netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
audit: type=1804 audit(1662385484.934:5): pid=9575 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir2195732166/syzkaller.RLnO2I/6/file0" dev="sda1" ino=13878 res=1
==================================================================
BUG: KASAN: use-after-free in tcindex_dump+0xbea/0xbf0 net/sched/cls_tcindex.c:637
Read of size 8 at addr ffff888058af09e0 by task syz-executor.5/9566

CPU: 1 PID: 9566 Comm: syz-executor.5 Not tainted 4.14.292-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
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
 tcindex_dump+0xbea/0xbf0 net/sched/cls_tcindex.c:637
 tcf_fill_node+0x529/0x810 net/sched/cls_api.c:453
 tfilter_notify+0x11c/0x240 net/sched/cls_api.c:476
 tc_ctl_tfilter+0x11af/0x1c10 net/sched/cls_api.c:743
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322
 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x326/0x800 net/socket.c:2062
 __sys_sendmmsg+0x129/0x330 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x2f/0x50 net/socket.c:2178
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f0c359b6279
RSP: 002b:00007f0c3432b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f0c35ac8f80 RCX: 00007f0c359b6279
RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007f0c35a102e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe42e306f R14: 00007f0c3432b300 R15: 0000000000022000

Allocated by task 9566:
 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_array include/linux/slab.h:607 [inline]
 kcalloc include/linux/slab.h:618 [inline]
 tcindex_alloc_perfect_hash+0x53/0x3c0 net/sched/cls_tcindex.c:299
 tcindex_set_parms+0x13fd/0x17c0 net/sched/cls_tcindex.c:428
 tcindex_change+0x1c1/0x2c0 net/sched/cls_tcindex.c:539
 tc_ctl_tfilter+0xb54/0x1c10 net/sched/cls_api.c:738
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322
 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x326/0x800 net/socket.c:2062
 __sys_sendmmsg+0x129/0x330 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x2f/0x50 net/socket.c:2178
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 1941:
 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
 __tcindex_partial_destroy+0x2e/0x50 net/sched/cls_tcindex.c:282
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2699 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288

The buggy address belongs to the object at ffff888058af09c0
 which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 32 bytes inside of
 8192-byte region [ffff888058af09c0, ffff888058af29c0)
The buggy address belongs to the page:
page:ffffea000162bc00 count:1 mapcount:0 mapping:ffff888058af09c0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff888058af09c0 0000000000000000 0000000100000001
raw: ffffea000162bb20 ffffea000162bd20 ffff88813fe65080 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888058af0880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888058af0900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888058af0980: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                                       ^
 ffff888058af0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888058af0a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================