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Fix stack overflow in _nss_dns_getnetbyname_r (BZ19879)

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This commit is contained in:
Stan Shebs 2016-05-09 10:29:27 -07:00
parent c93632edca
commit a48e32ee70
2 changed files with 6 additions and 4 deletions
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5
README.google
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@ -570,3 +570,8 @@ sysdeps/powerpc/bits/fenvinline.h
nptl/sysdeps/unix/sysv/linux/register-atfork.c
For b/28011264, detect and work around loop in fork handler list.
(stanshebs, google-local)
resolv/nss_dns/dns-network.c
For b/27917753, fix stack overflow in _nss_dns_getnetbyname_r (BZ19879)
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=317b199b4aff8cfa27f2302ab404d2bb5032b9a4
(stanshebs, google-local)

5
resolv/nss_dns/dns-network.c
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@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
} net_buffer;
querybuf *orig_net_buffer;
int anslen;
char *qbuf;
enum nss_status status;
if (__res_maybe_init (&_res, 0) == -1)
return NSS_STATUS_UNAVAIL;
qbuf = strdupa (name);
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{