ntfs: volume version 3.1.
syz-executor.5 (9968): drop_caches: 1
======================================================
WARNING: possible circular locking dependency detected
4.14.304-syzkaller #0 Not tainted
------------------------------------------------------
kworker/u4:5/7026 is trying to acquire lock:
(&rl->lock){++++}, at: [<ffffffff82102b36>] ntfs_read_block fs/ntfs/aops.c:269 [inline]
(&rl->lock){++++}, at: [<ffffffff82102b36>] ntfs_readpage+0x1396/0x1ad0 fs/ntfs/aops.c:456
but task is already holding lock:
(&ni->mrec_lock){+.+.}, at: [<ffffffff8213db1b>] 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/u4:5/7026:
#0: ("writeback"){+.+.}, at: [<ffffffff81365fe0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((&(&wb->dwork)->work)){+.+.}, at: [<ffffffff81366016>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (&ni->mrec_lock){+.+.}, at: [<ffffffff8213db1b>] map_mft_record+0x2b/0xbe0 fs/ntfs/mft.c:166
stack backtrace:
CPU: 1 PID: 7026 Comm: kworker/u4:5 Not tainted 4.14.304-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.5 (9968): drop_caches: 1
FAT-fs (loop1): Directory bread(block 64) failed
FAT-fs (loop1): Directory bread(block 65) failed
FAT-fs (loop1): Directory bread(block 66) failed
FAT-fs (loop1): Directory bread(block 67) failed
FAT-fs (loop1): Directory bread(block 68) failed
FAT-fs (loop1): Directory bread(block 69) failed
FAT-fs (loop1): Directory bread(block 70) failed
FAT-fs (loop1): Directory bread(block 71) failed
FAT-fs (loop1): Directory bread(block 72) failed
FAT-fs (loop1): Directory bread(block 73) failed
syz-executor.5 (10067): drop_caches: 1
syz-executor.5 (10067): drop_caches: 1
audit: type=1804 audit(1674558385.280:2): pid=10172 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir2857344839/syzkaller.G2VK8k/26/bus/bus" dev="loop0" ino=21 res=1
audit: type=1800 audit(1674558385.310:3): pid=10172 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="loop0" ino=21 res=0
audit: type=1804 audit(1674558385.520:4): pid=10185 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir2857344839/syzkaller.G2VK8k/27/bus/bus" dev="loop0" ino=21 res=1
audit: type=1800 audit(1674558385.520:5): pid=10185 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="loop0" ino=21 res=0
syz-executor.5 (10150): drop_caches: 1
syz-executor.5 (10150): drop_caches: 1
audit: type=1804 audit(1674558386.031:6): pid=10203 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir2857344839/syzkaller.G2VK8k/28/bus/bus" dev="loop0" ino=21 res=1
audit: type=1800 audit(1674558386.031:7): pid=10203 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="loop0" ino=21 res=0
audit: type=1804 audit(1674558386.211:8): pid=10222 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir2857344839/syzkaller.G2VK8k/29/bus/bus" dev="loop0" ino=21 res=1
audit: type=1800 audit(1674558386.241:9): pid=10222 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="loop0" ino=21 res=0
Zero length message leads to an empty skb
BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop0
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
syz-executor.5 (10208): drop_caches: 1
syz-executor.5 (10208): drop_caches: 1
tmpfs: Bad value 'interleave=static:9,4' for mount option 'mpol'
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS info (device loop0): enabling inode map caching
BTRFS warning (device loop0): excessive commit interval 622039222
BTRFS info (device loop0): force zlib compression
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS info (device loop5): enabling inode map caching
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS info (device loop5): force zlib compression
BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop5): enabling inode map caching
BTRFS warning (device loop5): excessive commit interval 622039222
BTRFS info (device loop5): force zlib compression
BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): has skinny extents
BTRFS info (device loop1): enabling inode map caching
BTRFS warning (device loop1): excessive commit interval 622039222
BTRFS info (device loop1): force zlib compression
BTRFS info (device loop1): using free space tree
BTRFS info (device loop1): has skinny extents