F2FS-fs (loop0): Invalid log_blocksize (268), supports only 12 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 6.4.0-rc1-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/2512 is trying to acquire lock: ffff88817cd51860 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] ffff88817cd51860 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_getxattr+0x63/0x6c0 fs/f2fs/xattr.c:532 but task is already holding lock: ffff88817ce10d70 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] ffff88817ce10d70 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x20/0xa0 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+0x29/0xb0 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] f2fs_add_inline_entry+0x134/0x270 fs/f2fs/inline.c:644 f2fs_add_dentry fs/f2fs/dir.c:784 [inline] f2fs_do_add_link+0x1a9/0x2b0 fs/f2fs/dir.c:827 f2fs_add_link fs/f2fs/f2fs.h:3555 [inline] f2fs_create+0xe9/0x180 fs/f2fs/namei.c:377 lookup_open fs/namei.c:3492 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0x4f7/0xd00 fs/namei.c:3788 do_filp_open+0xac/0x150 fs/namei.c:3818 do_sys_openat2+0x89/0x160 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x7c/0xa0 fs/open.c:1383 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 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:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x146c/0x2880 kernel/locking/lockdep.c:5074 lock_acquire+0xea/0x260 kernel/locking/lockdep.c:5691 down_read+0x2c/0x40 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0x63/0x6c0 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x39/0x2a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0x3b/0x340 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x29b/0x470 fs/f2fs/dir.c:558 f2fs_do_tmpfile+0x32/0xa0 fs/f2fs/dir.c:839 __f2fs_tmpfile+0xdf/0x1c0 fs/f2fs/namei.c:884 f2fs_ioc_start_atomic_write+0x1f2/0x300 fs/f2fs/file.c:2104 __f2fs_ioctl+0x1660/0x31f0 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x6a/0xb0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 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.0/2512: #0: ffff888108e82450 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write_file+0x16/0x60 fs/namespace.c:438 #1: ffff88817ce10150 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88817ce10150 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write+0x8c/0x300 fs/f2fs/file.c:2065 #2: ffff88817ce10728 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] #2: ffff88817ce10728 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write+0x138/0x300 fs/f2fs/file.c:2079 #3: ffff88810e2fa3a8 (&sbi->cp_rwsem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] #3: ffff88810e2fa3a8 (&sbi->cp_rwsem){.+.+}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2151 [inline] #3: ffff88810e2fa3a8 (&sbi->cp_rwsem){.+.+}-{3:3}, at: __f2fs_tmpfile+0xc5/0x1c0 fs/f2fs/namei.c:879 #4: ffff88817ce10d70 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline] #4: ffff88817ce10d70 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x20/0xa0 fs/f2fs/dir.c:838 stack backtrace: CPU: 0 PID: 2512 Comm: syz-executor.0 Not tainted 6.4.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xe0 lib/dump_stack.c:106 print_circular_bug+0x314/0x350 kernel/locking/lockdep.c:2066 check_noncircular+0x106/0x110 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x146c/0x2880 kernel/locking/lockdep.c:5074 lock_acquire+0xea/0x260 kernel/locking/lockdep.c:5691 down_read+0x2c/0x40 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2108 [inline] f2fs_getxattr+0x63/0x6c0 fs/f2fs/xattr.c:532 __f2fs_get_acl+0x39/0x2a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:377 [inline] f2fs_init_acl+0x3b/0x340 fs/f2fs/acl.c:420 f2fs_init_inode_metadata+0x29b/0x470 fs/f2fs/dir.c:558 f2fs_do_tmpfile+0x32/0xa0 fs/f2fs/dir.c:839 __f2fs_tmpfile+0xdf/0x1c0 fs/f2fs/namei.c:884 f2fs_ioc_start_atomic_write+0x1f2/0x300 fs/f2fs/file.c:2104 __f2fs_ioctl+0x1660/0x31f0 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x6a/0xb0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f778867cb29 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:00007f77894720c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f778879bf80 RCX: 00007f778867cb29 RDX: 0000000000000000 RSI: 000000000000f501 RDI: 0000000000000004 RBP: 00007f77886c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f778879bf80 R15: 00007ffdc2b54178