lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sctp: Fix kernel panic while process protocol violation parameter

Browse Source 
Since call to function sctp_sf_abort_violation() need paramter 'arg' with
'struct sctp_chunk' type, it will read the chunk type and chunk length from
the chunk_hdr member of chunk. But call to sctp_sf_violation_paramlen()
always with 'struct sctp_paramhdr' type's parameter, it will be passed to
sctp_sf_abort_violation(). This may cause kernel panic.

   sctp_sf_violation_paramlen()
     |-- sctp_sf_abort_violation()
        |-- sctp_make_abort_violation()

This patch fixed this problem. This patch also fix two place which called
sctp_sf_violation_paramlen() with wrong paramter type.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Yongjun
2008-09-30 05:32:24 -07:00
committed by David S. Miller
parent 8b122efd13
commit ba0166708e
3 changed files with 64 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
net/sctp/sm_make_chunk.c
View File

@@ -1012,6 +1012,29 @@ end:
return retval;
}
struct sctp_chunk *sctp_make_violation_paramlen(
const struct sctp_association *asoc,
const struct sctp_chunk *chunk,
struct sctp_paramhdr *param)
{
struct sctp_chunk *retval;
static const char error[] = "The following parameter had invalid length:";
size_t payload_len = sizeof(error) + sizeof(sctp_errhdr_t) +
sizeof(sctp_paramhdr_t);
retval = sctp_make_abort(asoc, chunk, payload_len);
if (!retval)
goto nodata;
sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION,
sizeof(error) + sizeof(sctp_paramhdr_t));
sctp_addto_chunk(retval, sizeof(error), error);
sctp_addto_param(retval, sizeof(sctp_paramhdr_t), param);
nodata:
return retval;
}
/* Make a HEARTBEAT chunk. */
struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *asoc,
const struct sctp_transport *transport,
@@ -1782,11 +1805,6 @@ static int sctp_process_inv_paramlength(const struct sctp_association *asoc,
const struct sctp_chunk *chunk,
struct sctp_chunk **errp)
{
static const char error[] = "The following parameter had invalid length:";
size_t payload_len = WORD_ROUND(sizeof(error)) +
sizeof(sctp_paramhdr_t);
/* This is a fatal error. Any accumulated non-fatal errors are
* not reported.
*/
@@ -1794,14 +1812,7 @@ static int sctp_process_inv_paramlength(const struct sctp_association *asoc,
sctp_chunk_free(*errp);
/* Create an error chunk and fill it in with our payload. */
*errp = sctp_make_op_error_space(asoc, chunk, payload_len);
if (*errp) {
sctp_init_cause(*errp, SCTP_ERROR_PROTO_VIOLATION,
sizeof(error) + sizeof(sctp_paramhdr_t));
sctp_addto_chunk(*errp, sizeof(error), error);
sctp_addto_param(*errp, sizeof(sctp_paramhdr_t), param);
}
*errp = sctp_make_violation_paramlen(asoc, chunk, param);
return 0;
}