git: c178bc193490 - stable/14 - TCP BBR: fix integer overflow

[Michael Tuexen]

The branch stable/14 has been updated by tuexen:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=c178bc1934901cf825c813bed2f3559c4e35dff7

commit c178bc1934901cf825c813bed2f3559c4e35dff7
Author:     Michael Tuexen <tue...@freebsd.org>
AuthorDate: 2025-01-03 18:44:43 +0000
Commit:     Michael Tuexen <tue...@freebsd.org>
CommitDate: 2025-02-05 09:46:22 +0000

    TCP BBR: fix integer overflow
    
    Use 64-bit arithmetic.
    
    Reviewed by:            rrs
    CID:                    1523806
    Sponsored by:           Netflix, Inc.
    Differential Revision:  https://reviews.freebsd.org/D48302
    
    (cherry picked from commit 88766e7af52bbde32b14ad48fb76798a3ba4650c)
---
 sys/netinet/tcp_stacks/bbr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c
index 762fb53fcdd7..1d030230748f 100644
--- a/sys/netinet/tcp_stacks/bbr.c
+++ b/sys/netinet/tcp_stacks/bbr.c
@@ -3842,7 +3842,7 @@ bbr_post_recovery(struct tcpcb *tp)
                else if (bbr->r_ctl.rc_delivered == 0)
                        lr2use = 1000;
                else {
-                       lr2use = bbr->r_ctl.rc_lost * 1000;
+                       lr2use = (uint64_t)bbr->r_ctl.rc_lost * (uint64_t)1000;
                        lr2use /= bbr->r_ctl.rc_delivered;
                }
                lr2use += bbr->r_ctl.recovery_lr;