syz-executor.2 (11093): drop_caches: 1 ====================================================== WARNING: possible circular locking dependency detected 4.14.303-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:26/10161 is trying to acquire lock: (&rl->lock){++++}, at: [] ntfs_read_block fs/ntfs/aops.c:269 [inline] (&rl->lock){++++}, at: [] ntfs_readpage+0x1396/0x1ad0 fs/ntfs/aops.c:456 but task is already holding lock: (&ni->mrec_lock){+.+.}, at: [] map_mft_record+0x2b/0xbe0 fs/ntfs/mft.c:166 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ni->mrec_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 map_mft_record+0x2b/0xbe0 fs/ntfs/mft.c:166 ntfs_truncate+0x1a6/0x22d0 fs/ntfs/inode.c:2415 ntfs_truncate_vfs fs/ntfs/inode.c:2895 [inline] ntfs_setattr+0x148/0x580 fs/ntfs/inode.c:2945 notify_change+0x56b/0xd10 fs/attr.c:315 do_truncate+0xff/0x1a0 fs/open.c:63 handle_truncate fs/namei.c:3010 [inline] do_last fs/namei.c:3437 [inline] path_openat+0x1dcc/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (&rl->lock){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 ntfs_read_block fs/ntfs/aops.c:269 [inline] ntfs_readpage+0x1396/0x1ad0 fs/ntfs/aops.c:456 do_read_cache_page+0x38e/0xc10 mm/filemap.c:2713 read_mapping_page include/linux/pagemap.h:398 [inline] ntfs_map_page fs/ntfs/aops.h:89 [inline] ntfs_sync_mft_mirror+0x1f4/0x1560 fs/ntfs/mft.c:490 write_mft_record_nolock+0xece/0x1240 fs/ntfs/mft.c:793 write_mft_record fs/ntfs/mft.h:109 [inline] __ntfs_write_inode+0x58d/0xcc0 fs/ntfs/inode.c:3084 write_inode fs/fs-writeback.c:1241 [inline] __writeback_single_inode+0x6a4/0x1010 fs/fs-writeback.c:1439 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 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/u4:26/10161: #0: ("writeback"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (&ni->mrec_lock){+.+.}, at: [] map_mft_record+0x2b/0xbe0 fs/ntfs/mft.c:166 stack backtrace: CPU: 0 PID: 10161 Comm: kworker/u4:26 Not tainted 4.14.303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: writeback wb_workfn (flush-7:4) Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 ntfs_read_block fs/ntfs/aops.c:269 [inline] ntfs_readpage+0x1396/0x1ad0 fs/ntfs/aops.c:456 do_read_cache_page+0x38e/0xc10 mm/filemap.c:2713 read_mapping_page include/linux/pagemap.h:398 [inline] ntfs_map_page fs/ntfs/aops.h:89 [inline] ntfs_sync_mft_mirror+0x1f4/0x1560 fs/ntfs/mft.c:490 write_mft_record_nolock+0xece/0x1240 fs/ntfs/mft.c:793 write_mft_record fs/ntfs/mft.h:109 [inline] __ntfs_write_inode+0x58d/0xcc0 fs/ntfs/inode.c:3084 write_inode fs/fs-writeback.c:1241 [inline] __writeback_single_inode+0x6a4/0x1010 fs/fs-writeback.c:1439 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 syz-executor.2 (11178): drop_caches: 1 syz-executor.2 (11178): drop_caches: 1 syz-executor.2 (11236): drop_caches: 1 syz-executor.2 (11236): drop_caches: 1 EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue syz-executor.2 (11287): drop_caches: 1 syz-executor.2 (11287): drop_caches: 1 EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kauditd_printk_skb: 11 callbacks suppressed audit: type=1804 audit(1674499974.143:55): pid=11338 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir1763876251/syzkaller.faBXfK/43/file0/bus" dev="loop3" ino=18 res=1 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674499974.213:56): pid=11359 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir1763876251/syzkaller.faBXfK/43/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1674499974.263:57): pid=11343 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/36/file0/bus" dev="loop2" ino=18 res=1 audit: type=1804 audit(1674499974.323:58): pid=11353 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1069429485/syzkaller.2M4HcT/31/file0/bus" dev="loop4" ino=18 res=1 audit: type=1804 audit(1674499974.323:59): pid=11367 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/36/file0/bus" dev="loop2" ino=18 res=1 audit: type=1804 audit(1674499974.373:60): pid=11370 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir1069429485/syzkaller.2M4HcT/31/file0/bus" dev="loop4" ino=18 res=1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674499974.874:61): pid=11377 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3400575234/syzkaller.WGyDKl/34/file0/bus" dev="loop5" ino=18 res=1 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674499974.904:62): pid=11379 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir1763876251/syzkaller.faBXfK/44/file0/bus" dev="loop3" ino=18 res=1 audit: type=1804 audit(1674499974.934:63): pid=11393 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1069429485/syzkaller.2M4HcT/32/file0/bus" dev="loop4" ino=18 res=1 audit: type=1804 audit(1674499974.934:64): pid=11378 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/37/file0/bus" dev="loop2" ino=18 res=1 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue syz-executor.2 (11433) used greatest stack depth: 24320 bytes left EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue kauditd_printk_skb: 32 callbacks suppressed audit: type=1804 audit(1674499980.274:97): pid=11780 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/47/file0/bus" dev="loop2" ino=22 res=1 audit: type=1804 audit(1674499981.434:98): pid=11799 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/48/file0/bus" dev="loop2" ino=22 res=1 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns audit: type=1804 audit(1674499981.684:99): pid=11815 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/49/file0/bus" dev="loop2" ino=22 res=1 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns audit: type=1804 audit(1674499981.974:100): pid=11830 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3329520053/syzkaller.AMXqkt/50/file0/bus" dev="loop2" ino=22 res=1