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 6.6.0-rc3-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor259/5276 is trying to acquire lock: ffff888031d89680 (&ea_inode->i_rwsem#7/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] ffff888031d89680 (&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: ffff888031d8a548 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b6f/0x2990 fs/ext4/inode.c:5431 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+0x93/0x200 kernel/locking/rwsem.c:1573 ext4_update_i_disksize fs/ext4/ext4.h:3369 [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+0x33dd/0x3ca0 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+0x1a3/0x1d0 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:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #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:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 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:5803 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5846 [inline] __ext4_mark_inode_dirty+0x52b/0x800 fs/ext4/inode.c:5924 ext4_setattr+0x1be3/0x2990 fs/ext4/inode.c:5434 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3298 [inline] do_open fs/namei.c:3643 [inline] path_openat+0x23f1/0x29c0 fs/namei.c:3796 do_filp_open+0x1de/0x430 fs/namei.c:3823 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_creat fs/open.c:1513 [inline] __se_sys_creat fs/open.c:1507 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1507 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 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/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-executor259/5276: #0: ffff88802ad74410 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3632 [inline] #0: ffff88802ad74410 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1e7c/0x29c0 fs/namei.c:3796 #1: ffff888031d8a6c0 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888031d8a6c0 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:64 #2: ffff888031d8a860 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #2: ffff888031d8a860 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xdf1/0x2990 fs/ext4/inode.c:5393 #3: ffff888031d8a548 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x1b6f/0x2990 fs/ext4/inode.c:5431 #4: ffff888031d8a388 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff888031d8a388 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5843 [inline] #4: ffff888031d8a388 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x800 fs/ext4/inode.c:5924 stack backtrace: CPU: 1 PID: 5276 Comm: syz-executor259 Not tainted 6.6.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 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:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 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:5803 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5846 [inline] __ext4_mark_inode_dirty+0x52b/0x800 fs/ext4/inode.c:5924 ext4_setattr+0x1be3/0x2990 fs/ext4/inode.c:5434 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3298 [inline] do_open fs/namei.c:3643 [inline] path_openat+0x23f1/0x29c0 fs/namei.c:3796 do_filp_open+0x1de/0x430 fs/namei.c:3823 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_creat fs/open.c:1513 [inline] __se_sys_creat fs/open.c:1507 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1507 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1d313451a9 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:00007ffc4d170ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f1d313451a9 RDX: 00007f1d313451a9 RSI: 0000000000000008 RDI: 0000000020000400 RBP: 0000000000000004 R08: 0000000000010000 R09: 0000000000010000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc4d170b00 R13: 00007ffc4d170b40 R14: 0000000000040000 R15: 0000000000000003