syzbot

(syz.0.17,4351,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC.
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.17/4351 is trying to acquire lock:
ffff888076d9c650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0xbc2/0x1ad0 fs/ocfs2/file.c:1266

but task is already holding lock:
ffff88805a45bf60 (&oi->ip_alloc_sem){+.+.}-{3:3}, at: ocfs2_setattr+0xbb3/0x1ad0 fs/ocfs2/file.c:1265

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_alloc_sem){+.+.}-{3:3}:
       down_write+0x38/0x60 kernel/locking/rwsem.c:1551
       ocfs2_try_remove_refcount_tree+0xb3/0x340 fs/ocfs2/refcounttree.c:932
       ocfs2_xattr_set+0x609/0x13e0 fs/ocfs2/xattr.c:3673
       ocfs2_set_acl+0x4e1/0x590 fs/ocfs2/acl.c:254
       ocfs2_iop_set_acl+0x190/0x2b0 fs/ocfs2/acl.c:285
       set_posix_acl fs/posix_acl.c:947 [inline]
       posix_acl_xattr_set+0x36f/0x3e0 fs/posix_acl.c:966
       __vfs_removexattr+0x3b7/0x3f0 fs/xattr.c:470
       __vfs_removexattr_locked+0x1e4/0x230 fs/xattr.c:505
       vfs_removexattr+0x7d/0x1b0 fs/xattr.c:527
       ovl_do_removexattr fs/overlayfs/overlayfs.h:231 [inline]
       ovl_workdir_create+0x33b/0x630 fs/overlayfs/super.c:818
       ovl_make_workdir fs/overlayfs/super.c:1376 [inline]
       ovl_get_workdir+0x37c/0x1230 fs/overlayfs/super.c:1526
       ovl_fill_super+0x1824/0x2a30 fs/overlayfs/super.c:2082
       mount_nodev+0x52/0xe0 fs/super.c:1446
       legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
       vfs_get_tree+0x88/0x270 fs/super.c:1530
       do_new_mount+0x24a/0xa40 fs/namespace.c:3034
       do_mount fs/namespace.c:3377 [inline]
       __do_sys_mount fs/namespace.c:3585 [inline]
       __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #2 (&oi->ip_xattr_sem){++++}-{3:3}:
       down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
       ocfs2_init_acl+0x307/0x770 fs/ocfs2/acl.c:365
       ocfs2_mknod+0x15cb/0x2510 fs/ocfs2/namei.c:410
       ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657
       vfs_mkdir+0x387/0x570 fs/namei.c:4073
       do_mkdirat+0x1df/0x5b0 fs/namei.c:4098
       __do_sys_mkdir fs/namei.c:4118 [inline]
       __se_sys_mkdir fs/namei.c:4116 [inline]
       __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4116
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #1 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
       ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374
       ocfs2_modify_bh+0xe0/0x4c0 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x13c8/0x1750 fs/ocfs2/quota_local.c:764
       dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2485
       dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2522
       ocfs2_enable_quotas+0x1c5/0x490 fs/ocfs2/super.c:927
       ocfs2_fill_super+0x3cd2/0x50f0 fs/ocfs2/super.c:1140
       mount_bdev+0x287/0x3c0 fs/super.c:1400
       legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
       vfs_get_tree+0x88/0x270 fs/super.c:1530
       do_new_mount+0x24a/0xa40 fs/namespace.c:3034
       do_mount fs/namespace.c:3377 [inline]
       __do_sys_mount fs/namespace.c:3585 [inline]
       __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain kernel/locking/lockdep.c:3788 [inline]
       __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012
       lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1811 [inline]
       sb_start_intwrite include/linux/fs.h:1928 [inline]
       ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372
       ocfs2_setattr+0xbc2/0x1ad0 fs/ocfs2/file.c:1266
       notify_change+0xbcd/0xee0 fs/attr.c:505
       ovl_workdir_create+0x446/0x630 fs/overlayfs/super.c:830
       ovl_make_workdir fs/overlayfs/super.c:1376 [inline]
       ovl_get_workdir+0x37c/0x1230 fs/overlayfs/super.c:1526
       ovl_fill_super+0x1824/0x2a30 fs/overlayfs/super.c:2082
       mount_nodev+0x52/0xe0 fs/super.c:1446
       legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
       vfs_get_tree+0x88/0x270 fs/super.c:1530
       do_new_mount+0x24a/0xa40 fs/namespace.c:3034
       do_mount fs/namespace.c:3377 [inline]
       __do_sys_mount fs/namespace.c:3585 [inline]
       __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&oi->ip_xattr_sem);
                               lock(&oi->ip_alloc_sem);
  lock(sb_internal#2);

 *** DEADLOCK ***

5 locks held by syz.0.17/4351:
 #0: ffff888025cb20e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229
 #1: ffff888076d9c460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386
 #2: ffff888068b6d108 (&sb->s_type->i_mutex_key#21/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
 #2: ffff888068b6d108 (&sb->s_type->i_mutex_key#21/1){+.+.}-{3:3}, at: ovl_workdir_create+0x140/0x630 fs/overlayfs/super.c:768
 #3: ffff88805a45c2c8 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #3: ffff88805a45c2c8 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: ovl_workdir_create+0x42b/0x630 fs/overlayfs/super.c:829
 #4: ffff88805a45bf60 (&oi->ip_alloc_sem){+.+.}-{3:3}, at: ocfs2_setattr+0xbb3/0x1ad0 fs/ocfs2/file.c:1265

stack backtrace:
CPU: 0 PID: 4351 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain kernel/locking/lockdep.c:3788 [inline]
 __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012
 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1811 [inline]
 sb_start_intwrite include/linux/fs.h:1928 [inline]
 ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372
 ocfs2_setattr+0xbc2/0x1ad0 fs/ocfs2/file.c:1266
 notify_change+0xbcd/0xee0 fs/attr.c:505
 ovl_workdir_create+0x446/0x630 fs/overlayfs/super.c:830
 ovl_make_workdir fs/overlayfs/super.c:1376 [inline]
 ovl_get_workdir+0x37c/0x1230 fs/overlayfs/super.c:1526
 ovl_fill_super+0x1824/0x2a30 fs/overlayfs/super.c:2082
 mount_nodev+0x52/0xe0 fs/super.c:1446
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7febb5063e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ffec5718a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007febb52dcfa0 RCX: 00007febb5063e59
RDX: 0000200000000000 RSI: 0000200000000280 RDI: 0000000000000000
RBP: 00007febb50f9d6f R08: 00002000000002c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febb52dcfac R14: 00007febb52dcfa0 R15: 00007febb52dcfa0
 </TASK>
overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
overlayfs: upper fs missing required features.