loop3: detected capacity change from 0 to 512 EXT4-fs: Ignoring removed oldalloc option EXT4-fs: Ignoring removed nobh option ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.6569/30900 is trying to acquire lock: ffff888053dd4c18 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x20f/0x2f40 fs/ext4/inode.c:2717 but task is already holding lock: ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6043 [inline] ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3fe/0x770 fs/ext4/inode.c:6124 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->xattr_sem){++++}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] ext4_destroy_inline_data+0x24/0xe0 fs/ext4/inline.c:1922 ext4_writepages+0x670/0x2f40 fs/ext4/inode.c:2763 do_writepages+0x3ba/0x640 mm/page-writeback.c:2491 filemap_fdatawrite_wbc+0x11e/0x180 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] file_write_and_wait_range+0x159/0x230 mm/filemap.c:774 ext4_sync_file+0x23b/0xca0 fs/ext4/fsync.c:151 generic_write_sync include/linux/fs.h:2962 [inline] ext4_buffered_write_iter+0x2f6/0x390 fs/ext4/file.c:292 ext4_file_write_iter+0x1cf/0x1710 fs/ext4/file.c:-1 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x642/0xb10 fs/read_write.c:861 iter_file_splice_write+0x699/0xcc0 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe1/0x130 fs/splice.c:950 splice_direct_to_actor+0x48b/0xb90 fs/splice.c:896 do_splice_direct+0x1ce/0x2f0 fs/splice.c:1002 generic_copy_file_range fs/read_write.c:1393 [inline] vfs_copy_file_range+0xa42/0x14c0 fs/read_write.c:1539 __do_sys_copy_file_range fs/read_write.c:1596 [inline] __se_sys_copy_file_range+0x320/0x470 fs/read_write.c:1559 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&sbi->s_writepages_rwsem){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 percpu_down_read+0x44/0x1a0 include/linux/percpu-rwsem.h:51 ext4_writepages+0x20f/0x2f40 fs/ext4/inode.c:2717 do_writepages+0x3ba/0x640 mm/page-writeback.c:2491 __writeback_single_inode+0x156/0x1160 fs/fs-writeback.c:1622 writeback_single_inode+0x3cb/0x8e0 fs/fs-writeback.c:1743 write_inode_now+0x17f/0x210 fs/fs-writeback.c:2786 iput_final fs/inode.c:1821 [inline] iput+0x613/0x980 fs/inode.c:1860 ext4_xattr_block_set+0x273b/0x32b0 fs/ext4/xattr.c:2146 ext4_xattr_move_to_block fs/ext4/xattr.c:2611 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2686 [inline] ext4_expand_extra_isize_ea+0x120b/0x1dc0 fs/ext4/xattr.c:2774 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:6003 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6046 [inline] __ext4_mark_inode_dirty+0x47f/0x770 fs/ext4/inode.c:6124 ext4_evict_inode+0xa7f/0x1110 fs/ext4/inode.c:281 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->xattr_sem); lock(&sbi->s_writepages_rwsem); lock(&ei->xattr_sem); lock(&sbi->s_writepages_rwsem); *** DEADLOCK *** 3 locks held by syz.3.6569/30900: #0: ffff88801f30c0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228 #1: ffff88801f30c650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1891 [inline] #1: ffff88801f30c650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:2013 [inline] #1: ffff88801f30c650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x43c/0x1110 fs/ext4/inode.c:242 #2: ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] #2: ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6043 [inline] #2: ffff888054a31ee0 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3fe/0x770 fs/ext4/inode.c:6124 stack backtrace: CPU: 0 PID: 30900 Comm: syz.3.6569 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2d07/0x7d10 kernel/locking/lockdep.c:5049 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 percpu_down_read+0x44/0x1a0 include/linux/percpu-rwsem.h:51 ext4_writepages+0x20f/0x2f40 fs/ext4/inode.c:2717 do_writepages+0x3ba/0x640 mm/page-writeback.c:2491 __writeback_single_inode+0x156/0x1160 fs/fs-writeback.c:1622 writeback_single_inode+0x3cb/0x8e0 fs/fs-writeback.c:1743 write_inode_now+0x17f/0x210 fs/fs-writeback.c:2786 iput_final fs/inode.c:1821 [inline] iput+0x613/0x980 fs/inode.c:1860 ext4_xattr_block_set+0x273b/0x32b0 fs/ext4/xattr.c:2146 ext4_xattr_move_to_block fs/ext4/xattr.c:2611 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2686 [inline] ext4_expand_extra_isize_ea+0x120b/0x1dc0 fs/ext4/xattr.c:2774 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:6003 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6046 [inline] __ext4_mark_inode_dirty+0x47f/0x770 fs/ext4/inode.c:6124 ext4_evict_inode+0xa7f/0x1110 fs/ext4/inode.c:281 evict+0x4c9/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbeb/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5574 [inline] ext4_fill_super+0x6ee3/0x78c0 fs/ext4/super.c:5693 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5815b9e04a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5816b0ce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5816b0cee0 RCX: 00007f5815b9e04a RDX: 00002000000001c0 RSI: 0000200000000b80 RDI: 00007f5816b0cea0 RBP: 00002000000001c0 R08: 00007f5816b0cee0 R09: 0000000000800744 R10: 0000000000800744 R11: 0000000000000246 R12: 0000200000000b80 R13: 00007f5816b0cea0 R14: 000000000000047a R15: 000000000000002c EXT4-fs error (device loop3): ext4_xattr_inode_iget:401: inode #11: comm syz.3.6569: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:406: comm syz.3.6569: error while reading EA inode 11 err=-117 EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs warning (device loop3): ext4_expand_extra_isize_ea:2800: Unable to expand inode 15. Delete some EAs or run e2fsck. EXT4-fs error (device loop3): ext4_xattr_inode_iget:401: inode #11: comm syz.3.6569: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:406: comm syz.3.6569: error while reading EA inode 11 err=-117 EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:401: inode #18: comm syz.3.6569: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:406: comm syz.3.6569: error while reading EA inode 18 err=-117 EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:401: inode #18: comm syz.3.6569: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs error (device loop3): ext4_xattr_inode_iget:406: comm syz.3.6569: error while reading EA inode 18 err=-117 EXT4-fs (loop3): Remounting filesystem read-only EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none. EXT4-fs error (device loop3): __ext4_iget:5102: inode #14: block 1886221359: comm syz.3.6569: invalid block EXT4-fs (loop3): Remounting filesystem read-only