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bonding: fix send_peer_notif overflow 

[ Upstream commit 9949e2efb5 ]

Bonding send_peer_notif was defined as u8. Since commit 07a4ddec3c
("bonding: add an option to specify a delay between peer notifications").
the bond->send_peer_notif will be num_peer_notif multiplied by
peer_notif_delay, which is u8 * u32. This would cause the send_peer_notif
overflow easily. e.g.

  ip link add bond0 type bond mode 1 miimon 100 num_grat_arp 30 peer_notify_delay 1000

To fix the overflow, let's set the send_peer_notif to u32 and limit
peer_notif_delay to 300s.

Reported-by: Liang Li <liali@redhat.com>
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2090053
Fixes: 07a4ddec3c ("bonding: add an option to specify a delay between peer notifications")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hangbin Liu 2023-05-09 11:11:57 +08:00 committed by Greg Kroah-Hartman
parent d9176dc690
commit 6b4585a3c9
3 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/bonding/bond_netlink.c
View File

@ -84,6 +84,11 @@ nla_put_failure:
return -EMSGSIZE;
}
/* Limit the max delay range to 300s */
static struct netlink_range_validation delay_range = {
.max = 300000,
};
static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
[IFLA_BOND_MODE] = { .type = NLA_U8 },
[IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 },
@ -114,7 +119,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
[IFLA_BOND_AD_ACTOR_SYSTEM] = { .type = NLA_BINARY,
.len = ETH_ALEN },
[IFLA_BOND_TLB_DYNAMIC_LB] = { .type = NLA_U8 },
[IFLA_BOND_PEER_NOTIF_DELAY] = { .type = NLA_U32 },
[IFLA_BOND_PEER_NOTIF_DELAY] = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range),
[IFLA_BOND_MISSED_MAX] = { .type = NLA_U8 },
[IFLA_BOND_NS_IP6_TARGET] = { .type = NLA_NESTED },
};

8
drivers/net/bonding/bond_options.c
View File

@ -169,6 +169,12 @@ static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {
{ "off", 0, 0},
{ "maxval", 300000, BOND_VALFLAG_MAX},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_primary_reselect_tbl[] = {
{ "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
{ "better", BOND_PRI_RESELECT_BETTER, 0},
@ -488,7 +494,7 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = {
.id = BOND_OPT_PEER_NOTIF_DELAY,
.name = "peer_notif_delay",
.desc = "Delay between each peer notification on failover event, in milliseconds",
.values = bond_intmax_tbl,
.values = bond_peer_notif_delay_tbl,
.set = bond_option_peer_notif_delay_set
}
};

2
include/net/bonding.h
View File

@ -235,7 +235,7 @@ struct bonding {
*/
spinlock_t mode_lock;
spinlock_t stats_lock;
u8 send_peer_notif;
u32 send_peer_notif;
u8 igmp_retrans;
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_entry;