diff options
Diffstat (limited to 'pkgs/development/libraries/glibc/2.17/cve-2013-0242.patch')
| -rw-r--r-- | pkgs/development/libraries/glibc/2.17/cve-2013-0242.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/pkgs/development/libraries/glibc/2.17/cve-2013-0242.patch b/pkgs/development/libraries/glibc/2.17/cve-2013-0242.patch new file mode 100644 index 000000000000..1d6557071e1a --- /dev/null +++ b/pkgs/development/libraries/glibc/2.17/cve-2013-0242.patch @@ -0,0 +1,87 @@ +When extending regex buffers, make sure we allocate enough room for the +state log. Merely doubling the space may not be enough if the current +node has accepted a long run of characters. This part of the code only +triggers with multibyte characters. + +Andreas. + + [BZ #15078] + * posix/regexec.c (extend_buffers): Add parameter min_len. + (check_matching): Pass minimum needed length. + (clean_state_log_if_needed): Likewise. + (get_subexp): Likewise. + * posix/Makefile (tests): Add bug-regex34. + (bug-regex34-ENV): Define. + * posix/bug-regex34.c: New file. + +diff --git a/posix/regexec.c b/posix/regexec.c +index 7f2de85..5ca2bf6 100644 +--- a/posix/regexec.c ++++ b/posix/regexec.c +@@ -197,7 +197,7 @@ static int group_nodes_into_DFAstates (const re_dfa_t *dfa, + static int check_node_accept (const re_match_context_t *mctx, + const re_token_t *node, int idx) + internal_function; +-static reg_errcode_t extend_buffers (re_match_context_t *mctx) ++static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len) + internal_function; + + /* Entry point for POSIX code. */ +@@ -1160,7 +1160,7 @@ check_matching (re_match_context_t *mctx, int fl_longest_match, + || (BE (next_char_idx >= mctx->input.valid_len, 0) + && mctx->input.valid_len < mctx->input.len)) + { +- err = extend_buffers (mctx); ++ err = extend_buffers (mctx, next_char_idx + 1); + if (BE (err != REG_NOERROR, 0)) + { + assert (err == REG_ESPACE); +@@ -1738,7 +1738,7 @@ clean_state_log_if_needed (re_match_context_t *mctx, int next_state_log_idx) + && mctx->input.valid_len < mctx->input.len)) + { + reg_errcode_t err; +- err = extend_buffers (mctx); ++ err = extend_buffers (mctx, next_state_log_idx + 1); + if (BE (err != REG_NOERROR, 0)) + return err; + } +@@ -2792,7 +2792,7 @@ get_subexp (re_match_context_t *mctx, int bkref_node, int bkref_str_idx) + if (bkref_str_off >= mctx->input.len) + break; + +- err = extend_buffers (mctx); ++ err = extend_buffers (mctx, bkref_str_off + 1); + if (BE (err != REG_NOERROR, 0)) + return err; + +@@ -4102,7 +4102,7 @@ check_node_accept (const re_match_context_t *mctx, const re_token_t *node, + + static reg_errcode_t + internal_function __attribute_warn_unused_result__ +-extend_buffers (re_match_context_t *mctx) ++extend_buffers (re_match_context_t *mctx, int min_len) + { + reg_errcode_t ret; + re_string_t *pstr = &mctx->input; +@@ -4111,8 +4111,10 @@ extend_buffers (re_match_context_t *mctx) + if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0)) + return REG_ESPACE; + +- /* Double the lengthes of the buffers. */ +- ret = re_string_realloc_buffers (pstr, MIN (pstr->len, pstr->bufs_len * 2)); ++ /* Double the lengthes of the buffers, but allocate at least MIN_LEN. */ ++ ret = re_string_realloc_buffers (pstr, ++ MAX (min_len, ++ MIN (pstr->len, pstr->bufs_len * 2))); + if (BE (ret != REG_NOERROR, 0)) + return ret; + +-- +1.8.1.2 + + +-- +Andreas Schwab, SUSE Labs, schwab@suse.de +GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 +"And now for something completely different." + |