diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2006-11-29 11:40:22 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2006-11-29 11:40:22 +0100 |
| commit | 82182ed2ce8df69635bcfed4baad8bbfae842bc8 (patch) | |
| tree | da5bc595a8151b82150069759097c6dc1d358d4d /net | |
| parent | cf76a4a8bd6b14d9fc09e2d050253dc70312c273 (diff) | |
add forgotten ->b_data in memcpy() call in ext3/resize.c (oopsable)
sbi->s_group_desc is an array of pointers to buffer_head. memcpy() of
buffer size from address of buffer_head is a bad idea - it will generate
junk in any case, may oops if buffer_head is close to the end of slab
page and next page is not mapped and isn't what was intended there.
IOW, ->b_data is missing in that call. Fortunately, result doesn't go
into the primary on-disk data structures, so only backup ones get crap
written to them; that had allowed this bug to remain unnoticed until
now.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_output.c | 4 | ||||
| -rw-r--r-- | net/ipv6/ip6_output.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 8dcba3887f04..b24c6a0c5574 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -946,7 +946,7 @@ alloc_new_skb: skb_prev->csum = csum_sub(skb_prev->csum, skb->csum); data += fraggap; - skb_trim(skb_prev, maxfraglen); + pskb_trim_unique(skb_prev, maxfraglen); } copy = datalen - transhdrlen - fraggap; @@ -1139,7 +1139,7 @@ ssize_t ip_append_page(struct sock *sk, struct page *page, data, fraggap, 0); skb_prev->csum = csum_sub(skb_prev->csum, skb->csum); - skb_trim(skb_prev, maxfraglen); + pskb_trim_unique(skb_prev, maxfraglen); } /* diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 5bf70b1442ea..1b528aa13200 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1046,7 +1046,7 @@ alloc_new_skb: skb_prev->csum = csum_sub(skb_prev->csum, skb->csum); data += fraggap; - skb_trim(skb_prev, maxfraglen); + pskb_trim_unique(skb_prev, maxfraglen); } copy = datalen - transhdrlen - fraggap; if (copy < 0) { |