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ip: fix crash in "ip neigh show"

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parse_rtattr() was using tb[] array without initializing it.

Based on patch by Balaji Punnuru <balaji_punnuru@cable.comcast.com>

function                                             old     new   delta
parse_rtattr                                          85     107     +22
print_route                                         1630    1617     -13
print_linkinfo                                       807     794     -13
iproute_get                                          835     822     -13
print_rule                                           680     665     -15
ll_remember_index                                    263     248     -15
print_addrinfo                                      1223    1197     -26
ipaddr_list_or_flush                                1253    1223     -30
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/7 up/down: 22/-125)          Total: -103 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-02-08 08:42:37 +01:00
parent 237a900bc5
commit 68ae54243c
7 changed files with 28 additions and 20 deletions
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4
networking/libiproute/iproute.c
View File

@ -83,7 +83,7 @@ static int FAST_FUNC print_route(const struct sockaddr_nl *who UNUSED_PARAM,
if (len < 0)
bb_error_msg_and_die("wrong nlmsg len %d", len);
memset(tb, 0, sizeof(tb));
//memset(tb, 0, sizeof(tb)); - parse_rtattr does this
parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
#if HAVE_RTA_TABLE
@ -1081,7 +1081,7 @@ static int iproute_get(char **argv)
bb_error_msg_and_die("wrong len %d", len);
}
memset(tb, 0, sizeof(tb));
//memset(tb, 0, sizeof(tb)); - parse_rtattr does this
parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
if (tb[RTA_PREFSRC]) {