================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. udevd/5792 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807cc38648 ((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 __flush_work+0x122/0xac0 kernel/workqueue.c:3072 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3163 __mmc_stop_host drivers/mmc/core/core.c:2303 [inline] mmc_stop_host+0xd5/0x460 drivers/mmc/core/core.c:2308 mmc_remove_host+0x11/0x60 drivers/mmc/core/host.c:651 vub300_disconnect+0x14b/0x2e0 drivers/mmc/host/vub300.c:2382 usb_unbind_interface+0x203/0x870 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:549 [inline] __device_release_driver drivers/base/dd.c:1279 [inline] device_release_driver_internal+0x4cf/0x7c0 drivers/base/dd.c:1305 bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531 device_del+0x63f/0xa80 drivers/base/core.c:3900 usb_disable_device+0x3e7/0x8a0 drivers/usb/core/message.c:1472 usb_disconnect+0x33c/0x8a0 drivers/usb/core/hub.c:2314 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5657 [inline] port_event drivers/usb/core/hub.c:5817 [inline] hub_event+0x1d27/0x5200 drivers/usb/core/hub.c:5899 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292 process_scheduled_works kernel/workqueue.c:2355 [inline] worker_thread+0xd6e/0x12a0 kernel/workqueue.c:2441 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 irq event stamp: 2347724 hardirqs last enabled at (2347724): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3156 hardirqs last disabled at (2347723): [] try_to_grab_pending+0xfa/0x890 kernel/workqueue.c:1267 softirqs last enabled at (2347188): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last enabled at (2347188): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last enabled at (2347188): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 softirqs last disabled at (2347659): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last disabled at (2347659): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last disabled at (2347659): [] __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 *** 3 locks held by udevd/5792: #0: ffff88801e3f71d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_downgrade include/linux/mmap_lock.h:111 [inline] #0: ffff88801e3f71d8 (&mm->mmap_lock){++++}-{3:3}, at: do_mas_align_munmap+0xc9a/0x12d0 mm/mmap.c:2589 #1: ffffffff8cb2db60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #1: ffffffff8cb2db60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #1: ffffffff8cb2db60 (rcu_read_lock){....}-{1:2}, at: mt_validate+0x110/0x4c60 lib/maple_tree.c:7224 #2: ffffc90000007bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xcf/0x670 kernel/time/timer.c:1698 stack backtrace: CPU: 0 PID: 5792 Comm: udevd 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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215 Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 df 9e 0c 48 89 de 5b e9 77 62 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 14 41 80 7e 65 8b 15 15 41 80 7e 81 e2 00 01 ff 00 74 RSP: 0018:ffffc90003b2f758 EFLAGS: 00000206 RAX: ffffffff8a1d9f32 RBX: 0000000000000002 RCX: ffff88801f7a1e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90003b2f910 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff2e10a34 R12: ffff88802e99e00c R13: ffff88802bb1960c R14: 0000000000000001 R15: ffff88807780b460 mas_validate_parent_slot lib/maple_tree.c:7059 [inline] mt_validate+0x1072/0x4c60 lib/maple_tree.c:7242 validate_mm_mt+0xd9/0x420 mm/mmap.c:295 validate_mm+0xe1/0x2e0 mm/mmap.c:332 do_mas_align_munmap+0x102d/0x12d0 mm/mmap.c:2599 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x1aa/0x2d0 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb1d1f1e097 Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc119a3aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 00005648c3649790 RCX: 00007fb1d1f1e097 RDX: 00005648c365c098 RSI: 0000000000000200 RDI: 00007fb1d25cc000 RBP: 0000000000000010 R08: 00005648c3641a30 R09: 0000000000000003 R10: 0000000000000040 R11: 0000000000000246 R12: 00005648c3656fe0 R13: 00007fb1d270539c R14: 0000000000002000 R15: 0000000000000009 BUG: sleeping function called from invalid context at kernel/workqueue.c:3013 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5792, name: udevd preempt_count: 100, expected: 0 RCU nest depth: 1, 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: 5792 Comm: udevd 