EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted ------------------------------------------------------ syz-executor.0/10669 is trying to acquire lock: ffff0000dff39810 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] ffff0000dff39810 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xc4/0x120 fs/inode.c:1124 but task is already holding lock: ffff0000dff38e08 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff0000dff38e08 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: lock_two_nondirectories+0xd4/0x120 fs/inode.c:1122 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1525 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1608 [inline] ext4_xattr_set_entry+0x2394/0x2c3c fs/ext4/xattr.c:1737 ext4_xattr_block_set+0x8e0/0x2cc4 fs/ext4/xattr.c:2043 ext4_xattr_set_handle+0xb2c/0x12d8 fs/ext4/xattr.c:2458 ext4_xattr_set+0x1e0/0x354 fs/ext4/xattr.c:2560 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:203 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:237 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:298 vfs_setxattr+0x1a8/0x344 fs/xattr.c:324 do_setxattr fs/xattr.c:609 [inline] setxattr+0x208/0x29c fs/xattr.c:632 path_setxattr+0x17c/0x258 fs/xattr.c:651 __do_sys_setxattr fs/xattr.c:667 [inline] __se_sys_setxattr fs/xattr.c:663 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:663 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #2 (&ei->xattr_sem){++++}-{3:3}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_xattr_set_handle+0x1e0/0x12d8 fs/ext4/xattr.c:2373 ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44 security_inode_init_security+0x270/0x370 security/security.c:1147 ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x2a7c/0x384c fs/ext4/ialloc.c:1324 ext4_create+0x234/0x480 fs/ext4/namei.c:2808 lookup_open fs/namei.c:3416 [inline] open_last_lookups fs/namei.c:3484 [inline] path_openat+0xf80/0x27f8 fs/namei.c:3712 do_filp_open+0x1bc/0x3cc fs/namei.c:3742 do_sys_openat2+0x128/0x3d8 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1375 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #1 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1128/0x1394 fs/jbd2/transaction.c:463 jbd2__journal_start+0x29c/0x7b4 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x370/0x900 fs/ext4/ext4_jbd2.c:111 __ext4_new_inode+0xf2c/0x384c fs/ext4/ialloc.c:1079 ext4_whiteout_for_rename+0x1f0/0x3cc fs/ext4/namei.c:3738 ext4_rename fs/ext4/namei.c:3865 [inline] ext4_rename2+0x127c/0x32d0 fs/ext4/namei.c:4200 vfs_rename+0x908/0xcd4 fs/namei.c:4772 ovl_do_rename fs/overlayfs/overlayfs.h:312 [inline] ovl_check_rename_whiteout fs/overlayfs/super.c:1208 [inline] ovl_make_workdir fs/overlayfs/super.c:1329 [inline] ovl_get_workdir+0x954/0x13d4 fs/overlayfs/super.c:1444 ovl_fill_super+0x15b4/0x2240 fs/overlayfs/super.c:2000 mount_nodev+0x68/0x104 fs/super.c:1426 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2091 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #0 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] lock_two_nondirectories+0xc4/0x120 fs/inode.c:1124 vfs_rename+0x5c8/0xcd4 fs/namei.c:4742 do_renameat2+0x980/0x1040 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4953 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 other info that might help us debug this: Chain exists of: &sb->s_type->i_mutex_key#8/4 --> &ei->xattr_sem --> &ea_inode->i_rwsem#8/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ea_inode->i_rwsem#8/1); lock(&ei->xattr_sem); lock(&ea_inode->i_rwsem#8/1); lock(&sb->s_type->i_mutex_key#8/4); *** DEADLOCK *** 5 locks held by syz-executor.0/10669: #0: ffff000131eec460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff000131eec748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename+0x54/0x18c fs/namei.c:2995 #2: ffff000137d60400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff000137d60400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0x94/0x18c fs/namei.c:2999 #3: ffff0000dff38400 (&type->i_mutex_dir_key#3/2){+.+.}-{3:3}, at: lock_rename+0x174/0x18c #4: ffff0000dff38e08 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #4: ffff0000dff38e08 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: lock_two_nondirectories+0xd4/0x120 fs/inode.c:1122 stack backtrace: CPU: 0 PID: 10669 Comm: syz-executor.0 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] lock_two_nondirectories+0xc4/0x120 fs/inode.c:1124 vfs_rename+0x5c8/0xcd4 fs/namei.c:4742 do_renameat2+0x980/0x1040 fs/namei.c:4923 __do_sys_renameat2 fs/namei.c:4956 [inline] __se_sys_renameat2 fs/namei.c:4953 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4953 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591