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From e27b06773eaf5c0307bcc5637d7457be9be1e6ea Mon Sep 17 00:00:00 2001
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From: Eugene Syromyatnikov <evgsyr@gmail.com>
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Date: Wed, 1 Dec 2021 17:11:02 +0100
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Subject: [PATCH] print_ifindex: fix IFNAME_QUOTED_SZ definition
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sizeof(IFNAMSIZ) instead of IFNAMSIZ was mistakenly used
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for IFNAME_QUOTED_SZ initial definition in commit v4.23~87
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"print_ifindex: respect xlat style settings".
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* src/print_ifindex.c (IFNAME_QUOTED_SZ): Use IFNAMSIZ
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instead of sizeof(IFNAMSIZ).
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* NEWS: Mention it.
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Reported-by: Paulo Andrade <pandrade@redhat.com>
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Suggested-by: Paulo Andrade <pandrade@redhat.com>
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Fixes: v4.23~87 "print_ifindex: respect xlat style settings"
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References: https://bugzilla.redhat.com/show_bug.cgi?id=2028146
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---
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NEWS | 4 ++++
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src/print_ifindex.c | 2 +-
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2 files changed, 5 insertions(+), 1 deletion(-)
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diff --git a/NEWS b/NEWS
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index 9bab673..a3036b8 100644
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--- a/NEWS
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+++ b/NEWS
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@@ -16,6 +16,12 @@ Noteworthy changes in release ?.?? (????-??-??)
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PTRACE_*, RTM_*, RTPROT_*, TRAP_*, UFFD_*, UFFDIO_*, and V4L2_* constants.
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* Updated lists of ioctl commands from Linux 5.13.
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+ * Bug fixes
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+ * Fixed insufficient buffer size used for network interface name printing,
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+ that previously led to assertions on attempts of printing interface names
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+ that require quoting, for example, names longer than 4 characters in -xx
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+ mode (addresses RHBZ bug #2028146).
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+
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* Portability
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* On powerpc and powerpc64, linux kernel >= 2.6.23 is required.
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Older versions without a decent PTRACE_GETREGS support will not work.
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diff --git a/src/print_ifindex.c b/src/print_ifindex.c
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index ec48093..dc9d592 100644
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--- a/src/print_ifindex.c
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+++ b/src/print_ifindex.c
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@@ -13,7 +13,7 @@
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# define INI_PFX "if_nametoindex(\""
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# define INI_SFX "\")"
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-# define IFNAME_QUOTED_SZ (sizeof(IFNAMSIZ) * 4 + 3)
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+# define IFNAME_QUOTED_SZ (IFNAMSIZ * 4 + 3)
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const char *
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get_ifname(const unsigned int ifindex)
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--
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2.1.4
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