loop8: detected capacity change from 0 to 512 EXT4-fs (loop8): Ignoring removed oldalloc option EXT4-fs (loop8): Ignoring removed nobh option ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.8.989/9324 is trying to acquire lock: ffff8880579b6c58 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x213/0x2d40 fs/ext4/inode.c:2691 but task is already holding lock: ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5964 [inline] ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3bd/0x6c0 fs/ext4/inode.c:6045 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->xattr_sem){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] ext4_destroy_inline_data+0x24/0xe0 fs/ext4/inline.c:1900 ext4_writepages+0x599/0x2d40 fs/ext4/inode.c:2737 do_writepages+0x493/0x700 mm/page-writeback.c:2386 filemap_fdatawrite_wbc+0x1eb/0x240 mm/filemap.c:400 __filemap_fdatawrite_range mm/filemap.c:433 [inline] file_write_and_wait_range+0x14d/0x220 mm/filemap.c:810 ext4_sync_file+0x20e/0xb10 fs/ext4/fsync.c:151 generic_write_sync include/linux/fs.h:2990 [inline] ext4_buffered_write_iter+0x323/0x3a0 fs/ext4/file.c:275 ext4_file_write_iter+0x73f/0x1720 fs/ext4/file.c:-1 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x748/0xd70 fs/read_write.c:594 ksys_pwrite64 fs/read_write.c:701 [inline] __do_sys_pwrite64 fs/read_write.c:711 [inline] __se_sys_pwrite64 fs/read_write.c:708 [inline] __x64_sys_pwrite64+0x197/0x220 fs/read_write.c:708 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&sbi->s_writepages_rwsem){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 percpu_down_read+0x46/0x1b0 include/linux/percpu-rwsem.h:51 ext4_writepages+0x213/0x2d40 fs/ext4/inode.c:2691 do_writepages+0x493/0x700 mm/page-writeback.c:2386 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1657 writeback_single_inode+0x3d2/0x8e0 fs/fs-writeback.c:1770 write_inode_now+0x23b/0x2c0 fs/fs-writeback.c:2817 iput_final fs/inode.c:1756 [inline] iput+0x599/0x880 fs/inode.c:1795 ext4_xattr_set_entry+0x1d76/0x3f70 fs/ext4/xattr.c:1827 ext4_xattr_block_set+0x4d7/0x2ce0 fs/ext4/xattr.c:1926 ext4_xattr_move_to_block fs/ext4/xattr.c:2620 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2695 [inline] ext4_expand_extra_isize_ea+0xebe/0x18e0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:5924 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5967 [inline] __ext4_mark_inode_dirty+0x444/0x6c0 fs/ext4/inode.c:6045 ext4_evict_inode+0xa55/0x1050 fs/ext4/inode.c:284 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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.8.989/9324: #0: ffff88807b49c0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229 #1: ffff88807b49c650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #1: ffff88807b49c650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] #1: ffff88807b49c650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x41f/0x1050 fs/ext4/inode.c:245 #2: ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] #2: ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5964 [inline] #2: ffff8880549a80c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3bd/0x6c0 fs/ext4/inode.c:6045 stack backtrace: CPU: 1 PID: 9324 Comm: syz.8.989 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 percpu_down_read+0x46/0x1b0 include/linux/percpu-rwsem.h:51 ext4_writepages+0x213/0x2d40 fs/ext4/inode.c:2691 do_writepages+0x493/0x700 mm/page-writeback.c:2386 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1657 writeback_single_inode+0x3d2/0x8e0 fs/fs-writeback.c:1770 write_inode_now+0x23b/0x2c0 fs/fs-writeback.c:2817 iput_final fs/inode.c:1756 [inline] iput+0x599/0x880 fs/inode.c:1795 ext4_xattr_set_entry+0x1d76/0x3f70 fs/ext4/xattr.c:1827 ext4_xattr_block_set+0x4d7/0x2ce0 fs/ext4/xattr.c:1926 ext4_xattr_move_to_block fs/ext4/xattr.c:2620 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2695 [inline] ext4_expand_extra_isize_ea+0xebe/0x18e0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:5924 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5967 [inline] __ext4_mark_inode_dirty+0x444/0x6c0 fs/ext4/inode.c:6045 ext4_evict_inode+0xa55/0x1050 fs/ext4/inode.c:284 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f350bd880ca 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:00007f3509fdfe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3509fdfee0 RCX: 00007f350bd880ca RDX: 00002000000001c0 RSI: 0000200000000b80 RDI: 00007f3509fdfea0 RBP: 00002000000001c0 R08: 00007f3509fdfee0 R09: 0000000000800744 R10: 0000000000800744 R11: 0000000000000246 R12: 0000200000000b80 R13: 00007f3509fdfea0 R14: 000000000000047a R15: 000000000000002c EXT4-fs error (device loop8): ext4_xattr_inode_iget:401: inode #11: comm syz.8.989: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:406: comm syz.8.989: error while reading EA inode 11 err=-117 EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:401: inode #11: comm syz.8.989: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:406: comm syz.8.989: error while reading EA inode 11 err=-117 EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:401: inode #18: comm syz.8.989: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:406: comm syz.8.989: error while reading EA inode 18 err=-117 EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:401: inode #18: comm syz.8.989: iget: bad extra_isize 90 (inode size 256) EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs error (device loop8): ext4_xattr_inode_iget:406: comm syz.8.989: error while reading EA inode 18 err=-117 EXT4-fs (loop8): Remounting filesystem read-only EXT4-fs (loop8): 1 orphan inode deleted EXT4-fs (loop8): mounted filesystem without journal. Opts: data_err=ignore,oldalloc,debug_want_extra_isize=0x000000000000005a,nobh,errors=remount-ro,nodiscard,grpid,. Quota mode: none.