gnu/packages/patches/glibc-CVE-2019-9169.patch

   1 Fix <https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9169>.
   2
   3 Taken from this upstream commit, sans ChangeLog updates:
   4 https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=583dd860d5b833037175247230a328f0050dbfe9
   5
   6 diff --git a/posix/regexec.c b/posix/regexec.c
   7 index 91d5a797b8..084b1222d9 100644
   8 --- a/posix/regexec.c
   9 +++ b/posix/regexec.c
  10 @@ -1293,8 +1293,10 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
  11               else if (naccepted)
  12                 {
  13                   char *buf = (char *) re_string_get_buffer (&mctx->input);
  14 -                 if (memcmp (buf + regs[subexp_idx].rm_so, buf + *pidx,
  15 -                             naccepted) != 0)
  16 +                 if (mctx->input.valid_len - *pidx < naccepted
  17 +                     || (memcmp (buf + regs[subexp_idx].rm_so, buf + *pidx,
  18 +                                 naccepted)
  19 +                         != 0))
  20                     return -1;
  21                 }
  22             }