* [Bug dynamic-link/16971] SEGV in do_sym
[not found] <bug-16971-131@http.sourceware.org/bugzilla/>
@ 2014-05-21 8:08 ` schwab@linux-m68k.org
2014-05-21 8:35 ` ma.jiang at zte dot com.cn
` (3 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: schwab@linux-m68k.org @ 2014-05-21 8:08 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16971
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
Severity|critical |normal
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Please provide a complete test case. I cannot reproduce that, there is always
at least _dl_main_map.
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[not found] <bug-16971-131@http.sourceware.org/bugzilla/>
2014-05-21 8:08 ` [Bug dynamic-link/16971] SEGV in do_sym schwab@linux-m68k.org
@ 2014-05-21 8:35 ` ma.jiang at zte dot com.cn
2014-05-21 9:20 ` ma.jiang at zte dot com.cn
` (2 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: ma.jiang at zte dot com.cn @ 2014-05-21 8:35 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16971
--- Comment #2 from ma.jiang at zte dot com.cn ---
(In reply to Andreas Schwab from comment #1)
> Please provide a complete test case. I cannot reproduce that, there is
> always at least _dl_main_map.
I can use this code to reproduce the bug on MIPS(qemu).
#include <dlfcn.h>
#include <stdio.h>
int main()
{
void *x = dlsym(NULL, "_r_debug");
return 0;
}
I can reproduce this bug on glibc-2.13, currently I can not got a latest mips
glibc. Sorry if this bug has got fixed elsewhere.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug dynamic-link/16971] SEGV in do_sym
[not found] <bug-16971-131@http.sourceware.org/bugzilla/>
2014-05-21 8:08 ` [Bug dynamic-link/16971] SEGV in do_sym schwab@linux-m68k.org
2014-05-21 8:35 ` ma.jiang at zte dot com.cn
@ 2014-05-21 9:20 ` ma.jiang at zte dot com.cn
2014-06-12 19:16 ` fweimer at redhat dot com
2014-06-12 19:16 ` fweimer at redhat dot com
4 siblings, 0 replies; 5+ messages in thread
From: ma.jiang at zte dot com.cn @ 2014-05-21 9:20 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16971
ma.jiang at zte dot com.cn changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from ma.jiang at zte dot com.cn ---
(In reply to ma.jiang from comment #2)
> (In reply to Andreas Schwab from comment #1)
> > Please provide a complete test case. I cannot reproduce that, there is
> > always at least _dl_main_map.
>
> I can use this code to reproduce the bug on MIPS(qemu).
>
> #include <dlfcn.h>
> #include <stdio.h>
> int main()
> {
>
> void *x = dlsym(NULL, "_r_debug");
> return 0;
> }
>
> I can reproduce this bug on glibc-2.13, currently I can not got a latest
> mips glibc. Sorry if this bug has got fixed elsewhere.
This bug is fixed in dl-support.c.
/* Namespace information. */
struct link_namespaces _dl_ns[DL_NNS] =
{
[LM_ID_BASE] =
{
._ns_loaded = &_dl_main_map,
._ns_nloaded = 1,
._ns_main_searchlist = &_dl_main_map.l_searchlist,
}
};
After adding the dummy link map, checking the match in do_sym is not
necessary.Sorry for the trouble I have make.
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[not found] <bug-16971-131@http.sourceware.org/bugzilla/>
` (2 preceding siblings ...)
2014-05-21 9:20 ` ma.jiang at zte dot com.cn
@ 2014-06-12 19:16 ` fweimer at redhat dot com
2014-06-12 19:16 ` fweimer at redhat dot com
4 siblings, 0 replies; 5+ messages in thread
From: fweimer at redhat dot com @ 2014-06-12 19:16 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16971
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
Flags| |security-
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[not found] <bug-16971-131@http.sourceware.org/bugzilla/>
` (3 preceding siblings ...)
2014-06-12 19:16 ` fweimer at redhat dot com
@ 2014-06-12 19:16 ` fweimer at redhat dot com
4 siblings, 0 replies; 5+ messages in thread
From: fweimer at redhat dot com @ 2014-06-12 19:16 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16971
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|fweimer at redhat dot com |
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