loop0: detected capacity change from 0 to 512 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.3857/13960 is trying to acquire lock: ffff888022c5cbd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1767 [inline] ffff888022c5cbd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2806 but task is already holding lock: ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6011 [inline] ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3dc/0x6e0 fs/ext4/inode.c:6092 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->xattr_sem){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ext4_setattr+0x86b/0x1ca0 fs/ext4/inode.c:5494 notify_change+0xb0d/0xe10 fs/attr.c:499 chown_common+0x413/0x5d0 fs/open.c:783 do_fchownat+0x14b/0x240 fs/open.c:814 __do_sys_chown fs/open.c:834 [inline] __se_sys_chown fs/open.c:832 [inline] __x64_sys_chown+0x82/0x90 fs/open.c:832 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (jbd2_handle){++++}-{0:0}: wait_transaction_locked+0x1c3/0x270 fs/jbd2/transaction.c:155 add_transaction_credits fs/jbd2/transaction.c:226 [inline] start_this_handle+0x7e8/0x21c0 fs/jbd2/transaction.c:407 jbd2__journal_start+0x2bb/0x5b0 fs/jbd2/transaction.c:505 __ext4_journal_start_sb+0x203/0x560 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_do_writepages+0xfb7/0x3990 fs/ext4/inode.c:2701 ext4_writepages+0x1dd/0x350 fs/ext4/inode.c:2807 do_writepages+0x3b3/0x630 mm/page-writeback.c:2575 __writeback_single_inode+0x153/0xec0 fs/fs-writeback.c:1635 writeback_sb_inodes+0x7cd/0xf50 fs/fs-writeback.c:1926 __writeback_inodes_wb+0x111/0x240 fs/fs-writeback.c:1997 wb_writeback+0x47e/0xbf0 fs/fs-writeback.c:2107 wb_check_old_data_flush fs/fs-writeback.c:2211 [inline] wb_do_writeback fs/fs-writeback.c:2264 [inline] wb_workfn+0xad7/0xe60 fs/fs-writeback.c:2292 process_one_work kernel/workqueue.c:2653 [inline] process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 -> #0 (&sbi->s_writepages_rwsem){++++}-{0:0}: 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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 percpu_down_read+0x44/0x1a0 include/linux/percpu-rwsem.h:51 ext4_writepages_down_read fs/ext4/ext4.h:1767 [inline] ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2806 do_writepages+0x3b3/0x630 mm/page-writeback.c:2575 __writeback_single_inode+0x153/0xec0 fs/fs-writeback.c:1635 writeback_single_inode+0x21f/0x760 fs/fs-writeback.c:1756 write_inode_now+0x183/0x210 fs/fs-writeback.c:2808 iput_final fs/inode.c:1807 [inline] iput+0x5ae/0x920 fs/inode.c:1846 ext4_xattr_block_set+0x273f/0x32b0 fs/ext4/xattr.c:2199 ext4_xattr_move_to_block fs/ext4/xattr.c:2664 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2739 [inline] ext4_expand_extra_isize_ea+0x12c5/0x1e80 fs/ext4/xattr.c:2827 __ext4_expand_extra_isize+0x306/0x400 fs/ext4/inode.c:5971 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6014 [inline] __ext4_mark_inode_dirty+0x45d/0x6e0 fs/ext4/inode.c:6092 ext4_evict_inode+0x7f3/0xea0 fs/ext4/inode.c:252 evict+0x4ca/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbec/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5617 [inline] ext4_fill_super+0x5ed0/0x6790 fs/ext4/super.c:5740 get_tree_bdev+0x3f3/0x520 fs/super.c:1591 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &sbi->s_writepages_rwsem --> jbd2_handle --> &ei->xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->xattr_sem); lock(jbd2_handle); lock(&ei->xattr_sem); rlock(&sbi->s_writepages_rwsem); *** DEADLOCK *** 3 locks held by syz.0.3857/13960: #0: ffff888022c5e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888022c5e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888022c5e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: