F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Try to recover 1th superblock, ret: 0 F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 ====================================================== WARNING: possible circular locking dependency detected 6.5.0-rc3-syzkaller-00275-gffabf7c73176 #0 Not tainted ------------------------------------------------------ syz-executor.0/5435 is trying to acquire lock: ffff888075381978 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] ffff888075381978 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:532 but task is already holding lock: ffff888072898528 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] ffff888072898528 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x21/0x160 fs/f2fs/dir.c:838 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&fi->i_sem){+.+.}-{3:3}: down_write+0x36/0x50 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] f2fs_add_inline_entry+0x3a4/0x760 fs/f2fs/inline.c:644 f2fs_add_dentry+0xb6/0x1e0 fs/f2fs/dir.c:784 f2fs_do_add_link+0x21a/0x340 fs/f2fs/dir.c:827 f2fs_add_link fs/f2fs/f2fs.h:3554 [inline] f2fs_create+0x328/0x530 fs/f2fs/namei.c:377 lookup_open fs/namei.c:3492 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0x13e3/0x3180 fs/namei.c:3790 do_filp_open+0x230/0x480 fs/namei.c:3820 do_sys_openat2+0x13a/0x1c0 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_creat fs/open.c:1498 [inline] __se_sys_creat fs/open.c:1492 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&fi->i_xattr_sem){.+.+}-{3:3}: check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x39fb/0x7f70 kernel/locking/lockdep.c:5144 lock_acquire+0x1df/0x520 kernel/locking/lockdep.c:5761 down_read+0x43/0x2e0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x52/0x8a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0xd3/0x950 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x820/0x1180 fs/f2fs/dir.c:558 f2fs_do_tmpfile+0x30/0x160 fs/f2fs/dir.c:839 __f2fs_tmpfile+0x1f9/0x380 fs/f2fs/namei.c:884 f2fs_ioc_start_atomic_write+0x4a3/0x9e0 fs/f2fs/file.c:2099 __f2fs_ioctl+0x1419/0xb690 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&fi->i_sem); lock(&fi->i_xattr_sem); lock(&fi->i_sem); rlock(&fi->i_xattr_sem); *** DEADLOCK *** 5 locks held by syz-executor.0/5435: #0: ffff8880783d8410 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write_file+0x5d/0x1f0 fs/namespace.c:447 #1: ffff888075381bd8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888075381bd8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write+0x1b2/0x9e0 fs/f2fs/file.c:2060 #2: ffff8880753821b8 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] #2: ffff8880753821b8 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write+0x276/0x9e0 fs/f2fs/file.c:2074 #3: ffff8880153fc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] #3: ffff8880153fc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2151 [inline] #3: ffff8880153fc3b0 (&sbi->cp_rwsem){++++}-{3:3}, at: __f2fs_tmpfile+0x1ce/0x380 fs/f2fs/namei.c:879 #4: ffff888072898528 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] #4: ffff888072898528 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x21/0x160 fs/f2fs/dir.c:838 stack backtrace: CPU: 0 PID: 5435 Comm: syz-executor.0 Not tainted 6.5.0-rc3-syzkaller-00275-gffabf7c73176 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x371/0x4a0 kernel/locking/lockdep.c:2195 check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x39fb/0x7f70 kernel/locking/lockdep.c:5144 lock_acquire+0x1df/0x520 kernel/locking/lockdep.c:5761 down_read+0x43/0x2e0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x52/0x8a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0xd3/0x950 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x820/0x1180 fs/f2fs/dir.c:558 f2fs_do_tmpfile+0x30/0x160 fs/f2fs/dir.c:839 __f2fs_tmpfile+0x1f9/0x380 fs/f2fs/namei.c:884 f2fs_ioc_start_atomic_write+0x4a3/0x9e0 fs/f2fs/file.c:2099 __f2fs_ioctl+0x1419/0xb690 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdfd1c7cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdfd29ea0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdfd1d9bf80 RCX: 00007fdfd1c7cb29 RDX: 0000000000000000 RSI: 000000000000f501 RDI: 0000000000000004 RBP: 00007fdfd1cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdfd1d9bf80 R15: 00007ffd4439bcf8