general protection fault, probably for non-canonical address 0xdffffc0000000022: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000110-0x0000000000000117] CPU: 1 PID: 26764 Comm: syz-executor.1 Not tainted 5.6.0-rc3-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:ffffc90007376e98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: ffff888000f15f18 RCX: ffffc900054fa000 RDX: 0000000000000022 RSI: ffffffff868d2c21 RDI: 0000000000000114 RBP: ffffc90007376eb0 R08: ffff8880a53b0100 R09: ffffed10001e2be3 R10: ffffed10001e2be2 R11: ffff888000f15f17 R12: 0000000000000114 R13: 0000000000000104 R14: ffff888000f15f10 R15: ffff88809fc1ec00 FS: 00007fcf36a8d700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000015cc978 CR3: 00000000a75ce000 CR4: 00000000001426e0 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:00007fcf36a8cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fcf36a8d6d4 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000091e R14: 00000000004cb7af R15: 000000000076bf2c Modules linked in: ---[ end trace 7c6d861bfeeb9d15 ]--- 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:ffffc90007376e98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: ffff888000f15f18 RCX: ffffc900054fa000 RDX: 0000000000000022 RSI: ffffffff868d2c21 RDI: 0000000000000114 RBP: ffffc90007376eb0 R08: ffff8880a53b0100 R09: ffffed10001e2be3 R10: ffffed10001e2be2 R11: ffff888000f15f17 R12: 0000000000000114 R13: 0000000000000104 R14: ffff888000f15f10 R15: ffff88809fc1ec00 FS: 00007fcf36a8d700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000015cc978 CR3: 00000000a75ce000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400