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================================================================== BUG: KCSAN: data-race in tcp_add_backlog / tcp_try_rmem_schedule read to 0xffff88812643a14c of 4 bytes by interrupt on cpu 1: tcp_add_backlog+0x43/0xcc0 net/ipv4/tcp_ipv4.c:1628 tcp_v4_rcv+0x1aba/0x1bf0 net/ipv4/tcp_ipv4.c:1925 ip_protocol_deliver_rcu+0x51/0x470 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0x121/0x160 net/ipv4/ip_input.c:413 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_rcv+0x18f/0x1a0 net/ipv4/ip_input.c:523 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:5004 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5118 netif_receive_skb_internal+0x59/0x190 net/core/dev.c:5208 napi_skb_finish net/core/dev.c:5671 [inline] napi_gro_receive+0x28f/0x330 net/core/dev.c:5704 receive_buf+0x284/0x30b0 drivers/net/virtio_net.c:1061 virtnet_receive drivers/net/virtio_net.c:1323 [inline] virtnet_poll+0x436/0x7d0 drivers/net/virtio_net.c:1428 napi_poll net/core/dev.c:6352 [inline] net_rx_action+0x3ae/0xa50 net/core/dev.c:6418 write to 0xffff88812643a14c of 4 bytes by task 7268 on cpu 0: tcp_clamp_window net/ipv4/tcp_input.c:486 [inline] tcp_prune_queue net/ipv4/tcp_input.c:5074 [inline] tcp_try_rmem_schedule+0x294/0xb90 net/ipv4/tcp_input.c:4484 tcp_data_queue+0x7ba/0x2000 net/ipv4/tcp_input.c:4740 tcp_rcv_established+0x517/0xf50 net/ipv4/tcp_input.c:5661 tcp_v4_do_rcv+0x381/0x4e0 net/ipv4/tcp_ipv4.c:1542 sk_backlog_rcv include/net/sock.h:945 [inline] __release_sock+0x135/0x1e0 net/core/sock.c:2427 release_sock+0x61/0x160 net/core/sock.c:2943 tcp_recvmsg+0x63b/0x1a30 net/ipv4/tcp.c:2181 inet_recvmsg+0xbb/0x250 net/ipv4/af_inet.c:838 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg net/socket.c:889 [inline] sock_recvmsg+0x92/0xb0 net/socket.c:885 sock_read_iter+0x15f/0x1e0 net/socket.c:967 call_read_iter include/linux/fs.h:1864 [inline] new_sync_read+0x389/0x4f0 fs/read_write.c:414 __vfs_read+0xb1/0xc0 fs/read_write.c:427 vfs_read fs/read_write.c:461 [inline] vfs_read+0x143/0x2c0 fs/read_write.c:446 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7268 Comm: syz-fuzzer Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/10/12 16:07 | https://github.com/google/ktsan.git kcsan | d724f94f63de | 426631dd | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/10/10 13:27 | https://github.com/google/ktsan.git kcsan | d724f94f63de | d52eff28 | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/10/08 03:15 | https://github.com/google/ktsan.git kcsan | c1c7521f03c7 | 28ac6e64 | .config | console log | report | ci2-upstream-kcsan-gce |