get_tree_bdev+0x353/0x520 fs/super.c:1589 #1: ffff888022c5e608 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1633 [inline] #1: ffff888022c5e608 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1755 [inline] #1: ffff888022c5e608 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x2bf/0xea0 fs/ext4/inode.c:213 #2: ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline] #2: ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6011 [inline] #2: ffff88807548dac8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3dc/0x6e0 fs/ext4/inode.c:6092 stack backtrace: CPU: 0 PID: 13960 Comm: syz.0.3857 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/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+0x2df1/0x7d40 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 percpu_down_read+0x44/0x1a0 include/linux/percpu-rwsem.h:51 ext4_writepages_down_read fs/ext4/ext4.h:1767 [inline] ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2806 do_writepages+0x3b3/0x630 mm/page-writeback.c:2575 __writeback_single_inode+0x153/0xec0 fs/fs-writeback.c:1635 writeback_single_inode+0x21f/0x760 fs/fs-writeback.c:1756 write_inode_now+0x183/0x210 fs/fs-writeback.c:2808 iput_final fs/inode.c:1807 [inline] iput+0x5ae/0x920 fs/inode.c:1846 ext4_xattr_block_set+0x273f/0x32b0 fs/ext4/xattr.c:2199 ext4_xattr_move_to_block fs/ext4/xattr.c:2664 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2739 [inline] ext4_expand_extra_isize_ea+0x12c5/0x1e80 fs/ext4/xattr.c:2827 __ext4_expand_extra_isize+0x306/0x400 fs/ext4/inode.c:5971 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6014 [inline] __ext4_mark_inode_dirty+0x45d/0x6e0 fs/ext4/inode.c:6092 ext4_evict_inode+0x7f3/0xea0 fs/ext4/inode.c:252 evict+0x4ca/0x8d0 fs/inode.c:705 ext4_orphan_cleanup+0xbec/0x1420 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5617 [inline] ext4_fill_super+0x5ed0/0x6790 fs/ext4/super.c:5740 get_tree_bdev+0x3f3/0x520 fs/super.c:1591 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f801779da0a 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:00007f80185dfe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f80185dfee0 RCX: 00007f801779da0a RDX: 0000200000000280 RSI: 0000200000000080 RDI: 00007f80185dfea0 RBP: 0000200000000280 R08: 00007f80185dfee0 R09: 0000000000800700 R10: 0000000000800700 R11: 0000000000000246 R12: 0000200000000080 R13: 00007f80185dfea0 R14: 000000000000047a R15: 00002000000003c0 EXT4-fs error (device loop0): ext4_xattr_inode_iget:441: inode #11: comm syz.0.3857: iget: bad extra_isize 90 (inode size 256) EXT4-fs error (device loop0): ext4_xattr_inode_iget:446: comm syz.0.3857: error while reading EA inode 11 err=-117 EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2853: Unable to expand inode 15. Delete some EAs or run e2fsck. EXT4-fs error (device loop0): ext4_xattr_inode_iget:441: inode #11: comm syz.0.3857: iget: bad extra_isize 90 (inode size 256) EXT4-fs error (device loop0): ext4_xattr_inode_iget:446: comm syz.0.3857: error while reading EA inode 11 err=-117 EXT4-fs error (device loop0): ext4_xattr_inode_iget:441: inode #18: comm syz.0.3857: iget: bad extra_isize 90 (inode size 256) EXT4-fs error (device loop0): ext4_xattr_inode_iget:446: comm syz.0.3857: error while reading EA inode 18 err=-117 EXT4-fs error (device loop0): ext4_xattr_inode_iget:441: inode #18: comm syz.0.3857: iget: bad extra_isize 90 (inode size 256) EXT4-fs error (device loop0): ext4_xattr_inode_iget:446: comm syz.0.3857: error while reading EA inode 18 err=-117 EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.