![Thomas Petazzoni](/assets/img/avatar_default.png)
The issue was simply that the patch from Max Filippov forgot to include <limits.h> to get the definition of UCHAR_MAX. Fixes: http://autobuild.buildroot.org/results/bd1/bd120ada4830fda3db96da945513d4f6f7b2d419/ and lots of similar build failures. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
46 lines
1.2 KiB
Diff
46 lines
1.2 KiB
Diff
Subject: restrict value range passed to isprint function
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According to C standards isprint argument shall be representable as an
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unsigned char or be equal to EOF, otherwise the behaviour is undefined.
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Passing arbitrary ints leads to segfault in nm program from elfutils.
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Restrict isprint argument range to values representable by unsigned char.
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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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---
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Index: b/argp.h
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===================================================================
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--- a/argp.h
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+++ b/argp.h
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@@ -23,6 +23,7 @@
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#include <stdio.h>
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#include <ctype.h>
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+#include <limits.h>
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#define __need_error_t
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#include <errno.h>
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@@ -577,7 +578,7 @@
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else
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{
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int __key = __opt->key;
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- return __key > 0 && isprint (__key);
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+ return __key > 0 && __key <= UCHAR_MAX && isprint (__key);
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}
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}
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Index: b/argp-parse.c
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===================================================================
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--- a/argp-parse.c
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+++ b/argp-parse.c
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@@ -1292,7 +1292,7 @@
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int __key = __opt->key;
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/* FIXME: whether or not a particular key implies a short option
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* ought not to be locale dependent. */
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- return __key > 0 && isprint (__key);
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+ return __key > 0 && __key <= UCHAR_MAX && isprint (__key);
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}
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}
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