diff options
| author | Andrey Vagin <[email protected]> | 2015-10-02 00:05:36 +0300 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-10-05 06:33:09 -0700 |
| commit | e9193d60d363e4dff75ff6d43a48f22be26d59c7 (patch) | |
| tree | e4b04f96cfc0751df1e06828d603082823003f30 /net/unix/af_unix.c | |
| parent | 215c90afb9ea633026273d81ac9c9ece2b1acd58 (diff) | |
net/unix: fix logic about sk_peek_offset
Now send with MSG_PEEK can return data from multiple SKBs.
Unfortunately we take into account the peek offset for each skb,
that is wrong. We need to apply the peek offset only once.
In addition, the peek offset should be used only if MSG_PEEK is set.
Cc: "David S. Miller" <[email protected]> (maintainer:NETWORKING
Cc: Eric Dumazet <[email protected]> (commit_signer:1/14=7%)
Cc: Aaron Conole <[email protected]>
Fixes: 9f389e35674f ("af_unix: return data from multiple SKBs on recv() with MSG_PEEK flag")
Signed-off-by: Andrey Vagin <[email protected]>
Tested-by: Aaron Conole <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
| -rw-r--r-- | net/unix/af_unix.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index ef31b40ad550..94f658235fb4 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2064,6 +2064,11 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state) goto out; } + if (flags & MSG_PEEK) + skip = sk_peek_offset(sk, flags); + else + skip = 0; + do { int chunk; struct sk_buff *skb, *last; @@ -2112,7 +2117,6 @@ unlock: break; } - skip = sk_peek_offset(sk, flags); while (skip >= unix_skb_len(skb)) { skip -= unix_skb_len(skb); last = skb; @@ -2179,14 +2183,12 @@ unlock: if (UNIXCB(skb).fp) scm.fp = scm_fp_dup(UNIXCB(skb).fp); - if (skip) { - sk_peek_offset_fwd(sk, chunk); - skip -= chunk; - } + sk_peek_offset_fwd(sk, chunk); if (UNIXCB(skb).fp) break; + skip = 0; last = skb; last_len = skb->len; unix_state_lock(sk); |