====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.50/6273 is trying to acquire lock: ffff8880398f8770 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_setattr+0x959/0x1b20 fs/ocfs2/file.c:1263 but task is already holding lock: ffff88805d1ecad0 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x94a/0x1b20 fs/ocfs2/file.c:1262 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&oi->ip_alloc_sem){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xb6/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x595/0x11f0 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1aa/0x2a0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:954 [inline] vfs_remove_acl+0x48e/0x700 fs/posix_acl.c:1241 ovl_do_remove_acl fs/overlayfs/overlayfs.h:355 [inline] ovl_workdir_create+0x57d/0x8d0 fs/overlayfs/super.c:369 ovl_make_workdir fs/overlayfs/super.c:682 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x1898/0x59b0 fs/overlayfs/super.c:1567 vfs_get_super fs/super.c:1324 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1343 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&oi->ip_xattr_sem){++++}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_xattr_set_handle+0x3b0/0x7a0 fs/ocfs2/xattr.c:3501 ocfs2_init_security_set+0xbd/0xe0 fs/ocfs2/xattr.c:7307 ocfs2_symlink+0x192e/0x23d0 fs/ocfs2/namei.c:2013 vfs_symlink+0x29a/0x2d0 fs/namei.c:5514 do_symlinkat+0x1f5/0x3d0 fs/namei.c:5541 __do_sys_symlinkat fs/namei.c:5562 [inline] __se_sys_symlinkat fs/namei.c:5559 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:5559 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x1f0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x36b/0x6d0 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x715/0x45b0 fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984 ocfs2_calc_security_init+0x37a/0x5c0 fs/ocfs2/xattr.c:590 ocfs2_symlink+0xe8c/0x23d0 fs/ocfs2/namei.c:1911 vfs_symlink+0x29a/0x2d0 fs/namei.c:5514 do_symlinkat+0x1f5/0x3d0 fs/namei.c:5541 __do_sys_symlinkat fs/namei.c:5562 [inline] __se_sys_symlinkat fs/namei.c:5559 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:5559 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#4){.+.+}-{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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x959/0x1b20 fs/ocfs2/file.c:1263 notify_change+0xc18/0xf60 fs/attr.c:546 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x717/0x8d0 fs/overlayfs/super.c:379 ovl_make_workdir fs/overlayfs/super.c:682 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x1898/0x59b0 fs/overlayfs/super.c:1567 vfs_get_super fs/super.c:1324 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1343 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sb_internal#4 --> &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); rlock(sb_internal#4); *** DEADLOCK *** 4 locks held by syz.4.50/6273: #0: ffff88806115a0d0 (&type->s_umount_key#53/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0 fs/super.c:344 #1: ffff8880398f8480 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499 #2: ffff88805d1ece80 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #2: ffff88805d1ece80 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: ovl_workdir_create+0x6a1/0x8d0 fs/overlayfs/super.c:378 #3: ffff88805d1ecad0 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x94a/0x1b20 fs/ocfs2/file.c:1262 stack backtrace: CPU: 1 UID: 0 PID: 6273 Comm: syz.4.50 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x959/0x1b20 fs/ocfs2/file.c:1263 notify_change+0xc18/0xf60 fs/attr.c:546 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x717/0x8d0 fs/overlayfs/super.c:379 ovl_make_workdir fs/overlayfs/super.c:682 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x1898/0x59b0 fs/overlayfs/super.c:1567 vfs_get_super fs/super.c:1324 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1343 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f93d102f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f93cf296038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f93d1285fa0 RCX: 00007f93d102f749 RDX: 0000200000000b80 RSI: 0000200000000100 RDI: 0000000000000000 RBP: 00007f93d10b3f91 R08: 0000200000000180 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f93d1286038 R14: 00007f93d1285fa0 R15: 00007fff805ce2f8 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.