general protection fault, probably for non-canonical address 0xdffffc0000000062: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000310-0x0000000000000317]
CPU: 1 PID: 13408 Comm: syz-executor.2 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:strlen+0x1f/0xa0 lib/string.c:544
Code: 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24
RSP: 0018:ffffc900057dee98 EFLAGS: 00010292
RAX: dffffc0000000000 RBX: ffff88809bd93518 RCX: ffffc9000ceb1000
RDX: 0000000000000062 RSI: ffffffff868cdc71 RDI: 0000000000000314
RBP: ffffc900057deeb0 R08: ffff8880297b85c0 R09: ffffed10137b26a3
R10: ffffed10137b26a2 R11: ffff88809bd93517 R12: 0000000000000314
R13: 0000000000000304 R14: ffff88809bd93510 R15: ffff888090982100
FS:  00007f1522795700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38fd234000 CR3: 000000005b131000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 strlen include/linux/string.h:303 [inline]
 ip_set_comment_free+0x69/0xe0 net/netfilter/ipset/ip_set_core.c:402
 ip_set_ext_destroy include/linux/netfilter/ipset/ip_set.h:275 [inline]
 ip_set_ext_destroy include/linux/netfilter/ipset/ip_set.h:267 [inline]
 hash_ip4_add+0x166c/0x1b6c net/netfilter/ipset/ip_set_hash_gen.h:766
 hash_ip4_uadt+0x546/0x7a0 net/netfilter/ipset/ip_set_hash_ip.c:151
 call_ad+0x1a0/0x5a0 net/netfilter/ipset/ip_set_core.c:1717
 ip_set_ad.isra.0+0x572/0xb20 net/netfilter/ipset/ip_set_core.c:1805
 ip_set_uadd+0x37/0x50 net/netfilter/ipset/ip_set_core.c:1830
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2478
 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:672
 ____sys_sendmsg+0x753/0x880 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c479
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1522794c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f15227956d4 RCX: 000000000045c479
RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000091e R14: 00000000004cb7af R15: 000000000076bf2c
Modules linked in:
---[ end trace 53d2dd6381f7f1f2 ]---
RIP: 0010:strlen+0x1f/0xa0 lib/string.c:544
Code: 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24
RSP: 0018:ffffc900057dee98 EFLAGS: 00010292
RAX: dffffc0000000000 RBX: ffff88809bd93518 RCX: ffffc9000ceb1000
RDX: 0000000000000062 RSI: ffffffff868cdc71 RDI: 0000000000000314
RBP: ffffc900057deeb0 R08: ffff8880297b85c0 R09: ffffed10137b26a3
R10: ffffed10137b26a2 R11: ffff88809bd93517 R12: 0000000000000314
R13: 0000000000000304 R14: ffff88809bd93510 R15: ffff888090982100
FS:  00007f1522795700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38fd234000 CR3: 000000005b131000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400