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KMSAN: uninit-value in bond_start_xmit (2)

Status: fixed on 2019/08/05 13:45
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+e5be16aa39ad6e755391@syzkaller.appspotmail.com
Fix commit: 9d1bc24b52fb bonding: validate ip header before check IPPROTO_IGMP
First crash: 2251d, last: 1922d
▶ ▼ Discussions (13)
Title Replies (including bot) Last reply
[PATCH 3.16 00/47] 3.16.76-rc1 review 57 (57) 2019/11/02 07:39
[PATCH 4.9 000/223] 4.9.187-stable review 231 (231) 2019/08/28 03:02
[PATCH 5.2 000/413] 5.2.3-stable review 444 (444) 2019/08/05 12:40
[PATCH 4.4 000/158] 4.4.187-stable review 166 (166) 2019/08/03 15:57
[PATCH 4.14 000/293] 4.14.135-stable review 302 (302) 2019/07/31 09:35
[PATCH 4.19 000/271] 4.19.61-stable review 284 (284) 2019/07/27 10:51
[PATCH AUTOSEL 4.19 001/158] wil6210: fix potential out-of-bounds read 161 (161) 2019/07/26 18:07
[PATCH 5.1 000/371] 5.1.20-stable review 384 (384) 2019/07/26 12:24
[PATCH AUTOSEL 5.2 001/249] ath10k: Check tx_stats before use it 267 (267) 2019/07/24 03:35
[PATCH AUTOSEL 5.1 001/219] ath10k: Check tx_stats before use it 219 (219) 2019/07/15 14:03
[Patch net] bonding: validate ip header before check IPPROTO_IGMP 2 (2) 2019/07/03 20:26
Reminder: 94 open syzbot bugs in net subsystem 1 (1) 2019/06/25 05:48
KMSAN: uninit-value in bond_start_xmit (2) 0 (1) 2018/09/15 12:53
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in bond_start_xmit net C 697 2251d 2305d 0/28 closed as invalid on 2018/09/10 09:40
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2019/07/01 23:35 17m xiyou.wangcong@gmail.com patch https://github.com/google/kmsan.git master OK

Sample crash report:
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
==================================================================
BUG: KMSAN: uninit-value in bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline]
BUG: KMSAN: uninit-value in __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline]
BUG: KMSAN: uninit-value in bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170
CPU: 0 PID: 4319 Comm: syz-executor658 Not tainted 4.19.0-rc3+ #44
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+0x14b/0x190 lib/dump_stack.c:113
 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline]
 __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline]
 bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170
 __netdev_start_xmit include/linux/netdevice.h:4287 [inline]
 netdev_start_xmit include/linux/netdevice.h:4296 [inline]
 xmit_one net/core/dev.c:3216 [inline]
 dev_hard_start_xmit+0x5df/0xc20 net/core/dev.c:3232
 __dev_queue_xmit+0x2f35/0x3ab0 net/core/dev.c:3802
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3835
 packet_snd net/packet/af_packet.c:2925 [inline]
 packet_sendmsg+0x80ff/0x8c60 net/packet/af_packet.c:2950
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
 __sys_sendmsg net/socket.c:2152 [inline]
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x4410f9
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 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffcc15c2468 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004410f9
RDX: 0000000000000000 RSI: 0000000020001940 RDI: 0000000000000004
RBP: 00000000006cc018 R08: 0000000000000100 R09: 0000000000000100
R10: 0000000000000100 R11: 0000000000000217 R12: 0000000000402060
R13: 00000000004020f0 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2718 [inline]
 __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4351
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:996 [inline]
 alloc_skb_with_frags+0x1d0/0xac0 net/core/skbuff.c:5276
 sock_alloc_send_pskb+0xb47/0x1170 net/core/sock.c:2082
 packet_alloc_skb net/packet/af_packet.c:2779 [inline]
 packet_snd net/packet/af_packet.c:2870 [inline]
 packet_sendmsg+0x6599/0x8c60 net/packet/af_packet.c:2950
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg net/socket.c:631 [inline]
 ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
 __sys_sendmsg net/socket.c:2152 [inline]
 __do_sys_sendmsg net/socket.c:2161 [inline]
 __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
==================================================================

Crashes (2309):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/11 12:06 https://github.com/google/kmsan.git master 401f0ab26c43 8c88323f .config console log report syz C ci-upstream-kmsan-gce
2019/08/05 12:47 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/05 04:29 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 21:34 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 17:22 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 12:57 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 04:10 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 00:58 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/04 00:35 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 17:28 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 13:18 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 11:37 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 06:21 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 05:10 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 04:00 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/03 02:40 https://github.com/google/kmsan.git master beaab8a31e0d 6affd8e8 .config console log report ci-upstream-kmsan-gce
2019/08/02 16:19 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/02 06:32 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/02 05:29 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/02 02:41 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/01 22:01 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/01 20:54 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/01 19:34 https://github.com/google/kmsan.git master beaab8a31e0d 835dffe7 .config console log report ci-upstream-kmsan-gce
2019/08/01 06:43 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/08/01 04:26 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/08/01 02:08 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/07/31 22:07 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/07/31 20:32 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/07/31 16:47 https://github.com/google/kmsan.git master beaab8a31e0d c692b5bd .config console log report ci-upstream-kmsan-gce
2019/07/31 09:05 https://github.com/google/kmsan.git master beaab8a31e0d 7c7ded69 .config console log report ci-upstream-kmsan-gce
2019/07/31 07:32 https://github.com/google/kmsan.git master beaab8a31e0d 7c7ded69 .config console log report ci-upstream-kmsan-gce
2019/07/31 06:08 https://github.com/google/kmsan.git master beaab8a31e0d 7c7ded69 .config console log report ci-upstream-kmsan-gce
2019/07/31 04:03 https://github.com/google/kmsan.git master beaab8a31e0d 7c7ded69 .config console log report ci-upstream-kmsan-gce
2019/07/31 02:26 https://github.com/google/kmsan.git master beaab8a31e0d 7c7ded69 .config console log report ci-upstream-kmsan-gce
2019/07/30 06:23 https://github.com/google/kmsan.git master beaab8a31e0d f67095ee .config console log report ci-upstream-kmsan-gce
2019/07/30 00:20 https://github.com/google/kmsan.git master beaab8a31e0d f67095ee .config console log report ci-upstream-kmsan-gce
2019/07/29 13:19 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/29 10:37 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/28 17:46 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/28 06:33 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/28 02:52 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/28 01:16 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/27 23:41 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/27 14:22 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/27 13:18 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/27 10:44 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config console log report ci-upstream-kmsan-gce
2019/07/26 16:54 https://github.com/google/kmsan.git master beaab8a31e0d 3e5d1beb .config console log report ci-upstream-kmsan-gce
2019/07/26 13:44 https://github.com/google/kmsan.git master beaab8a31e0d 3e5d1beb .config console log report ci-upstream-kmsan-gce
2018/09/10 20:59 https://github.com/google/kmsan.git master 915c18a6ce9b f167cb6b .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.