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| author | Paul Eggert <eggert@cs.ucla.edu> | 2019-01-21 11:08:13 -0800 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2019-03-16 23:32:36 +0100 |
| commit | 2aee101ff6075dd97a99982a1ba29e21ec25c52f (patch) | |
| tree | 8830d994dfc2177b900a9dd0828833eb155a4b6d /posix | |
| parent | 4bf5ab3196bd27e48d87d4a1cd91efd39772e026 (diff) | |
| download | glibc-2aee101ff6075dd97a99982a1ba29e21ec25c52f.tar.gz glibc-2aee101ff6075dd97a99982a1ba29e21ec25c52f.tar.xz glibc-2aee101ff6075dd97a99982a1ba29e21ec25c52f.zip | |
regex: fix read overrun [BZ #24114]
Problem found by AddressSanitizer, reported by Hongxu Chen in: https://debbugs.gnu.org/34140 * posix/regexec.c (proceed_next_node): Do not read past end of input buffer. (cherry picked from commit 583dd860d5b833037175247230a328f0050dbfe9)
Diffstat (limited to 'posix')
| -rw-r--r-- | posix/regexec.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/posix/regexec.c b/posix/regexec.c index 73644c2341..06b8487c3e 100644 --- a/posix/regexec.c +++ b/posix/regexec.c @@ -1289,8 +1289,10 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs, else if (naccepted) { char *buf = (char *) re_string_get_buffer (&mctx->input); - if (memcmp (buf + regs[subexp_idx].rm_so, buf + *pidx, - naccepted) != 0) + if (mctx->input.valid_len - *pidx < naccepted + || (memcmp (buf + regs[subexp_idx].rm_so, buf + *pidx, + naccepted) + != 0)) return -1; } } |