================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.2.442/6155 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807ee24648 ((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:5678 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: 18912 hardirqs last enabled at (18912): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3156 hardirqs last disabled at (18911): [] try_to_grab_pending+0xfa/0x890 kernel/workqueue.c:1267 softirqs last enabled at (16458): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last enabled at (16458): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last enabled at (16458): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 softirqs last disabled at (18837): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last disabled at (18837): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last disabled at (18837): [] __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 *** 4 locks held by syz.2.442/6155: #0: ffff88802fc788d8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] #0: ffff88802fc788d8 (&mm->mmap_lock){++++}-{3:3}, at: __access_remote_vm+0xaf/0x480 mm/memory.c:5705 #1: ffff8880238c30d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #1: ffff8880238c30d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: do_anonymous_page mm/memory.c:4169 [inline] #1: ffff8880238c30d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: handle_pte_fault mm/memory.c:5027 [inline] #1: ffff8880238c30d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: __handle_mm_fault mm/memory.c:5171 [inline] #1: ffff8880238c30d8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: handle_mm_fault+0x29c6/0x3d40 mm/memory.c:5292 #2: ffffffff8cb2d7e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #2: ffffffff8cb2d7e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #2: ffffffff8cb2d7e0 (rcu_read_lock){....}-{1:2}, at: page_ext_get+0x1e/0x2a0 mm/page_ext.c:157 #3: ffffc900001e0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xcf/0x670 kernel/time/timer.c:1698 stack backtrace: CPU: 1 PID: 6155 Comm: syz.2.442 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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:5678 __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:rcu_lockdep_current_cpu_online+0xed/0x120 kernel/rcu/tree.c:778 Code: 67 00 4c 85 3b 75 1a 48 c7 c7 40 36 b3 8c be 04 00 00 00 e8 25 4d 67 00 83 3d 2e 0a 47 0b 00 74 11 b0 01 65 ff 0d 2b 43 96 7e <74> 0a 5b 41 5e 41 5f c3 31 c0 eb ed e8 4a 57 94 ff eb ef 48 c7 c7 RSP: 0018:ffffc90004adf550 EFLAGS: 00000282 RAX: 1ffffffff1966501 RBX: ffffffff8cb32db0 RCX: f5cf418fa1fe3800 RDX: ffffc9000e119000 RSI: ffffffff8adf6880 RDI: ffff8880b8f3bba0 RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff2161e48 R10: dffffc0000000000 R11: fffffbfff2161e49 R12: dffffc0000000000 R13: 0000000000000020 R14: dffffc0000000000 R15: 0000000000000002 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309 lookup_page_ext mm/page_ext.c:277 [inline] page_ext_get+0x18f/0x2a0 mm/page_ext.c:158 page_table_check_set+0x51/0x6d0 mm/page_table_check.c:112 page_table_check_pte_set include/linux/page_table_check.h:83 [inline] set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline] do_anonymous_page mm/memory.c:4231 [inline] handle_pte_fault mm/memory.c:5027 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x3bc3/0x3d40 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x40d/0xec0 mm/gup.c:1250 __get_user_pages_locked mm/gup.c:1454 [inline] __get_user_pages_remote+0x1c2/0x730 mm/gup.c:2215 __access_remote_vm+0x182/0x480 mm/memory.c:5722 