================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.0.1/4394 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff8880770e0648 ((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: 6296 hardirqs last enabled at (6296): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3156 hardirqs last disabled at (6295): [] try_to_grab_pending+0xfa/0x890 kernel/workqueue.c:1267 softirqs last enabled at (6206): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last enabled at (6206): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last enabled at (6206): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 softirqs last disabled at (6229): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last disabled at (6229): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last disabled at (6229): [] __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 syz.0.1/4394: #0: ffff88807643b5d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff88807643b5d8 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x177/0x970 mm/mmap.c:3235 #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pte_range mm/memory.c:1415 [inline] #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pmd_range mm/memory.c:1572 [inline] #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_pud_range mm/memory.c:1601 [inline] #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: zap_p4d_range mm/memory.c:1622 [inline] #1: ffff88807bdde2b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: unmap_page_range+0x99a/0x25b0 mm/memory.c:1643 #2: ffffc900001e0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xcf/0x670 kernel/time/timer.c:1698 stack backtrace: CPU: 1 PID: 4394 Comm: syz.0.1 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:__tlb_remove_page_size+0xeb/0x3f0 mm/mmu_gather.c:97 Code: e8 0a f0 0f 00 48 8b 44 24 08 49 89 45 00 4d 8d 6f 0c 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 13 02 00 00 45 8b 6d 00 <89> ef 44 89 ee e8 fb c3 be ff 44 39 ed 75 4d 48 8b 1c 24 42 80 3c RSP: 0018:ffffc90004097780 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88807894f010 RCX: ffff888079a90000 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000 RBP: 00000000000000d9 R08: ffffea00019d5033 R09: 1ffffd400033aa06 R10: dffffc0000000000 R11: fffff9400033aa07 R12: dffffc0000000000 R13: 00000000000001fe R14: ffffc90004097b08 R15: ffff88807894f000 __tlb_remove_page include/asm-generic/tlb.h:460 [inline] zap_pte_range mm/memory.c:1454 [inline] zap_pmd_range mm/memory.c:1572 [inline] zap_pud_range mm/memory.c:1601 [inline] zap_p4d_range mm/memory.c:1622 [inline] unmap_page_range+0x11ed/0x25b0 mm/memory.c:1643 unmap_vmas+0x260/0x390 mm/memory.c:1728 exit_mmap+0x20d/0x970 mm/mmap.c:3250 __mmput+0x118/0x3a0 kernel/fork.c:1206 exit_mm+0x24d/0x350 kernel/exit.c:572 do_exit+0x958/0x2570 kernel/exit.c:874 do_group_exit+0x229/0x2e0 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1039 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: 0033:0x7f550d59e0d9 Code: Unable to access opcode bytes at 0x7f550d59e0af. RSP: 002b:00007ffc9cba4c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f550d59e0d9 RDX: 0000001b2f624000 RSI: 000000000000000c RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000006 R09: 00007f550d7ec3e0 R10: 00000000005f093c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f550d7ec3e0 R14: 0000000000000003 R15: 00007ffc9cba4cc0 BUG: sleeping function called from invalid context at kernel/workqueue.c:3013 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4394, name: syz.0.1 preempt_count: 101, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 4394 Comm: syz.0.1 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:__tlb_remove_page_size+0xeb/0x3f0 mm/mmu_gather.c:97 Code: e8 0a f0 0f 00 48 8b 44 24 08 49 89 45 00 4d 8d 6f 0c 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 13 02 00 00 45 8b 6d 00 <89> ef 44 89 ee e8 fb c3 be ff 44 39 ed 75 4d 48 8b 1c 24 42 80 3c RSP: 0018:ffffc90004097780 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88807894f010 RCX: ffff888079a90000 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000 RBP: 00000000000000d9 R08: ffffea00019d5033 R09: 1ffffd400033aa06 R10: dffffc0000000000 R11: fffff9400033aa07 R12: dffffc0000000000 R13: 00000000000001fe R14: ffffc90004097b08 R15: ffff88807894f000 __tlb_remove_page