netlink: 1996 bytes leftover after parsing attributes in process `syz-executor576'.
sch_tbf: burst 549 is lower than device lo mtu (65550) !
==================================================================
BUG: KASAN: slab-out-of-bounds in __tcp_hdrlen include/linux/tcp.h:31 [inline]
BUG: KASAN: slab-out-of-bounds in tcp_hdrlen include/linux/tcp.h:36 [inline]
BUG: KASAN: slab-out-of-bounds in skb_gso_transport_seglen+0x344/0x360 net/core/skbuff.c:5266
Read of size 2 at addr ffff8880a6d1765c by task syz-executor576/7127

CPU: 0 PID: 7127 Comm: syz-executor576 Not tainted 5.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:382
 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511
 kasan_report+0x33/0x50 mm/kasan/common.c:625
 __tcp_hdrlen include/linux/tcp.h:31 [inline]
 tcp_hdrlen include/linux/tcp.h:36 [inline]
 skb_gso_transport_seglen+0x344/0x360 net/core/skbuff.c:5266
 skb_gso_mac_seglen net/core/skbuff.c:5310 [inline]
 skb_gso_validate_mac_len+0x85/0x290 net/core/skbuff.c:5381
 tbf_enqueue+0x1f2/0x990 net/sched/sch_tbf.c:233
 __dev_xmit_skb net/core/dev.c:3710 [inline]
 __dev_queue_xmit+0x154a/0x30a0 net/core/dev.c:4021
 packet_snd net/packet/af_packet.c:2979 [inline]
 packet_sendmsg+0x23cc/0x5ce0 net/packet/af_packet.c:3004
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 __sys_sendto+0x220/0x330 net/socket.c:2000
 __do_sys_sendto net/socket.c:2012 [inline]
 __se_sys_sendto net/socket.c:2008 [inline]
 __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2008
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Allocated by task 7127:
 save_stack+0x1b/0x40 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc mm/kasan/common.c:495 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468
 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:142
 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1083 [inline]
 alloc_skb_with_frags+0x92/0x560 net/core/skbuff.c:5772
 sock_alloc_send_pskb+0x734/0x890 net/core/sock.c:2265
 packet_alloc_skb net/packet/af_packet.c:2827 [inline]
 packet_snd net/packet/af_packet.c:2922 [inline]
 packet_sendmsg+0x1947/0x5ce0 net/packet/af_packet.c:3004
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 __sys_sendto+0x220/0x330 net/socket.c:2000
 __do_sys_sendto net/socket.c:2012 [inline]
 __se_sys_sendto net/socket.c:2008 [inline]
 __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2008
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 6967:
 save_stack+0x1b/0x40 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 kasan_set_free_info mm/kasan/common.c:317 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:456
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 tomoyo_supervisor+0x34d/0xee0 security/tomoyo/common.c:2149
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x257/0x360 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x336/0x370 security/tomoyo/file.c:777
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:314
 security_file_open+0x6e/0x410 security/security.c:1548
 do_dentry_open+0x358/0x1290 fs/open.c:784
 do_open fs/namei.c:3229 [inline]
 path_openat+0x1e59/0x27d0 fs/namei.c:3346
 do_filp_open+0x192/0x260 fs/namei.c:3373
 do_sys_openat2+0x585/0x7d0 fs/open.c:1148
 do_sys_open+0xc3/0x140 fs/open.c:1164
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

The buggy address belongs to the object at ffff8880a6d17400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 92 bytes to the right of
 512-byte region [ffff8880a6d17400, ffff8880a6d17600)
The buggy address belongs to the page:
page:ffffea00029b45c0 refcount:1 mapcount:0 mapping:00000000bdc4e33c index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00028c6ac8 ffffea00028dca48 ffff8880aa000a80
raw: 0000000000000000 ffff8880a6d17000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a6d17500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a6d17580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a6d17600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                    ^
 ffff8880a6d17680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880a6d17700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================