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* [Bug dynamic-link/15465] New: LD_DEBUG=symbols crashes when program name is not available @ 2013-05-14 9:52 siddhesh at redhat dot com 2013-05-14 9:57 ` [Bug dynamic-link/15465] " siddhesh at redhat dot com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: siddhesh at redhat dot com @ 2013-05-14 9:52 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15465 Bug #: 15465 Summary: LD_DEBUG=symbols crashes when program name is not available Product: glibc Version: unspecified Status: NEW Severity: normal Priority: P2 Component: dynamic-link AssignedTo: siddhesh@redhat.com ReportedBy: siddhesh@redhat.com Classification: Unclassified Running a program with LD_DEBUG=symbols defined may crash if the program tampers with argc and argv. Steps to Reproduce: foo.c: #include <stdio.h> #include <string.h> int main (int argc, char **argv) { argv[0] = argv[1]; argc--; foo (); } foo-lib.c: void foo (void) { return; } cc -o foo-lib.so -shared -fPIC foo-lib.c cc -o foo foo.c ./foo-lib.so LD_DEBUG=symbols ./foo Actual Results: Segfault Expected Results: No segfault. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug dynamic-link/15465] LD_DEBUG=symbols crashes when program name is not available 2013-05-14 9:52 [Bug dynamic-link/15465] New: LD_DEBUG=symbols crashes when program name is not available siddhesh at redhat dot com @ 2013-05-14 9:57 ` siddhesh at redhat dot com 2013-05-29 16:06 ` siddhesh at redhat dot com 2014-06-13 17:49 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: siddhesh at redhat dot com @ 2013-05-14 9:57 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15465 Siddhesh Poyarekar <siddhesh at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug dynamic-link/15465] LD_DEBUG=symbols crashes when program name is not available 2013-05-14 9:52 [Bug dynamic-link/15465] New: LD_DEBUG=symbols crashes when program name is not available siddhesh at redhat dot com 2013-05-14 9:57 ` [Bug dynamic-link/15465] " siddhesh at redhat dot com @ 2013-05-29 16:06 ` siddhesh at redhat dot com 2014-06-13 17:49 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: siddhesh at redhat dot com @ 2013-05-29 16:06 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15465 Siddhesh Poyarekar <siddhesh at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #1 from Siddhesh Poyarekar <siddhesh at redhat dot com> --- Fixed in master: commit b937534868c8d7aec3b6d645bf5fd657bbfccd42 Author: Siddhesh Poyarekar <siddhesh@redhat.com> Date: Wed May 29 21:30:20 2013 +0530 Avoid crashing in LD_DEBUG when program name is unavailable Resolves: #15465 The program name may be unavailable if the user application tampers with argc and argv[]. Some parts of the dynamic linker caters for this while others don't, so this patch consolidates the check and fallback into a single macro and updates all users. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug dynamic-link/15465] LD_DEBUG=symbols crashes when program name is not available 2013-05-14 9:52 [Bug dynamic-link/15465] New: LD_DEBUG=symbols crashes when program name is not available siddhesh at redhat dot com 2013-05-14 9:57 ` [Bug dynamic-link/15465] " siddhesh at redhat dot com 2013-05-29 16:06 ` siddhesh at redhat dot com @ 2014-06-13 17:49 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 17:49 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15465 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-06-13 17:49 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-05-14 9:52 [Bug dynamic-link/15465] New: LD_DEBUG=symbols crashes when program name is not available siddhesh at redhat dot com 2013-05-14 9:57 ` [Bug dynamic-link/15465] " siddhesh at redhat dot com 2013-05-29 16:06 ` siddhesh at redhat dot com 2014-06-13 17:49 ` fweimer at redhat dot com
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