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https://github.com/crosstool-ng/crosstool-ng.git
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30 lines
777 B
Diff
30 lines
777 B
Diff
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commit 2180fee114b778515b3f560e5ff1e795282e60b0
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Author: Steve Ellcey <sellcey@caviumnetworks.com>
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Date: Wed Nov 15 08:58:48 2017 -0800
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Check length of ifname before copying it into to ifreq structure.
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[BZ #22442]
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* sysdeps/unix/sysv/linux/if_index.c (__if_nametoindex):
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Check if ifname is too long.
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---
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sysdeps/unix/sysv/linux/if_index.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/sysdeps/unix/sysv/linux/if_index.c
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+++ b/sysdeps/unix/sysv/linux/if_index.c
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@@ -44,6 +44,12 @@
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if (fd < 0)
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return 0;
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+ if (strlen (ifname) >= IFNAMSIZ)
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+ {
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+ __set_errno (ENODEV);
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+ return 0;
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+ }
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+
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strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
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if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
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{
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