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| author |   Francis Laniel <laniel_francis@privacyrequired.com> | 2020-11-15 18:08:05 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2020-11-16 08:08:54 -0800 |
| commit | 9ca718743ad8402958637bfc196d7b62371a1b9f (patch) | |
| tree | 89d5f226138c49fdd1bfd2116b28b2b469357280 /include/net/pkt_cls.h | |
| parent | Fix unefficient call to memset before memcpu in nla_strlcpy. (diff) | |
| download | linux-dev-9ca718743ad8402958637bfc196d7b62371a1b9f.tar.xz linux-dev-9ca718743ad8402958637bfc196d7b62371a1b9f.zip | |
Modify return value of nla_strlcpy to match that of strscpy.
nla_strlcpy now returns -E2BIG if src was truncated when written to dst.
It also returns this error value if dstsize is 0 or higher than INT_MAX.
For example, if src is "foo\0" and dst is 3 bytes long, the result will be:
1. "foG" after memcpy (G means garbage).
2. "fo\0" after memset.
3. -E2BIG is returned because src was not completely written into dst.
The callers of nla_strlcpy were modified to take into account this modification.
Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | include/net/pkt_cls.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index d4d461236351..db9a828f4f4f 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -512,7 +512,7 @@ tcf_change_indev(struct net *net, struct nlattr *indev_tlv, char indev[IFNAMSIZ]; struct net_device *dev; - if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) { + if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) < 0) { NL_SET_ERR_MSG_ATTR(extack, indev_tlv, "Interface name too long"); return -EINVAL; |