diff options
| author | Henry Ptasinski <hptasinski@google.com> | 2020-09-19 03:12:11 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-21 00:15:12 +0300 |
| commit | fe81d9f6182d1160e625894eecb3d7ff0222cac5 (patch) | |
| tree | 4ea97ca4097a651dc3e032b95363b44261f0375a /include/net | |
| parent | b6e11785cf957f4f4dd7da7f5a1f41ca4f1ea913 (diff) | |
| download | linux-fe81d9f6182d1160e625894eecb3d7ff0222cac5.tar.xz | |
net: sctp: Fix IPv6 ancestor_size calc in sctp_copy_descendant
When calculating ancestor_size with IPv6 enabled, simply using
sizeof(struct ipv6_pinfo) doesn't account for extra bytes needed for
alignment in the struct sctp6_sock. On x86, there aren't any extra
bytes, but on ARM the ipv6_pinfo structure is aligned on an 8-byte
boundary so there were 4 pad bytes that were omitted from the
ancestor_size calculation. This would lead to corruption of the
pd_lobby pointers, causing an oops when trying to free the sctp
structure on socket close.
Fixes: 636d25d557d1 ("sctp: not copy sctp_sock pd_lobby in sctp_copy_descendant")
Signed-off-by: Henry Ptasinski <hptasinski@google.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/sctp/structs.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index b33f1aefad09..0bdff38eb4bb 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -226,12 +226,14 @@ struct sctp_sock { data_ready_signalled:1; atomic_t pd_mode; + + /* Fields after this point will be skipped on copies, like on accept + * and peeloff operations + */ + /* Receive to here while partial delivery is in effect. */ struct sk_buff_head pd_lobby; - /* These must be the last fields, as they will skipped on copies, - * like on accept and peeloff operations - */ struct list_head auto_asconf_list; int do_auto_asconf; }; |