do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 F2FS-fs (loop0): Stopped filesystem due to reason: 5 BUG: sleeping function called from invalid context at fs/inode.c:1928 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8056, name: syz.0.295 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 3 locks held by syz.0.295/8056: #0: ffff0000cc474420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:508 #1: ffff0000f415c908 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline] #1: ffff0000f415c908 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: do_rmdir+0x174/0x4c4 fs/namei.c:4595 #2: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: f2fs_drop_inode+0x640/0xa90 fs/f2fs/super.c:1822 Preemption disabled at: [] spin_lock include/linux/spinlock.h:351 [inline] [] f2fs_drop_inode+0x640/0xa90 fs/f2fs/super.c:1822 CPU: 1 UID: 0 PID: 8056 Comm: syz.0.295 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 __might_resched+0x348/0x4c4 kernel/sched/core.c:8925 __might_sleep+0x94/0x110 kernel/sched/core.c:8854 iput+0x3c/0xad4 fs/inode.c:1928 f2fs_drop_inode+0x648/0xa90 fs/f2fs/super.c:1823 iput_final fs/inode.c:1884 [inline] iput+0x6e8/0xad4 fs/inode.c:1966 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4561 do_rmdir+0x214/0x4c4 fs/namei.c:4603 __do_sys_unlinkat fs/namei.c:4777 [inline] __se_sys_unlinkat fs/namei.c:4771 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4771 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8056 at fs/inode.c:1933 iput+0x1e8/0xad4 fs/inode.c:1933 Modules linked in: CPU: 1 UID: 0 PID: 8056 Comm: syz.0.295 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : iput+0x1e8/0xad4 fs/inode.c:1933 lr : iput+0x1e8/0xad4 fs/inode.c:1933 sp : ffff8000a53b7a80 x29: ffff8000a53b7aa0 x28: ffff0000d0b23d80 x27: 1fffe0001e82ba57 x26: 0000000000000001 x25: 1ffff00011ee0278 x24: 0000000000000003 x23: dfff800000000000 x22: ffff0000f415d2b8 x21: 1fffe0001e82ba31 x20: ffff0000f415d188 x19: ffff0000f415d0b8 x18: 00000000ffffffff x17: 6d616e202c363530 x16: ffff80008052e2d8 x15: 0000000000000001 x14: 1ffff000125ffd14 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 000000000001bd54 x9 : ffff8000a699e000 x8 : 000000000001bd55 x7 : ffff8000805688d4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000803c40cc x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: iput+0x1e8/0xad4 fs/inode.c:1933 (P) f2fs_drop_inode+0x648/0xa90 fs/f2fs/super.c:1823 iput_final fs/inode.c:1884 [inline] iput+0x6e8/0xad4 fs/inode.c:1966 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4561 do_rmdir+0x214/0x4c4 fs/namei.c:4603 __do_sys_unlinkat fs/namei.c:4777 [inline] __se_sys_unlinkat fs/namei.c:4771 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4771 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 822 hardirqs last enabled at (821): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (822): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (480): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (478): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ============================================ WARNING: possible recursive locking detected syzkaller #0 Tainted: G W -------------------------------------------- syz.0.295/8056 is trying to acquire lock: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: iput+0x2cc/0xad4 fs/inode.c:1951 but task is already holding lock: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: f2fs_drop_inode+0x640/0xa90 fs/f2fs/super.c:1822 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&sb->s_type->i_lock_key#36); lock(&sb->s_type->i_lock_key#36); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by syz.0.295/8056: #0: ffff0000cc474420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:508 #1: ffff0000f415c908 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline] #1: ffff0000f415c908 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: do_rmdir+0x174/0x4c4 fs/namei.c:4595 #2: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff0000f415d150 (&sb->s_type->i_lock_key#36){+.+.}-{3:3}, at: f2fs_drop_inode+0x640/0xa90 fs/f2fs/super.c:1822 stack backtrace: CPU: 1 UID: 0 PID: 8056 Comm: syz.0.295 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_deadlock_bug+0x2e8/0x2f0 kernel/locking/lockdep.c:3041 check_deadlock kernel/locking/lockdep.c:3093 [inline] validate_chain kernel/locking/lockdep.c:3895 [inline] __lock_acquire+0x2940/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] iput+0x2cc/0xad4 fs/inode.c:1951 f2fs_drop_inode+0x648/0xa90 fs/f2fs/super.c:1823 iput_final fs/inode.c:1884 [inline] iput+0x6e8/0xad4 fs/inode.c:1966 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4561 do_rmdir+0x214/0x4c4 fs/namei.c:4603 __do_sys_unlinkat fs/namei.c:4777 [inline] __se_sys_unlinkat fs/namei.c:4771 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4771 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596