loop0: detected capacity change from 0 to 512 EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE EXT4-fs (loop0): 1 truncate cleaned up ====================================================== WARNING: possible circular locking dependency detected 6.7.0-rc7-syzkaller-00049-g453f5db0619e #0 Not tainted ------------------------------------------------------ syz-executor622/5194 is trying to acquire lock: ffff8880763d2740 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] ffff8880763d2740 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x173/0x430 fs/ext4/xattr.c:461 but task is already holding lock: ffff8880763d3608 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0 fs/ext4/inode.c:5440 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:3381 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1446 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1594 [inline] ext4_xattr_set_entry+0x3415/0x3ce0 fs/ext4/xattr.c:1719 ext4_xattr_ibody_set+0x126/0x380 fs/ext4/xattr.c:2287 ext4_xattr_set_handle+0x936/0x1420 fs/ext4/xattr.c:2444 ext4_xattr_set+0x149/0x370 fs/ext4/xattr.c:2558 ext4_xattr_user_set+0xb9/0xf0 fs/ext4/xattr_user.c:41 __vfs_setxattr+0x173/0x1d0 fs/xattr.c:201 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235 __vfs_setxattr_locked+0x17e/0x250 fs/xattr.c:296 vfs_setxattr+0x146/0x350 fs/xattr.c:322 do_setxattr+0x142/0x170 fs/xattr.c:630 setxattr+0x159/0x170 fs/xattr.c:653 path_setxattr+0x175/0x1d0 fs/xattr.c:672 __do_sys_setxattr fs/xattr.c:688 [inline] __se_sys_setxattr fs/xattr.c:684 [inline] __x64_sys_setxattr+0xc4/0x160 fs/xattr.c:684 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #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+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:802 [inline] ext4_xattr_inode_iget+0x173/0x430 fs/ext4/xattr.c:461 ext4_xattr_inode_get+0x170/0x840 fs/ext4/xattr.c:535 ext4_xattr_move_to_block fs/ext4/xattr.c:2640 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2742 [inline] ext4_expand_extra_isize_ea+0x125a/0x1b20 fs/ext4/xattr.c:2834 __ext4_expand_extra_isize+0x342/0x470 fs/ext4/inode.c:5812 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5855 [inline] __ext4_mark_inode_dirty+0x52b/0x810 fs/ext4/inode.c:5933 ext4_setattr+0x1c08/0x29d0 fs/ext4/inode.c:5443 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3280 [inline] do_open fs/namei.c:3626 [inline] path_openat+0x2597/0x2c50 fs/namei.c:3779 do_filp_open+0x1de/0x430 fs/namei.c:3809 do_sys_openat2+0x176/0x1e0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1528 [inline] __se_sys_creat fs/open.c:1522 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1522 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b 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-executor622/5194: #0: ffff888020622418 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3615 [inline] #0: ffff888020622418 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x2112/0x2c50 fs/namei.c:3779 #1: ffff8880763d3780 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff8880763d3780 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:64 #2: ffff8880763d3920 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #2: ffff8880763d3920 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xdf1/0x29d0 fs/ext4/inode.c:5401 #3: ffff8880763d3608 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b94/0x29d0 fs/ext4/inode.c:5440 #4: ffff8880763d3448 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff8880763d3448 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5852 [inline] #4: ffff8880763d3448 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x810 fs/ext4/inode.c:5933 stack backtrace: CPU: 0 PID: 5194 Comm: syz-executor622 Not tainted 6.7.0-rc7-syzkaller-00049-g453f5db0619e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x317/0x400 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+0x2433/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:802 [inline] ext4_xattr_inode_iget+0x173/0x430 fs/ext4/xattr.c:461 ext4_xattr_inode_get+0x170/0x840 fs/ext4/xattr.c:535 ext4_xattr_move_to_block fs/ext4/xattr.c:2640 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2742 [inline] ext4_expand_extra_isize_ea+0x125a/0x1b20 fs/ext4/xattr.c:2834 __ext4_expand_extra_isize+0x342/0x470 fs/ext4/inode.c:5812 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5855 [inline] __ext4_mark_inode_dirty+0x52b/0x810 fs/ext4/inode.c:5933 ext4_setattr+0x1c08/0x29d0 fs/ext4/inode.c:5443 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3280 [inline] do_open fs/namei.c:3626 [inline] path_openat+0x2597/0x2c50 fs/namei.c:3779 do_filp_open+0x1de/0x430 fs/namei.c:3809 do_sys_openat2+0x176/0x1e0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1528 [inline] __se_sys_creat fs/open.c:1522 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1522 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f3b7de99169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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:00007ffd97a88028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f3b7de99169 RDX: 00007f3b7de99169 RSI: 0000000000000108 RDI: 0000000020000000 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd97a88070 R13: 00007ffd97a880b0 R14: 0000000000040000 R15: 0000000000000003