====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00158-g3013c33dcbd9 #0 Not tainted ------------------------------------------------------ syz.2.1582/14125 is trying to acquire lock: ffff888042ad0610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x11c3/0x2560 fs/ocfs2/file.c:1263 but task is already holding lock: ffff8880490fcda0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x11b2/0x2560 fs/ocfs2/file.c:1262 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x92/0x200 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x1043/0x2a80 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x46d/0x550 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:286 set_posix_acl+0x25f/0x320 fs/posix_acl.c:954 vfs_remove_acl+0x33f/0x650 fs/posix_acl.c:1241 ovl_do_remove_acl fs/overlayfs/overlayfs.h:353 [inline] ovl_workdir_create+0x60b/0xa40 fs/overlayfs/super.c:353 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir fs/overlayfs/super.c:827 [inline] ovl_fill_super+0xeaf/0x6780 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1299 vfs_get_tree+0x8e/0x340 fs/super.c:1759 do_new_mount fs/namespace.c:3884 [inline] path_mount+0x14d4/0x1f20 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2fc/0x7d0 fs/ocfs2/acl.c:366 ocfs2_mknod+0xd5c/0x2540 fs/ocfs2/namei.c:410 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3701 open_last_lookups fs/namei.c:3800 [inline] path_openat+0x905/0x2d40 fs/namei.c:4036 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0x5ea/0x1410 fs/jbd2/transaction.c:444 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x3b9/0x970 fs/ocfs2/journal.c:352 ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3701 open_last_lookups fs/namei.c:3800 [inline] path_openat+0x905/0x2d40 fs/namei.c:4036 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:350 ocfs2_mknod+0xc19/0x2540 fs/ocfs2/namei.c:361 ocfs2_create+0x17c/0x460 fs/ocfs2/namei.c:673 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3701 open_last_lookups fs/namei.c:3800 [inline] path_openat+0x905/0x2d40 fs/namei.c:4036 do_filp_open+0x20b/0x470 fs/namei.c:4066 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x153/0x1e0 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 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:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:348 ocfs2_setattr+0x11c3/0x2560 fs/ocfs2/file.c:1263 notify_change+0x6a9/0x1230 fs/attr.c:552 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x7aa/0xa40 fs/overlayfs/super.c:363 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir fs/overlayfs/super.c:827 [inline] ovl_fill_super+0xeaf/0x6780 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1299 vfs_get_tree+0x8e/0x340 fs/super.c:1759 do_new_mount fs/namespace.c:3884 [inline] path_mount+0x14d4/0x1f20 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 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 *** 5 locks held by syz.2.1582/14125: #0: ffff88802a3160e0 (&type->s_umount_key#74/1){+.+.}-{4:4}, at: alloc_super+0x235/0xbd0 fs/super.c:344 #1: ffff888042ad0420 (sb_writers#21){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:665 [inline] #1: ffff888042ad0420 (sb_writers#21){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:827 [inline] #1: ffff888042ad0420 (sb_writers#21){.+.+}-{0:0}, at: ovl_fill_super+0xe80/0x6780 fs/overlayfs/super.c:1406 #2: ffff8880490fdf40 (&sb->s_type->i_mutex_key#27/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #2: ffff8880490fdf40 (&sb->s_type->i_mutex_key#27/1){+.+.}-{4:4}, at: ovl_workdir_create+0x121/0xa40 fs/overlayfs/super.c:302 #3: ffff8880490fd100 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #3: ffff8880490fd100 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: ovl_workdir_create+0x73a/0xa40 fs/overlayfs/super.c:362 #4: ffff8880490fcda0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x11b2/0x2560 fs/ocfs2/file.c:1262 stack backtrace: CPU: 1 UID: 0 PID: 14125 Comm: syz.2.1582 Not tainted 6.15.0-rc5-syzkaller-00158-g3013c33dcbd9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2079 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:348 ocfs2_setattr+0x11c3/0x2560 fs/ocfs2/file.c:1263 notify_change+0x6a9/0x1230 fs/attr.c:552 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x7aa/0xa40 fs/overlayfs/super.c:363 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir fs/overlayfs/super.c:827 [inline] ovl_fill_super+0xeaf/0x6780 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1299 vfs_get_tree+0x8e/0x340 fs/super.c:1759 do_new_mount fs/namespace.c:3884 [inline] path_mount+0x14d4/0x1f20 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __x64_sys_mount+0x28d/0x310 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f209a78e969 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:00007f20985f6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f209a9b5fa0 RCX: 00007f209a78e969 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007f209a810ab1 R08: 0000200000000a00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f209a9b5fa0 R15: 00007ffc50332b88 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.