================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.0.697/7113 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807ec20710 ((work_completion)(&(&host->detect)->work)){+.?.}-{0:0}, at: __flush_work+0xfa/0x210 kernel/workqueue.c:3090 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __flush_work+0x116/0x210 kernel/workqueue.c:3090 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 __mmc_stop_host drivers/mmc/core/core.c:2294 [inline] mmc_stop_host+0xd5/0x460 drivers/mmc/core/core.c:2299 mmc_remove_host+0x11/0x60 drivers/mmc/core/host.c:642 vub300_disconnect+0x14b/0x2e0 drivers/mmc/host/vub300.c:2382 usb_unbind_interface+0x203/0x870 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1249 [inline] device_release_driver_internal+0x487/0x710 drivers/base/dd.c:1282 bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531 device_del+0x63f/0xa80 drivers/base/core.c:3615 usb_disable_device+0x3e7/0x8a0 drivers/usb/core/message.c:1472 usb_disconnect+0x33c/0x8a0 drivers/usb/core/hub.c:2287 hub_port_connect drivers/usb/core/hub.c:5341 [inline] hub_port_connect_change drivers/usb/core/hub.c:5637 [inline] port_event drivers/usb/core/hub.c:5799 [inline] hub_event+0x1d64/0x5260 drivers/usb/core/hub.c:5881 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 process_scheduled_works kernel/workqueue.c:2373 [inline] worker_thread+0xd93/0x12a0 kernel/workqueue.c:2459 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 irq event stamp: 19166 hardirqs last enabled at (19166): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3174 hardirqs last disabled at (19165): [] try_to_grab_pending+0xfb/0x820 kernel/workqueue.c:1272 softirqs last enabled at (12300): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last enabled at (12300): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last enabled at (12300): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 softirqs last disabled at (19101): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (19101): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last disabled at (19101): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock((work_completion)(&(&host->detect)->work)); lock((work_completion)(&(&host->detect)->work)); *** DEADLOCK *** 2 locks held by syz.0.697/7113: #0: ffff88807a3a3da0 (&u->iolock){+.+.}-{3:3}, at: __unix_dgram_recvmsg+0x1f8/0xd50 net/unix/af_unix.c:2312 #1: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline] #1: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xca/0x540 kernel/time/timer.c:1638 stack backtrace: CPU: 1 PID: 7113 Comm: syz.0.697 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 valid_state+0x13b/0x1d0 kernel/locking/lockdep.c:3932 mark_lock_irq+0xa9/0x900 kernel/locking/lockdep.c:4135 mark_lock+0x208/0x320 kernel/locking/lockdep.c:4591 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0xc63/0x7b50 kernel/locking/lockdep.c:4966 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __flush_work+0x116/0x210 kernel/workqueue.c:3090 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:663 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 1f c1 88 f7 65 8b 05 90 e8 38 76 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900041ff5e0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 8299735d2558a000 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001 RBP: ffffc900041ff670 R08: ffffffff901ee177 R09: 1ffffffff203dc2e R10: dffffc0000000000 R11: fffffbfff203dc2f R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88807a3a3ec0 R15: 1ffff9200083febc spin_unlock_irqrestore include/linux/spinlock.h:419 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x128/0x190 kernel/sched/wait.c:205 __unix_dgram_recvmsg+0x4b1/0xd50 net/unix/af_unix.c:2342 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707 do_recvmmsg+0x360/0x7f0 net/socket.c:2801 __sys_recvmmsg net/socket.c:2880 [inline] __do_sys_recvmmsg net/socket.c:2903 [inline] __se_sys_recvmmsg net/socket.c:2896 [inline] __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2896 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f30e73090d9 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:00007f30e5540028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f30e7591090 RCX: 00007f30e73090d9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f30e73a0024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f30e7591128 R14: 00007f30e7591090 R15: 00007ffe4fd33218 BUG: sleeping function called from invalid context at kernel/workqueue.c:3031 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7113, name: syz.0.697 INFO: lockdep is turned off. Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 7113 Comm: syz.0.697 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 ___might_sleep+0x493/0x610 kernel/sched/core.c:9658 start_flush_work+0x2e/0x830 kernel/workqueue.c:3031 __flush_work+0x148/0x210 kernel/workqueue.c:3093 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:663 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 1f c1 88 f7 65 8b 05 90 e8 38 76 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900041ff5e0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 8299735d2558a000 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001 RBP: ffffc900041ff670 R08: ffffffff901ee177 R09: 1ffffffff203dc2e R10: dffffc0000000000 R11: fffffbfff203dc2f R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88807a3a3ec0 R15: 1ffff9200083febc spin_unlock_irqrestore include/linux/spinlock.h:419 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x128/0x190 kernel/sched/wait.c:205 __unix_dgram_recvmsg+0x4b1/0xd50 net/unix/af_unix.c:2342 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707 do_recvmmsg+0x360/0x7f0 net/socket.c:2801 __sys_recvmmsg net/socket.c:2880 [inline] __do_sys_recvmmsg net/socket.c:2903 [inline] __se_sys_recvmmsg net/socket.c:2896 [inline] __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2896 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f30e73090d9 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:00007f30e5540028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f30e7591090 RCX: 00007f30e73090d9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f30e73a0024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f30e7591128 R14: 00007f30e7591090 R15: 00007ffe4fd33218 ODEBUG: object ffffc90000dd09a0 is NOT on stack ffffc900041f8000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7113 at lib/debugobjects.c:561 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 7113 at lib/debugobjects.c:561 lookup_object_or_alloc lib/debugobjects.c:594 [inline] WARNING: CPU: 1 PID: 7113 at lib/debugobjects.c:561 __debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Modules linked in: CPU: 1 PID: 7113 Comm: syz.0.697 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:561 [inline] RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:594 [inline] RIP: 0010:__debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Code: d6 2d 73 12 48 c7 c1 00 4a 7a 8a 48 c7 c7 60 4a 7a 8a 84 c0 48 0f 45 f9 4c 89 ee e8 ea b7 c8 05 48 be 00 00 00 00 00 fc ff df <0f> 0b e9 4d fd ff ff 83 3d 02 2d 73 12 00 4c 89 6c 24 28 0f 84 23 RSP: 0018:ffffc90000dd07e0 EFLAGS: 00010046 RAX: 0000000000000050 RBX: 0000000000000001 RCX: 8299735d2558a000 RDX: 0000000000000100 RSI: dffffc0000000000 RDI: 0000000000000000 RBP: ffffc90000dd0950 R08: ffff8880b9133d7f R09: 1ffff110172267af R10: dffffc0000000000 R11: ffffed10172267b0 R12: f8f8f8f8f8f8f8f8 R13: ffffc90000dd09a0 R14: ffff88807b4ebba0 R15: ffff88805f608508 FS: 00007f30e55406c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000019030 CR3: 0000000029c5a000 CR4: 00000000003526e0 Call Trace: __synchronize_srcu+0x229/0x350 kernel/rcu/srcutree.c:928 wakeup_source_remove drivers/base/power/wakeup.c:203 [inline] wakeup_source_unregister+0x112/0x190 drivers/base/power/wakeup.c:247 mmc_host_classdev_release+0x43/0xf0 drivers/mmc/core/host.c:77 device_release+0x92/0x1c0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x217/0x450 lib/kobject.c:761 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194 Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 1f c1 88 f7 65 8b 05 90 e8 38 76 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900041ff5e0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 8299735d2558a000 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001 RBP: ffffc900041ff670 R08: ffffffff901ee177 R09: 1ffffffff203dc2e R10: dffffc0000000000 R11: fffffbfff203dc2f R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88807a3a3ec0 R15: 1ffff9200083febc spin_unlock_irqrestore include/linux/spinlock.h:419 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x128/0x190 kernel/sched/wait.c:205 __unix_dgram_recvmsg+0x4b1/0xd50 net/unix/af_unix.c:2342 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707 do_recvmmsg+0x360/0x7f0 net/socket.c:2801 __sys_recvmmsg net/socket.c:2880 [inline] __do_sys_recvmmsg net/socket.c:2903 [inline] __se_sys_recvmmsg net/socket.c:2896 [inline] __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2896 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f30e73090d9 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:00007f30e5540028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f30e7591090 RCX: 00007f30e73090d9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f30e73a0024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f30e7591128 R14: 00007f30e7591090 R15: 00007ffe4fd33218 ---------------- Code disassembly (best guess): 0: c7 44 24 20 00 00 00 movl $0x0,0x20(%rsp) 7: 00 8: 9c pushf 9: 8f 44 24 20 pop 0x20(%rsp) d: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp) 14: 00 15: 41 c6 04 07 f8 movb $0xf8,(%r15,%rax,1) 1a: 75 4b jne 0x67 1c: f7 c3 00 02 00 00 test $0x200,%ebx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 1f c1 88 f7 call 0xf788c14e <-- trapping instruction 2f: 65 8b 05 90 e8 38 76 mov %gs:0x7638e890(%rip),%eax # 0x7638e8c6 36: 85 c0 test %eax,%eax 38: 74 3c je 0x76 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss