diff options
Diffstat (limited to 'source/n/wpa_supplicant/patches/rh1451834-nl80211-Fix-race-condition-in-detecting-MAC-change.patch')
| -rw-r--r-- | source/n/wpa_supplicant/patches/rh1451834-nl80211-Fix-race-condition-in-detecting-MAC-change.patch | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/source/n/wpa_supplicant/patches/rh1451834-nl80211-Fix-race-condition-in-detecting-MAC-change.patch b/source/n/wpa_supplicant/patches/rh1451834-nl80211-Fix-race-condition-in-detecting-MAC-change.patch deleted file mode 100644 index 0c03e1dc..00000000 --- a/source/n/wpa_supplicant/patches/rh1451834-nl80211-Fix-race-condition-in-detecting-MAC-change.patch +++ /dev/null @@ -1,99 +0,0 @@ -From 290834df69556b903b49f2a45671cc62b44f13bb Mon Sep 17 00:00:00 2001 -From: Beniamino Galvani <bgalvani@redhat.com> -Date: Fri, 28 Apr 2017 17:59:30 +0200 -Subject: [PATCH] nl80211: Fix race condition in detecting MAC change - -Commit 3e0272ca00ce1df35b45e7d739dd7e935f13fd84 ('nl80211: Re-read MAC -address on RTM_NEWLINK') added the detection of external changes to MAC -address when the interface is brought up. - -If the interface state is changed quickly enough, wpa_supplicant may -receive the netlink message for the !IFF_UP event when the interface -has already been brought up and would ignore the next netlink IFF_UP -message, missing the MAC change. - -Fix this by also reloading the MAC address when a !IFF_UP event is -received with the interface up, because this implies that the -interface went down and up again, possibly changing the address. - -Signed-off-by: Beniamino Galvani <bgalvani@redhat.com> ---- - src/drivers/driver_nl80211.c | 47 +++++++++++++++++++++++++------------------- - 1 file changed, 27 insertions(+), 20 deletions(-) - -diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c -index af1cb84..24fad29 100644 ---- a/src/drivers/driver_nl80211.c -+++ b/src/drivers/driver_nl80211.c -@@ -933,6 +933,30 @@ nl80211_find_drv(struct nl80211_global *global, int idx, u8 *buf, size_t len) - } - - -+static void nl80211_refresh_mac(struct wpa_driver_nl80211_data *drv, -+ int ifindex) -+{ -+ struct i802_bss *bss; -+ u8 addr[ETH_ALEN]; -+ -+ bss = get_bss_ifindex(drv, ifindex); -+ if (bss && -+ linux_get_ifhwaddr(drv->global->ioctl_sock, -+ bss->ifname, addr) < 0) { -+ wpa_printf(MSG_DEBUG, -+ "nl80211: %s: failed to re-read MAC address", -+ bss->ifname); -+ } else if (bss && os_memcmp(addr, bss->addr, ETH_ALEN) != 0) { -+ wpa_printf(MSG_DEBUG, -+ "nl80211: Own MAC address on ifindex %d (%s) changed from " -+ MACSTR " to " MACSTR, -+ ifindex, bss->ifname, -+ MAC2STR(bss->addr), MAC2STR(addr)); -+ os_memcpy(bss->addr, addr, ETH_ALEN); -+ } -+} -+ -+ - static void wpa_driver_nl80211_event_rtm_newlink(void *ctx, - struct ifinfomsg *ifi, - u8 *buf, size_t len) -@@ -997,6 +1021,8 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx, - namebuf[0] = '\0'; - if (if_indextoname(ifi->ifi_index, namebuf) && - linux_iface_up(drv->global->ioctl_sock, namebuf) > 0) { -+ /* Re-read MAC address as it may have changed */ -+ nl80211_refresh_mac(drv, ifi->ifi_index); - wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down " - "event since interface %s is up", namebuf); - drv->ignore_if_down_event = 0; -@@ -1044,27 +1070,8 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx, - "event since interface %s is marked " - "removed", drv->first_bss->ifname); - } else { -- struct i802_bss *bss; -- u8 addr[ETH_ALEN]; -- - /* Re-read MAC address as it may have changed */ -- bss = get_bss_ifindex(drv, ifi->ifi_index); -- if (bss && -- linux_get_ifhwaddr(drv->global->ioctl_sock, -- bss->ifname, addr) < 0) { -- wpa_printf(MSG_DEBUG, -- "nl80211: %s: failed to re-read MAC address", -- bss->ifname); -- } else if (bss && -- os_memcmp(addr, bss->addr, ETH_ALEN) != 0) { -- wpa_printf(MSG_DEBUG, -- "nl80211: Own MAC address on ifindex %d (%s) changed from " -- MACSTR " to " MACSTR, -- ifi->ifi_index, bss->ifname, -- MAC2STR(bss->addr), -- MAC2STR(addr)); -- os_memcpy(bss->addr, addr, ETH_ALEN); -- } -+ nl80211_refresh_mac(drv, ifi->ifi_index); - - wpa_printf(MSG_DEBUG, "nl80211: Interface up"); - drv->if_disabled = 0; --- -2.9.3 - |