IPVS: ftp: loaded support on port[0] = 21 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9899 Comm: syz-executor075 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:strlen+0x1f/0xa0 lib/string.c:527 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:ffffc90002696e90 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: ffff8880957d7018 RCX: 1ffffffff14f6d16 RDX: 00000000000000c3 RSI: ffffffff8673a421 RDI: 0000000000000618 RBP: ffffc90002696ea8 R08: ffff888096df60c0 R09: ffffed1012afae03 R10: ffffed1012afae02 R11: ffff8880957d7017 R12: 0000000000000618 R13: 0000000000000608 R14: ffff8880a4f9dc00 R15: ffff8880957d7000 FS: 000000000085c880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005588eca91100 CR3: 00000000a7cab000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strlen include/linux/string.h:302 [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_net4_add+0x1b9a/0x2200 net/netfilter/ipset/ip_set_hash_gen.h:766 hash_net4_uadt+0x596/0x940 net/netfilter/ipset/ip_set_hash_net.c:195 call_ad+0x1a0/0x5a0 net/netfilter/ipset/ip_set_core.c:1716 ip_set_ad.isra.0+0x572/0xb20 net/netfilter/ipset/ip_set_core.c:1804 ip_set_uadd+0x37/0x50 net/netfilter/ipset/ip_set_core.c:1829 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441559 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd2f68d6a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441559 RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004 RBP: 00007ffd2f68d6d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000004 R14: 00007ffd2f68d700 R15: 0000000000000000 Modules linked in: ---[ end trace 803abee1a421cb4c ]--- RIP: 0010:strlen+0x1f/0xa0 lib/string.c:527 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:ffffc90002696e90 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: ffff8880957d7018 RCX: 1ffffffff14f6d16 RDX: 00000000000000c3 RSI: ffffffff8673a421 RDI: 0000000000000618 RBP: ffffc90002696ea8 R08: ffff888096df60c0 R09: ffffed1012afae03 R10: ffffed1012afae02 R11: ffff8880957d7017 R12: 0000000000000618 R13: 0000000000000608 R14: ffff8880a4f9dc00 R15: ffff8880957d7000 FS: 000000000085c880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005588eca91100 CR3: 00000000a7cab000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400