====================================================== WARNING: possible circular locking dependency detected 6.1.28-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/6694 is trying to acquire lock: ffff8880417aa218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] ffff8880417aa218 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x4a3/0x5e0 fs/ext4/xattr.c:438 but task is already holding lock: ffff8880417ac8c0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x13fa/0x1a00 fs/ext4/inode.c:5521 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+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 ext4_update_i_disksize fs/ext4/ext4.h:3383 [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+0xb0e/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:2509 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x250/0x2b0 fs/xattr.c:617 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648 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 (&ea_inode->i_rwsem#8/1){+.+.}-{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_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:756 [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:2590 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2692 [inline] ext4_expand_extra_isize_ea+0xe77/0x1bc0 fs/ext4/xattr.c:2784 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5893 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5936 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6014 ext4_setattr+0x1493/0x1a00 fs/ext4/inode.c:5524 notify_change+0xdcd/0x1080 fs/attr.c:482 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x27e2/0x2e60 fs/namei.c:3714 do_filp_open+0x230/0x480 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 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(&ei->i_data_sem); lock(&ea_inode->i_rwsem#8/1); lock(&ei->i_data_sem); lock(&ea_inode->i_rwsem#8/1); *** DEADLOCK *** 5 locks held by syz-executor.1/6694: #0: ffff8880484cc460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393 #1: ffff8880417aca38 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff8880417aca38 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 #2: ffff8880417acbd8 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #2: ffff8880417acbd8 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xec7/0x1a00 fs/ext4/inode.c:5481 #3: ffff8880417ac8c0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x13fa/0x1a00 fs/ext4/inode.c:5521 #4: ffff8880417ac700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff8880417ac700 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5933 [inline] #4: ffff8880417ac700 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4b0/0x920 fs/ext4/inode.c:6014 stack backtrace: CPU: 0 PID: 6694 Comm: syz-executor.1 Not tainted 6.1.28-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+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_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:756 [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:2590 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2692 [inline] ext4_expand_extra_isize_ea+0xe77/0x1bc0 fs/ext4/xattr.c:2784 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5893 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5936 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6014 ext4_setattr+0x1493/0x1a00 fs/ext4/inode.c:5524 notify_change+0xdcd/0x1080 fs/attr.c:482 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x27e2/0x2e60 fs/namei.c:3714 do_filp_open+0x230/0x480 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 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: 0033:0x7effbce8c169 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:00007effbdc49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007effbcfac050 RCX: 00007effbce8c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007effbcee7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5c6c098f R14: 00007effbdc49300 R15: 0000000000022000