------------[ 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#0: syz.0.645/7973 WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0xd0c/0xf14 kernel/locking/mutex.c:821, CPU#0: syz.0.645/7973 Modules linked in: CPU: 0 UID: 0 PID: 7973 Comm: syz.0.645 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __mutex_lock_common kernel/locking/mutex.c:625 [inline] pc : __mutex_lock+0xd0c/0xf14 kernel/locking/mutex.c:821 lr : __mutex_lock_common kernel/locking/mutex.c:625 [inline] lr : __mutex_lock+0xd0c/0xf14 kernel/locking/mutex.c:821 sp : ffff8000949e76a0 x29: ffff8000949e77f0 x28: ffff800083dbc1c8 x27: ffff8000949e7740 x26: 0000000000000000 x25: ffff8000949e7748 x24: 0000000000000000 x23: ffff70001293cee4 x22: ffff8000949e7760 x21: dfff800000000000 x20: ffff0000cb8901a0 x19: ffff0000cb891138 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080156070 x10: 0000000000000003 x9 : cd7e8c9dd7c9d100 x8 : cd7e8c9dd7c9d100 x7 : 0000000000000000 x6 : ffff8000803b6ef8 x5 : 0000000000000000 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000000 x1 : ffff0000c9961d40 x0 : 0000000000000001 Call trace: __mutex_lock_common kernel/locking/mutex.c:625 [inline] (P) __mutex_lock+0xd0c/0xf14 kernel/locking/mutex.c:821 (P) mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 vidtv_start_feed+0xf8/0x49c drivers/media/test-drivers/vidtv/vidtv_bridge.c:233 dmx_ts_feed_start_filtering+0x124/0x1fc drivers/media/dvb-core/dvb_demux.c:747 dvb_dmxdev_start_feed+0x1f4/0x2dc drivers/media/dvb-core/dmxdev.c:658 dvb_dmxdev_filter_start+0x1bc/0xa8c drivers/media/dvb-core/dmxdev.c:769 dvb_dmxdev_pes_filter_set+0x3d8/0x508 drivers/media/dvb-core/dmxdev.c:978 dvb_demux_do_ioctl+0x40c/0x4bc drivers/media/dvb-core/dmxdev.c:1092 dvb_usercopy+0x2a4/0x4d4 drivers/media/dvb-core/dvbdev.c:996 dvb_demux_ioctl+0x3c/0x54 drivers/media/dvb-core/dmxdev.c:1201 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 239 hardirqs last enabled at (239): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:187 [inline] hardirqs last enabled at (239): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:206 hardirqs last disabled at (238): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:140 [inline] hardirqs last disabled at (238): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:174 softirqs last enabled at (202): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (202): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (202): [] fpsimd_restore_current_state+0x39c/0x9c8 arch/arm64/kernel/fpsimd.c:1797 softirqs last disabled at (200): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (200): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (200): [] fpsimd_restore_current_state+0x44/0x9c8 arch/arm64/kernel/fpsimd.c:1790 ---[ end trace 0000000000000000 ]---