KMSAN: uninit-value in hash_ip6_del

Status: auto-closed as invalid on 2021/01/27 16:05
Subsystems: netfilter
[Documentation on labels]
Reported-by: syzbot+81b3ea575b0ab527b8b4@syzkaller.appspotmail.com
First crash: 2255d, last: 2148d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
KMSAN: uninit-value in hash_ip6_del 0 (1) 2020/06/15 16:34

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in hash_ip6_del+0xa7d/0x2110 net/netfilter/ipset/ip_set_hash_gen.h:1069
CPU: 1 PID: 755 Comm: syz-executor.3 Not tainted 5.9.0-rc4-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+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219
 hash_ip6_del+0xa7d/0x2110 net/netfilter/ipset/ip_set_hash_gen.h:1069
 hash_ip6_uadt+0x976/0xbd0 net/netfilter/ipset/ip_set_hash_ip.c:267
 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734
 ip_set_ad+0xd68/0x1400 net/netfilter/ipset/ip_set_core.c:1833
 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856
 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:235
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470
 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:569
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0xc82/0x1240 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x6d1/0x820 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5f9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb51b0d7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000000296c0 RCX: 000000000045d5f9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007fb51b0d89c0 R15: 000000000118cf4c

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:311
 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:169
 ip6_netmask include/linux/netfilter/ipset/pfxlen.h:49 [inline]
 hash_ip6_netmask net/netfilter/ipset/ip_set_hash_ip.c:185 [inline]
 hash_ip6_uadt+0xb16/0xbd0 net/netfilter/ipset/ip_set_hash_ip.c:263
 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734
 ip_set_ad+0xd68/0x1400 net/netfilter/ipset/ip_set_core.c:1833
 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856
 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:235
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470
 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:569
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0xc82/0x1240 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x6d1/0x820 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:311
 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:248
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:268
 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:120
 ip_set_get_ipaddr6+0x2cb/0x370 net/netfilter/ipset/ip_set_core.c:325
 hash_ip6_uadt+0x439/0xbd0 net/netfilter/ipset/ip_set_hash_ip.c:255
 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734
 ip_set_ad+0xd68/0x1400 net/netfilter/ipset/ip_set_core.c:1833
 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856
 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:235
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470
 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:569
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0xc82/0x1240 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x6d1/0x820 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline]
 kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:126
 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0x9aa/0x12f0 mm/slub.c:4511
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x35f/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1094 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1176 [inline]
 netlink_sendmsg+0xdb9/0x1840 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0xc82/0x1240 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x6d1/0x820 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================

Crashes (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/09/20 23:28 https://github.com/google/kmsan.git master c5a13b33ec11 9564d2e9 .config console log report info ci-upstream-kmsan-gce
2020/09/09 10:28 https://github.com/google/kmsan.git master 3b3ea6028136 0ea7a887 .config console log report ci-upstream-kmsan-gce
2020/07/29 05:55 https://github.com/google/kmsan.git master 93f54a72361a cb93dc6a .config console log report ci-upstream-kmsan-gce
2020/07/24 22:14 https://github.com/google/kmsan.git master 93f54a72361a 554af388 .config console log report ci-upstream-kmsan-gce
2020/07/24 03:09 https://github.com/google/kmsan.git master 93f54a72361a 70c104a1 .config console log report ci-upstream-kmsan-gce
2020/09/29 16:04 https://github.com/google/kmsan.git master 5edb1df295b9 1b88c6d5 .config console log report info ci-upstream-kmsan-gce-386
2020/09/22 03:13 https://github.com/google/kmsan.git master c5a13b33ec11 9e1fa68e .config console log report info ci-upstream-kmsan-gce-386
2020/08/22 23:19 https://github.com/google/kmsan.git master ce8056d1f79e 1da71ab0 .config console log report ci-upstream-kmsan-gce-386
2020/08/04 15:40 https://github.com/google/kmsan.git master 93f54a72361a 80a06902 .config console log report ci-upstream-kmsan-gce-386
2020/06/14 18:20 https://github.com/google/kmsan.git master f0d5ec902b23 2a22c77a .config console log report ci-upstream-kmsan-gce-386
* Struck through repros no longer work on HEAD.