====================================================== WARNING: possible circular locking dependency detected 6.8.0-rc2-syzkaller-00031-g861c0981648f #0 Not tainted ------------------------------------------------------ kworker/u4:8/10433 is trying to acquire lock: ffff888052834300 (&rl->lock){++++}-{3:3}, at: ntfs_read_block fs/ntfs/aops.c:242 [inline] ffff888052834300 (&rl->lock){++++}-{3:3}, at: ntfs_read_folio+0x1308/0x23e0 fs/ntfs/aops.c:430 but task is already holding lock: ffff8880525e0190 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4c/0x630 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+0x1e3/0x530 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd60 kernel/locking/mutex.c:752 map_mft_record+0x4c/0x630 fs/ntfs/mft.c:154 ntfs_map_runlist_nolock+0x4b8/0x1790 fs/ntfs/attrib.c:91 ntfs_map_runlist+0x82/0xa0 fs/ntfs/attrib.c:292 ntfs_read_block fs/ntfs/aops.c:277 [inline] ntfs_read_folio+0x153c/0x23e0 fs/ntfs/aops.c:430 read_pages+0x5f0/0x830 mm/readahead.c:180 page_cache_ra_unbounded+0x68e/0x7c0 mm/readahead.c:269 page_cache_sync_readahead include/linux/pagemap.h:1300 [inline] filemap_get_pages+0x49c/0x2080 mm/filemap.c:2498 filemap_read+0x41b/0xec0 mm/filemap.c:2594 __kernel_read+0x5c3/0xaa0 fs/read_write.c:434 integrity_kernel_read+0xb0/0xf0 security/integrity/iint.c:221 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline] ima_calc_file_hash+0xad1/0x1b30 security/integrity/ima/ima_crypto.c:573 ima_collect_measurement+0x554/0xb30 security/integrity/ima/ima_api.c:290 process_measurement+0x1373/0x21c0 security/integrity/ima/ima_main.c:359 ima_file_check+0xf1/0x170 security/integrity/ima/ima_main.c:557 do_open fs/namei.c:3643 [inline] path_openat+0x287a/0x31e0 fs/namei.c:3798 do_filp_open+0x234/0x490 fs/namei.c:3825 do_sys_openat2+0x13e/0x1d0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_open fs/open.c:1427 [inline] __se_sys_open fs/open.c:1423 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1423 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #0 (&rl->lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x1909/0x5ab0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ntfs_read_block fs/ntfs/aops.c:242 [inline] ntfs_read_folio+0x1308/0x23e0 fs/ntfs/aops.c:430 filemap_read_folio+0x19c/0x780 mm/filemap.c:2324 do_read_cache_folio+0x134/0x810 mm/filemap.c:3703 do_read_cache_page+0x30/0x200 mm/filemap.c:3769 read_mapping_page include/linux/pagemap.h:888 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0x25f/0x1ae0 fs/ntfs/mft.c:480 write_mft_record_nolock+0x1155/0x18f0 fs/ntfs/mft.c:787 write_mft_record+0x149/0x310 fs/ntfs/mft.h:95 __ntfs_write_inode+0x703/0xbb0 fs/ntfs/inode.c:3052 write_inode fs/fs-writeback.c:1473 [inline] __writeback_single_inode+0x69b/0xfc0 fs/fs-writeback.c:1690 writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916 wb_writeback+0x44d/0xc70 fs/fs-writeback.c:2092 wb_do_writeback fs/fs-writeback.c:2239 [inline] wb_workfn+0x400/0xfb0 fs/fs-writeback.c:2279 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 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); rlock(&rl->lock); *** DEADLOCK *** 3 locks held by kworker/u4:8/10433: #0: ffff88801768dd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff88801768dd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90014717d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90014717d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffff8880525e0190 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4c/0x630 fs/ntfs/mft.c:154 stack backtrace: CPU: 1 PID: 10433 Comm: kworker/u4:8 Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: writeback wb_workfn (flush-7:2) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x366/0x490 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+0x1909/0x5ab0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ntfs_read_block fs/ntfs/aops.c:242 [inline] ntfs_read_folio+0x1308/0x23e0 fs/ntfs/aops.c:430 filemap_read_folio+0x19c/0x780 mm/filemap.c:2324 do_read_cache_folio+0x134/0x810 mm/filemap.c:3703 do_read_cache_page+0x30/0x200 mm/filemap.c:3769 read_mapping_page include/linux/pagemap.h:888 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0x25f/0x1ae0 fs/ntfs/mft.c:480 write_mft_record_nolock+0x1155/0x18f0 fs/ntfs/mft.c:787 write_mft_record+0x149/0x310 fs/ntfs/mft.h:95 __ntfs_write_inode+0x703/0xbb0 fs/ntfs/inode.c:3052 write_inode fs/fs-writeback.c:1473 [inline] __writeback_single_inode+0x69b/0xfc0 fs/fs-writeback.c:1690 writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916 wb_writeback+0x44d/0xc70 fs/fs-writeback.c:2092 wb_do_writeback fs/fs-writeback.c:2239 [inline] wb_workfn+0x400/0xfb0 fs/fs-writeback.c:2279 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242