================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.2.57/4576 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807adb4710 ((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+0x19f/0x400 kernel/locking/lockdep.c:5737 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: 16016 hardirqs last enabled at (16016): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3174 hardirqs last disabled at (16015): [] try_to_grab_pending+0xfb/0x820 kernel/workqueue.c:1272 softirqs last enabled at (15856): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last enabled at (15856): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last enabled at (15856): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 softirqs last disabled at (15943): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (15943): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last disabled at (15943): [] __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 *** 3 locks held by syz.2.57/4576: #0: ffff888076c260e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229 #1: ffffffff8d113ae0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0xa7/0x150 kernel/printk/printk.c:2273 #2: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline] #2: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xca/0x540 kernel/time/timer.c:1638 stack backtrace: CPU: 1 PID: 4576 Comm: syz.2.57 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:3999 mark_lock_irq+0xa9/0x900 kernel/locking/lockdep.c:4202 mark_lock+0x208/0x320 kernel/locking/lockdep.c:4664 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0xd77/0x7d40 kernel/locking/lockdep.c:5074 lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737 __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:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 8d d8 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900032ef5c0 EFLAGS: 00000246 RAX: ffffffff81603e4d RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000f14f000 RSI: 0000000000021cf8 RDI: 0000000000000000 RBP: ffffc900032ef830 R08: ffffffff910150c7 R09: 1ffffffff2202a18 R10: dffffc0000000000 R11: fffffbfff2202a19 R12: 0000000000000200 R13: 000000000000007b R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 _printk+0xda/0x130 kernel/printk/printk.c:2299 __ext4_msg+0x20e/0x220 fs/ext4/super.c:917 ext4_fill_super+0x9079/0x93f0 fs/ext4/super.c:5041 mount_bdev+0x28a/0x3c0 fs/super.c:1411 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1541 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 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: 0033:0x7fb5c03947ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fb5be5c9e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb5be5c9ee0 RCX: 00007fb5c03947ca RDX: 00002000000001c0 RSI: 00002000000000c0 RDI: 00007fb5be5c9ea0 RBP: 00002000000001c0 R08: 00007fb5be5c9ee0 R09: 0000000000010000 R10: 0000000000010000 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007fb5be5c9ea0 R14: 000000000000050a R15: 0000200000000200 BUG: sleeping function called from invalid context at kernel/workqueue.c:3031 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4576, name: syz.2.57 INFO: lockdep is turned off. Preemption disabled at: [] vprintk_emit+0xa2/0x150 kernel/printk/printk.c:2267 CPU: 1 PID: 4576 Comm: syz.2.57 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:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 8d d8 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900032ef5c0 EFLAGS: 00000246 RAX: ffffffff81603e4d RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000f14f000 RSI: 0000000000021cf8 RDI: 0000000000000000 RBP: ffffc900032ef830 R08: ffffffff910150c7 R09: 1ffffffff2202a18 R10: dffffc0000000000 R11: fffffbfff2202a19 R12: 0000000000000200 R13: 000000000000007b R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 _printk+0xda/0x130 kernel/printk/printk.c:2299 __ext4_msg+0x20e/0x220 fs/ext4/super.c:917 ext4_fill_super+0x9079/0x93f0 fs/ext4/super.c:5041 mount_bdev+0x28a/0x3c0 fs/super.c:1411 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1541 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 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: 0033:0x7fb5c03947ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fb5be5c9e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb5be5c9ee0 RCX: 00007fb5c03947ca RDX: 00002000000001c0 RSI: 00002000000000c0 RDI: 00007fb5be5c9ea0 RBP: 00002000000001c0 R08: 00007fb5be5c9ee0 R09: 0000000000010000 R10: 0000000000010000 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007fb5be5c9ea0 R14: 000000000000050a R15: 0000200000000200 ODEBUG: object ffffc90000dd09a0 is NOT on stack ffffc900032e8000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4576 at lib/debugobjects.c:561 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 4576 at lib/debugobjects.c:561 lookup_object_or_alloc lib/debugobjects.c:594 [inline] WARNING: CPU: 1 PID: 4576 at lib/debugobjects.c:561 __debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Modules linked in: CPU: 1 PID: 4576 Comm: syz.2.57 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: 16 d2 54 13 48 c7 c1 00 54 7a 8a 48 c7 c7 60 54 7a 8a 84 c0 48 0f 45 f9 4c 89 ee e8 ca ee c9 05 48 be 00 00 00 00 00 fc ff df <0f> 0b e9 4d fd ff ff 83 3d 42 d1 54 13 00 4c 89 6c 24 28 0f 84 23 RSP: 0018:ffffc90000dd07e0 EFLAGS: 00010046 RAX: 0000000000000050 RBX: 0000000000000001 RCX: db19d7244ad92400 RDX: 0000000000000100 RSI: dffffc0000000000 RDI: 0000000000000000 RBP: ffffc90000dd0950 R08: ffffffff8d1139a3 R09: 1ffffffff1a22734 R10: dffffc0000000000 R11: fffffbfff1a22735 R12: ffff8880613f2408 R13: ffffc90000dd09a0 R14: ffff8880220c8020 R15: ffff88805c91d1f8 FS: 00007fb5be5ca6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000038e030 CR3: 000000002b6e6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 8d d8 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900032ef5c0 EFLAGS: 00000246 RAX: ffffffff81603e4d RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000f14f000 RSI: 0000000000021cf8 RDI: 0000000000000000 RBP: ffffc900032ef830 R08: ffffffff910150c7 R09: 1ffffffff2202a18 R10: dffffc0000000000 R11: fffffbfff2202a19 R12: 0000000000000200 R13: 000000000000007b R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 _printk+0xda/0x130 kernel/printk/printk.c:2299 __ext4_msg+0x20e/0x220 fs/ext4/super.c:917 ext4_fill_super+0x9079/0x93f0 fs/ext4/super.c:5041 mount_bdev+0x28a/0x3c0 fs/super.c:1411 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1541 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 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: 0033:0x7fb5c03947ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fb5be5c9e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb5be5c9ee0 RCX: 00007fb5c03947ca RDX: 00002000000001c0 RSI: 00002000000000c0 RDI: 00007fb5be5c9ea0 RBP: 00002000000001c0 R08: 00007fb5be5c9ee0 R09: 0000000000010000 R10: 0000000000010000 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007fb5be5c9ea0 R14: 000000000000050a R15: 0000200000000200 ---------------- Code disassembly (best guess): 0: 75 11 jne 0x13 2: e8 33 e5 18 00 call 0x18e53a 7: 4d 85 e4 test %r12,%r12 a: 75 16 jne 0x22 c: e8 29 e5 18 00 call 0x18e53a 11: eb 15 jmp 0x28 13: e8 22 e5 18 00 call 0x18e53a 18: e8 8d d8 61 08 call 0x861d8aa 1d: 4d 85 e4 test %r12,%r12 20: 74 ea je 0xc 22: e8 13 e5 18 00 call 0x18e53a 27: fb sti 28: 31 ff xor %edi,%edi * 2a: 89 de mov %ebx,%esi <-- trapping instruction 2c: e8 69 e8 18 00 call 0x18e89a 31: 85 db test %ebx,%ebx 33: 0f 94 c0 sete %al 36: 22 44 24 1f and 0x1f(%rsp),%al 3a: 3c 01 cmp $0x1,%al 3c: 75 1f jne 0x5d 3e: e8 .byte 0xe8 3f: f7 .byte 0xf7