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================================================================== BUG: KMSAN: uninit-value in __skb_flow_dissect_gre net/core/flow_dissector.c:338 [inline] BUG: KMSAN: uninit-value in __skb_flow_dissect+0x401f/0x6580 net/core/flow_dissector.c:901 CPU: 0 PID: 3574 Comm: syzkaller776093 Not tainted 4.16.0+ #84 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 __skb_flow_dissect_gre net/core/flow_dissector.c:338 [inline] __skb_flow_dissect+0x401f/0x6580 net/core/flow_dissector.c:901 __skb_get_hash_symmetric+0x10b/0x230 net/core/flow_dissector.c:1217 fanout_demux_hash net/packet/af_packet.c:1339 [inline] packet_rcv_fanout+0x38f/0x8d0 net/packet/af_packet.c:1454 dev_queue_xmit_nit+0x111a/0x11e0 net/core/dev.c:1991 xmit_one net/core/dev.c:3022 [inline] dev_hard_start_xmit+0x27c/0xc70 net/core/dev.c:3042 __dev_queue_xmit+0x22d9/0x2b60 net/core/dev.c:3557 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3590 neigh_resolve_output+0xac6/0xb60 net/core/neighbour.c:1350 neigh_output include/net/neighbour.h:482 [inline] ip_finish_output2+0x1238/0x1380 net/ipv4/ip_output.c:229 ip_finish_output+0xcb0/0xff0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip_output+0x502/0x5c0 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:443 [inline] ip_local_out net/ipv4/ip_output.c:124 [inline] ip_send_skb+0x5f3/0x820 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x105/0x170 net/ipv4/ip_output.c:1434 raw_sendmsg+0x2960/0x3ed0 net/ipv4/raw.c:684 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] SYSC_sendto+0x6c3/0x7e0 net/socket.c:1747 SyS_sendto+0x8a/0xb0 net/socket.c:1715 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x43ffc9 RSP: 002b:00007fffded673e8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ffc9 RDX: 0000000000000004 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000020000140 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018f0 R13: 0000000000401980 R14: 0000000000000000 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:526 __msan_memcpy+0x19f/0x1f0 mm/kmsan/kmsan_instr.c:470 skb_copy_bits+0x63a/0xdb0 net/core/skbuff.c:2046 __skb_header_pointer include/linux/skbuff.h:3337 [inline] __skb_flow_dissect_gre net/core/flow_dissector.c:332 [inline] __skb_flow_dissect+0x3931/0x6580 net/core/flow_dissector.c:901 __skb_get_hash_symmetric+0x10b/0x230 net/core/flow_dissector.c:1217 fanout_demux_hash net/packet/af_packet.c:1339 [inline] packet_rcv_fanout+0x38f/0x8d0 net/packet/af_packet.c:1454 dev_queue_xmit_nit+0x111a/0x11e0 net/core/dev.c:1991 xmit_one net/core/dev.c:3022 [inline] dev_hard_start_xmit+0x27c/0xc70 net/core/dev.c:3042 __dev_queue_xmit+0x22d9/0x2b60 net/core/dev.c:3557 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3590 neigh_resolve_output+0xac6/0xb60 net/core/neighbour.c:1350 neigh_output include/net/neighbour.h:482 [inline] ip_finish_output2+0x1238/0x1380 net/ipv4/ip_output.c:229 ip_finish_output+0xcb0/0xff0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip_output+0x502/0x5c0 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:443 [inline] ip_local_out net/ipv4/ip_output.c:124 [inline] ip_send_skb+0x5f3/0x820 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x105/0x170 net/ipv4/ip_output.c:1434 raw_sendmsg+0x2960/0x3ed0 net/ipv4/raw.c:684 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] SYSC_sendto+0x6c3/0x7e0 net/socket.c:1747 SyS_sendto+0x8a/0xb0 net/socket.c:1715 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:814 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:868 __alloc_pages_nodemask+0xf5b/0x5dc0 mm/page_alloc.c:4283 alloc_pages_current+0x6b5/0x970 mm/mempolicy.c:2055 alloc_pages include/linux/gfp.h:494 [inline] skb_page_frag_refill+0x3ba/0x5e0 net/core/sock.c:2208 sk_page_frag_refill+0xa4/0x340 net/core/sock.c:2228 __ip_append_data+0x107e/0x3d10 net/ipv4/ip_output.c:1057 ip_append_data+0x2fb/0x440 net/ipv4/ip_output.c:1170 raw_sendmsg+0x287b/0x3ed0 net/ipv4/raw.c:678 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] SYSC_sendto+0x6c3/0x7e0 net/socket.c:1747 SyS_sendto+0x8a/0xb0 net/socket.c:1715 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/04/18 15:04 | https://github.com/google/kmsan.git master | 48c6a2b0ab1b | 52643b44 | .config | console log | report | syz | C | ci-upstream-kmsan-gce | |||
2018/04/20 23:31 | https://github.com/google/kmsan.git master | 48c6a2b0ab1b | cc402841 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/19 18:16 | https://github.com/google/kmsan.git master | 48c6a2b0ab1b | 3642839c | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/18 13:12 | https://github.com/google/kmsan.git master | 48c6a2b0ab1b | 52643b44 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/16 00:08 | https://github.com/google/kmsan.git master | 35ff515e4bda | 7a67784c | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/11 12:54 | https://github.com/google/kmsan.git master | 35ff515e4bda | 8b8de427 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/08 13:06 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | 77bd5117 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/08 09:56 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | 66f22a7f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/08 09:53 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | 66f22a7f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 07:41 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 05:24 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 03:33 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 02:36 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 01:17 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/04/07 00:45 | https://github.com/google/kmsan.git master | e2ab7e8abba4 | d613535f | .config | console log | report | ci-upstream-kmsan-gce |