git: 1de31f53f9e4 - stable/13 - sctp: don't provide uninitialized memory to process_chunk_drop()

The branch stable/13 has been updated by tuexen:

URL: https://cgit.FreeBSD.org/src/commit/?id=1de31f53f9e4f3fd9e3cf72f2cfc7d62d17bf1e7

commit 1de31f53f9e4f3fd9e3cf72f2cfc7d62d17bf1e7
Author:     Michael Tuexen <tuexen@FreeBSD.org>
AuthorDate: 2024-05-08 22:17:13 +0000
Commit:     Michael Tuexen <tuexen@FreeBSD.org>
CommitDate: 2024-08-01 20:58:51 +0000

    sctp: don't provide uninitialized memory to process_chunk_drop()
    
    Right now, the code in process_chunk_drop() does not look the
    the corresponding fields.
    Therefore, no functional change intended.
    
    Reported by:    Coverity Scan
    CID:            1472476
    
    (cherry picked from commit 83dcc7790b11e605c32ec9a091c6bba3bc921083)
---
 sys/netinet/sctp_input.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/netinet/sctp_input.c b/sys/netinet/sctp_input.c
index 7ad9eec07897..b6239b0d9ad6 100644
--- a/sys/netinet/sctp_input.c
+++ b/sys/netinet/sctp_input.c
@@ -4229,6 +4229,8 @@ sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
 				SCTP_STAT_INCR(sctps_pdrpmbda);
 			}
 		} else {
+			desc.tsn_ifany = htonl(0);
+			memset(desc.data_bytes, 0, SCTP_NUM_DB_TO_VERIFY);
 			if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
 				SCTP_STAT_INCR(sctps_pdrpmbct);
 			}