====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/4481 is trying to acquire lock: ffff888073fb4b40 (&rl->lock){++++}-{3:3}, at: ntfs_read_block fs/ntfs/aops.c:248 [inline] ffff888073fb4b40 (&rl->lock){++++}-{3:3}, at: ntfs_read_folio+0x1446/0x2980 fs/ntfs/aops.c:436 but task is already holding lock: ffff888073fb2ad0 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4c/0x650 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}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747 map_mft_record+0x4c/0x650 fs/ntfs/mft.c:154 ntfs_map_runlist_nolock+0x3fb/0x1640 fs/ntfs/attrib.c:91 ntfs_map_runlist+0x7e/0xa0 fs/ntfs/attrib.c:292 ntfs_read_block fs/ntfs/aops.c:283 [inline] ntfs_read_folio+0x179c/0x2980 fs/ntfs/aops.c:436 read_pages+0x5fd/0x840 mm/readahead.c:181 page_cache_ra_unbounded+0x690/0x770 mm/readahead.c:270 page_cache_sync_readahead include/linux/pagemap.h:1250 [inline] filemap_get_pages mm/filemap.c:2665 [inline] filemap_read+0x5ff/0x2f80 mm/filemap.c:2759 generic_file_read_iter+0x115/0x670 mm/filemap.c:2941 __kernel_read+0x2dc/0x6b0 fs/read_write.c:428 integrity_kernel_read+0x86/0xd0 security/integrity/iint.c:228 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+0x96b/0x17c0 security/integrity/ima/ima_crypto.c:573 ima_collect_measurement+0x4b3/0xac0 security/integrity/ima/ima_api.c:293 process_measurement+0xfae/0x1a10 security/integrity/ima/ima_main.c:351 ima_file_check+0xc2/0x100 security/integrity/ima/ima_main.c:534 do_open fs/namei.c:3636 [inline] path_openat+0x2679/0x2e70 fs/namei.c:3791 do_filp_open+0x1c1/0x3c0 fs/namei.c:3818 do_sys_openat2+0x142/0x490 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&rl->lock){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_read_folio+0x1446/0x2980 fs/ntfs/aops.c:436 filemap_read_folio+0x160/0x760 mm/filemap.c:2490 do_read_cache_folio+0x2a0/0x760 mm/filemap.c:3659 do_read_cache_page+0x32/0x220 mm/filemap.c:3701 read_mapping_page include/linux/pagemap.h:793 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0x232/0x1aa0 fs/ntfs/mft.c:480 write_mft_record_nolock+0x1403/0x18c0 fs/ntfs/mft.c:805 write_mft_record+0x136/0x300 fs/ntfs/mft.h:95 __ntfs_write_inode+0x724/0xbf0 fs/ntfs/inode.c:3050 ntfs_commit_inode fs/ntfs/inode.h:300 [inline] ntfs_put_super+0xa3/0x1070 fs/ntfs/super.c:2260 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191 task_work_run+0x1ca/0x250 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 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 *** 2 locks held by syz-executor/4481: #0: ffff8880610fc0e0 (&type->s_umount_key#78){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362 #1: ffff888073fb2ad0 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4c/0x650 fs/ntfs/mft.c:154 stack backtrace: CPU: 0 PID: 4481 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_read_folio+0x1446/0x2980 fs/ntfs/aops.c:436 filemap_read_folio+0x160/0x760 mm/filemap.c:2490 do_read_cache_folio+0x2a0/0x760 mm/filemap.c:3659 do_read_cache_page+0x32/0x220 mm/filemap.c:3701 read_mapping_page include/linux/pagemap.h:793 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] ntfs_sync_mft_mirror+0x232/0x1aa0 fs/ntfs/mft.c:480 write_mft_record_nolock+0x1403/0x18c0 fs/ntfs/mft.c:805 write_mft_record+0x136/0x300 fs/ntfs/mft.h:95 __ntfs_write_inode+0x724/0xbf0 fs/ntfs/inode.c:3050 ntfs_commit_inode fs/ntfs/inode.h:300 [inline] ntfs_put_super+0xa3/0x1070 fs/ntfs/super.c:2260 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191 task_work_run+0x1ca/0x250 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7febc1590a77 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffe4f1be4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007febc1613d7d RCX: 00007febc1590a77 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe4f1be590 RBP: 00007ffe4f1be590 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe4f1bf620 R13: 00007febc1613d7d R14: 00000000000364d2 R15: 00007ffe4f1bf660