================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. modprobe/7044 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff888073868648 ((work_completion)(&(&host->detect)->work)){+.?.}-{0:0}, at: __flush_work+0x109/0xac0 kernel/workqueue.c:3072 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 process_one_work+0x7ec/0x1160 kernel/workqueue.c:2268 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 irq event stamp: 8202 hardirqs last enabled at (8202): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3156 hardirqs last disabled at (8201): [] try_to_grab_pending+0xfa/0x890 kernel/workqueue.c:1267 softirqs last enabled at (6010): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last enabled at (6010): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last enabled at (6010): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 softirqs last disabled at (8115): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last disabled at (8115): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last disabled at (8115): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 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 *** 1 lock held by modprobe/7044: #0: ffffc90000007bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xcf/0x670 kernel/time/timer.c:1698 stack backtrace: CPU: 0 PID: 7044 Comm: modprobe Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 valid_state+0x13b/0x1d0 kernel/locking/lockdep.c:3974 mark_lock_irq+0xa9/0x900 kernel/locking/lockdep.c:4177 mark_lock+0x208/0x320 kernel/locking/lockdep.c:4633 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0xce0/0x7c40 kernel/locking/lockdep.c:5017 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 __flush_work+0x122/0xac0 kernel/workqueue.c:3072 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3163 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:672 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x291/0x910 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline] RIP: 0010:syscall_enter_from_user_mode+0x2a/0x80 kernel/entry/common.c:118 Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 ed fa ff ff 66 90 66 90 e8 24 9d 57 f7 e8 9f 9b 57 f7 fb 65 48 8b 05 b6 70 d1 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 a1 f1 3d f7 48 RSP: 0018:ffffc900037a7f08 EFLAGS: 00000286 RAX: ffff888079239e00 RBX: 000000000000000a RCX: 7bedd184a7a20d00 RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: ffffffff8adf6220 RBP: ffffc900037a7f48 R08: ffffffff8e21116f R09: 1ffffffff1c4222d R10: dffffc0000000000 R11: fffffbfff1c4222e R12: 0000000000000000 R13: 0000000000000000 R14: ffffc900037a7f58 R15: 0000000000000000 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8557ddf2c7 Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83 RSP: 002b:00007ffcbcc16c48 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007f8557dbcab0 RCX: 00007f8557ddf2c7 RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f8557aec000 RBP: 00007ffcbcc16f10 R08: 0000000000000000 R09: 00007f8557c1b700 R10: 00007f8557dbcab0 R11: 0000000000000206 R12: 0000000000000028 R13: 000000be279c8ae2 R14: 0000000000000000 R15: 00007f8557df3310 BUG: sleeping function called from invalid context at kernel/workqueue.c:3013 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7044, name: modprobe preempt_count: 100, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:434 [inline] [] handle_softirqs+0xfd/0x910 kernel/softirq.c:572 CPU: 0 PID: 7044 Comm: modprobe Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 __might_resched+0x489/0x5f0 kernel/sched/core.c:9970 start_flush_work kernel/workqueue.c:3013 [inline] __flush_work+0x142/0xac0 kernel/workqueue.c:3075 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3163 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:672 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x291/0x910 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline] RIP: 0010:syscall_enter_from_user_mode+0x2a/0x80 kernel/entry/common.c:118 Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 ed fa ff ff 66 90 66 90 e8 24 9d 57 f7 e8 9f 9b 57 f7 fb 65 48 8b 05 b6 70 d1 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 a1 f1 3d f7 48 RSP: 0018:ffffc900037a7f08 EFLAGS: 00000286 RAX: ffff888079239e00 RBX: 000000000000000a RCX: 7bedd184a7a20d00 RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: