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| author | Allan Stephens <allan.stephens@windriver.com> | 2006-06-29 12:32:46 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-29 17:08:10 -0700 |
| commit | e49060c7cab6ca856d048e1e10d71c0e6fedf376 (patch) | |
| tree | 20b3ebd30b8cc645684c369e42c968276411e7d2 /net/tipc | |
| parent | caf430f37119af5faac9252ec4e18cb1c55dde26 (diff) | |
| download | blackbird-op-linux-e49060c7cab6ca856d048e1e10d71c0e6fedf376.tar.gz blackbird-op-linux-e49060c7cab6ca856d048e1e10d71c0e6fedf376.zip | |
[TIPC]: Fixed skb_under_panic caused by tipc_link_bundle_buf
Now determines tailroom of bundle buffer by directly inspection of buffer.
Previously, buffer was assumed to have a max capacity equal to the link MTU,
but the addition of link MTU negotiation means that the link MTU can increase
after the bundle buffer is allocated.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/link.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index d64658053746..c6831c75cfa4 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -2,7 +2,7 @@ * net/tipc/link.c: TIPC link code * * Copyright (c) 1996-2006, Ericsson AB - * Copyright (c) 2004-2005, Wind River Systems + * Copyright (c) 2004-2006, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -988,17 +988,18 @@ static int link_bundle_buf(struct link *l_ptr, struct tipc_msg *bundler_msg = buf_msg(bundler); struct tipc_msg *msg = buf_msg(buf); u32 size = msg_size(msg); - u32 to_pos = align(msg_size(bundler_msg)); - u32 rest = link_max_pkt(l_ptr) - to_pos; + u32 bundle_size = msg_size(bundler_msg); + u32 to_pos = align(bundle_size); + u32 pad = to_pos - bundle_size; if (msg_user(bundler_msg) != MSG_BUNDLER) return 0; if (msg_type(bundler_msg) != OPEN_MSG) return 0; - if (rest < align(size)) + if (skb_tailroom(bundler) < (pad + size)) return 0; - skb_put(bundler, (to_pos - msg_size(bundler_msg)) + size); + skb_put(bundler, pad + size); memcpy(bundler->data + to_pos, buf->data, size); msg_set_size(bundler_msg, to_pos + size); msg_set_msgcnt(bundler_msg, msg_msgcnt(bundler_msg) + 1); |