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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215 Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 df 9e 0c 48 89 de 5b e9 77 62 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 14 41 80 7e 65 8b 15 15 41 80 7e 81 e2 00 01 ff 00 74 RSP: 0018:ffffc90003b2f758 EFLAGS: 00000206 RAX: ffffffff8a1d9f32 RBX: 0000000000000002 RCX: ffff88801f7a1e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90003b2f910 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff2e10a34 R12: ffff88802e99e00c R13: ffff88802bb1960c R14: 0000000000000001 R15: ffff88807780b460 mas_validate_parent_slot lib/maple_tree.c:7059 [inline] mt_validate+0x1072/0x4c60 lib/maple_tree.c:7242 validate_mm_mt+0xd9/0x420 mm/mmap.c:295 validate_mm+0xe1/0x2e0 mm/mmap.c:332 do_mas_align_munmap+0x102d/0x12d0 mm/mmap.c:2599 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x1aa/0x2d0 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb1d1f1e097 Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc119a3aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 00005648c3649790 RCX: 00007fb1d1f1e097 RDX: 00005648c365c098 RSI: 0000000000000200 RDI: 00007fb1d25cc000 RBP: 0000000000000010 R08: 00005648c3641a30 R09: 0000000000000003 R10: 0000000000000040 R11: 0000000000000246 R12: 00005648c3656fe0 R13: 00007fb1d270539c R14: 0000000000002000 R15: 0000000000000009 ODEBUG: object ffffc900000079a0 is NOT on stack ffffc90003b28000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5792 at lib/debugobjects.c:558 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 0 PID: 5792 at lib/debugobjects.c:558 lookup_object_or_alloc lib/debugobjects.c:591 [inline] WARNING: CPU: 0 PID: 5792 at lib/debugobjects.c:558 __debug_object_init+0x18e/0x440 lib/debugobjects.c:672 Modules linked in: CPU: 0 PID: 5792 Comm: udevd 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 0e fc dd 12 48 c7 c1 80 66 df 8a 48 c7 c7 e0 66 df 8a 84 c0 48 0f 45 f9 48 89 de e8 e2 cb 0a 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: 2efee7e960dab800 RDX: 0000000000000100 RSI: 0000000000000101 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffc90000007587 R09: 1ffff92000000eb0 R10: dffffc0000000000 R11: fffff52000000eb1 R12: ffff88801f7a1e20 R13: ffff888018aad1c0 R14: 0000000000000001 R15: ffffffff8a8d3020 FS: 00007fb1d25de880(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9351ff8a10 CR3: 000000002a82e000 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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:215 Code: 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 df 9e 0c 48 89 de 5b e9 77 62 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 14 41 80 7e 65 8b 15 15 41 80 7e 81 e2 00 01 ff 00 74 RSP: 0018:ffffc90003b2f758 EFLAGS: 00000206 RAX: ffffffff8a1d9f32 RBX: 0000000000000002 RCX: ffff88801f7a1e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90003b2f910 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff2e10a34 R12: ffff88802e99e00c R13: ffff88802bb1960c R14: 0000000000000001 R15: ffff88807780b460 mas_validate_parent_slot lib/maple_tree.c:7059 [inline] mt_validate+0x1072/0x4c60 lib/maple_tree.c:7242 validate_mm_mt+0xd9/0x420 mm/mmap.c:295 validate_mm+0xe1/0x2e0 mm/mmap.c:332 do_mas_align_munmap+0x102d/0x12d0 mm/mmap.c:2599 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x1aa/0x2d0 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb1d1f1e097 Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc119a3aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 00005648c3649790 RCX: 00007fb1d1f1e097 RDX: 00005648c365c098 RSI: 0000000000000200 RDI: 00007fb1d25cc000 RBP: 0000000000000010 R08: 00005648c3641a30 R09: 0000000000000003 R10: 0000000000000040 R11: 0000000000000246 R12: 00005648c3656fe0 R13: 00007fb1d270539c R14: 0000000000002000 R15: 0000000000000009 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 90 53 48 89 fb add %dl,-0x476b7ad(%rax) a: e8 17 00 00 00 call 0x26 f: 48 8b 3d 00 df 9e 0c mov 0xc9edf00(%rip),%rdi # 0xc9edf16 16: 48 89 de mov %rbx,%rsi 19: 5b pop %rbx 1a: e9 77 62 50 00 jmp 0x506296 1f: 00 00 add %al,(%rax) 21: cc int3 22: cc int3 23: 00 00 add %al,(%rax) 25: cc int3 26: 48 8b 04 24 mov (%rsp),%rax * 2a: 65 48 8b 0d 14 41 80 mov %gs:0x7e804114(%rip),%rcx # 0x7e804146 <-- trapping instruction 31: 7e 32: 65 8b 15 15 41 80 7e mov %gs:0x7e804115(%rip),%edx # 0x7e80414e 39: 81 e2 00 01 ff 00 and $0xff0100,%edx 3f: 74 .byte 0x74