REISERFS warning (device loop0): sh-2029: %s: bitmap block (#%u) reading failed reiserfs_read_bitmap_block: reiserfs_read_bitmap_block ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc2-syzkaller-00002-g026e680b0a08 #0 Not tainted ------------------------------------------------------ syz-executor.0/5983 is trying to acquire lock: ffff0000dba20980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] ffff0000dba20980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:128 [inline] ffff0000dba20980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 but task is already holding lock: ffff0000d1c81090 (&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: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_mkdir+0x280/0x77c fs/reiserfs/namei.c:822 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+0xe0/0xe8c fs/reiserfs/xattr.c:535 __reiserfs_set_acl+0x438/0x578 fs/reiserfs/xattr_acl.c:277 reiserfs_set_acl+0x44c/0x62c fs/reiserfs/xattr_acl.c:51 set_posix_acl fs/posix_acl.c:955 [inline] vfs_set_acl+0x764/0x990 fs/posix_acl.c:1134 do_set_acl+0xe4/0x1ac fs/posix_acl.c:1279 do_setxattr fs/xattr.c:626 [inline] setxattr+0x230/0x29c fs/xattr.c:652 __do_sys_fsetxattr fs/xattr.c:708 [inline] __se_sys_fsetxattr fs/xattr.c:697 [inline] __arm64_sys_fsetxattr+0x1a8/0x224 fs/xattr.c:697 __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){+.+.}-{3:3}: 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_nested+0x58/0xcc kernel/locking/rwsem.c:1695 inode_lock_nested include/linux/fs.h:828 [inline] open_xa_root fs/reiserfs/xattr.c:128 [inline] open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 reiserfs_for_each_xattr+0x16c/0x8d8 fs/reiserfs/xattr.c:253 reiserfs_delete_xattrs+0x2c/0xa4 fs/reiserfs/xattr.c:365 reiserfs_evict_inode+0x1dc/0x3f0 fs/reiserfs/inode.c:53 evict+0x260/0x68c fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput+0x760/0x844 fs/inode.c:1767 reiserfs_new_inode+0x5a0/0x1698 fs/reiserfs/inode.c:2148 reiserfs_mkdir+0x4ac/0x77c fs/reiserfs/namei.c:836 vfs_mkdir+0x27c/0x3e4 fs/namei.c:4126 do_mkdirat+0x248/0x574 fs/namei.c:4149 __do_sys_mkdirat fs/namei.c:4164 [inline] __se_sys_mkdirat fs/namei.c:4162 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4162 __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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#8/3); lock(&sbi->lock); lock(&type->i_mutex_dir_key#8/3); *** DEADLOCK *** 3 locks held by syz-executor.0/5983: #0: ffff0000d2cfc420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:409 #1: ffff0000dba202e0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] #1: ffff0000dba202e0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3892 #2: ffff0000d1c81090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x68/0xd8 fs/reiserfs/lock.c:78 stack backtrace: CPU: 0 PID: 5983 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00002-g026e680b0a08 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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_nested+0x58/0xcc kernel/locking/rwsem.c:1695 inode_lock_nested include/linux/fs.h:828 [inline] open_xa_root fs/reiserfs/xattr.c:128 [inline] open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153 reiserfs_for_each_xattr+0x16c/0x8d8 fs/reiserfs/xattr.c:253 reiserfs_delete_xattrs+0x2c/0xa4 fs/reiserfs/xattr.c:365 reiserfs_evict_inode+0x1dc/0x3f0 fs/reiserfs/inode.c:53 evict+0x260/0x68c fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput+0x760/0x844 fs/inode.c:1767 reiserfs_new_inode+0x5a0/0x1698 fs/reiserfs/inode.c:2148 reiserfs_mkdir+0x4ac/0x77c fs/reiserfs/namei.c:836 vfs_mkdir+0x27c/0x3e4 fs/namei.c:4126 do_mkdirat+0x248/0x574 fs/namei.c:4149 __do_sys_mkdirat fs/namei.c:4164 [inline] __se_sys_mkdirat fs/namei.c:4162 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4162 __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