REISERFS (device loop2): Using tea hash to sort names REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.1.116-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/3985 is trying to acquire lock: ffff0000d04c0908 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] ffff0000d04c0908 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0xfc/0x210 fs/namei.c:3876 but task is already holding lock: ffff0000d17d8450 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:393 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#11){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_write+0x68/0x1f4 include/linux/fs.h:1966 mnt_want_write_file+0x28/0xd8 fs/namespace.c:437 reiserfs_ioctl+0x118/0x2a0 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xd0/0x148 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x48/0x174 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x13c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x94/0xce8 kernel/locking/mutex.c:747 mutex_lock_nested+0x30/0x3c kernel/locking/mutex.c:799 reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27 reiserfs_lookup+0xa4/0x1c4 fs/reiserfs/namei.c:364 lookup_one_qstr_excl+0xa0/0x164 fs/namei.c:1605 filename_create+0x10c/0x210 fs/namei.c:3877 do_mkdirat+0x50/0x32c fs/namei.c:4121 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x40/0x54 fs/namei.c:4144 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x48/0x174 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x13c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x135c/0x27a0 kernel/locking/lockdep.c:5049 lock_acquire+0x130/0x2a4 kernel/locking/lockdep.c:5662 down_write_nested+0x40/0x6c kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] filename_create+0xfc/0x210 fs/namei.c:3876 do_mkdirat+0x50/0x32c fs/namei.c:4121 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x40/0x54 fs/namei.c:4144 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x48/0x174 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x13c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#8/1 --> &sbi->lock --> sb_writers#11 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#11); lock(&sbi->lock); lock(sb_writers#11); lock(&type->i_mutex_dir_key#8/1); *** DEADLOCK *** 1 lock held by syz-executor.2/3985: #0: ffff0000d17d8450 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:393 stack backtrace: CPU: 0 PID: 3985 Comm: syz-executor.2 Not tainted 6.1.116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x2d8/0x2f0 kernel/locking/lockdep.c:2048 check_noncircular+0x114/0x11c kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x135c/0x27a0 kernel/locking/lockdep.c:5049 lock_acquire+0x130/0x2a4 kernel/locking/lockdep.c:5662 down_write_nested+0x40/0x6c kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:793 [inline] filename_create+0xfc/0x210 fs/namei.c:3876 do_mkdirat+0x50/0x32c fs/namei.c:4121 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x40/0x54 fs/namei.c:4144 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xbc/0x180 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x48/0x174 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x13c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585