include/asm-generic/tlb.h:460 [inline] zap_pte_range mm/memory.c:1454 [inline] zap_pmd_range mm/memory.c:1572 [inline] zap_pud_range mm/memory.c:1601 [inline] zap_p4d_range mm/memory.c:1622 [inline] unmap_page_range+0x11ed/0x25b0 mm/memory.c:1643 unmap_vmas+0x260/0x390 mm/memory.c:1728 exit_mmap+0x20d/0x970 mm/mmap.c:3250 __mmput+0x118/0x3a0 kernel/fork.c:1206 exit_mm+0x24d/0x350 kernel/exit.c:572 do_exit+0x958/0x2570 kernel/exit.c:874 do_group_exit+0x229/0x2e0 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1039 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: 0033:0x7f550d59e0d9 Code: Unable to access opcode bytes at 0x7f550d59e0af. RSP: 002b:00007ffc9cba4c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f550d59e0d9 RDX: 0000001b2f624000 RSI: 000000000000000c RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000006 R09: 00007f550d7ec3e0 R10: 00000000005f093c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f550d7ec3e0 R14: 0000000000000003 R15: 00007ffc9cba4cc0 ODEBUG: object ffffc900001e09a0 is NOT on stack ffffc90004090000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4394 at lib/debugobjects.c:558 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 4394 at lib/debugobjects.c:558 lookup_object_or_alloc lib/debugobjects.c:591 [inline] WARNING: CPU: 1 PID: 4394 at lib/debugobjects.c:558 __debug_object_init+0x18e/0x440 lib/debugobjects.c:672 Modules linked in: CPU: 1 PID: 4394 Comm: syz.0.1 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:ffffc900001e0908 EFLAGS: 00010046 RAX: 0000000000000050 RBX: ffffc900001e09a0 RCX: d9585e01e0eac900 RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff8cb21ce3 R09: 1ffffffff196439c R10: dffffc0000000000 R11: fffffbfff196439d R12: ffff888079a90020 R13: ffff888077a8b038 R14: 0000000000000001 R15: ffffffff8a8d3020 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d4ed0d4d0 CR3: 00000000562c5000 CR4: 00000000003506e0 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:__tlb_remove_page_size+0xeb/0x3f0 mm/mmu_gather.c:97 Code: e8 0a f0 0f 00 48 8b 44 24 08 49 89 45 00 4d 8d 6f 0c 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 13 02 00 00 45 8b 6d 00 <89> ef 44 89 ee e8 fb c3 be ff 44 39 ed 75 4d 48 8b 1c 24 42 80 3c RSP: 0018:ffffc90004097780 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88807894f010 RCX: ffff888079a90000 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000 RBP: 00000000000000d9 R08: ffffea00019d5033 R09: 1ffffd400033aa06 R10: dffffc0000000000 R11: fffff9400033aa07 R12: dffffc0000000000 R13: 00000000000001fe R14: ffffc90004097b08 R15: ffff88807894f000 __tlb_remove_page include/asm-generic/tlb.h:460 [inline] zap_pte_range mm/memory.c:1454 [inline] zap_pmd_range mm/memory.c:1572 [inline] zap_pud_range mm/memory.c:1601 [inline] zap_p4d_range mm/memory.c:1622 [inline] unmap_page_range+0x11ed/0x25b0 mm/memory.c:1643 unmap_vmas+0x260/0x390 mm/memory.c:1728 exit_mmap+0x20d/0x970 mm/mmap.c:3250 __mmput+0x118/0x3a0 kernel/fork.c:1206 exit_mm+0x24d/0x350 kernel/exit.c:572 do_exit+0x958/0x2570 kernel/exit.c:874 do_group_exit+0x229/0x2e0 kernel/exit.c:1030 __do_sys_exit_group kernel/exit.c:1041 [inline] __se_sys_exit_group kernel/exit.c:1039 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1039 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: 0033:0x7f550d59e0d9 Code: Unable to access opcode bytes at 0x7f550d59e0af. RSP: 002b:00007ffc9cba4c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f550d59e0d9 RDX: 0000001b2f624000 RSI: 000000000000000c RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000006 R09: 00007f550d7ec3e0 R10: 00000000005f093c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f550d7ec3e0 R14: 0000000000000003 R15: 00007ffc9cba4cc0 ---------------- Code disassembly (best guess): 0: e8 0a f0 0f 00 call 0xff00f 5: 48 8b 44 24 08 mov 0x8(%rsp),%rax a: 49 89 45 00 mov %rax,0x0(%r13) e: 4d 8d 6f 0c lea 0xc(%r15),%r13 12: 4c 89 e8 mov %r13,%rax 15: 48 c1 e8 03 shr $0x3,%rax 19: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax 1e: 84 c0 test %al,%al 20: 0f 85 13 02 00 00 jne 0x239 26: 45 8b 6d 00 mov 0x0(%r13),%r13d * 2a: 89 ef mov %ebp,%edi <-- trapping instruction 2c: 44 89 ee mov %r13d,%esi 2f: e8 fb c3 be ff call 0xffbec42f 34: 44 39 ed cmp %r13d,%ebp 37: 75 4d jne 0x86 39: 48 8b 1c 24 mov (%rsp),%rbx 3d: 42 rex.X 3e: 80 .byte 0x80 3f: 3c .byte 0x3c