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| author | James Morris <jmorris@namei.org> | 2008-11-14 11:29:12 +1100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-11-14 11:29:12 +1100 |
| commit | 2b828925652340277a889cbc11b2d0637f7cdaf7 (patch) | |
| tree | 32fcb3d3e466fc419fad2d3717956a5b5ad3d35a /net/unix/af_unix.c | |
| parent | 3a3b7ce9336952ea7b9564d976d068a238976c9d (diff) | |
| parent | 58e20d8d344b0ee083febb18c2b021d2427e56ca (diff) | |
| download | linux-2b828925652340277a889cbc11b2d0637f7cdaf7.tar.gz linux-2b828925652340277a889cbc11b2d0637f7cdaf7.tar.bz2 linux-2b828925652340277a889cbc11b2d0637f7cdaf7.zip | |
Merge branch 'master' into next
Conflicts:
security/keys/internal.h
security/keys/process_keys.c
security/keys/request_key.c
Fixed conflicts above by using the non 'tsk' versions.
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'net/unix/af_unix.c')
| -rw-r--r-- | net/unix/af_unix.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 338c1aec7089..2775acbca199 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1301,14 +1301,23 @@ static void unix_destruct_fds(struct sk_buff *skb) sock_wfree(skb); } -static void unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb) +static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb) { int i; + + /* + * Need to duplicate file references for the sake of garbage + * collection. Otherwise a socket in the fps might become a + * candidate for GC while the skb is not yet queued. + */ + UNIXCB(skb).fp = scm_fp_dup(scm->fp); + if (!UNIXCB(skb).fp) + return -ENOMEM; + for (i=scm->fp->count-1; i>=0; i--) unix_inflight(scm->fp->fp[i]); - UNIXCB(skb).fp = scm->fp; skb->destructor = unix_destruct_fds; - scm->fp = NULL; + return 0; } /* @@ -1367,8 +1376,11 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock, goto out; memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred)); - if (siocb->scm->fp) - unix_attach_fds(siocb->scm, skb); + if (siocb->scm->fp) { + err = unix_attach_fds(siocb->scm, skb); + if (err) + goto out_free; + } unix_get_secdata(siocb->scm, skb); skb_reset_transport_header(skb); @@ -1537,8 +1549,13 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock, size = min_t(int, size, skb_tailroom(skb)); memcpy(UNIXCREDS(skb), &siocb->scm->creds, sizeof(struct ucred)); - if (siocb->scm->fp) - unix_attach_fds(siocb->scm, skb); + if (siocb->scm->fp) { + err = unix_attach_fds(siocb->scm, skb); + if (err) { + kfree_skb(skb); + goto out_err; + } + } if ((err = memcpy_fromiovec(skb_put(skb,size), msg->msg_iov, size)) != 0) { kfree_skb(skb); |