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KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit

Status: auto-closed as invalid on 2020/07/07 06:22
Subsystems: net
[Documentation on labels]
First crash: 1640d, last: 1417d
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit (4) net 2 771d 774d 0/26 auto-closed as invalid on 2022/04/13 23:14
upstream KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit (2) net 3 1339d 1381d 0/26 auto-closed as invalid on 2020/09/23 05:35
upstream KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit (5) net 1 649d 649d 0/26 auto-closed as invalid on 2022/08/14 03:33
upstream KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit (3) net 1 837d 837d 0/26 auto-closed as invalid on 2022/02/07 05:08

Sample crash report:
==================================================================
BUG: KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit

write to 0xffff8880a02ed130 of 8 bytes by task 28277 on cpu 0:
 ipip_tunnel_xmit+0x27f/0x300 net/ipv4/ipip.c:311
 __netdev_start_xmit include/linux/netdevice.h:4533 [inline]
 netdev_start_xmit include/linux/netdevice.h:4547 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0xeb/0x420 net/core/dev.c:3493
 __dev_queue_xmit+0x11f7/0x1810 net/core/dev.c:4052
 dev_queue_xmit+0x1e/0x30 net/core/dev.c:4085
 neigh_direct_output+0x1c/0x30 net/core/neighbour.c:1529
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x717/0xf60 net/ipv6/ip6_output.c:117
 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline]
 __ip6_finish_output+0x2cb/0x320 net/ipv6/ip6_output.c:128
 ip6_finish_output+0x3e/0x160 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x104/0x2a0 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:435 [inline]
 ip6_local_out+0x70/0x90 net/ipv6/output_core.c:179
 ip6_send_skb+0x4f/0x110 net/ipv6/ip6_output.c:1865
 udp_v6_send_skb.isra.0+0x3f9/0xa80 net/ipv6/udp.c:1175
 udpv6_sendmsg+0x19e1/0x1d40 net/ipv6/udp.c:1473
 inet6_sendmsg+0x69/0x90 net/ipv6/af_inet6.c:577
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x98/0xc0 net/socket.c:672
 ____sys_sendmsg+0x207/0x4c0 net/socket.c:2362
 ___sys_sendmsg+0xb5/0x100 net/socket.c:2416
 __sys_sendmmsg+0x10e/0x310 net/socket.c:2506
 __do_sys_sendmmsg net/socket.c:2535 [inline]
 __se_sys_sendmmsg net/socket.c:2532 [inline]
 __x64_sys_sendmmsg+0x60/0x80 net/socket.c:2532
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880a02ed130 of 8 bytes by task 28275 on cpu 1:
 ipip_tunnel_xmit+0x26b/0x300 net/ipv4/ipip.c:311
 __netdev_start_xmit include/linux/netdevice.h:4533 [inline]
 netdev_start_xmit include/linux/netdevice.h:4547 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0xeb/0x420 net/core/dev.c:3493
 __dev_queue_xmit+0x11f7/0x1810 net/core/dev.c:4052
 dev_queue_xmit+0x1e/0x30 net/core/dev.c:4085
 neigh_direct_output+0x1c/0x30 net/core/neighbour.c:1529
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x717/0xf60 net/ipv6/ip6_output.c:117
 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline]
 __ip6_finish_output+0x2cb/0x320 net/ipv6/ip6_output.c:128
 ip6_finish_output+0x3e/0x160 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x104/0x2a0 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:435 [inline]
 ip6_local_out+0x70/0x90 net/ipv6/output_core.c:179
 ip6_send_skb+0x4f/0x110 net/ipv6/ip6_output.c:1865
 udp_v6_send_skb.isra.0+0x3f9/0xa80 net/ipv6/udp.c:1175
 udpv6_sendmsg+0x19e1/0x1d40 net/ipv6/udp.c:1473
 inet6_sendmsg+0x69/0x90 net/ipv6/af_inet6.c:577
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x98/0xc0 net/socket.c:672
 ____sys_sendmsg+0x207/0x4c0 net/socket.c:2362
 ___sys_sendmsg+0xb5/0x100 net/socket.c:2416
 __sys_sendmmsg+0x10e/0x310 net/socket.c:2506
 __do_sys_sendmmsg net/socket.c:2535 [inline]
 __se_sys_sendmmsg net/socket.c:2532 [inline]
 __x64_sys_sendmmsg+0x60/0x80 net/socket.c:2532
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28275 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (36):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/06/02 06:18 https://github.com/google/ktsan.git kcsan 7c3cd68e5d38 a0331e89 .config console log report ci2-upstream-kcsan-gce
2020/05/30 00:57 https://github.com/google/ktsan.git kcsan 7c3cd68e5d38 bed08304 .config console log report ci2-upstream-kcsan-gce
2020/05/02 01:23 https://github.com/google/ktsan.git kcsan 7c3cd68e5d38 bc734e7a .config console log report ci2-upstream-kcsan-gce
