loop0: detected capacity change from 0 to 40427 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 6.1.42-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor272/3538 is trying to acquire lock: ffff8880744510a8 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] ffff8880744510a8 (&fi->i_xattr_sem){.+.+}-{3:3}, at: f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:531 but task is already holding lock: ffff888075fd16f8 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2179 [inline] ffff888075fd16f8 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x21/0x160 fs/f2fs/dir.c:869 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&fi->i_sem){+.+.}-{3:3}: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 f2fs_down_write fs/f2fs/f2fs.h:2179 [inline] f2fs_add_inline_entry+0x3a4/0x760 fs/f2fs/inline.c:645 f2fs_add_dentry+0xb6/0x1e0 fs/f2fs/dir.c:815 f2fs_do_add_link+0x21a/0x340 fs/f2fs/dir.c:858 f2fs_add_link fs/f2fs/f2fs.h:3530 [inline] f2fs_create+0x749/0xa10 fs/f2fs/namei.c:367 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3711 do_filp_open+0x230/0x480 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_creat fs/open.c:1410 [inline] __se_sys_creat fs/open.c:1404 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1404 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:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 down_read+0x43/0x2e0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:531 __f2fs_get_acl+0x52/0x8a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:375 [inline] f2fs_init_acl+0xd3/0x960 fs/f2fs/acl.c:418 f2fs_init_inode_metadata+0xaa0/0x11d0 fs/f2fs/dir.c:587 f2fs_do_tmpfile+0x30/0x160 fs/f2fs/dir.c:870 __f2fs_tmpfile+0x1f9/0x380 fs/f2fs/namei.c:874 f2fs_ioc_start_atomic_write fs/f2fs/file.c:2107 [inline] __f2fs_ioctl+0x9a02/0xbf70 fs/f2fs/file.c:4171 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 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); lock(&fi->i_xattr_sem); *** DEADLOCK *** 5 locks held by syz-executor272/3538: #0: ffff888076186460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:437 #1: ffff888075fd0a38 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff888075fd0a38 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write fs/f2fs/file.c:2068 [inline] #1: ffff888075fd0a38 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: __f2fs_ioctl+0x4142/0xbf70 fs/f2fs/file.c:4171 #2: ffff888075fd1010 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2179 [inline] #2: ffff888075fd1010 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: f2fs_ioc_start_atomic_write fs/f2fs/file.c:2082 [inline] #2: ffff888075fd1010 (&fi->i_gc_rwsem[WRITE]){+.+.}-{3:3}, at: __f2fs_ioctl+0x5457/0xbf70 fs/f2fs/file.c:4171 #3: ffff88807d1803b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] #3: ffff88807d1803b0 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2197 [inline] #3: ffff88807d1803b0 (&sbi->cp_rwsem){++++}-{3:3}, at: __f2fs_tmpfile+0x1ce/0x380 fs/f2fs/namei.c:869 #4: ffff888075fd16f8 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2179 [inline] #4: ffff888075fd16f8 (&fi->i_sem){+.+.}-{3:3}, at: f2fs_do_tmpfile+0x21/0x160 fs/f2fs/dir.c:869 stack backtrace: CPU: 1 PID: 3538 Comm: syz-executor272 Not tainted 6.1.42-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 down_read+0x43/0x2e0 kernel/locking/rwsem.c:1520 f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] f2fs_getxattr+0xb4/0x1460 fs/f2fs/xattr.c:531 __f2fs_get_acl+0x52/0x8a0 fs/f2fs/acl.c:179 f2fs_acl_create fs/f2fs/acl.c:375 [inline] f2fs_init_acl+0xd3/0x960 fs/f2fs/acl.c:418 f2fs_init_inode_metadata+0xaa0/0x11d0 fs/f2fs/dir.c:587 f2fs_do_tmpfile+0x30/0x160 fs/f2fs/dir.c:870 __f2fs_tmpfile+0x1f9/0x380 fs/f2fs/namei.c:874 f2fs_ioc_start_atomic_write fs/f2fs/file.c:2107 [inline] __f2fs_ioctl+0x9a02/0xbf70 fs/f2fs/file.c:4171 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 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: 0033:0x7fa316d78639 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: