======================================================
WARNING: possible circular locking dependency detected
6.6.0-syzkaller-05843-g89ed67ef126c #0 Not tainted
------------------------------------------------------
syz-executor.0/17583 is trying to acquire lock:
ffffffff8d11be80 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:303 [inline]
ffffffff8d11be80 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slab.h:709 [inline]
ffffffff8d11be80 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3460 [inline]
ffffffff8d11be80 (fs_reclaim){+.+.}-{0:0}, at: __kmem_cache_alloc_node+0x51/0x330 mm/slub.c:3517
but task is already holding lock:
ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline]
ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5844 [inline]
ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x800 fs/ext4/inode.c:5925
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ei->xattr_sem){++++}-{3:3}:
down_write+0x93/0x200 kernel/locking/rwsem.c:1579
ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
ext4_xattr_set_handle+0x159/0x1420 fs/ext4/xattr.c:2371
ext4_xattr_set+0x149/0x370 fs/ext4/xattr.c:2558
__vfs_setxattr+0x173/0x1d0 fs/xattr.c:201
__vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235
__vfs_setxattr_locked+0x17e/0x250 fs/xattr.c:296
vfs_setxattr+0x146/0x350 fs/xattr.c:322
do_setxattr+0x142/0x170 fs/xattr.c:630
setxattr+0x159/0x170 fs/xattr.c:653
path_setxattr+0x175/0x1d0 fs/xattr.c:672
__do_sys_lsetxattr fs/xattr.c:695 [inline]
__se_sys_lsetxattr fs/xattr.c:691 [inline]
__ia32_sys_lsetxattr+0xbd/0x150 fs/xattr.c:691
do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:230
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
-> #1 (jbd2_handle){++++}-{0:0}:
start_this_handle+0x10fc/0x15e0 fs/jbd2/transaction.c:463
jbd2__journal_start+0x391/0x690 fs/jbd2/transaction.c:520
__ext4_journal_start_sb+0x40f/0x5c0 fs/ext4/ext4_jbd2.c:112
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:5954
__mark_inode_dirty+0x1e0/0xd50 fs/fs-writeback.c:2452
mark_inode_dirty_sync include/linux/fs.h:2311 [inline]
iput.part.0+0x5b/0x7a0 fs/inode.c:1798
iput+0x5c/0x80 fs/inode.c:1791
dentry_unlink_inode+0x292/0x430 fs/dcache.c:401
__dentry_kill+0x3b8/0x640 fs/dcache.c:607
shrink_dentry_list+0x22b/0x7d0 fs/dcache.c:1201
prune_dcache_sb+0xeb/0x150 fs/dcache.c:1282
super_cache_scan+0x31f/0x540 fs/super.c:228
do_shrink_slab+0x422/0xaa0 mm/vmscan.c:900
shrink_slab_memcg mm/vmscan.c:969 [inline]
shrink_slab+0x48b/0x6e0 mm/vmscan.c:1048
shrink_one+0x4f7/0x700 mm/vmscan.c:5417
shrink_many mm/vmscan.c:5469 [inline]
lru_gen_shrink_node mm/vmscan.c:5586 [inline]
shrink_node+0x20cd/0x3790 mm/vmscan.c:6526
kswapd_shrink_node mm/vmscan.c:7331 [inline]
balance_pgdat+0xa32/0x1b80 mm/vmscan.c:7521
kswapd+0x5be/0xbf0 mm/vmscan.c:7781
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
-> #0 (fs_reclaim){+.+.}-{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:3868 [inline]
__lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136
lock_acquire kernel/locking/lockdep.c:5753 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718
__fs_reclaim_acquire mm/page_alloc.c:3551 [inline]
fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3565
might_alloc include/linux/sched/mm.h:303 [inline]
slab_pre_alloc_hook mm/slab.h:709 [inline]
slab_alloc_node mm/slub.c:3460 [inline]
__kmem_cache_alloc_node+0x51/0x330 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1014
kmalloc_node include/linux/slab.h:620 [inline]
kvmalloc_node+0x99/0x1a0 mm/util.c:607
kvmalloc include/linux/slab.h:738 [inline]
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline]
ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1577 [inline]
ext4_xattr_set_entry+0x1c3d/0x3ce0 fs/ext4/xattr.c:1719
ext4_xattr_block_set+0xcbf/0x30e0 fs/ext4/xattr.c:2039
ext4_xattr_move_to_block fs/ext4/xattr.c:2667 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2742 [inline]
