6.6-stable review patch. If anyone has any objections, please let me know.
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From: Yue Haibing yuehaibing@huawei.com
[ Upstream commit 3d95261eeb74958cd496e1875684827dc5d028cc ]
In ipv6_rpl_srh_rcv() we use min(net->ipv6.devconf_all->rpl_seg_enabled, idev->cnf.rpl_seg_enabled) is intended to return 0 when either value is zero, but if one of the values is negative it will in fact return non-zero.
Signed-off-by: Yue Haibing yuehaibing@huawei.com Link: https://patch.msgid.link/20250901123726.1972881-3-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/addrconf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 1c3b0ba289fbd..0e49ee83533b5 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -7102,7 +7102,9 @@ static const struct ctl_table addrconf_sysctl[] = { .data = &ipv6_devconf.rpl_seg_enabled, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, }, { .procname = "ioam6_enabled",