From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/net/ipv4/fib_semantics.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/kernel/net/ipv4/fib_semantics.c b/kernel/net/ipv4/fib_semantics.c
index ab9fcc6..ed20d6a 100644
--- a/kernel/net/ipv4/fib_semantics.c
+++ b/kernel/net/ipv4/fib_semantics.c
@@ -30,6 +30,7 @@
#include <linux/slab.h>
#include <linux/netlink.h>
#include <linux/hash.h>
+#include <linux/nospec.h>
#include <net/arp.h>
#include <net/ip.h>
@@ -277,7 +278,8 @@
hlist_del(&nexthop_nh->nh_hash);
} endfor_nexthops(fi)
}
- fi->fib_dead = 1;
+ /* Paired with READ_ONCE() from fib_table_lookup() */
+ WRITE_ONCE(fi->fib_dead, 1);
fib_info_put(fi);
}
spin_unlock_bh(&fib_info_lock);
@@ -1021,6 +1023,7 @@
if (type > RTAX_MAX)
return false;
+ type = array_index_nospec(type, RTAX_MAX + 1);
if (type == RTAX_CC_ALGO) {
char tmp[TCP_CA_NAME_MAX];
bool ecn_ca = false;
@@ -1597,6 +1600,7 @@
link_it:
ofi = fib_find_info(fi);
if (ofi) {
+ /* fib_table_lookup() should not see @fi yet. */
fi->fib_dead = 1;
free_fib_info(fi);
ofi->fib_treeref++;
@@ -1635,6 +1639,7 @@
failure:
if (fi) {
+ /* fib_table_lookup() should not see @fi yet. */
fi->fib_dead = 1;
free_fib_info(fi);
}
--
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