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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 17:08:54 +0100 |
| commit | 9ca718743ad8402958637bfc196d7b62371a1b9f (patch) | |
| tree | 89d5f226138c49fdd1bfd2116b28b2b469357280 /net/sched/cls_api.c | |
| parent | Fix unefficient call to memset before memcpu in nla_strlcpy. (diff) | |
| download | linux-9ca718743ad8402958637bfc196d7b62371a1b9f.tar.xz linux-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 'net/sched/cls_api.c')
| -rw-r--r-- | net/sched/cls_api.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index ba0715ee9eac..c2e9661e20d3 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -223,7 +223,7 @@ static inline u32 tcf_auto_prio(struct tcf_proto *tp) static bool tcf_proto_check_kind(struct nlattr *kind, char *name) { if (kind) - return nla_strlcpy(name, kind, IFNAMSIZ) >= IFNAMSIZ; + return nla_strlcpy(name, kind, IFNAMSIZ) < 0; memset(name, 0, IFNAMSIZ); return false; } |