EXT4-fs (loop8): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #0 Not tainted ------------------------------------------------------ syz.8.3518/16623 is trying to acquire lock: ffff88805b923f68 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] ffff88805b923f68 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ffff88805b923f68 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_lookup_create+0x1a86/0x1f90 fs/ext4/xattr.c:1596 but task is already holding lock: ffff88805b926598 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x14bf/0x1bc0 fs/ext4/inode.c:5459 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem/3){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ext4_update_i_disksize fs/ext4/ext4.h:3398 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1452 [inline] ext4_xattr_inode_lookup_create+0x1707/0x1f90 fs/ext4/xattr.c:1602 ext4_xattr_block_set+0x274/0x3980 fs/ext4/xattr.c:1916 ext4_xattr_set_handle+0xce0/0x1580 fs/ext4/xattr.c:2458 ext4_xattr_set+0x280/0x3e0 fs/ext4/xattr.c:2560 __vfs_setxattr+0x46a/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:629 [inline] path_setxattr+0x37e/0x4d0 fs/xattr.c:658 __do_sys_setxattr fs/xattr.c:676 [inline] __se_sys_setxattr fs/xattr.c:672 [inline] __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:672 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create+0x1a86/0x1f90 fs/ext4/xattr.c:1596 ext4_xattr_block_set+0x274/0x3980 fs/ext4/xattr.c:1916 ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline] ext4_expand_extra_isize_ea+0x12d7/0x1cf0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5831 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5874 [inline] __ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:5952 ext4_setattr+0x1552/0x1bc0 fs/ext4/inode.c:5462 notify_change+0xbcc/0xe90 fs/attr.c:503 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_creat fs/open.c:1508 [inline] __se_sys_creat fs/open.c:1502 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1502 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#8/1); lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#8/1); *** DEADLOCK *** 5 locks held by syz.8.3518/16623: #0: ffff8880786b0420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff88805b926708 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff88805b926708 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63 #2: ffff88805b9268a8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #2: ffff88805b9268a8 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xf35/0x1bc0 fs/ext4/inode.c:5420 #3: ffff88805b926598 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x14bf/0x1bc0 fs/ext4/inode.c:5459 #4: ffff88805b9263d8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:161 [inline] #4: ffff88805b9263d8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5871 [inline] #4: ffff88805b9263d8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x491/0x880 fs/ext4/inode.c:5952 stack backtrace: CPU: 0 UID: 0 PID: 16623 Comm: syz.8.3518 Not tainted 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create+0x1a86/0x1f90 fs/ext4/xattr.c:1596 ext4_xattr_block_set+0x274/0x3980 fs/ext4/xattr.c:1916 ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline] ext4_expand_extra_isize_ea+0x12d7/0x1cf0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5831 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5874 [inline] __ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:5952 ext4_setattr+0x1552/0x1bc0 fs/ext4/inode.c:5462 notify_change+0xbcc/0xe90 fs/attr.c:503 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_creat fs/open.c:1508 [inline] __se_sys_creat fs/open.c:1502 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1502 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f05c7b7e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f05c8899038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f05c7d35f80 RCX: 00007f05c7b7e719 RDX: 0000000000000000 RSI: 00000000000001ad RDI: 0000000020000140 RBP: 00007f05c7bf175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f05c7d35f80 R15: 00007fff1fbf0f18