audit: type=1800 audit(1655729271.915:17): pid=10489 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14091 res=0
audit: type=1800 audit(1655729272.155:18): pid=10490 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=14093 res=0
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
Read of size 8 at addr ffff888093871620 by task syz-executor.5/10502

CPU: 0 PID: 10502 Comm: syz-executor.5 Not tainted 4.14.284-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_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:176
 spin_lock_bh include/linux/spinlock.h:322 [inline]
 lock_sock_nested+0x39/0x100 net/core/sock.c:2805
 lock_sock include/net/sock.h:1473 [inline]
 nr_accept+0x1a5/0x5c0 net/netrom/af_netrom.c:808
 SYSC_accept4 net/socket.c:1587 [inline]
 SyS_accept4+0x2dc/0x580 net/socket.c:1537
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t1timer_expiry+0x0/0x330 net/netrom/nr_timer.c:56
RIP: 0033:0x7efcbe58a109
RSP: 002b:00007efcbceff168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b
RAX: ffffffffffffffda RBX: 00007efcbe69cf60 RCX: 00007efcbe58a109
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007efcbe5e405d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff74a7b14f R14: 00007efcbceff300 R15: 0000000000022000

Allocated by task 10502:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 sk_prot_alloc+0x1ba/0x290 net/core/sock.c:1484
 sk_alloc+0x36/0xcd0 net/core/sock.c:1538
 nr_create+0x99/0x5c0 net/netrom/af_netrom.c:436
 __sock_create+0x303/0x620 net/socket.c:1275
 sock_create net/socket.c:1315 [inline]
 SYSC_socket net/socket.c:1345 [inline]
 SyS_socket+0xd1/0x1b0 net/socket.c:1325
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 17:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 sk_prot_free net/core/sock.c:1521 [inline]
 __sk_destruct+0x5e3/0x760 net/core/sock.c:1600
 sk_destruct net/core/sock.c:1615 [inline]
 __sk_free+0xd9/0x2d0 net/core/sock.c:1623
------------[ cut here ]------------
 sk_free+0x2b/0x40 net/core/sock.c:1634
WARNING: CPU: 1 PID: 10496 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
 sock_put include/net/sock.h:1664 [inline]
 nr_heartbeat_expiry+0x2ba/0x310 net/netrom/nr_timer.c:152
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280