netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'.
sctp: [Deprecated]: syz-executor.1 (pid 10658) Use of int in maxseg socket option.
Use struct sctp_assoc_value instead
======================================================
WARNING: possible circular locking dependency detected
4.14.264-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.2/10678 is trying to acquire lock:
("dio/%s"sb->s_id){+.+.}, at: [<ffffffff8135b5bb>] flush_workqueue+0xcb/0x1310 kernel/workqueue.c:2622
but task is already holding lock:
(&sb->s_type->i_mutex_key#22){++++}, at: [<ffffffff81691789>] inode_lock include/linux/fs.h:719 [inline]
(&sb->s_type->i_mutex_key#22){++++}, at: [<ffffffff81691789>] generic_file_write_iter+0x99/0x650 mm/filemap.c:3205
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sb->s_type->i_mutex_key#22){++++}:
down_write+0x34/0x90 kernel/locking/rwsem.c:54
inode_lock include/linux/fs.h:719 [inline]
__generic_file_fsync+0x9e/0x190 fs/libfs.c:989
fat_file_fsync+0x73/0x1f0 fs/fat/file.c:165
vfs_fsync_range+0x103/0x260 fs/sync.c:196
generic_write_sync include/linux/fs.h:2684 [inline]
dio_complete+0x561/0x8d0 fs/direct-io.c:330
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:404
-> #1 ((&dio->complete_work)){+.+.}:
process_one_work+0x736/0x14a0 kernel/workqueue.c:2093
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:404
-> #0 ("dio/%s"sb->s_id){+.+.}:
lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
flush_workqueue+0xfa/0x1310 kernel/workqueue.c:2625
drain_workqueue+0x177/0x3e0 kernel/workqueue.c:2790
destroy_workqueue+0x71/0x710 kernel/workqueue.c:4116
__alloc_workqueue_key+0xd50/0x1080 kernel/workqueue.c:4093
sb_init_dio_done_wq+0x34/0x80 fs/direct-io.c:624
do_blockdev_direct_IO fs/direct-io.c:1287 [inline]
__blockdev_direct_IO+0x3df1/0xdcb0 fs/direct-io.c:1423
blockdev_direct_IO include/linux/fs.h:2994 [inline]
fat_direct_IO+0x19b/0x320 fs/fat/inode.c:275
generic_file_direct_write+0x1df/0x420 mm/filemap.c:2958
__generic_file_write_iter+0x2a2/0x590 mm/filemap.c:3137
generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208
call_write_iter include/linux/fs.h:1780 [inline]
aio_write+0x2ed/0x560 fs/aio.c:1553
io_submit_one fs/aio.c:1641 [inline]
do_io_submit+0x847/0x1570 fs/aio.c:1709
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
other info that might help us debug this:
Chain exists of:
"dio/%s"sb->s_id --> (&dio->complete_work) --> &sb->s_type->i_mutex_key#22
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sb->s_type->i_mutex_key#22);
lock((&dio->complete_work));
lock(&sb->s_type->i_mutex_key#22);
lock("dio/%s"sb->s_id);
*** DEADLOCK ***
2 locks held by syz-executor.2/10678:
#0: (sb_writers#13){.+.+}, at: [<ffffffff81982708>] file_start_write include/linux/fs.h:2714 [inline]
#0: (sb_writers#13){.+.+}, at: [<ffffffff81982708>] aio_write+0x408/0x560 fs/aio.c:1552
#1: (&sb->s_type->i_mutex_key#22){++++}, at: [<ffffffff81691789>] inode_lock include/linux/fs.h:719 [inline]
#1: (&sb->s_type->i_mutex_key#22){++++}, at: [<ffffffff81691789>] generic_file_write_iter+0x99/0x650 mm/filemap.c:3205
stack backtrace:
CPU: 0 PID: 10678 Comm: syz-executor.2 Not tainted 4.14.264-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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
flush_workqueue+0xfa/0x1310 kernel/workqueue.c:2625
drain_workqueue+0x177/0x3e0 kernel/workqueue.c:2790
destroy_workqueue+0x71/0x710 kernel/workqueue.c:4116
__alloc_workqueue_key+0xd50/0x1080 kernel/workqueue.c:4093
sb_init_dio_done_wq+0x34/0x80 fs/direct-io.c:624
do_blockdev_direct_IO fs/direct-io.c:1287 [inline]
__blockdev_direct_IO+0x3df1/0xdcb0 fs/direct-io.c:1423
blockdev_direct_IO include/linux/fs.h:2994 [inline]
fat_direct_IO+0x19b/0x320 fs/fat/inode.c:275
generic_file_direct_write+0x1df/0x420 mm/filemap.c:2958
__generic_file_write_iter+0x2a2/0x590 mm/filemap.c:3137
generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208
call_write_iter include/linux/fs.h:1780 [inline]
aio_write+0x2ed/0x560 fs/aio.c:1553
io_submit_one fs/aio.c:1641 [inline]
do_io_submit+0x847/0x1570 fs/aio.c:1709
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7ffb5f96b059
RSP: 002b:00007ffb5e2bf168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007ffb5fa7e030 RCX: 00007ffb5f96b059
RDX: 0000000020000540 RSI: 0000000000001801 RDI: 00007ffb5fa59000
RBP: 00007ffb5f9c508d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef09d725f R14: 00007ffb5e2bf300 R15: 0000000000022000
audit: type=1800 audit(1643842255.630:6): pid=10845 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=13928 res=0
FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
audit: type=1800 audit(1643842255.730:7): pid=10860 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=13931 res=0
audit: type=1804 audit(1643842255.820:8): pid=10874 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir484975931/syzkaller.UXGTzb/28/file0" dev="sda1" ino=13997 res=1
audit: type=1800 audit(1643842255.880:9): pid=10902 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=13935 res=0
audit: type=1804 audit(1643842255.890:10): pid=10910 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir484975931/syzkaller.UXGTzb/29/file0" dev="sda1" ino=13997 res=1
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
FAT-fs (loop5): bogus number of reserved sectors
FAT-fs (loop5): Can't find a valid FAT filesystem
kvm: emulating exchange as write
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
audit: type=1800 audit(1643842257.190:11): pid=11154 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14003 res=0
audit: type=1800 audit(1643842257.190:12): pid=11154 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14003 res=0
audit: type=1800 audit(1643842257.350:13): pid=11163 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=13910 res=0
audit: type=1800 audit(1643842257.350:14): pid=11163 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=13910 res=0
print_req_error: 41 callbacks suppressed
print_req_error: I/O error, dev loop5, sector 0
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
audit: type=1800 audit(1643842259.650:15): pid=11185 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14021 res=0
print_req_error: I/O error, dev loop5, sector 0
netlink: 32 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 80 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'.
print_req_error: I/O error, dev loop5, sector 0