I/O error, dev loop8, sector 18692 op 0x0:(READ) flags 0x880700 phys_seg 1 prio class 2 ================================ WARNING: inconsistent lock state syzkaller #0 Tainted: G L -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/u8:12/11736 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807fafd500 (&sb->s_type->i_lock_key#50){+.?.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff88807fafd500 (&sb->s_type->i_lock_key#50){+.?.}-{3:3}, at: igrab+0x2a/0x230 fs/inode.c:1574 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] unlock_new_inode+0x7a/0x330 fs/inode.c:1213 xfs_finish_inode_setup fs/xfs/xfs_inode.h:630 [inline] xfs_setup_existing_inode fs/xfs/xfs_inode.h:637 [inline] xfs_iget+0x1196/0x30f0 fs/xfs/xfs_icache.c:814 xfs_mountfs+0x108c/0x20b0 fs/xfs/xfs_mount.c:1072 xfs_fs_fill_super+0x153f/0x1f20 fs/xfs/xfs_super.c:1947 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1694 vfs_get_tree+0x92/0x320 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3761 [inline] do_new_mount fs/namespace.c:3837 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4147 do_mount fs/namespace.c:4160 [inline] __do_sys_mount fs/namespace.c:4349 [inline] __se_sys_mount fs/namespace.c:4326 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4326 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 1437372 hardirqs last enabled at (1437372): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1437372): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (1437371): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1437371): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1437320): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (1437320): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:890 [inline] softirqs last enabled at (1437320): [] nsim_dev_trap_report_work+0x8c7/0xd10 drivers/net/netdevsim/dev.c:921 softirqs last disabled at (1437353): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1437353): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1437353): [] __irq_exit_rcu+0xef/0x150 kernel/softirq.c:723 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&sb->s_type->i_lock_key#50); lock(&sb->s_type->i_lock_key#50); *** DEADLOCK *** 2 locks held by kworker/u8:12/11736: #0: ffff888079e6c148 ((wq_completion)loop8){+.+.}-{0:0}, at: process_one_work+0x11ae/0x1840 kernel/workqueue.c:3232 #1: ffffc9001333fc98 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work+0x927/0x1840 kernel/workqueue.c:3233 stack backtrace: CPU: 1 UID: 0 PID: 11736 Comm: kworker/u8:12 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: loop8 loop_workfn Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_usage_bug.part.0+0x257/0x340 kernel/locking/lockdep.c:4042 print_usage_bug kernel/locking/lockdep.c:4010 [inline] valid_state kernel/locking/lockdep.c:4056 [inline] mark_lock_irq kernel/locking/lockdep.c:4267 [inline] mark_lock+0x74a/0xa20 kernel/locking/lockdep.c:4753 mark_usage kernel/locking/lockdep.c:4642 [inline] __lock_acquire+0x103a/0x2630 kernel/locking/lockdep.c:5191 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] igrab+0x2a/0x230 fs/inode.c:1574 fserror_report+0x3fd/0x750 fs/fserror.c:159 fserror_report_io include/linux/fserror.h:48 [inline] iomap_finish_folio_read+0x168/0x2c0 fs/iomap/buffered-io.c:407 iomap_read_end_io+0x11a/0x430 fs/iomap/bio.c:17 bio_endio+0x755/0x8b0 block/bio.c:1709 blk_update_request+0x741/0x1330 block/blk-mq.c:1007 blk_mq_end_request+0x5b/0x420 block/blk-mq.c:1169 lo_complete_rq+0x1d4/0x2a0 drivers/block/loop.c:314 blk_complete_reqs+0xb1/0xf0 block/blk-mq.c:1244 handle_softirqs+0x1ea/0x910 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xef/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 fa 9c 67 f6 48 89 df e8 e2 ea 67 f6 e8 fd 31 93 f6 fb bf 01 00 00 00 92 39 58 f6 65 8b 05 1b 79 6a 08 85 c0 74 06 5b e9 ec a9 94 f5 RSP: 0018:ffffc9001333fb30 EFLAGS: 00000202 RAX: 000000000015eea7 RBX: ffff888141bdd0c8 RCX: 0000000000000040 RDX: 0000000000000000 RSI: ffffffff8dc4d62d RDI: 0000000000000001 RBP: ffff888141bdd168 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888141bdd168 R13: ffff888141bdd170 R14: ffffffff8e211280 R15: 0000000004208060 spin_unlock_irq include/linux/spinlock.h:401 [inline] loop_process_work+0xa0a/0x11c0 drivers/block/loop.c:1977 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3421 kthread+0x3b3/0x730 kernel/kthread.c:463 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 53 push %rbx 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fb mov %rdi,%rbx e: 48 83 c7 18 add $0x18,%rdi 12: e8 fa 9c 67 f6 call 0xf6679d11 17: 48 89 df mov %rbx,%rdi 1a: e8 e2 ea 67 f6 call 0xf667eb01 1f: e8 fd 31 93 f6 call 0xf6933221 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 92 39 58 f6 call 0xf65839c1 <-- trapping instruction 2f: 65 8b 05 1b 79 6a 08 mov %gs:0x86a791b(%rip),%eax # 0x86a7951 36: 85 c0 test %eax,%eax 38: 74 06 je 0x40 3a: 5b pop %rbx 3b: e9 ec a9 94 f5 jmp 0xf594aa2c