EXT4-fs: Ignoring removed nobh option
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.4257/24275 is trying to acquire lock:
ffff88801cb4ebd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1767 [inline]
ffff88801cb4ebd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2806

but task is already holding lock:
ffff888078fceec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline]
ffff888078fceec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6011 [inline]
ffff888078fceec8 (&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:

-> #1 (&ei->xattr_sem){++++}-{3:3}:
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       ext4_xattr_get+0x10b/0x6a0 fs/ext4/xattr.c:708
       ext4_get_acl+0x84/0x670 fs/ext4/acl.c:165
       __get_acl+0x273/0x400 fs/posix_acl.c:160
       get_inode_acl fs/posix_acl.c:185 [inline]
       posix_acl_create+0x131/0x440 fs/posix_acl.c:648
       ext4_init_acl+0xbb/0x330 fs/ext4/acl.c:284
       __ext4_new_inode+0x2f27/0x3ac0 fs/ext4/ialloc.c:1326
       ext4_ext_migrate+0x6f0/0x1080 fs/ext4/migrate.c:455
       __ext4_ioctl fs/ext4/ioctl.c:1409 [inline]
       ext4_ioctl+0x1ee3/0x3b30 fs/ext4/ioctl.c:1627
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:871 [inline]
       __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
       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

-> #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+0x5ed3/0x6790 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:

 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.5.4257/24275:
 #0: ffff88805cb600e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff88805cb600e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff88805cb600e0 (&type->s_umount_key#31){++++}-{3:3}, at: get_tree_bdev+0x353/0x520 fs/super.c:1589
 #1: ffff88805cb60608 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1633 [inline]
 #1: ffff88805cb60608 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1755 [inline]
 #1: ffff88805cb60608 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x2bf/0xea0 fs/ext4/inode.c:213
 #2: ffff888078fceec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:165 [inline]
 #2: ffff888078fceec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6011 [inline]
 #2: ffff888078fceec8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3dc/0x6e0 fs/ext4/inode.c:6092

stack backtrace:
CPU: 1 PID: 24275 Comm: syz.5.4257 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 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+0x5ed3/0x6790 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: 0033:0x7feff6f9da0a
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:00007feff7dfae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007feff7dfaee0 RCX: 00007feff6f9da0a
RDX: 0000200000000180 RSI: 0000200000000140 RDI: 00007feff7dfaea0
RBP: 0000200000000180 R08: 00007feff7dfaee0 R09: 0000000000800718
R10: 0000000000800718 R11: 0000000000000246 R12: 0000200000000140
R13: 00007feff7dfaea0 R14: 00000000000004a3 R15: 00002000000003c0
 </TASK>
------------[ cut here ]------------
EA inode 11 i_nlink=1026
WARNING: CPU: 1 PID: 24275 at fs/ext4/xattr.c:1059 ext4_xattr_inode_update_ref+0x53c/0x590 fs/ext4/xattr.c:1057
Modules linked in:
CPU: 1 PID: 24275 Comm: syz.5.4257 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_xattr_inode_update_ref+0x53c/0x590 fs/ext4/xattr.c:1057
Code: 8d 7e 50 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 a5 ec 98 ff 49 8b 37 48 c7 c7 e0 d4 de 8a 89 da e8 94 7e 0a ff <0f> 0b 4c 8b 74 24 08 4c 8b 7c 24 10 e9 ab fe ff ff e8 5e 13 3e 08
RSP: 0018:ffffc900034371a0 EFLAGS: 00010246
RAX: f84ee33842f63200 RBX: 0000000000000402 RCX: 0000000000080000
RDX: ffffc90010561000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90003437298 R08: ffff8880b8f28c13 R09: 1ffff110171e5182
R10: dffffc0000000000 R11: ffffed10171e5183 R12: dffffc0000000000
R13: ffff88802cd236a8 R14: ffff88802cd234b0 R15: ffff88802cd23500
FS:  00007feff7dfb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055575de95950 CR3: 000000004a148000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1082 [inline]
 ext4_xattr_set_entry+0xcda/0x1e90 fs/ext4/xattr.c:1724
 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2268
 ext4_xattr_move_to_block fs/ext4/xattr.c:2671 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2739 [inline]
 ext4_expand_extra_isize_ea+0x1398/0x1e80 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+0x5ed3/0x6790 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: 0033:0x7feff6f9da0a
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:00007feff7dfae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007feff7dfaee0 RCX: 00007feff6f9da0a
RDX: 0000200000000180 RSI: 0000200000000140 RDI: 00007feff7dfaea0
RBP: 0000200000000180 R08: 00007feff7dfaee0 R09: 0000000000800718
R10: 0000000000800718 R11: 0000000000000246 R12: 0000200000000140
R13: 00007feff7dfaea0 R14: 00000000000004a3 R15: 00002000000003c0
 </TASK>