2020/03/21 04:53 https://github.com/google/ktsan.git kcsan 40959e34d670 2c31c529 .config console log report ci2-upstream-kcsan-gce
2020/03/01 06:58 https://github.com/google/ktsan.git kcsan 766d004d1b85 c88c7b75 .config console log report ci2-upstream-kcsan-gce
2020/02/13 21:34 https://github.com/google/ktsan.git kcsan 55121bc1808a e6247653 .config console log report ci2-upstream-kcsan-gce
2020/01/30 11:27 https://github.com/google/ktsan.git kcsan 245a43005292 5ed23f9a .config console log report ci2-upstream-kcsan-gce
2020/01/22 09:49 https://github.com/google/ktsan.git kcsan 245a43005292 8eda0b95 .config console log report ci2-upstream-kcsan-gce
2020/01/14 14:30 https://github.com/google/ktsan.git kcsan 245a43005292 32881205 .config console log report ci2-upstream-kcsan-gce
2020/01/02 05:44 https://github.com/google/ktsan.git kcsan 245a43005292 25a0186e .config console log report ci2-upstream-kcsan-gce
2019/12/25 23:57 https://github.com/google/ktsan.git kcsan 245a43005292 be5c2c81 .config console log report ci2-upstream-kcsan-gce
2019/12/23 03:00 https://github.com/google/ktsan.git kcsan 245a43005292 8b967267 .config console log report ci2-upstream-kcsan-gce
2019/12/09 14:57 https://github.com/google/ktsan.git kcsan ef798c30ba4e b31eda3d .config console log report ci2-upstream-kcsan-gce
2019/12/08 20:21 https://github.com/google/ktsan.git kcsan ef798c30ba4e 1508f453 .config console log report ci2-upstream-kcsan-gce
2019/12/07 05:10 https://github.com/google/ktsan.git kcsan ef798c30ba4e 85f26751 .config console log report ci2-upstream-kcsan-gce
2019/12/04 18:26 https://github.com/google/ktsan.git kcsan ef798c30ba4e b2088328 .config console log report ci2-upstream-kcsan-gce
2019/12/04 06:16 https://github.com/google/ktsan.git kcsan ef798c30ba4e 0ecb9746 .config console log report ci2-upstream-kcsan-gce
2019/12/03 05:59 https://github.com/google/ktsan.git kcsan ef798c30ba4e ab342da3 .config console log report ci2-upstream-kcsan-gce
2019/11/27 13:58 https://github.com/google/ktsan.git kcsan ef798c30ba4e 1048481f .config console log report ci2-upstream-kcsan-gce
2019/11/20 11:04 https://github.com/google/ktsan.git kcsan 5863cc791e4c 432c7650 .config console log report ci2-upstream-kcsan-gce
2019/11/19 03:23 https://github.com/google/ktsan.git kcsan 5863cc791e4c d5696d51 .config console log report ci2-upstream-kcsan-gce
2019/11/16 21:44 https://github.com/google/ktsan.git kcsan 5863cc791e4c cdac920b .config console log report ci2-upstream-kcsan-gce
2019/11/14 04:06 https://github.com/google/ktsan.git kcsan 7f2955e0d056 048f2d49 .config console log report ci2-upstream-kcsan-gce
2019/11/12 04:54 https://github.com/google/ktsan.git kcsan 94c006602e13 377d77fa .config console log report ci2-upstream-kcsan-gce
2019/11/08 19:03 https://github.com/google/ktsan.git kcsan 94c006602e13 1e35461e .config console log report ci2-upstream-kcsan-gce
2019/11/06 22:05 https://github.com/google/ktsan.git kcsan 94c006602e13 da505f84 .config console log report ci2-upstream-kcsan-gce
2019/11/06 13:53 https://github.com/google/ktsan.git kcsan 94c006602e13 bc2c6e45 .config console log report ci2-upstream-kcsan-gce
2019/11/02 22:36 https://github.com/google/ktsan.git kcsan 05f2236801fe d603afc9 .config console log report ci2-upstream-kcsan-gce
2019/10/28 17:15 https://github.com/google/ktsan.git kcsan 05f2236801fe 439d7b14 .config console log report ci2-upstream-kcsan-gce
2019/10/26 16:18 https://github.com/google/ktsan.git kcsan 05f2236801fe 25bb509e .config console log report ci2-upstream-kcsan-gce
2019/10/26 05:13 https://github.com/google/ktsan.git kcsan 05f2236801fe 413926c5 .config console log report ci2-upstream-kcsan-gce
2019/10/26 05:12 https://github.com/google/ktsan.git kcsan 05f2236801fe 413926c5 .config console log report ci2-upstream-kcsan-gce
2019/10/25 13:35 https://github.com/google/ktsan.git kcsan 05f2236801fe 04ca72cd .config console log report ci2-upstream-kcsan-gce
2019/10/24 09:45 https://github.com/google/ktsan.git kcsan 05f2236801fe d01bb02a .config console log report ci2-upstream-kcsan-gce
2019/10/23 19:19 https://github.com/google/ktsan.git kcsan 05f2236801fe b602d64b .config console log report ci2-upstream-kcsan-gce
2019/10/23 05:12 https://github.com/google/ktsan.git kcsan 05f2236801fe d0686497 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.