====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz-executor/6423 is trying to acquire lock: ffff8880611fdbc0 (&rl->lock){++++}-{3:3}, at: ntfs_read_block fs/ntfs/aops.c:248 [inline] ffff8880611fdbc0 (&rl->lock){++++}-{3:3}, at: ntfs_readpage+0x1294/0x2260 fs/ntfs/aops.c:435 but task is already holding lock: ffff8880611d0190 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4e/0x620 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+0x1e3/0x2400 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+0x4e/0x620 fs/ntfs/mft.c:154 ntfs_map_runlist_nolock+0x3f6/0x1760 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_readpage+0x155c/0x2260 fs/ntfs/aops.c:435 read_pages+0x61f/0x930 mm/readahead.c:145 page_cache_ra_unbounded+0x838/0x940 mm/readahead.c:239 page_cache_sync_readahead include/linux/pagemap.h:833 [inline] filemap_get_pages mm/filemap.c:2551 [inline] filemap_read+0x5de/0x2540 mm/filemap.c:2634 __kernel_read+0x517/0x960 fs/read_write.c:443 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+0x931/0x1920 security/integrity/ima/ima_crypto.c:573 ima_collect_measurement+0x337/0x7c0 security/integrity/ima/ima_api.c:255 process_measurement+0x113a/0x1ba0 security/integrity/ima/ima_main.c:351 ima_file_check+0xc7/0x110 security/integrity/ima/ima_main.c:533 do_open fs/namei.c:3618 [inline] path_openat+0x27a8/0x2fa0 fs/namei.c:3750 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_readpage+0x1294/0x2260 fs/ntfs/aops.c:435 do_read_cache_page+0x8a1/0x1030 mm/filemap.c:-1 read_mapping_page include/linux/pagemap.h:515 [inline] ntfs_map_page+0x24/0x390 fs/ntfs/aops.h:75 ntfs_sync_mft_mirror+0x26c/0x1a20 fs/ntfs/mft.c:480 write_mft_record_nolock+0x14d9/0x1810 fs/ntfs/mft.c:805 write_mft_record fs/ntfs/mft.h:95 [inline] __ntfs_write_inode+0x7cb/0xdc0 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+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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/6423: #0: ffff88802bdfc0e0 (&type->s_umount_key#64){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffff8880611d0190 (&ni->mrec_lock){+.+.}-{3:3}, at: map_mft_record+0x4e/0x620 fs/ntfs/mft.c:154 stack backtrace: CPU: 0 PID: 6423 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ntfs_read_block fs/ntfs/aops.c:248 [inline] ntfs_readpage+0x1294/0x2260 fs/ntfs/aops.c:435 do_read_cache_page+0x8a1/0x1030 mm/filemap.c:-1 read_mapping_page include/linux/pagemap.h:515 [inline] ntfs_map_page+0x24/0x390 fs/ntfs/aops.h:75 ntfs_sync_mft_mirror+0x26c/0x1a20 fs/ntfs/mft.c:480 write_mft_record_nolock+0x14d9/0x1810 fs/ntfs/mft.c:805 write_mft_record fs/ntfs/mft.h:95 [inline] __ntfs_write_inode+0x7cb/0xdc0 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+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fafb82ea1d7 Code: a2 c7 05 bc e3 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fff83d61a68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fafb837ec3b RCX: 00007fafb82ea1d7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff83d61b20 RBP: 00007fff83d61b20 R08: 00007fff83d62b20 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff83d62bb0 R13: 00007fafb837ec3b R14: 000000000002ca78 R15: 00007fff83d62bf0