================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/1:17/4655 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff888077758710 ((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 process_one_work+0x7ba/0xff0 kernel/workqueue.c:2286 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 irq event stamp: 76218 hardirqs last enabled at (76218): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3174 hardirqs last disabled at (76217): [] try_to_grab_pending+0xfb/0x820 kernel/workqueue.c:1272 softirqs last enabled at (74496): [] local_bh_enable+0x0/0x20 softirqs last disabled at (76153): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (76153): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last disabled at (76153): [] __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 *** 4 locks held by kworker/1:17/4655: #0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc90003377d00 ((work_completion)(&(&ssp->work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffffc90002e8b660 (&ssp->srcu_gp_mutex){+.+.}-{3:3}, at: srcu_advance_state kernel/rcu/srcutree.c:1177 [inline] #2: ffffc90002e8b660 (&ssp->srcu_gp_mutex){+.+.}-{3:3}, at: process_srcu+0x2f/0xca0 kernel/rcu/srcutree.c:1325 #3: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline] #3: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xca/0x540 kernel/time/timer.c:1638 stack backtrace: CPU: 1 PID: 4655 Comm: kworker/1:17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: rcu_gp process_srcu 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:delay_tsc+0x57/0xc0 arch/x86/lib/delay.c:79 Code: 90 49 89 d7 49 c1 e7 20 49 09 c7 4d 29 f7 49 39 df 73 53 bf 01 00 00 00 e8 b6 06 44 fd 65 8b 05 27 2e f4 7b 85 c0 74 1c f3 90 01 00 00 00 e8 0f 05 44 fd e8 7a 12 b2 05 39 c5 75 0e 0f 01 f9 RSP: 0018:ffffc90003377ac0 EFLAGS: 00000286 RAX: 0000000080000000 RBX: 0000000000002af9 RCX: 0000000000000000 RDX: 000000000000003c RSI: ffffffff8a7a42a0 RDI: 00000000ffffffff RBP: 0000000000000001 R08: ffffc90003377927 R09: 1ffff9200066ef24 R10: dffffc0000000000 R11: fffff5200066ef25 R12: dffffc0000000000 R13: ffffc90002e8b6a0 R14: 0000003c217a6152 R15: 00000000000000f2 try_check_zero+0x2cb/0x340 kernel/rcu/srcutree.c:702 srcu_advance_state kernel/rcu/srcutree.c:1227 [inline] process_srcu+0x1b6/0xca0 kernel/rcu/srcutree.c:1325 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 BUG: sleeping function called from invalid context at kernel/workqueue.c:3031 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4655, name: kworker/1:17 INFO: lockdep is turned off. Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:414 [inline] [] handle_softirqs+0xfd/0x830 kernel/softirq.c:552 CPU: 1 PID: 4655 Comm: kworker/1:17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: rcu_gp process_srcu 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:delay_tsc+0x57/0xc0 arch/x86/lib/delay.c:79 Code: 90 49 89 d7 49 c1 e7 20 49 09 c7 4d 29 f7 49 39 df 73 53 bf 01 00 00 00 e8 b6 06 44 fd 65 8b 05 27 2e f4 7b 85 c0 74 1c f3 90 01 00 00 00 e8 0f 05 44 fd e8 7a 12 b2 05 39 c5 75 0e 0f 01 f9 RSP: 0018:ffffc90003377ac0 EFLAGS: 00000286 RAX: 0000000080000000 RBX: 0000000000002af9 RCX: 0000000000000000 