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| author | Quentin Rameau | 2018-04-01 19:49:58 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2018-04-01 19:51:14 +0200 |
| commit | e2afae6303e871a31a061d03359cfcd5dd86c088 (patch) | |
| tree | 40482184a4ff53ea4fd3439f96e0e7e967a075cc /editors/sed.c | |
| parent | 2da9724b56169f00bd7fb6b9a11c9409a7620981 (diff) | |
| download | busybox-e2afae6303e871a31a061d03359cfcd5dd86c088.zip busybox-e2afae6303e871a31a061d03359cfcd5dd86c088.tar.gz | |
sed: prevent overflow of length from bb_get_chunk_from_file
This fragment did not work right:
temp = bb_get_chunk_from_file(fp, &len);
if (temp) {
/* len > 0 here, it's ok to do temp[len-1] */
char c = temp[len-1];
With "int len" _sign-extending_, temp[len-1] can refer to a wrong location
if len > 0x7fffffff.
Signed-off-by: Quentin Rameau <quinq@fifth.space>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'editors/sed.c')
| -rw-r--r-- | editors/sed.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/editors/sed.c b/editors/sed.c index 9d800c2..4702208 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -988,7 +988,7 @@ static void flush_append(char *last_puts_char) static char *get_next_line(char *gets_char, char *last_puts_char) { char *temp = NULL; - int len; + size_t len; char gc; flush_append(last_puts_char); |