REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc5-syzkaller-g249eb8f39efb #0 Not tainted ------------------------------------------------------ syz-executor191/6008 is trying to acquire lock: ffff0000dc548980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] ffff0000dc548980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:128 [inline] ffff0000dc548980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 but task is already holding lock: ffff0000db390090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x68/0xd8 fs/reiserfs/lock.c:78 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_mkdir+0x280/0x77c fs/reiserfs/namei.c:829 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] open_xa_root fs/reiserfs/xattr.c:137 [inline] open_xa_dir+0x288/0x578 fs/reiserfs/xattr.c:153 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396 reiserfs_xattr_set_handle+0xe0/0xe94 fs/reiserfs/xattr.c:535 reiserfs_security_write+0x13c/0x1d0 fs/reiserfs/xattr_security.c:107 reiserfs_new_inode+0x10f0/0x16f8 fs/reiserfs/inode.c:2109 reiserfs_create+0x33c/0x5a4 fs/reiserfs/namei.c:666 lookup_open fs/namei.c:3495 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xf80/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x3370/0x75e8 kernel/locking/lockdep.c:5136 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:837 [inline] open_xa_root fs/reiserfs/xattr.c:128 [inline] open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396 reiserfs_xattr_get+0xf0/0x96c fs/reiserfs/xattr.c:679 security_get+0x94/0xd0 fs/reiserfs/xattr_security.c:19 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:424 smk_fetch+0xc8/0x150 security/smack/smack_lsm.c:304 smack_d_instantiate+0x594/0x880 security/smack/smack_lsm.c:3573 security_d_instantiate+0x98/0xf0 security/security.c:3799 d_instantiate_new+0x64/0x120 fs/dcache.c:2052 reiserfs_create+0x520/0x5a4 fs/reiserfs/namei.c:692 lookup_open fs/namei.c:3495 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xf80/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#6/3); lock(&sbi->lock); lock(&type->i_mutex_dir_key#6/3); *** DEADLOCK *** 3 locks held by syz-executor191/6008: #0: ffff0000d4b40410 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:403 #1: ffff0000dc5482e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff0000dc5482e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3560 [inline] #1: ffff0000dc5482e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x5f0/0x27f8 fs/namei.c:3793 #2: ffff0000db390090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x68/0xd8 fs/reiserfs/lock.c:78 stack backtrace: CPU: 1 PID: 6008 Comm: syz-executor191 Not tainted 6.6.0-rc5-syzkaller-g249eb8f39efb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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:2060 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x3370/0x75e8 kernel/locking/lockdep.c:5136 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:837 [inline] open_xa_root fs/reiserfs/xattr.c:128 [inline] open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396 reiserfs_xattr_get+0xf0/0x96c fs/reiserfs/xattr.c:679 security_get+0x94/0xd0 fs/reiserfs/xattr_security.c:19 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:424 smk_fetch+0xc8/0x150 security/smack/smack_lsm.c:304 smack_d_instantiate+0x594/0x880 security/smack/smack_lsm.c:3573 security_d_instantiate+0x98/0xf0 security/security.c:3799 d_instantiate_new+0x64/0x120 fs/dcache.c:2052 reiserfs_create+0x520/0x5a4 fs/reiserfs/namei.c:692 lookup_open fs/namei.c:3495 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0xf80/0x27f8 fs/namei.c:3793 do_filp_open+0x1bc/0x3cc fs/namei.c:3823 do_sys_openat2+0x124/0x1b8 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595