syzbot

audit: type=1400 audit(1520528703.206:7): avc:  denied  { map } for  pid=4219 comm="syzkaller072406" path="/root/syzkaller072406011" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
IPVS: ftp: loaded support on port[0] = 21
BUG: unable to handle kernel paging request at ffffc900017df5c5
IP: poolsize_invalid net/bridge/netfilter/ebt_among.c:177 [inline]
IP: ebt_among_mt_check+0x1f8/0x390 net/bridge/netfilter/ebt_among.c:193
PGD 1dad2f067 P4D 1dad2f067 PUD 1dad30067 PMD 1cf4e3067 PTE 0
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4220 Comm: syzkaller072406 Not tainted 4.16.0-rc4+ #346
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:poolsize_invalid net/bridge/netfilter/ebt_among.c:177 [inline]
RIP: 0010:ebt_among_mt_check+0x1f8/0x390 net/bridge/netfilter/ebt_among.c:193
RSP: 0018:ffff8801cbfa7198 EFLAGS: 00010246
RAX: 0000000000000008 RBX: ffffc900017d71c0 RCX: ffffffff851bb706
RDX: 0000000000000000 RSI: 00000000000008f8 RDI: ffffc900017df5c5
RBP: ffff8801cbfa71d0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88613380 R11: 0000000000000000 R12: ffffc900017df1c1
R13: ffffffff851bb540 R14: 00000000000008f8 R15: ffffffff87701080
FS:  00000000007da880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900017df5c5 CR3: 00000001b3790004 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 xt_check_match+0x235/0x9c0 net/netfilter/x_tables.c:469
 ebt_check_match net/bridge/netfilter/ebtables.c:374 [inline]
 ebt_check_entry+0xbc3/0x1e00 net/bridge/netfilter/ebtables.c:704
 translate_table+0xcf5/0x2290 net/bridge/netfilter/ebtables.c:945
 do_replace_finish+0x79a/0x2620 net/bridge/netfilter/ebtables.c:1002
 do_replace+0x333/0x4b0 net/bridge/netfilter/ebtables.c:1141
 do_ebt_set_ctl+0xd4/0x110 net/bridge/netfilter/ebtables.c:1518
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1259
 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2406
 ipv6_setsockopt+0xa0/0x130 net/ipv6/ipv6_sockglue.c:917
 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x442499
RSP: 002b:00007ffe1db7ed08 EFLAGS: 00000213 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442499
RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000006cd018 R08: 0000000000000c10 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000213 R12: 0000000000403920
R13: 00000000004039b0 R14: 0000000000000000 R15: 0000000000000000
Code: 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 01 00 00 <45> 8b ac 24 04 04 00 00 41 81 fd a9 aa aa 0a 77 8f e8 c2 4e 55 
RIP: poolsize_invalid net/bridge/netfilter/ebt_among.c:177 [inline] RSP: ffff8801cbfa7198
RIP: ebt_among_mt_check+0x1f8/0x390 net/bridge/netfilter/ebt_among.c:193 RSP: ffff8801cbfa7198
CR2: ffffc900017df5c5
---[ end trace 41c76f0aeaefd3e1 ]---