====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.1.4067/23409 is trying to acquire lock: ffff888037e487f0 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275 but task is already holding lock: ffff88805fe11890 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10 fs/ocfs2/file.c:1274 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x639/0x13a0 fs/ocfs2/xattr.c:3713 ocfs2_set_acl+0x6fd/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1b1/0x2b0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:955 [inline] vfs_remove_acl+0x56e/0x870 fs/posix_acl.c:1242 ovl_do_remove_acl fs/overlayfs/overlayfs.h:361 [inline] ovl_workdir_create+0x53a/0x8b0 fs/overlayfs/super.c:369 ovl_make_workdir fs/overlayfs/super.c:678 [inline] ovl_get_workdir fs/overlayfs/super.c:836 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x19ad/0x5d40 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1286 vfs_get_tree+0x92/0x2a0 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3841 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x1c3/0x800 fs/ocfs2/acl.c:367 ocfs2_mknod+0x166a/0x2240 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660 vfs_mkdir+0x402/0x620 fs/namei.c:5272 filename_mkdirat+0x289/0x520 fs/namei.c:5305 __do_sys_mkdirat fs/namei.c:5326 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x3ac/0x700 fs/ocfs2/journal.c:369 ocfs2_symlink+0x106c/0x25f0 fs/ocfs2/namei.c:1928 vfs_symlink+0x18b/0x330 fs/namei.c:5656 filename_symlinkat+0x1cd/0x420 fs/namei.c:5681 __do_sys_symlink fs/namei.c:5708 [inline] __se_sys_symlink+0x4d/0x2b0 fs/namei.c:5704 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#2){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3167 [inline] check_prevs_add kernel/locking/lockdep.c:3286 [inline] validate_chain kernel/locking/lockdep.c:3910 [inline] __lock_acquire+0x1520/0x2ce0 kernel/locking/lockdep.c:5239 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870 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+0x2ac/0x700 fs/ocfs2/journal.c:367 ocfs2_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275 notify_change+0xbb8/0xec0 fs/attr.c:556 ovl_do_notify_change fs/overlayfs/overlayfs.h:209 [inline] ovl_workdir_create+0x69c/0x8b0 fs/overlayfs/super.c:379 ovl_make_workdir fs/overlayfs/super.c:678 [inline] ovl_get_workdir fs/overlayfs/super.c:836 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x19ad/0x5d40 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1286 vfs_get_tree+0x92/0x2a0 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3841 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 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#2 --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); rlock(sb_internal#2); *** DEADLOCK *** 4 locks held by syz.1.4067/23409: #0: ffff88803539a0d0 (&type->s_umount_key#53/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline] #0: ffff88803539a0d0 (&type->s_umount_key#53/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1910 fs/super.c:766 #1: ffff888037e48500 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #2: ffff88805fe11c40 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff88805fe11c40 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: ovl_workdir_create+0x63d/0x8b0 fs/overlayfs/super.c:378 #3: ffff88805fe11890 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10 fs/ocfs2/file.c:1274 stack backtrace: CPU: 1 UID: 0 PID: 23409 Comm: syz.1.4067 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2045 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3167 [inline] check_prevs_add kernel/locking/lockdep.c:3286 [inline] validate_chain kernel/locking/lockdep.c:3910 [inline] __lock_acquire+0x1520/0x2ce0 kernel/locking/lockdep.c:5239 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870 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+0x2ac/0x700 fs/ocfs2/journal.c:367 ocfs2_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275 notify_change+0xbb8/0xec0 fs/attr.c:556 ovl_do_notify_change fs/overlayfs/overlayfs.h:209 [inline] ovl_workdir_create+0x69c/0x8b0 fs/overlayfs/super.c:379 ovl_make_workdir fs/overlayfs/super.c:678 [inline] ovl_get_workdir fs/overlayfs/super.c:836 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x19ad/0x5d40 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1286 vfs_get_tree+0x92/0x2a0 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3841 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f852bc5ce59 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:00007f8529e8d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f852bed6090 RCX: 00007f852bc5ce59 RDX: 0000200000000000 RSI: 0000200000000100 RDI: 0000000000000000 RBP: 00007f852bcf2e6f R08: 0000200000000040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f852bed6128 R14: 00007f852bed6090 R15: 00007fffefcadd48 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.