get_mm_cmdline fs/proc/base.c:349 [inline] get_task_cmdline fs/proc/base.c:378 [inline] proc_pid_cmdline_read+0x42c/0x7e0 fs/proc/base.c:394 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x482/0xb10 fs/read_write.c:798 vfs_readv fs/read_write.c:916 [inline] do_preadv+0x233/0x390 fs/read_write.c:1008 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: 0033:0x7f47e2f9e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f47e3e12028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f47e3225fa0 RCX: 00007f47e2f9e159 RDX: 0000000000000001 RSI: 0000200000001200 RDI: 0000000000000004 RBP: 00007f47e303506b R08: 0000000000006a76 R09: 0000000000000000 R10: 000000000000003f R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47e3226038 R14: 00007f47e3225fa0 R15: 00007fff35613808 BUG: sleeping function called from invalid context at kernel/workqueue.c:3013 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6155, name: syz.2.442 preempt_count: 101, expected: 0 RCU nest depth: 1, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 6155 Comm: syz.2.442 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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:rcu_lockdep_current_cpu_online+0xed/0x120 kernel/rcu/tree.c:778 Code: 67 00 4c 85 3b 75 1a 48 c7 c7 40 36 b3 8c be 04 00 00 00 e8 25 4d 67 00 83 3d 2e 0a 47 0b 00 74 11 b0 01 65 ff 0d 2b 43 96 7e <74> 0a 5b 41 5e 41 5f c3 31 c0 eb ed e8 4a 57 94 ff eb ef 48 c7 c7 RSP: 0018:ffffc90004adf550 EFLAGS: 00000282 RAX: 1ffffffff1966501 RBX: ffffffff8cb32db0 RCX: f5cf418fa1fe3800 RDX: ffffc9000e119000 RSI: ffffffff8adf6880 RDI: ffff8880b8f3bba0 RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff2161e48 R10: dffffc0000000000 R11: fffffbfff2161e49 R12: dffffc0000000000 R13: 0000000000000020 R14: dffffc0000000000 R15: 0000000000000002 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309 lookup_page_ext mm/page_ext.c:277 [inline] page_ext_get+0x18f/0x2a0 mm/page_ext.c:158 page_table_check_set+0x51/0x6d0 mm/page_table_check.c:112 page_table_check_pte_set include/linux/page_table_check.h:83 [inline] set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline] do_anonymous_page mm/memory.c:4231 [inline] handle_pte_fault mm/memory.c:5027 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x3bc3/0x3d40 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x40d/0xec0 mm/gup.c:1250 __get_user_pages_locked mm/gup.c:1454 [inline] __get_user_pages_remote+0x1c2/0x730 mm/gup.c:2215 __access_remote_vm+0x182/0x480 mm/memory.c:5722 get_mm_cmdline fs/proc/base.c:349 [inline] get_task_cmdline fs/proc/base.c:378 [inline] proc_pid_cmdline_read+0x42c/0x7e0 fs/proc/base.c:394 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x482/0xb10 fs/read_write.c:798 vfs_readv fs/read_write.c:916 [inline] do_preadv+0x233/0x390 fs/read_write.c:1008 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: 0033:0x7f47e2f9e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f47e3e12028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f47e3225fa0 RCX: 00007f47e2f9e159 RDX: 0000000000000001 RSI: 0000200000001200 RDI: 0000000000000004 RBP: 00007f47e303506b R08: 0000000000006a76 R09: 0000000000000000 R10: 000000000000003f R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47e3226038 R14: 00007f47e3225fa0 R15: 00007fff35613808 ODEBUG: object ffffc900001e09a0 is NOT on stack ffffc90004ad8000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6155 at lib/debugobjects.c:558 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 6155 at lib/debugobjects.c:558 lookup_object_or_alloc lib/debugobjects.c:591 [inline] WARNING: CPU: 1 PID: 6155 at lib/debugobjects.c:558 __debug_object_init+0x18e/0x440 lib/debugobjects.c:672 Modules linked in: CPU: 1 PID: 6155 Comm: syz.2.442 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 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 7e 6a dd 12 48 c7 c1 40 71 df 8a 48 c7 c7 a0 71 df 8a 84 c0 48 0f 45 f9 48 89 de e8 f2 b9 0c 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: f5cf418fa1fe3800 RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffc900001e0587 R09: 1ffff9200003c0b0 R10: dffffc0000000000 R11: fffff5200003c0b1 R12: ffff88804f758020 R13: ffff88802cdc9b60 R14: 0000000000000001 R15: ffffffff8a8d3120 FS: 00007f47e3e126c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000003a6000 CR3: 000000007833c000 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:rcu_lockdep_current_cpu_online+0xed/0x120 kernel/rcu/tree.c:778 Code: 67 00 4c 85 3b 75 1a 48 c7 c7 40 36 b3 8c be 04 00 00 00 e8 25 4d 67 00 83 3d 2e 0a 47 0b 00 74 11 b0 01 65 ff 0d 2b 43 96 7e <74> 0a 5b 41 5e 41 5f c3 31 c0 eb ed e8 4a 57 94 ff eb ef 48 c7 c7 RSP: 0018:ffffc90004adf550 EFLAGS: 00000282 RAX: 1ffffffff1966501 RBX: ffffffff8cb32db0 RCX: f5cf418fa1fe3800 RDX: ffffc9000e119000 RSI: ffffffff8adf6880 RDI: ffff8880b8f3bba0 RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff2161e48 R10: dffffc0000000000 R11: fffffbfff2161e49 R12: dffffc0000000000 R13: 0000000000000020 R14: dffffc0000000000 R15: 0000000000000002 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309 lookup_page_ext mm/page_ext.c:277 [inline] page_ext_get+0x18f/0x2a0 mm/page_ext.c:158 page_table_check_set+0x51/0x6d0 mm/page_table_check.c:112 page_table_check_pte_set include/linux/page_table_check.h:83 [inline] set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline] do_anonymous_page mm/memory.c:4231 [inline] handle_pte_fault mm/memory.c:5027 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x3bc3/0x3d40 mm/memory.c:5292 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x40d/0xec0 mm/gup.c:1250 __get_user_pages_locked mm/gup.c:1454 [inline] __get_user_pages_remote+0x1c2/0x730 mm/gup.c:2215 __access_remote_vm+0x182/0x480 mm/memory.c:5722 get_mm_cmdline fs/proc/base.c:349 [inline] get_task_cmdline fs/proc/base.c:378 [inline] proc_pid_cmdline_read+0x42c/0x7e0 fs/proc/base.c:394 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x482/0xb10 fs/read_write.c:798 vfs_readv fs/read_write.c:916 [inline] do_preadv+0x233/0x390 fs/read_write.c:1008 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: 0033:0x7f47e2f9e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f47e3e12028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f47e3225fa0 RCX: 00007f47e2f9e159 RDX: 0000000000000001 RSI: 0000200000001200 RDI: 0000000000000004 RBP: 00007f47e303506b R08: 0000000000006a76 R09: 0000000000000000 R10: 000000000000003f R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47e3226038 R14: 00007f47e3225fa0 R15: 00007fff35613808 ---------------- Code disassembly (best guess): 0: 67 00 4c 85 3b add %cl,0x3b(%ebp,%eax,4) 5: 75 1a jne 0x21 7: 48 c7 c7 40 36 b3 8c mov $0xffffffff8cb33640,%rdi e: be 04 00 00 00 mov $0x4,%esi 13: e8 25 4d 67 00 call 0x674d3d 18: 83 3d 2e 0a 47 0b 00 cmpl $0x0,0xb470a2e(%rip) # 0xb470a4d 1f: 74 11 je 0x32 21: b0 01 mov $0x1,%al 23: 65 ff 0d 2b 43 96 7e decl %gs:0x7e96432b(%rip) # 0x7e964355 * 2a: 74 0a je 0x36 <-- trapping instruction 2c: 5b pop %rbx 2d: 41 5e pop %r14 2f: 41 5f pop %r15 31: c3 ret 32: 31 c0 xor %eax,%eax 34: eb ed jmp 0x23 36: e8 4a 57 94 ff call 0xff945785 3b: eb ef jmp 0x2c 3d: 48 rex.W 3e: c7 .byte 0xc7 3f: c7 .byte 0xc7