EXT4-fs: Ignoring removed oldalloc option ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.0.759/7956 is trying to acquire lock: ffff0000c6df2c18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ffff0000c6df2c18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline] ffff0000c6df2c18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x170/0x2dc fs/ext4/inode.c:3042 but task is already holding lock: ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline] ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6526 [inline] ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x32c/0x828 fs/ext4/inode.c:6607 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->xattr_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1631 ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline] ext4_destroy_inline_data+0x30/0x114 fs/ext4/inline.c:1805 ext4_do_writepages+0x3e4/0x3bc0 fs/ext4/inode.c:2828 ext4_writepages+0x198/0x2dc fs/ext4/inode.c:3043 do_writepages+0x284/0x47c mm/page-writeback.c:2571 filemap_writeback+0x230/0x2bc mm/filemap.c:387 filemap_flush_range mm/filemap.c:436 [inline] filemap_flush+0x30/0x40 mm/filemap.c:451 ext4_convert_inline_data+0x138/0x4e8 fs/ext4/inline.c:1972 ext4_setattr+0xc30/0x18b4 fs/ext4/inode.c:6032 notify_change+0x928/0xb7c fs/attr.c:556 do_truncate+0x1a8/0x22c fs/open.c:68 vfs_truncate+0x3f4/0x458 fs/open.c:118 ksys_truncate+0xe8/0x190 fs/open.c:142 __do_sys_truncate fs/open.c:154 [inline] __se_sys_truncate fs/open.c:152 [inline] __arm64_sys_truncate+0x5c/0x74 fs/open.c:152 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 -> #0 (&sbi->s_writepages_rwsem){++++}-{0:0}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x17c0/0x2ebc kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868 percpu_down_read_internal+0x5c/0x294 include/linux/percpu-rwsem.h:53 percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline] ext4_writepages+0x170/0x2dc fs/ext4/inode.c:3042 do_writepages+0x284/0x47c mm/page-writeback.c:2571 __writeback_single_inode+0x140/0x1880 fs/fs-writeback.c:1787 writeback_single_inode+0x400/0xb20 fs/fs-writeback.c:1906 write_inode_now+0x170/0x208 fs/fs-writeback.c:3060 iput_final fs/inode.c:2009 [inline] iput+0x7cc/0xc2c fs/inode.c:2068 ext4_xattr_block_set+0x1460/0x21e8 fs/ext4/xattr.c:2206 ext4_xattr_move_to_block fs/ext4/xattr.c:2671 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline] ext4_expand_extra_isize_ea+0xaf4/0x1384 fs/ext4/xattr.c:2834 __ext4_expand_extra_isize+0x2a4/0x378 fs/ext4/inode.c:6486 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline] __ext4_mark_inode_dirty+0x394/0x828 fs/ext4/inode.c:6607 ext4_evict_inode+0x798/0xfb8 fs/ext4/inode.c:267 evict+0x4c0/0x74c fs/inode.c:825 iput_final fs/inode.c:2019 [inline] iput+0x8f0/0xc2c fs/inode.c:2068 ext4_process_orphan+0x24c/0x2c0 fs/ext4/orphan.c:358 ext4_orphan_cleanup+0x7d4/0xd20 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5705 [inline] ext4_fill_super+0x4628/0x4e14 fs/ext4/super.c:5828 get_tree_bdev_flags+0x388/0x43c fs/super.c:1634 get_tree_bdev+0x2c/0x3c fs/super.c:1657 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5860 vfs_get_tree+0x90/0x28c fs/super.c:1694 fc_mount+0x24/0xac fs/namespace.c:1198 do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x2a4/0x538 fs/namespace.c:3841 path_mount+0x5f0/0xa88 fs/namespace.c:4161 do_mount+0xe8/0x148 fs/namespace.c:4174 __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount fs/namespace.c:4367 [inline] __arm64_sys_mount+0x334/0x380 fs/namespace.c:4367 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 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); rlock(&sbi->s_writepages_rwsem); *** DEADLOCK *** 3 locks held by syz.0.759/7956: #0: ffff0000d52fa0d8 (&type->s_umount_key#27/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline] #0: ffff0000d52fa0d8 (&type->s_umount_key#27/1){+.+.}-{4:4}, at: sget_fc+0x788/0x13e8 fs/super.c:766 #1: ffff0000d52fa640 (sb_internal){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff0000d52fa640 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff0000d52fa640 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs/super.h:177 [inline] #1: ffff0000d52fa640 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x360/0xfb8 fs/ext4/inode.c:228 #2: ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline] #2: ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6526 [inline] #2: ffff0000daa1b900 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x32c/0x828 fs/ext4/inode.c:6607 stack backtrace: CPU: 1 UID: 0 PID: 7956 Comm: syz.0.759 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x328/0x330 kernel/locking/lockdep.c:2043 check_noncircular+0x158/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x17c0/0x2ebc kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868 percpu_down_read_internal+0x5c/0x294 include/linux/percpu-rwsem.h:53 percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline] ext4_writepages+0x170/0x2dc fs/ext4/inode.c:3042 do_writepages+0x284/0x47c mm/page-writeback.c:2571 __writeback_single_inode+0x140/0x1880 fs/fs-writeback.c:1787 writeback_single_inode+0x400/0xb20 fs/fs-writeback.c:1906 write_inode_now+0x170/0x208 fs/fs-writeback.c:3060 iput_final fs/inode.c:2009 [inline] iput+0x7cc/0xc2c fs/inode.c:2068 ext4_xattr_block_set+0x1460/0x21e8 fs/ext4/xattr.c:2206 ext4_xattr_move_to_block fs/ext4/xattr.c:2671 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline] ext4_expand_extra_isize_ea+0xaf4/0x1384 fs/ext4/xattr.c:2834 __ext4_expand_extra_isize+0x2a4/0x378 fs/ext4/inode.c:6486 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline] __ext4_mark_inode_dirty+0x394/0x828 fs/ext4/inode.c:6607 ext4_evict_inode+0x798/0xfb8 fs/ext4/inode.c:267 evict+0x4c0/0x74c fs/inode.c:825 iput_final fs/inode.c:2019 [inline] iput+0x8f0/0xc2c fs/inode.c:2068 ext4_process_orphan+0x24c/0x2c0 fs/ext4/orphan.c:358 ext4_orphan_cleanup+0x7d4/0xd20 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5705 [inline] ext4_fill_super+0x4628/0x4e14 fs/ext4/super.c:5828 get_tree_bdev_flags+0x388/0x43c fs/super.c:1634 get_tree_bdev+0x2c/0x3c fs/super.c:1657 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5860 vfs_get_tree+0x90/0x28c fs/super.c:1694 fc_mount+0x24/0xac fs/namespace.c:1198 do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x2a4/0x538 fs/namespace.c:3841 path_mount+0x5f0/0xa88 fs/namespace.c:4161 do_mount+0xe8/0x148 fs/namespace.c:4174 __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount fs/namespace.c:4367 [inline] __arm64_sys_mount+0x334/0x380 fs/namespace.c:4367 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 EXT4-fs error (device loop0): ext4_xattr_inode_iget:441: inode #11: comm syz.0.759: iget: bad extra_isize 90 (inode size 256) loop0: lost file I/O error report for ino 11 type 5 pos 0x0 len 0x0 error -117 EXT4-fs (loop0): Remounting filesystem read-only EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2860: Unable to expand inode 15. Delete some EAs or run e2fsck. EXT4-fs warning (device loop0): ext4_evict_inode:270: couldn't mark inode dirty (err -30) EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.