REISERFS (device loop0): Using tea hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc1-syzkaller-00021-g962490525cff #0 Not tainted ------------------------------------------------------ syz-executor.0/6408 is trying to acquire lock: ffff0000df6502e0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] ffff0000df6502e0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: vfs_fileattr_set+0x110/0xad4 fs/ioctl.c:682 but task is already holding lock: ffff0000d30a4420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:453 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#12){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1662 [inline] sb_start_write+0x60/0x2ec include/linux/fs.h:1798 mnt_want_write_file+0x64/0x1e8 fs/namespace.c:453 reiserfs_ioctl+0x188/0x42c fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x128/0x45c fs/reiserfs/namei.c:364 __lookup_slow+0x250/0x374 fs/namei.c:1692 lookup_one_len+0x178/0x28c fs/namei.c:2756 reiserfs_lookup_privroot+0x8c/0x184 fs/reiserfs/xattr.c:977 reiserfs_fill_super+0x1bc0/0x2028 fs/reiserfs/super.c:2173 mount_bdev+0x1d4/0x2a0 fs/super.c:1676 get_super_block+0x44/0x58 fs/reiserfs/super.c:2600 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1797 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 -> #0 (&type->i_mutex_dir_key#8){+.+.}-{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:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 down_write+0x50/0xc0 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:793 [inline] vfs_fileattr_set+0x110/0xad4 fs/ioctl.c:682 do_vfs_ioctl+0x16ec/0x2ab0 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#8 --> &sbi->lock --> sb_writers#12 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_writers#12); lock(&sbi->lock); lock(sb_writers#12); lock(&type->i_mutex_dir_key#8); *** DEADLOCK *** 1 lock held by syz-executor.0/6408: #0: ffff0000d30a4420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:453 stack backtrace: CPU: 0 PID: 6408 Comm: syz-executor.0 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 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:3869 [inline] __lock_acquire+0x3384/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754 down_write+0x50/0xc0 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:793 [inline] vfs_fileattr_set+0x110/0xad4 fs/ioctl.c:682 do_vfs_ioctl+0x16ec/0x2ab0 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598