grub2/backport-0029-net-Remove-variables-hooks-when-interface-is-unregis.patch
Qiumiao Zhang 74f9c62794 fix the vulnerabilities announced on February 18th, 2025
Signed-off-by: Qiumiao Zhang <zhangqiumiao1@huawei.com>
(cherry picked from commit c141a13130da5dca205b607533751a6ba6c9581e)
2025-02-25 16:47:19 +08:00

88 lines
2.6 KiB
Diff

From aa8b4d7facef7b75a2703274b1b9d4e0e734c401 Mon Sep 17 00:00:00 2001
From: B Horn <b@horn.uk>
Date: Fri, 1 Nov 2024 23:49:48 +0000
Subject: [PATCH 29/73] net: Remove variables hooks when interface is
unregisted
The grub_net_network_level_interface_unregister(), previously
implemented in a header, did not remove the variables hooks that
were registered in grub_net_network_level_interface_register().
Fix this by implementing the same logic used to register the
variables and move the function into the grub-core/net/net.c.
Signed-off-by: B Horn <b@horn.uk>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
grub-core/net/net.c | 32 ++++++++++++++++++++++++++++++++
include/grub/net.h | 11 +----------
2 files changed, 33 insertions(+), 10 deletions(-)
diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index f69c67b64..0e41e21a5 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -984,6 +984,38 @@ grub_net_network_level_interface_register (struct grub_net_network_level_interfa
grub_net_network_level_interfaces = inter;
}
+void
+grub_net_network_level_interface_unregister (struct grub_net_network_level_interface *inter)
+{
+ char *name;
+
+ {
+ char buf[GRUB_NET_MAX_STR_HWADDR_LEN];
+
+ grub_net_hwaddr_to_str (&inter->hwaddress, buf);
+ name = grub_xasprintf ("net_%s_mac", inter->name);
+ if (name != NULL)
+ grub_register_variable_hook (name, NULL, NULL);
+ grub_free (name);
+ }
+
+ {
+ char buf[GRUB_NET_MAX_STR_ADDR_LEN];
+
+ grub_net_addr_to_str (&inter->address, buf);
+ name = grub_xasprintf ("net_%s_ip", inter->name);
+ if (name != NULL)
+ grub_register_variable_hook (name, NULL, NULL);
+ grub_free (name);
+ }
+
+ inter->card->num_ifaces--;
+ *inter->prev = inter->next;
+ if (inter->next)
+ inter->next->prev = inter->prev;
+ inter->next = 0;
+ inter->prev = 0;
+}
grub_err_t
grub_net_add_ipv4_local (struct grub_net_network_level_interface *inter,
diff --git a/include/grub/net.h b/include/grub/net.h
index 844e501c1..228d04963 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -540,16 +540,7 @@ void grub_bootp_fini (void);
void grub_dns_init (void);
void grub_dns_fini (void);
-static inline void
-grub_net_network_level_interface_unregister (struct grub_net_network_level_interface *inter)
-{
- inter->card->num_ifaces--;
- *inter->prev = inter->next;
- if (inter->next)
- inter->next->prev = inter->prev;
- inter->next = 0;
- inter->prev = 0;
-}
+void grub_net_network_level_interface_unregister (struct grub_net_network_level_interface *inter);
void
grub_net_tcp_retransmit (void);
--
2.33.0