%al d: 0f 85 46 02 00 00 jne 0x259 13: 83 3d 63 b7 8e 05 00 cmpl $0x0,0x58eb763(%rip) # 0x58eb77d 1a: 75 13 jne 0x2f 1c: 48 8d 3d 86 b5 91 05 lea 0x591b586(%rip),%rdi # 0x591b5a9 23: 48 c7 c6 e0 20 0d 8c mov $0xffffffff8c0d20e0,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 90 nop 30: e9 1d ee ff ff jmp 0xffffee52 35: 90 nop 36: 0f 0b ud2 38: 90 nop 39: e9 f0 f1 ff ff jmp 0xfffff22e 3e: 90 nop 3f: 0f .byte 0xf