RDX: 000000000000003c RSI: ffffffff8a7a42a0 RDI: 00000000ffffffff RBP: 0000000000000001 R08: ffffc90003377927 R09: 1ffff9200066ef24 R10: dffffc0000000000 R11: fffff5200066ef25 R12: dffffc0000000000 R13: ffffc90002e8b6a0 R14: 0000003c217a6152 R15: 00000000000000f2 try_check_zero+0x2cb/0x340 kernel/rcu/srcutree.c:702 srcu_advance_state kernel/rcu/srcutree.c:1227 [inline] process_srcu+0x1b6/0xca0 kernel/rcu/srcutree.c:1325 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 ODEBUG: object ffffc90000dd09a0 is NOT on stack ffffc90003370000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4655 at lib/debugobjects.c:561 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 4655 at lib/debugobjects.c:561 lookup_object_or_alloc lib/debugobjects.c:594 [inline] WARNING: CPU: 1 PID: 4655 at lib/debugobjects.c:561 __debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Modules linked in: CPU: 1 PID: 4655 Comm: kworker/1:17 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: rcu_gp process_srcu 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: a6 23 73 12 48 c7 c1 c0 4a 7a 8a 48 c7 c7 20 4b 7a 8a 84 c0 48 0f 45 f9 4c 89 ee e8 ba cd c8 05 48 be 00 00 00 00 00 fc ff df <0f> 0b e9 4d fd ff ff 83 3d d2 22 73 12 00 4c 89 6c 24 28 0f 84 23 RSP: 0018:ffffc90000dd07e0 EFLAGS: 00010046 RAX: 0000000000000050 RBX: 0000000000000001 RCX: 6a3f40edd05ac100 RDX: 0000000000000100 RSI: dffffc0000000000 RDI: 0000000000000000 RBP: ffffc90000dd0950 R08: ffffffff8c313963 R09: 1ffffffff186272c R10: dffffc0000000000 R11: fffffbfff186272d R12: f8f8f8f8f8f8f8f8 R13: ffffc90000dd09a0 R14: ffff888023cb3ba0 R15: ffff8880608697e0 FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc007be82f8 CR3: 000000005fe7a000 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:delay_tsc+0x57/0xc0 arch/x86/lib/delay.c:79 Code: 90 49 89 d7 49 c1 e7 20 49 09 c7 4d 29 f7 49 39 df 73 53 bf 01 00 00 00 e8 b6 06 44 fd 65 8b 05 27 2e f4 7b 85 c0 74 1c f3 90 01 00 00 00 e8 0f 05 44 fd e8 7a 12 b2 05 39 c5 75 0e 0f 01 f9 RSP: 0018:ffffc90003377ac0 EFLAGS: 00000286 RAX: 0000000080000000 RBX: 0000000000002af9 RCX: 0000000000000000 RDX: 000000000000003c RSI: ffffffff8a7a42a0 RDI: 00000000ffffffff RBP: 0000000000000001 R08: ffffc90003377927 R09: 1ffff9200066ef24 R10: dffffc0000000000 R11: fffff5200066ef25 R12: dffffc0000000000 R13: ffffc90002e8b6a0 R14: 0000003c217a6152 R15: 00000000000000f2 try_check_zero+0x2cb/0x340 kernel/rcu/srcutree.c:702 srcu_advance_state kernel/rcu/srcutree.c:1227 [inline] process_srcu+0x1b6/0xca0 kernel/rcu/srcutree.c:1325 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 ---------------- Code disassembly (best guess): 0: 90 nop 1: 49 89 d7 mov %rdx,%r15 4: 49 c1 e7 20 shl $0x20,%r15 8: 49 09 c7 or %rax,%r15 b: 4d 29 f7 sub %r14,%r15 e: 49 39 df cmp %rbx,%r15 11: 73 53 jae 0x66 13: bf 01 00 00 00 mov $0x1,%edi 18: e8 b6 06 44 fd call 0xfd4406d3 1d: 65 8b 05 27 2e f4 7b mov %gs:0x7bf42e27(%rip),%eax # 0x7bf42e4b 24: 85 c0 test %eax,%eax 26: 74 1c je 0x44 28: f3 90 pause * 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2f: e8 0f 05 44 fd call 0xfd440543 34: e8 7a 12 b2 05 call 0x5b212b3 39: 39 c5 cmp %eax,%ebp 3b: 75 0e jne 0x4b 3d: 0f 01 f9 rdtscp