====================================================== WARNING: possible circular locking dependency detected 5.15.102-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:2/10660 is trying to acquire lock: ffff8880761f2200 (&rl->lock){++++}-{3:3}, at: ntfs_read_block fs/ntfs/aops.c:248 [inline] ffff8880761f2200 (&rl->lock){++++}-{3:3}, at: ntfs_readpage+0x123e/0x2210 fs/ntfs/aops.c:435 but task is already holding lock: ffff8880761f5410 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->mrec_lock){+.+.}-{3:3}: lock_acquire+0x1ff/0x570 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+0xdad/0x1060 fs/attr.c:426 do_truncate+0x217/0x300 fs/open.c:65 handle_truncate fs/namei.c:3136 [inline] do_open fs/namei.c:3484 [inline] path_openat+0x2866/0x2ee0 fs/namei.c:3615 do_filp_open+0x21c/0x460 fs/namei.c:3642 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 -> #0 (&rl->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+0x1ff/0x570 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+0x1164/0x16c0 fs/ntfs/mft.c:787 write_mft_record fs/ntfs/mft.h:95 [inline] __ntfs_write_inode+0x7b4/0xdd0 fs/ntfs/inode.c:3050 write_inode fs/fs-writeback.c:1475 [inline] __writeback_single_inode+0x808/0x1210 fs/fs-writeback.c:1680 writeback_sb_inodes+0xbd8/0x1ac0 fs/fs-writeback.c:1905 wb_writeback+0x4b8/0xeb0 fs/fs-writeback.c:2079 wb_do_writeback fs/fs-writeback.c:2222 [inline] wb_workfn+0x49a/0x10e0 fs/fs-writeback.c:2263 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 :298 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ni->mrec_lock); lock(&rl->lock); lock(&ni->mrec_lock); lock(&rl->lock); *** DEADLOCK *** 3 locks held by kworker/u4:2/10660: #0: ffff8881427b4138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279 #1: ffffc90002e7fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281 #2: ffff8880761f5410 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 stack backtrace: CPU: 1 PID: 10660 Comm: kworker/u4:2 Not tainted 5.15.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: writeback wb_workfn (flush-7:1) 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+0x1ff/0x570 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+0x1164/0x16c0 fs/ntfs/mft.c:787 write_mft_record fs/ntfs/mft.h:95 [inline] __ntfs_write_inode+0x7b4/0xdd0 fs/ntfs/inode.c:3050 write_inode fs/fs-writeback.c:1475 [inline] __writeback_single_inode+0x808/0x1210 fs/fs-writeback.c:1680 writeback_sb_inodes+0xbd8/0x1ac0 fs/fs-writeback.c:1905 wb_writeback+0x4b8/0xeb0 fs/fs-writeback.c:2079 wb_do_writeback fs/fs-writeback.c:2222 [inline] wb_workfn+0x49a/0x10e0 fs/fs-writeback.c:2263 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 :298