[PATCH iproute2 v2] ip link: Fix crash on older kernels when show VF dev
From: Vadim Kochan <hidden>
Date: 2015-01-09 19:32:59
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Vadim Kochan <redacted> The issue was caused that ifla_vf_rate does not exist on older kernels and should be checked if it exists as nested attr. Signed-off-by: Vadim Kochan <redacted> Reported-by: William Dauchy <redacted> Tested-by: William Dauchy <redacted> --- ip/ipaddress.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 28dfe8c..830b166 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c@@ -259,11 +259,10 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo) { struct ifla_vf_mac *vf_mac; struct ifla_vf_vlan *vf_vlan; - struct ifla_vf_rate *vf_rate; struct ifla_vf_tx_rate *vf_tx_rate; struct ifla_vf_spoofchk *vf_spoofchk; struct ifla_vf_link_state *vf_linkstate; - struct rtattr *vf[IFLA_VF_MAX+1]; + struct rtattr *vf[IFLA_VF_MAX + 1] = {}; struct rtattr *tmp; SPRINT_BUF(b1);
@@ -277,7 +276,6 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo) vf_mac = RTA_DATA(vf[IFLA_VF_MAC]); vf_vlan = RTA_DATA(vf[IFLA_VF_VLAN]); vf_tx_rate = RTA_DATA(vf[IFLA_VF_TX_RATE]); - vf_rate = RTA_DATA(vf[IFLA_VF_RATE]); /* Check if the spoof checking vf info type is supported by * this kernel.
@@ -313,10 +311,16 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo) fprintf(fp, ", qos %d", vf_vlan->qos); if (vf_tx_rate->rate) fprintf(fp, ", tx rate %d (Mbps)", vf_tx_rate->rate); - if (vf_rate->max_tx_rate) - fprintf(fp, ", max_tx_rate %dMbps", vf_rate->max_tx_rate); - if (vf_rate->min_tx_rate) - fprintf(fp, ", min_tx_rate %dMbps", vf_rate->min_tx_rate); + + if (vf[IFLA_VF_RATE]) { + struct ifla_vf_rate *vf_rate = RTA_DATA(vf[IFLA_VF_RATE]); + + if (vf_rate->max_tx_rate) + fprintf(fp, ", max_tx_rate %dMbps", vf_rate->max_tx_rate); + if (vf_rate->min_tx_rate) + fprintf(fp, ", min_tx_rate %dMbps", vf_rate->min_tx_rate); + } + if (vf_spoofchk && vf_spoofchk->setting != -1) { if (vf_spoofchk->setting) fprintf(fp, ", spoof checking on");
--
2.1.3