ext4_expand_extra_isize_ea+0x1306/0x1b20 fs/ext4/xattr.c:2834
__ext4_expand_extra_isize+0x342/0x470 fs/ext4/inode.c:5804
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5847 [inline]
__ext4_mark_inode_dirty+0x52b/0x800 fs/ext4/inode.c:5925
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:5957
__mark_inode_dirty+0x1e0/0xd50 fs/fs-writeback.c:2452
mark_inode_dirty include/linux/fs.h:2306 [inline]
ext4_setattr+0x37c/0x29d0 fs/ext4/inode.c:5481
notify_change+0x742/0x11c0 fs/attr.c:499
vfs_utimes+0x41d/0x840 fs/utimes.c:66
do_utimes_path+0x114/0x1c0 fs/utimes.c:99
do_utimes+0x34/0x100 fs/utimes.c:145
__do_sys_utimensat_time32 fs/utimes.c:264 [inline]
__se_sys_utimensat_time32 fs/utimes.c:252 [inline]
__ia32_sys_utimensat_time32+0x1c7/0x2b0 fs/utimes.c:252
do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:230
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
other info that might help us debug this:
Chain exists of:
fs_reclaim --> jbd2_handle --> &ei->xattr_sem
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->xattr_sem);
lock(jbd2_handle);
lock(&ei->xattr_sem);
lock(fs_reclaim);
*** DEADLOCK ***
3 locks held by syz-executor.0/17583:
#0: ffff888027922418 (sb_writers#4){.+.+}-{0:0}, at: vfs_utimes+0x6aa/0x840 fs/utimes.c:36
#1: ffff8880244a7200 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff8880244a7200 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_utimes+0x3d2/0x840 fs/utimes.c:65
#2: ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline]
#2: ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5844 [inline]
#2: ffff8880244a6ec8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4a1/0x800 fs/ext4/inode.c:5925
stack backtrace:
CPU: 0 PID: 17583 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x311/0x3f0 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:3868 [inline]
__lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136
lock_acquire kernel/locking/lockdep.c:5753 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718
__fs_reclaim_acquire mm/page_alloc.c:3551 [inline]
fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3565
might_alloc include/linux/sched/mm.h:303 [inline]
slab_pre_alloc_hook mm/slab.h:709 [inline]
slab_alloc_node mm/slub.c:3460 [inline]
__kmem_cache_alloc_node+0x51/0x330 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1014
kmalloc_node include/linux/slab.h:620 [inline]
kvmalloc_node+0x99/0x1a0 mm/util.c:607
kvmalloc include/linux/slab.h:738 [inline]
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline]
ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1577 [inline]
ext4_xattr_set_entry+0x1c3d/0x3ce0 fs/ext4/xattr.c:1719
ext4_xattr_block_set+0xcbf/0x30e0 fs/ext4/xattr.c:2039
ext4_xattr_move_to_block fs/ext4/xattr.c:2667 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2742 [inline]
ext4_expand_extra_isize_ea+0x1306/0x1b20 fs/ext4/xattr.c:2834
__ext4_expand_extra_isize+0x342/0x470 fs/ext4/inode.c:5804
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5847 [inline]
__ext4_mark_inode_dirty+0x52b/0x800 fs/ext4/inode.c:5925
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:5957
__mark_inode_dirty+0x1e0/0xd50 fs/fs-writeback.c:2452
mark_inode_dirty include/linux/fs.h:2306 [inline]
ext4_setattr+0x37c/0x29d0 fs/ext4/inode.c:5481
notify_change+0x742/0x11c0 fs/attr.c:499
vfs_utimes+0x41d/0x840 fs/utimes.c:66
do_utimes_path+0x114/0x1c0 fs/utimes.c:99
do_utimes+0x34/0x100 fs/utimes.c:145
__do_sys_utimensat_time32 fs/utimes.c:264 [inline]
__se_sys_utimensat_time32 fs/utimes.c:252 [inline]
__ia32_sys_utimensat_time32+0x1c7/0x2b0 fs/utimes.c:252
do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:230
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
RIP: 0023:0xf7f9c579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f975ac EFLAGS: 00000292 ORIG_RAX: 0000000000000140
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi