diff options
| author | Matthias Kaehlcke <mka@chromium.org> | 2017-04-13 10:05:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-08 12:12:46 +0200 |
| commit | 4bb797afd7ba5d76fa6fa5a8d4fe930c2c2e029d (patch) | |
| tree | db02d660f204ba6a9a0dc644c6ddf4edb0b3e807 /net/wireless | |
| parent | 7164cb7360fe981fc4748afec4528f5c46091c86 (diff) | |
cfg80211: Fix array-bounds warning in fragment copy
commit aa1702dd162f420bf85ecef0c77686ef0dbc1496 upstream.
__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>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 c921c2eed15d..bb54d9db82df 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -663,7 +663,7 @@ __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; @@ -676,10 +676,10 @@ __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; @@ -691,12 +691,12 @@ __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++; } } |