EXT4-fs: Ignoring removed nobh option
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.1291/10211 is trying to acquire lock:
ffff88807c0dcb98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x278/0x600 mm/page-writeback.c:2598
but task is already holding lock:
ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline]
ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6389 [inline]
ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x5ad/0x840 fs/ext4/inode.c:6470
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&ei->xattr_sem){++++}-{4:4}:
down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590
ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
ext4_destroy_inline_data+0x2d/0xe0 fs/ext4/inline.c:1797
ext4_do_writepages+0x118f/0x3df0 fs/ext4/inode.c:2811
ext4_writepages+0x347/0x790 fs/ext4/inode.c:3026
do_writepages+0x278/0x600 mm/page-writeback.c:2598
filemap_writeback+0x22d/0x2e0 mm/filemap.c:387
filemap_fdatawrite_range mm/filemap.c:412 [inline]
file_write_and_wait_range+0xcd/0x140 mm/filemap.c:786
generic_buffers_fsync_noflush+0x77/0x490 fs/buffer.c:609
ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline]
ext4_sync_file+0x5f1/0xe50 fs/ext4/fsync.c:147
vfs_fsync_range+0x142/0x230 fs/sync.c:188
generic_write_sync include/linux/fs.h:2618 [inline]
ext4_buffered_write_iter+0x2e2/0x440 fs/ext4/file.c:305
ext4_file_write_iter+0xa3d/0x1d90 fs/ext4/file.c:723
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:686
ksys_pwrite64 fs/read_write.c:793 [inline]
__do_sys_pwrite64 fs/read_write.c:801 [inline]
__se_sys_pwrite64 fs/read_write.c:798 [inline]
__x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:798
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #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+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
ext4_writepages_down_read fs/ext4/ext4.h:1820 [inline]
ext4_writepages+0x21d/0x790 fs/ext4/inode.c:3025
do_writepages+0x278/0x600 mm/page-writeback.c:2598
__writeback_single_inode+0x164/0x13c0 fs/fs-writeback.c:1737
writeback_single_inode+0x4d3/0xf30 fs/fs-writeback.c:1858
write_inode_now+0x174/0x1f0 fs/fs-writeback.c:2937
iput_final fs/inode.c:1944 [inline]
iput.part.0+0x818/0x1150 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
ext4_xattr_block_set+0x6f7/0x3660 fs/ext4/xattr.c:2204
ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
ext4_expand_extra_isize_ea+0x17c6/0x1d70 fs/ext4/xattr.c:2832
__ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6349
ext4_try_to_expand_extra_isize fs/ext4/inode.c:6392 [inline]
__ext4_mark_inode_dirty+0x63a/0x840 fs/ext4/inode.c:6470
ext4_evict_inode+0x813/0x1760 fs/ext4/inode.c:253
evict+0x3c2/0xad0 fs/inode.c:837
iput_final fs/inode.c:1954 [inline]
iput.part.0+0x624/0x1150 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
__ext4_fill_super fs/ext4/super.c:5658 [inline]
ext4_fill_super+0x90b8/0xb3f0 fs/ext4/super.c:5777
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
vfs_get_tree+0x92/0x320 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7d0/0x23c0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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.0.1291/10211:
#0: ffff88807c0da0e0 (&type->s_umount_key#27/1){+.+.}-{4:4}, at: alloc_super+0x244/0xd20 fs/super.c:344
#1: ffff88807c0da610 (sb_internal){++++}-{0:0}, at: evict+0x3c2/0xad0 fs/inode.c:837
#2: ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline]
#2: ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6389 [inline]
#2: ffff88806f2da748 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x5ad/0x840 fs/ext4/inode.c:6470
stack backtrace:
CPU: 1 UID: 0 PID: 10211 Comm: syz.0.1291 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 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+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
ext4_writepages_down_read fs/ext4/ext4.h:1820 [inline]
ext4_writepages+0x21d/0x790 fs/ext4/inode.c:3025
do_writepages+0x278/0x600 mm/page-writeback.c:2598
__writeback_single_inode+0x164/0x13c0 fs/fs-writeback.c:1737
writeback_single_inode+0x4d3/0xf30 fs/fs-writeback.c:1858
write_inode_now+0x174/0x1f0 fs/fs-writeback.c:2937
iput_final fs/inode.c:1944 [inline]
iput.part.0+0x818/0x1150 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
ext4_xattr_block_set+0x6f7/0x3660 fs/ext4/xattr.c:2204
ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
ext4_expand_extra_isize_ea+0x17c6/0x1d70 fs/ext4/xattr.c:2832
__ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6349
ext4_try_to_expand_extra_isize fs/ext4/inode.c:6392 [inline]
__ext4_mark_inode_dirty+0x63a/0x840 fs/ext4/inode.c:6470
ext4_evict_inode+0x813/0x1760 fs/ext4/inode.c:253
evict+0x3c2/0xad0 fs/inode.c:837
iput_final fs/inode.c:1954 [inline]
iput.part.0+0x624/0x1150 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
__ext4_fill_super fs/ext4/super.c:5658 [inline]
ext4_fill_super+0x90b8/0xb3f0 fs/ext4/super.c:5777
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
vfs_get_tree+0x92/0x320 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7d0/0x23c0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f334eb9c14a
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:00007f334fa7ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f334fa7aee0 RCX: 00007f334eb9c14a
RDX: 0000200000000180 RSI: 0000200000000140 RDI: 00007f334fa7aea0
RBP: 0000200000000180 R08: 00007f334fa7aee0 R09: 0000000000800718
R10: 0000000000800718 R11: 0000000000000246 R12: 0000200000000140
R13: 00007f334fa7aea0 R14: 00000000000004a3 R15: 0000200000000280
------------[ cut here ]------------
EA inode 11 i_nlink=1026
WARNING: fs/ext4/xattr.c:1057 at ext4_xattr_inode_update_ref+0x477/0x590 fs/ext4/xattr.c:1057, CPU#1: syz.0.1291/10211
Modules linked in:
CPU: 1 UID: 0 PID: 10211 Comm: syz.0.1291 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ext4_xattr_inode_update_ref+0x47e/0x590 fs/ext4/xattr.c:1057
Code: 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0a 01 00 00 48 8d 3d f9 b2 e1 0d 48 8b 73 40 44 89 e2 <67> 48 0f b9 3a eb a6 e8 16 a4 2a ff 48 8d 7b 40 48 b8 00 00 00 00
RSP: 0018:ffffc900046df190 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88806f2dbc58 RCX: ffffc9000c0ea000
RDX: 0000000000000402 RSI: 000000000000000b RDI: ffffffff90bde950
RBP: ffffc900046df258 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000402 R11: 0000000000000001 R12: 0000000000000402
R13: 1ffff920008dbe35 R14: 00000000ffffffff R15: 0000000000000000
FS: 00007f334fa7b6c0(0000) GS:ffff8881246dc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555625fda28 CR3: 000000007bab6000 CR4: 0000000000350ef0
Call Trace:
ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1082 [inline]
ext4_xattr_set_entry+0x185b/0x20b0 fs/ext4/xattr.c:1724
ext4_xattr_ibody_set+0x3d3/0x5d0 fs/ext4/xattr.c:2273
ext4_xattr_move_to_block fs/ext4/xattr.c:2676 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
ext4_expand_extra_isize_ea+0x180d/0x1d70 fs/ext4/xattr.c:2832
__ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6349
ext4_try_to_expand_extra_isize fs/ext4/inode.c:6392 [inline]
__ext4_mark_inode_dirty+0x63a/0x840 fs/ext4/inode.c:6470
ext4_evict_inode+0x813/0x1760 fs/ext4/inode.c:253
evict+0x3c2/0xad0 fs/inode.c:837
iput_final fs/inode.c:1954 [inline]
iput.part.0+0x624/0x1150 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
__ext4_fill_super fs/ext4/super.c:5658 [inline]
ext4_fill_super+0x90b8/0xb3f0 fs/ext4/super.c:5777
get_tree_bdev_flags+0x38c/0x620 fs/super.c:1691
vfs_get_tree+0x92/0x320 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x7d0/0x23c0 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f334eb9c14a
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:00007f334fa7ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f334fa7aee0 RCX: 00007f334eb9c14a
RDX: 0000200000000180 RSI: 0000200000000140 RDI: 00007f334fa7aea0
RBP: 0000200000000180 R08: 00007f334fa7aee0 R09: 0000000000800718
R10: 0000000000800718 R11: 0000000000000246 R12: 0000200000000140
R13: 00007f334fa7aea0 R14: 00000000000004a3 R15: 0000200000000280
----------------
Code disassembly (best guess):
0: 40 rex
1: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
8: fc ff df
b: 48 89 fa mov %rdi,%rdx
e: 48 c1 ea 03 shr $0x3,%rdx
12: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
16: 0f 85 0a 01 00 00 jne 0x126
1c: 48 8d 3d f9 b2 e1 0d lea 0xde1b2f9(%rip),%rdi # 0xde1b31c
23: 48 8b 73 40 mov 0x40(%rbx),%rsi
27: 44 89 e2 mov %r12d,%edx
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: eb a6 jmp 0xffffffd7
31: e8 16 a4 2a ff call 0xff2aa44c
36: 48 8d 7b 40 lea 0x40(%rbx),%rdi
3a: 48 rex.W
3b: b8 00 00 00 00 mov $0x0,%eax