REISERFS (device loop3): Using tea hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.1.58-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/10385 is trying to acquire lock: ffff000104a82090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 but task is already holding lock: ffff0000df249d60 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] ffff0000df249d60 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: filename_create+0x200/0x464 fs/namei.c:3807 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}: down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689 inode_lock_nested include/linux/fs.h:791 [inline] filename_create+0x200/0x464 fs/namei.c:3807 do_mknodat+0x1a0/0x674 fs/namei.c:3952 __do_sys_mknodat fs/namei.c:3993 [inline] __se_sys_mknodat fs/namei.c:3990 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:3990 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 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 (sb_writers#20){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1832 [inline] sb_start_write+0x7c/0x308 include/linux/fs.h:1907 mnt_want_write_file+0x64/0x1e8 fs/namespace.c:437 reiserfs_ioctl+0x184/0x454 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+0x14c/0x1c8 fs/ioctl.c:856 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 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 (&sbi->lock){+.+.}-{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:3824 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5048 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x130/0x3c4 fs/reiserfs/namei.c:364 __lookup_hash+0x108/0x230 fs/namei.c:1601 filename_create+0x22c/0x464 fs/namei.c:3808 do_mknodat+0x1a0/0x674 fs/namei.c:3952 __do_sys_mknodat fs/namei.c:3993 [inline] __se_sys_mknodat fs/namei.c:3990 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:3990 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 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: &sbi->lock --> sb_writers#20 --> &type->i_mutex_dir_key#12/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&type->i_mutex_dir_key#12/1); lock(sb_writers#20); lock(&type->i_mutex_dir_key#12/1); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor.3/10385: #0: ffff0001091d4460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393 #1: ffff0000df249d60 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff0000df249d60 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: filename_create+0x200/0x464 fs/namei.c:3807 stack backtrace: CPU: 1 PID: 10385 Comm: syz-executor.3 Not tainted 6.1.58-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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+0x150/0x1b8 kernel/locking/lockdep.c:2048 check_noncircular+0x2cc/0x378 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:3824 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5048 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x130/0x3c4 fs/reiserfs/namei.c:364 __lookup_hash+0x108/0x230 fs/namei.c:1601 filename_create+0x22c/0x464 fs/namei.c:3808 do_mknodat+0x1a0/0x674 fs/namei.c:3952 __do_sys_mknodat fs/namei.c:3993 [inline] __se_sys_mknodat fs/namei.c:3990 [inline] __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:3990 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 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