ffffffff8adf6220 RBP: ffffc900037a7f48 R08: ffffffff8e21116f R09: 1ffffffff1c4222d R10: dffffc0000000000 R11: fffffbfff1c4222e R12: 0000000000000000 R13: 0000000000000000 R14: ffffc900037a7f58 R15: 0000000000000000 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8557ddf2c7 Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83 RSP: 002b:00007ffcbcc16c48 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007f8557dbcab0 RCX: 00007f8557ddf2c7 RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f8557aec000 RBP: 00007ffcbcc16f10 R08: 0000000000000000 R09: 00007f8557c1b700 R10: 00007f8557dbcab0 R11: 0000000000000206 R12: 0000000000000028 R13: 000000be279c8ae2 R14: 0000000000000000 R15: 00007f8557df3310 ODEBUG: object ffffc900000079a0 is NOT on stack ffffc900037a0000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7044 at lib/debugobjects.c:558 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 0 PID: 7044 at lib/debugobjects.c:558 lookup_object_or_alloc lib/debugobjects.c:591 [inline] WARNING: CPU: 0 PID: 7044 at lib/debugobjects.c:558 __debug_object_init+0x18e/0x440 lib/debugobjects.c:672 Modules linked in: CPU: 0 PID: 7044 Comm: modprobe 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:558 [inline] RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:591 [inline] RIP: 0010:__debug_object_init+0x18e/0x440 lib/debugobjects.c:672 Code: 24 04 74 2f 41 ff c6 44 89 35 de 03 de 12 48 c7 c1 c0 6a df 8a 48 c7 c7 20 6b df 8a 84 c0 48 0f 45 f9 48 89 de e8 72 83 0b 06 <0f> 0b eb 05 4c 8b 7c 24 18 4d 8d 65 10 4d 89 e6 49 c1 ee 03 41 0f RSP: 0018:ffffc90000007908 EFLAGS: 00010046 RAX: 0000000000000050 RBX: ffffc900000079a0 RCX: 7bedd184a7a20d00 RDX: 0000000000000100 RSI: 0000000000000101 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffc90000007587 R09: 1ffff92000000eb0 R10: dffffc0000000000 R11: fffff52000000eb1 R12: ffff888079239e20 R13: ffff8880266c5d20 R14: 0000000000000001 R15: ffffffff8a8d30a0 FS: 00007f8557a50c80(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8557c24a90 CR3: 0000000041498000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __synchronize_srcu+0x227/0x350 kernel/rcu/srcutree.c:1241 wakeup_source_remove drivers/base/power/wakeup.c:198 [inline] wakeup_source_unregister+0x112/0x190 drivers/base/power/wakeup.c:242 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:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x217/0x450 lib/kobject.c:729 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x291/0x910 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline] RIP: 0010:syscall_enter_from_user_mode+0x2a/0x80 kernel/entry/common.c:118 Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 ed fa ff ff 66 90 66 90 e8 24 9d 57 f7 e8 9f 9b 57 f7 fb 65 48 8b 05 b6 70 d1 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 a1 f1 3d f7 48 RSP: 0018:ffffc900037a7f08 EFLAGS: 00000286 RAX: ffff888079239e00 RBX: 000000000000000a RCX: 7bedd184a7a20d00 RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: ffffffff8adf6220 RBP: ffffc900037a7f48 R08: ffffffff8e21116f R09: 1ffffffff1c4222d R10: dffffc0000000000 R11: fffffbfff1c4222e R12: 0000000000000000 R13: 0000000000000000 R14: ffffc900037a7f58 R15: 0000000000000000 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8557ddf2c7 Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83 RSP: 002b:00007ffcbcc16c48 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007f8557dbcab0 RCX: 00007f8557ddf2c7 RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f8557aec000 RBP: 00007ffcbcc16f10 R08: 0000000000000000 R09: 00007f8557c1b700 R10: 00007f8557dbcab0 R11: 0000000000000206 R12: 0000000000000028 R13: 000000be279c8ae2 R14: 0000000000000000 R15: 00007f8557df3310 ---------------- Code disassembly (best guess): 0: 41 56 push %r14 2: 53 push %rbx 3: 48 89 f3 mov %rsi,%rbx 6: 49 89 fe mov %rdi,%r14 9: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi e: e8 ed fa ff ff call 0xfffffb00 13: 66 90 xchg %ax,%ax 15: 66 90 xchg %ax,%ax 17: e8 24 9d 57 f7 call 0xf7579d40 1c: e8 9f 9b 57 f7 call 0xf7579bc0 21: fb sti 22: 65 48 8b 05 b6 70 d1 mov %gs:0x75d170b6(%rip),%rax # 0x75d170e0 29: 75 * 2a: 48 8b 70 08 mov 0x8(%rax),%rsi <-- trapping instruction 2e: 40 f6 c6 3f test $0x3f,%sil 32: 74 0b je 0x3f 34: 4c 89 f7 mov %r14,%rdi 37: 5b pop %rbx 38: 41 5e pop %r14 3a: e9 a1 f1 3d f7 jmp 0xf73df1e0 3f: 48 rex.W