REISERFS (device loop3): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS warning (device loop3): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount. ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc2-syzkaller-00069-g0ddc84d2dd43 #0 Not tainted ------------------------------------------------------ syz-executor.3/4566 is trying to acquire lock: ffff88802bc36090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 but task is already holding lock: ffff88802b846460 (sb_writers#42){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2181 [inline] ffff88802b846460 (sb_writers#42){.+.+}-{0:0}, at: iterate_dir+0x488/0x570 fs/readdir.c:70 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sb_writers#42){.+.+}-{0:0}: lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1477 [inline] sb_start_write+0x4d/0x1c0 include/linux/fs.h:1552 mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438 reiserfs_ioctl+0x174/0x340 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&sbi->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xf2/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x305/0xd90 fs/fs-writeback.c:2421 generic_update_time fs/inode.c:1860 [inline] inode_update_time fs/inode.c:1873 [inline] touch_atime+0x3fe/0x680 fs/inode.c:1945 file_accessed include/linux/fs.h:2181 [inline] iterate_dir+0x488/0x570 fs/readdir.c:70 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#42); lock(&sbi->lock); lock(sb_writers#42); lock(&sbi->lock); *** DEADLOCK *** 3 locks held by syz-executor.3/4566: #0: ffff8880214fc5e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047 #1: ffff888043bd7a20 (&type->i_mutex_dir_key#25){++++}-{3:3}, at: iterate_dir+0x10e/0x570 fs/readdir.c:55 #2: ffff88802b846460 (sb_writers#42){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2181 [inline] #2: ffff88802b846460 (sb_writers#42){.+.+}-{0:0}, at: iterate_dir+0x488/0x570 fs/readdir.c:70 stack backtrace: CPU: 1 PID: 4566 Comm: syz-executor.3 Not tainted 6.3.0-rc2-syzkaller-00069-g0ddc84d2dd43 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xf2/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x305/0xd90 fs/fs-writeback.c:2421 generic_update_time fs/inode.c:1860 [inline] inode_update_time fs/inode.c:1873 [inline] touch_atime+0x3fe/0x680 fs/inode.c:1945 file_accessed include/linux/fs.h:2181 [inline] iterate_dir+0x488/0x570 fs/readdir.c:70 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb605e8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb606c46168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007fb605fabf80 RCX: 00007fb605e8c0f9 RDX: 0000000000000ffa RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007fb605ee7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeddeff79f R14: 00007fb606c46300 R15: 0000000000022000