overlayfs: workdir and upperdir must be separate subtrees overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0 Not tainted ------------------------------------------------------ syz.0.21/6035 is trying to acquire lock: ffff8880781ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] ffff8880781ea640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x192/0x4e70 fs/ocfs2/suballoc.c:786 but task is already holding lock: ffff888069c0ce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930 fs/ocfs2/xattr.c:3583 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&oi->ip_xattr_sem){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ocfs2_xattr_set_handle+0x539/0xa10 fs/ocfs2/xattr.c:3501 ocfs2_init_security_set+0xbd/0xd0 fs/ocfs2/xattr.c:7307 ocfs2_mknod+0x1ccf/0x2b30 fs/ocfs2/namei.c:419 ocfs2_create+0x1ab/0x470 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3984 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (jbd2_handle){++++}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 start_this_handle+0x1eb4/0x2110 fs/jbd2/transaction.c:448 jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505 jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:544 ocfs2_start_trans+0x3c9/0x700 fs/ocfs2/journal.c:352 ocfs2_setattr+0x1269/0x1ef0 fs/ocfs2/file.c:1251 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe2/0x150 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:861 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x3be/0x700 fs/ocfs2/journal.c:350 ocfs2_setattr+0x1269/0x1ef0 fs/ocfs2/file.c:1251 notify_change+0xbca/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 vfs_fchown fs/open.c:846 [inline] ksys_fchown+0xe2/0x150 fs/open.c:858 __do_sys_fchown fs/open.c:863 [inline] __se_sys_fchown fs/open.c:861 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:861 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#2){.+.+}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1725 [inline] sb_start_intwrite include/linux/fs.h:1908 [inline] ocfs2_start_trans+0x2b9/0x700 fs/ocfs2/journal.c:348 ocfs2_shutdown_local_alloc+0x218/0xa90 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x202/0x910 fs/ocfs2/super.c:1877 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] ocfs2_reserve_suballoc_bits+0x192/0x4e70 fs/ocfs2/suballoc.c:786 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1132 [inline] ocfs2_reserve_clusters_with_limit+0x3dd/0xb60 fs/ocfs2/suballoc.c:1177 ocfs2_init_xattr_set_ctxt+0x420/0x8e0 fs/ocfs2/xattr.c:3286 ocfs2_xattr_set+0xf4e/0x1930 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:314 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:326 [inline] ovl_make_workdir fs/overlayfs/super.c:696 [inline] ovl_get_workdir+0xd90/0x1920 fs/overlayfs/super.c:808 ovl_fill_super+0x12a8/0x3560 fs/overlayfs/super.c:1376 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3 --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3); *** DEADLOCK *** 4 locks held by syz.0.21/6035: #0: ffff88802a5860e0 (&type->s_umount_key#71/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344 #1: ffff888029756420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #2: ffff888069c0d100 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #2: ffff888069c0d100 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320 #3: ffff888069c0ce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x633/0x1930 fs/ocfs2/xattr.c:3583 stack backtrace: CPU: 0 UID: 0 PID: 6035 Comm: syz.0.21 Not tainted 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] ocfs2_reserve_suballoc_bits+0x192/0x4e70 fs/ocfs2/suballoc.c:786 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1132 [inline] ocfs2_reserve_clusters_with_limit+0x3dd/0xb60 fs/ocfs2/suballoc.c:1177 ocfs2_init_xattr_set_ctxt+0x420/0x8e0 fs/ocfs2/xattr.c:3286 ocfs2_xattr_set+0xf4e/0x1930 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:314 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:326 [inline] ovl_make_workdir fs/overlayfs/super.c:696 [inline] ovl_get_workdir+0xd90/0x1920 fs/overlayfs/super.c:808 ovl_fill_super+0x12a8/0x3560 fs/overlayfs/super.c:1376 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb42b985d29 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:00007fb42c735038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb42bb75fa0 RCX: 00007fb42b985d29 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007fb42ba01aa8 R08: 0000000020000100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb42bb75fa0 R15: 00007ffedaff08f8 overlayfs: upper fs missing required features.