diff options
| author | Matthias Kaehlcke <mka@chromium.org> | 2017-04-13 20:05:04 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-04-18 12:02:18 +0300 |
| commit | aa1702dd162f420bf85ecef0c77686ef0dbc1496 (patch) | |
| tree | 54de2141081fb66adb12f8583a66dbf9a7ebcac0 /net/wireless | |
| parent | f64331d58045b05e5af581284884d5df9b26c031 (diff) | |
| download | linux-aa1702dd162f420bf85ecef0c77686ef0dbc1496.tar.xz | |
cfg80211: Fix array-bounds warning in fragment copy
__ieee80211_amsdu_copy_frag intentionally initializes a pointer to
array[-1] to increment it later to valid values. clang rightfully
generates an array-bounds warning on the initialization statement.
Initialize the pointer to array[0] and change the algorithm from
increment before to increment after consume.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/util.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index 88f3a11dbcd3..a46bc42d0910 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -659,7 +659,7 @@ __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, int offset, int len) { struct skb_shared_info *sh = skb_shinfo(skb); - const skb_frag_t *frag = &sh->frags[-1]; + const skb_frag_t *frag = &sh->frags[0]; struct page *frag_page; void *frag_ptr; int frag_len, frag_size; @@ -672,10 +672,10 @@ __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, while (offset >= frag_size) { offset -= frag_size; - frag++; frag_page = skb_frag_page(frag); frag_ptr = skb_frag_address(frag); frag_size = skb_frag_size(frag); + frag++; } frag_ptr += offset; @@ -687,12 +687,12 @@ __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, len -= cur_len; while (len > 0) { - frag++; frag_len = skb_frag_size(frag); cur_len = min(len, frag_len); __frame_add_frag(frame, skb_frag_page(frag), skb_frag_address(frag), cur_len, frag_len); len -= cur_len; + frag++; } } |