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netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. ================================================================== BUG: KMSAN: uninit-value in sock_rps_save_rxhash include/net/sock.h:956 [inline] BUG: KMSAN: uninit-value in tcp_v4_do_rcv+0x4a1/0xd90 net/ipv4/tcp_ipv4.c:1468 CPU: 0 PID: 4527 Comm: sshd Not tainted 4.17.0+ #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1368 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:634 sock_rps_save_rxhash include/net/sock.h:956 [inline] tcp_v4_do_rcv+0x4a1/0xd90 net/ipv4/tcp_ipv4.c:1468 tcp_v4_rcv+0x676e/0x6cd0 net/ipv4/tcp_ipv4.c:1765 ip_local_deliver_finish+0x887/0xed0 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:288 [inline] ip_local_deliver+0x43c/0x4e0 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0xa1b/0x1d10 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:288 [inline] ip_rcv+0x1168/0x16a0 net/ipv4/ip_input.c:492 __netif_receive_skb_core+0x47f3/0x4aa0 net/core/dev.c:4592 __netif_receive_skb net/core/dev.c:4657 [inline] netif_receive_skb_internal+0x49d/0x630 net/core/dev.c:4731 napi_skb_finish net/core/dev.c:5093 [inline] napi_gro_receive+0x6a7/0xb60 net/core/dev.c:5124 receive_buf+0x4c96/0x6ae0 drivers/net/virtio_net.c:945 virtnet_receive drivers/net/virtio_net.c:1200 [inline] virtnet_poll+0x8ff/0x1420 drivers/net/virtio_net.c:1282 napi_poll net/core/dev.c:5735 [inline] net_rx_action+0x766/0x1a80 net/core/dev.c:5801 __do_softirq+0x592/0x979 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:366 [inline] irq_exit+0x207/0x240 kernel/softirq.c:407 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:525 do_IRQ+0x17d/0x1c0 arch/x86/kernel/irq.c:264 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:646 </IRQ> RIP: 0010:msan_get_shadow_origin_ptr+0x102/0x2c0 include/linux/mmzone.h:1205 RSP: 0018:ffff88019ea3f418 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffd9 RAX: ffff880243f08e14 RBX: ffffffff8b58a000 RCX: ffff88021fff1700 RDX: 0000000000000700 RSI: 0000000000000000 RDI: ffff8801c3f08e14 RBP: ffff88019ea3f460 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff887baaf0 R12: 0000000000000002 R13: ffff8801c3889d40 R14: ffffffff8b589000 R15: ffff8801c3f08e14 __msan_metadata_ptr_for_load_2+0x10/0x20 mm/kmsan/kmsan_instr.c:332 tcp_poll+0xb68/0xfa0 net/ipv4/tcp.c:587 sock_poll+0x340/0x380 net/socket.c:1137 do_select+0x18e5/0x2bf0 fs/select.c:512 core_sys_select+0xb1c/0x1080 fs/select.c:655 kern_select fs/select.c:696 [inline] __do_sys_select fs/select.c:705 [inline] __se_sys_select+0x24b/0x600 fs/select.c:702 __x64_sys_select+0x15d/0x1b0 fs/select.c:702 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x7f0a74189dd3 RSP: 002b:00007ffdf9cc00f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 RAX: ffffffffffffffda RBX: 00007ffdf9cc0180 RCX: 00007f0a74189dd3 RDX: 000055fa06577ae0 RSI: 000055fa06577b00 RDI: 000000000000000c RBP: 000055fa062d48dc R08: 00007ffdf9cc0120 R09: 0101010101010101 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdf9cc0188 R13: 0000000000000000 R14: 00007ffdf9cc0178 R15: 00007ffdf9cc017c Local variable description: ----skb.addr@__netif_receive_skb_core Variable was created at: __netif_receive_skb_core+0xb7/0x4aa0 net/core/dev.c:4462 __netif_receive_skb net/core/dev.c:4657 [inline] netif_receive_skb_internal+0x49d/0x630 net/core/dev.c:4731 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/07/04 12:13 | https://github.com/google/kmsan.git master | 4ca559bbdeaf | 317fc8ea | .config | console log | report | ci-upstream-kmsan-gce |