====================================================== WARNING: possible circular locking dependency detected 5.15.111-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/18986 is trying to acquire lock: ffff8880312749b8 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] ffff8880312749b8 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x4a3/0x5e0 fs/ext4/xattr.c:438 but task is already holding lock: ffff888031270278 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x12e8/0x1990 fs/ext4/inode.c:5485 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 ext4_update_i_disksize fs/ext4/ext4.h:3407 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1413 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1562 [inline] ext4_xattr_set_entry+0x3187/0x3c00 fs/ext4/xattr.c:1686 ext4_xattr_block_set+0xb10/0x3680 fs/ext4/xattr.c:1992 ext4_xattr_set_handle+0xdac/0x1560 fs/ext4/xattr.c:2407 ext4_xattr_set+0x231/0x3d0 fs/ext4/xattr.c:2508 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x27e/0x2e0 fs/xattr.c:611 path_setxattr+0x1bc/0x2a0 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:642 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+0x61/0xcb -> #0 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 inode_lock include/linux/fs.h:787 [inline] ext4_xattr_inode_iget+0x4a3/0x5e0 fs/ext4/xattr.c:438 ext4_xattr_inode_get+0x17d/0x9a0 fs/ext4/xattr.c:501 ext4_xattr_move_to_block fs/ext4/xattr.c:2589 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xe77/0x1bc0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5826 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5869 [inline] __ext4_mark_inode_dirty+0x539/0x860 fs/ext4/inode.c:5947 ext4_setattr+0x1374/0x1990 fs/ext4/inode.c:5488 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 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+0x61/0xcb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem); lock(&ea_inode->i_rwsem#9/1); lock(&ei->i_data_sem); lock(&ea_inode->i_rwsem#9/1); *** DEADLOCK *** 5 locks held by syz-executor.1/18986: #0: ffff88801d8e6460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff8880312703f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff8880312703f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 #2: ffff888031270590 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline] #2: ffff888031270590 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xd6c/0x1990 fs/ext4/inode.c:5445 #3: ffff888031270278 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x12e8/0x1990 fs/ext4/inode.c:5485 #4: ffff8880312700c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff8880312700c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5866 [inline] #4: ffff8880312700c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a0/0x860 fs/ext4/inode.c:5947 stack backtrace: CPU: 0 PID: 18986 Comm: syz-executor.1 Not tainted 5.15.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 inode_lock include/linux/fs.h:787 [inline] ext4_xattr_inode_iget+0x4a3/0x5e0 fs/ext4/xattr.c:438 ext4_xattr_inode_get+0x17d/0x9a0 fs/ext4/xattr.c:501 ext4_xattr_move_to_block fs/ext4/xattr.c:2589 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xe77/0x1bc0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5826 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5869 [inline] __ext4_mark_inode_dirty+0x539/0x860 fs/ext4/inode.c:5947 ext4_setattr+0x1374/0x1990 fs/ext4/inode.c:5488 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_creat fs/open.c:1301 [inline] __se_sys_creat fs/open.c:1295 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1295 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+0x61/0xcb RIP: 0033:0x7f507b0ad169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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: 002b:00007f507123e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f507b1cd050 RCX: 00007f507b0ad169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f507b108ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffdb76833f R14: 00007f507123e300 R15: 0000000000022000