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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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26fc181e6c
Both gue_err() and gue6_err() incorrectly assume
linear skbs. Fix them to use pskb_may_pull().
BUG: KMSAN: uninit-value in gue6_err+0x475/0xc40 net/ipv6/fou6.c:101
CPU: 0 PID: 18083 Comm: syz-executor1 Not tainted 5.0.0-rc1+ #7
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+0x173/0x1d0 lib/dump_stack.c:113
kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
__msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
gue6_err+0x475/0xc40 net/ipv6/fou6.c:101
__udp6_lib_err_encap_no_sk net/ipv6/udp.c:434 [inline]
__udp6_lib_err_encap net/ipv6/udp.c:491 [inline]
__udp6_lib_err+0x18d0/0x2590 net/ipv6/udp.c:522
udplitev6_err+0x118/0x130 net/ipv6/udplite.c:27
icmpv6_notify+0x462/0x9f0 net/ipv6/icmp.c:784
icmpv6_rcv+0x18ac/0x3fa0 net/ipv6/icmp.c:872
ip6_protocol_deliver_rcu+0xb5a/0x23a0 net/ipv6/ip6_input.c:394
ip6_input_finish net/ipv6/ip6_input.c:434 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
ip6_input+0x2b6/0x350 net/ipv6/ip6_input.c:443
dst_input include/net/dst.h:450 [inline]
ip6_rcv_finish+0x4e7/0x6d0 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:289 [inline]
ipv6_rcv+0x34b/0x3f0 net/ipv6/ip6_input.c:272
__netif_receive_skb_one_core net/core/dev.c:4973 [inline]
__netif_receive_skb net/core/dev.c:5083 [inline]
process_backlog+0x756/0x10e0 net/core/dev.c:5923
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x78b/0x1a60 net/core/dev.c:6412
__do_softirq+0x53f/0x93a kernel/softirq.c:293
do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1039
</IRQ>
do_softirq kernel/softirq.c:338 [inline]
__local_bh_enable_ip+0x16f/0x1a0 kernel/softirq.c:190
local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline]
ip6_finish_output2+0x1d64/0x25f0 net/ipv6/ip6_output.c:121
ip6_finish_output+0xae4/0xbc0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x5ca/0x710 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:444 [inline]
ip6_local_out+0x164/0x1d0 net/ipv6/output_core.c:176
ip6_send_skb+0xfa/0x390 net/ipv6/ip6_output.c:1727
udp_v6_send_skb+0x1733/0x1d20 net/ipv6/udp.c:1169
udpv6_sendmsg+0x424e/0x45d0 net/ipv6/udp.c:1466
inet_sendmsg+0x54a/0x720 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg net/socket.c:631 [inline]
___sys_sendmsg+0xdb9/0x11b0 net/socket.c:2116
__sys_sendmmsg+0x580/0xad0 net/socket.c:2211
__do_sys_sendmmsg net/socket.c:2240 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2237
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2237
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457ec9
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4a5204fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 00000000040001ab RSI: 0000000020000240 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4a520506d4
R13: 00000000004c4ce5 R14: 00000000004d85d8 R15: 00000000ffffffff
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline]
kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:159
kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185
slab_post_alloc_hook mm/slab.h:446 [inline]
slab_alloc_node mm/slub.c:2754 [inline]
__kmalloc_node_track_caller+0xe9e/0xff0 mm/slub.c:4377
__kmalloc_reserve net/core/skbuff.c:140 [inline]
__alloc_skb+0x309/0xa20 net/core/skbuff.c:208
alloc_skb include/linux/skbuff.h:1012 [inline]
alloc_skb_with_frags+0x1c7/0xac0 net/core/skbuff.c:5288
sock_alloc_send_pskb+0xafd/0x10a0 net/core/sock.c:2091
sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2108
__ip6_append_data+0x42ed/0x5dc0 net/ipv6/ip6_output.c:1443
ip6_append_data+0x3c2/0x650 net/ipv6/ip6_output.c:1619
icmp6_send+0x2f5c/0x3c40 net/ipv6/icmp.c:574
icmpv6_send+0xe5/0x110 net/ipv6/ip6_icmp.c:43
ip6_link_failure+0x5c/0x2c0 net/ipv6/route.c:2231
dst_link_failure include/net/dst.h:427 [inline]
vti_xmit net/ipv4/ip_vti.c:229 [inline]
vti_tunnel_xmit+0xf3b/0x1ea0 net/ipv4/ip_vti.c:265
__netdev_start_xmit include/linux/netdevice.h:4382 [inline]
netdev_start_xmit include/linux/netdevice.h:4391 [inline]
xmit_one net/core/dev.c:3278 [inline]
dev_hard_start_xmit+0x604/0xc40 net/core/dev.c:3294
__dev_queue_xmit+0x2e48/0x3b80 net/core/dev.c:3864
dev_queue_xmit+0x4b/0x60 net/core/dev.c:3897
neigh_direct_output+0x42/0x50 net/core/neighbour.c:1511
neigh_output include/net/neighbour.h:508 [inline]
ip6_finish_output2+0x1d4e/0x25f0 net/ipv6/ip6_output.c:120
ip6_finish_output+0xae4/0xbc0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x5ca/0x710 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:444 [inline]
ip6_local_out+0x164/0x1d0 net/ipv6/output_core.c:176
ip6_send_skb+0xfa/0x390 net/ipv6/ip6_output.c:1727
udp_v6_send_skb+0x1733/0x1d20 net/ipv6/udp.c:1169
udpv6_sendmsg+0x424e/0x45d0 net/ipv6/udp.c:1466
inet_sendmsg+0x54a/0x720 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg net/socket.c:631 [inline]
___sys_sendmsg+0xdb9/0x11b0 net/socket.c:2116
__sys_sendmmsg+0x580/0xad0 net/socket.c:2211
__do_sys_sendmmsg net/socket.c:2240 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2237
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2237
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
Fixes:
|
||
|---|---|---|
| .. | ||
| ila | ||
| netfilter | ||
| addrconf_core.c | ||
| addrconf.c | ||
| addrlabel.c | ||
| af_inet6.c | ||
| ah6.c | ||
| anycast.c | ||
| calipso.c | ||
| datagram.c | ||
| esp6_offload.c | ||
| esp6.c | ||
| exthdrs_core.c | ||
| exthdrs_offload.c | ||
| exthdrs.c | ||
| fib6_notifier.c | ||
| fib6_rules.c | ||
| fou6.c | ||
| icmp.c | ||
| inet6_connection_sock.c | ||
| inet6_hashtables.c | ||
| ip6_checksum.c | ||
| ip6_fib.c | ||
| ip6_flowlabel.c | ||
| ip6_gre.c | ||
| ip6_icmp.c | ||
| ip6_input.c | ||
| ip6_offload.c | ||
| ip6_offload.h | ||
| ip6_output.c | ||
| ip6_tunnel.c | ||
| ip6_udp_tunnel.c | ||
| ip6_vti.c | ||
| ip6mr.c | ||
| ipcomp6.c | ||
| ipv6_sockglue.c | ||
| Kconfig | ||
| Makefile | ||
| mcast_snoop.c | ||
| mcast.c | ||
| mip6.c | ||
| ndisc.c | ||
| netfilter.c | ||
| output_core.c | ||
| ping.c | ||
| proc.c | ||
| protocol.c | ||
| raw.c | ||
| reassembly.c | ||
| route.c | ||
| seg6_hmac.c | ||
| seg6_iptunnel.c | ||
| seg6_local.c | ||
| seg6.c | ||
| sit.c | ||
| syncookies.c | ||
| sysctl_net_ipv6.c | ||
| tcp_ipv6.c | ||
| tcpv6_offload.c | ||
| tunnel6.c | ||
| udp_impl.h | ||
| udp_offload.c | ||
| udp.c | ||
| udplite.c | ||
| xfrm6_input.c | ||
| xfrm6_mode_beet.c | ||
| xfrm6_mode_ro.c | ||
| xfrm6_mode_transport.c | ||
| xfrm6_mode_tunnel.c | ||
| xfrm6_output.c | ||
| xfrm6_policy.c | ||
| xfrm6_protocol.c | ||
| xfrm6_state.c | ||
| xfrm6_tunnel.c | ||