(syz.4.292,5508,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. fuse: Unknown parameter '00000000000000000000' ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.292/5508 is trying to acquire lock: ffff88805d683120 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xb3/0x340 fs/ocfs2/refcounttree.c:932 but task is already holding lock: ffff88805d6831b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x340 fs/ocfs2/refcounttree.c:931 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&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_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4111 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 (&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_block_group_alloc fs/ocfs2/suballoc.c:681 [inline] ocfs2_reserve_suballoc_bits+0x7ab/0x44d0 fs/ocfs2/suballoc.c:828 ocfs2_reserve_new_inode+0x4f5/0xcd0 fs/ocfs2/suballoc.c:1068 ocfs2_mknod+0x885/0x2510 fs/ocfs2/namei.c:303 ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x11db/0x2fa0 fs/namei.c:3747 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_creat fs/open.c:1347 [inline] __se_sys_creat fs/open.c:1341 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1341 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 (sb_internal#5){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5339 [inline] lock_release+0x321/0x8a0 kernel/locking/lockdep.c:5643 up_write+0x29/0x420 kernel/locking/rwsem.c:1603 inode_unlock include/linux/fs.h:792 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x93/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x4382/0x4400 fs/ocfs2/aops.c:1826 ocfs2_write_begin+0x1b9/0x310 fs/ocfs2/aops.c:1905 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912 ocfs2_file_write_iter+0x1670/0x1e70 fs/ocfs2/file.c:2472 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x745/0xd60 fs/read_write.c:594 ksys_write+0x152/0x260 fs/read_write.c:647 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 (&oi->ip_alloc_sem){++++}-{3:3}: 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 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 other info that might help us debug this: Chain exists of: &oi->ip_alloc_sem --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 5 locks held by syz.4.292/5508: #0: ffff8880775640e0 (&type->s_umount_key#82/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229 #1: ffff888061048460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #2: ffff88805d682648 (&sb->s_type->i_mutex_key#30/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #2: ffff88805d682648 (&sb->s_type->i_mutex_key#30/1){+.+.}-{3:3}, at: ovl_workdir_create+0x140/0x630 fs/overlayfs/super.c:768 #3: ffff88805d683488 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #3: ffff88805d683488 (&sb->s_type->i_mutex_key#30){+.+.}-{3:3}, at: vfs_removexattr+0x69/0x1b0 fs/xattr.c:526 #4: ffff88805d6831b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_try_remove_refcount_tree+0xa1/0x340 fs/ocfs2/refcounttree.c:931 stack backtrace: CPU: 0 PID: 5508 Comm: syz.4.292 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: 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 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 RIP: 0033:0x7fb62d4ebeb9 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:00007fb62b747028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb62d766fa0 RCX: 00007fb62d4ebeb9 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007fb62d559c1f R08: 0000200000000380 R09: 0000000000000000 R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb62d767038 R14: 00007fb62d766fa0 R15: 00007ffc525af648 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.