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* [Bug libc/11901] New: __libc_message(do_abort = 1) will deadlock if called from malloc
@ 2010-08-10 18:00 ajax at redhat dot com
2010-08-10 18:01 ` [Bug libc/11901] " ajax at redhat dot com
0 siblings, 1 reply; 6+ messages in thread
From: ajax at redhat dot com @ 2010-08-10 18:00 UTC (permalink / raw)
To: glibc-bugs
... because it calls malloc itself. It does this because it wants to preserve
the abort message in __abort_msg, which is noble enough, but deadlocking instead
of aborting is certainly not the intended result.
--
Summary: __libc_message(do_abort = 1) will deadlock if called
from malloc
Product: glibc
Version: 2.13
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: ajax at redhat dot com
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11901
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* [Bug libc/11901] __libc_message(do_abort = 1) will deadlock if called from malloc
2010-08-10 18:00 [Bug libc/11901] New: __libc_message(do_abort = 1) will deadlock if called from malloc ajax at redhat dot com
@ 2010-08-10 18:01 ` ajax at redhat dot com
0 siblings, 0 replies; 6+ messages in thread
From: ajax at redhat dot com @ 2010-08-10 18:01 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From ajax at redhat dot com 2010-08-10 18:01 -------
Created an attachment (id=4923)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=4923&action=view)
glibc-abort-deadlock-fix.patch
Allocate with sbrk instead. This will leak if we call __libc_message() to
abort more than once, but there's not a lot to be done about that.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11901
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* [Bug libc/11901] __libc_message(do_abort = 1) will deadlock if called from malloc
[not found] <bug-11901-131@http.sourceware.org/bugzilla/>
` (2 preceding siblings ...)
2011-05-15 4:36 ` drepper.fsp at gmail dot com
@ 2014-06-30 8:18 ` fweimer at redhat dot com
3 siblings, 0 replies; 6+ messages in thread
From: fweimer at redhat dot com @ 2014-06-30 8:18 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=11901
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug libc/11901] __libc_message(do_abort = 1) will deadlock if called from malloc
[not found] <bug-11901-131@http.sourceware.org/bugzilla/>
2011-03-02 19:34 ` walters at verbum dot org
2011-03-02 20:14 ` walters at verbum dot org
@ 2011-05-15 4:36 ` drepper.fsp at gmail dot com
2014-06-30 8:18 ` fweimer at redhat dot com
3 siblings, 0 replies; 6+ messages in thread
From: drepper.fsp at gmail dot com @ 2011-05-15 4:36 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=11901
Ulrich Drepper <drepper.fsp at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #4 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-05-15 04:35:28 UTC ---
I checked in a patch.
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* [Bug libc/11901] __libc_message(do_abort = 1) will deadlock if called from malloc
[not found] <bug-11901-131@http.sourceware.org/bugzilla/>
2011-03-02 19:34 ` walters at verbum dot org
@ 2011-03-02 20:14 ` walters at verbum dot org
2011-05-15 4:36 ` drepper.fsp at gmail dot com
2014-06-30 8:18 ` fweimer at redhat dot com
3 siblings, 0 replies; 6+ messages in thread
From: walters at verbum dot org @ 2011-03-02 20:14 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=11901
--- Comment #3 from Colin <walters at verbum dot org> 2011-03-02 20:14:39 UTC ---
See also:
https://bugzilla.redhat.com/show_bug.cgi?id=618743#c6
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* [Bug libc/11901] __libc_message(do_abort = 1) will deadlock if called from malloc
[not found] <bug-11901-131@http.sourceware.org/bugzilla/>
@ 2011-03-02 19:34 ` walters at verbum dot org
2011-03-02 20:14 ` walters at verbum dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: walters at verbum dot org @ 2011-03-02 19:34 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=11901
Colin <walters at verbum dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |walters at verbum dot org
--- Comment #2 from Colin <walters at verbum dot org> 2011-03-02 19:34:03 UTC ---
A few thoughts on this:
* Potentially add another argument to _libc_fatal which says whether or not we
can use malloc?
* Will calling sbrk confuse malloc if the program happens to catch SIGABRT?
* Use alloca instead of malloc if the buffer is "small"? Actually, how about
always using alloca, and truncating the message to say 1024 characters?
* Why are there duplicate copies of libc_fatal.c in the tree?
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end of thread, other threads:[~2014-06-30 8:18 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-08-10 18:00 [Bug libc/11901] New: __libc_message(do_abort = 1) will deadlock if called from malloc ajax at redhat dot com
2010-08-10 18:01 ` [Bug libc/11901] " ajax at redhat dot com
[not found] <bug-11901-131@http.sourceware.org/bugzilla/>
2011-03-02 19:34 ` walters at verbum dot org
2011-03-02 20:14 ` walters at verbum dot org
2011-05-15 4:36 ` drepper.fsp at gmail dot com
2014-06-30 8:18 ` fweimer at redhat dot com
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