====================================================== WARNING: possible circular locking dependency detected 5.15.105-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/29539 is trying to acquire lock: ffff888070ad4390 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 but task is already holding lock: ffff888070ad4300 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x1e3/0x2860 fs/ntfs/inode.c:2378 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rl->lock){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_read+0x3b/0x50 kernel/locking/rwsem.c:1488 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_readpage+0x123e/0x2210 fs/ntfs/aops.c:435 do_read_cache_page+0x752/0x1040 read_mapping_page include/linux/pagemap.h:515 [inline] ntfs_map_page+0x25/0x390 fs/ntfs/aops.h:75 ntfs_sync_mft_mirror+0x253/0x19e0 fs/ntfs/mft.c:480 write_mft_record_nolock+0x140c/0x16c0 fs/ntfs/mft.c:805 write_mft_record fs/ntfs/mft.h:95 [inline] __ntfs_write_inode+0x7b4/0xdd0 fs/ntfs/inode.c:3050 ntfs_commit_inode fs/ntfs/inode.h:300 [inline] ntfs_put_super+0x676/0xf80 fs/ntfs/super.c:2307 generic_shutdown_super+0x136/0x2c0 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1405 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x6a3/0x2480 kernel/exit.c:872 do_group_exit+0x144/0x310 kernel/exit.c:994 get_signal+0xc66/0x14e0 kernel/signal.c:2889 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #0 (&ni->mrec_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 ntfs_truncate+0x263/0x2860 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x2c7/0x3a0 fs/ntfs/inode.c:2914 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rl->lock); lock(&ni->mrec_lock); lock(&rl->lock); lock(&ni->mrec_lock); *** DEADLOCK *** 3 locks held by syz-executor.1/29539: #0: ffff888018464460 (sb_writers#35){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff888070ad4670 (&sb->s_type->i_mutex_key#43){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888070ad4670 (&sb->s_type->i_mutex_key#43){+.+.}-{3:3}, at: do_truncate+0x208/0x300 fs/open.c:63 #2: ffff888070ad4300 (&rl->lock){++++}-{3:3}, at: ntfs_truncate+0x1e3/0x2860 fs/ntfs/inode.c:2378 stack backtrace: CPU: 1 PID: 29539 Comm: syz-executor.1 Not tainted 5.15.105-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 ntfs_truncate+0x263/0x2860 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x2c7/0x3a0 fs/ntfs/inode.c:2914 notify_change+0xd4d/0x1000 fs/attr.c:488 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x28a0/0x2f20 fs/namei.c:3672 do_filp_open+0x21c/0x460 fs/namei.c:3699 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f64a88e7169 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:00007f64a6e59168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f64a8a06f80 RCX: 00007f64a88e7169 RDX: 0000000000103a42 RSI: 0000000020000380 RDI: ffffffffffffff9c RBP: 00007f64a8942ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff77773b0f R14: 00007f64a6e59300 R15: 0000000000022000