diff options
| author | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-08-15 19:47:39 +0000 |
|---|---|---|
| committer | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-08-15 19:47:39 +0000 |
| commit | 38e722f741c628bd6dbfbd74c8e191beeb460203 (patch) | |
| tree | 4b1ce3612ce599e6f6ee310b1302515246e08ffd /ext | |
| parent | 12b6cd61c0740af71f12c4e1a247ee502e8e78dd (diff) | |
merge revision(s) 55410: [Backport #12488]
* ext/date/date_strftime.c (date_strftime_with_tmx): reject too
large precision to get rid of buffer overflow.
reported by Guido Vranken <guido AT guidovranken.nl>.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55910 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext')
| -rw-r--r-- | ext/date/date_strftime.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/ext/date/date_strftime.c b/ext/date/date_strftime.c index 20931a3124..9d8167b612 100644 --- a/ext/date/date_strftime.c +++ b/ext/date/date_strftime.c @@ -48,7 +48,7 @@ downcase(char *s, size_t i) /* strftime --- produce formatted time */ static size_t -date_strftime_with_tmx(char *s, size_t maxsize, const char *format, +date_strftime_with_tmx(char *s, const size_t maxsize, const char *format, const struct tmx *tmx) { char *endp = s + maxsize; @@ -575,7 +575,12 @@ date_strftime_with_tmx(char *s, size_t maxsize, const char *format, case '5': case '6': case '7': case '8': case '9': { char *e; - precision = (int)strtoul(format, &e, 10); + unsigned long prec = strtoul(format, &e, 10); + if (prec > INT_MAX || prec > maxsize) { + errno = ERANGE; + return 0; + } + precision = (int)prec; format = e - 1; goto again; } |