====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Not tainted ------------------------------------------------------ syz.1.1975/15420 is trying to acquire lock: ffff8880677fe800 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] ffff8880677fe800 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x173/0x440 fs/ext4/xattr.c:461 but task is already holding lock: ffff88805665be88 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1a66/0x2700 fs/ext4/inode.c:5410 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem/3){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_update_i_disksize fs/ext4/ext4.h:3386 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1446 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1596 [inline] ext4_xattr_inode_lookup_create+0x13d9/0x1900 fs/ext4/xattr.c:1568 ext4_xattr_ibody_set+0x1d9/0x5b0 fs/ext4/xattr.c:2263 ext4_xattr_set_handle+0x939/0x1420 fs/ext4/xattr.c:2440 ext4_xattr_set+0x149/0x380 fs/ext4/xattr.c:2554 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x146/0x350 fs/xattr.c:321 do_setxattr+0x146/0x170 fs/xattr.c:629 setxattr+0x15d/0x180 fs/xattr.c:652 path_setxattr+0x179/0x1e0 fs/xattr.c:671 __do_sys_setxattr fs/xattr.c:687 [inline] __se_sys_setxattr fs/xattr.c:683 [inline] __x64_sys_setxattr+0xc4/0x160 fs/xattr.c:683 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:791 [inline] ext4_xattr_inode_iget+0x173/0x440 fs/ext4/xattr.c:461 ext4_xattr_inode_get+0x16c/0x870 fs/ext4/xattr.c:535 ext4_xattr_move_to_block fs/ext4/xattr.c:2636 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2738 [inline] ext4_expand_extra_isize_ea+0x1367/0x1ae0 fs/ext4/xattr.c:2830 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5782 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5825 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5903 ext4_setattr+0x1ada/0x2700 fs/ext4/inode.c:5413 notify_change+0x742/0x11f0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 handle_truncate fs/namei.c:3308 [inline] do_open fs/namei.c:3654 [inline] path_openat+0x2505/0x29f0 fs/namei.c:3807 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_creat fs/open.c:1496 [inline] __se_sys_creat fs/open.c:1490 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1490 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 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#7/1); lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#7/1); *** DEADLOCK *** 5 locks held by syz.1.1975/15420: #0: ffff888067892420 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3643 [inline] #0: ffff888067892420 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1ff9/0x29f0 fs/namei.c:3807 #1: ffff88805665c000 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff88805665c000 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:63 #2: ffff88805665c1a0 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #2: ffff88805665c1a0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xc24/0x2700 fs/ext4/inode.c:5371 #3: ffff88805665be88 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1a66/0x2700 fs/ext4/inode.c:5410 #4: ffff88805665bcc8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff88805665bcc8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5822 [inline] #4: ffff88805665bcc8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4cf/0x890 fs/ext4/inode.c:5903 stack backtrace: CPU: 0 PID: 15420 Comm: syz.1.1975 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:791 [inline] ext4_xattr_inode_iget+0x173/0x440 fs/ext4/xattr.c:461 ext4_xattr_inode_get+0x16c/0x870 fs/ext4/xattr.c:535 ext4_xattr_move_to_block fs/ext4/xattr.c:2636 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2738 [inline] ext4_expand_extra_isize_ea+0x1367/0x1ae0 fs/ext4/xattr.c:2830 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5782 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5825 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5903 ext4_setattr+0x1ada/0x2700 fs/ext4/inode.c:5413 notify_change+0x742/0x11f0 fs/attr.c:497 do_truncate+0x15c/0x220 fs/open.c:65 handle_truncate fs/namei.c:3308 [inline] do_open fs/namei.c:3654 [inline] path_openat+0x2505/0x29f0 fs/namei.c:3807 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_creat fs/open.c:1496 [inline] __se_sys_creat fs/open.c:1490 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1490 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcca7175ae9 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:00007fcca8005048 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fcca7304070 RCX: 00007fcca7175ae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007fcca71f6746 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fcca7304070 R15: 00007ffc214d5a28