Bug 486812

Summary:	Valgrind reports read errors reading a memory area that has been used as `sigaltstack` memory
Product:	[Developer tools] valgrind	Reporter:	Marco Trevisan <mail>
Component:	memcheck	Assignee:	Julian Seward <jseward>
Status:	RESOLVED WORKSFORME
Severity:	normal
Priority:	NOR
Version First Reported In:	3.22.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Marco Trevisan 2024-05-09 13:37:15 UTC

# SUMMARY

Valgrind reports read errors in the stack when such memory area has been used as `sigaltstack` memory allocation.

# STEPS TO REPRODUCE
1. Run the GLib `unix` test with --setup=valgrind

Which implies running it with this command:

/usr/bin/valgrind --tool=memcheck --error-exitcode=1 --track-origins=yes --leak-check=full --leak-resolution=high --num-callers=50 --show-leak-kinds=definite,possible --show-error-list=yes --suppressions=/data/GNOME/glib/tools/glib.supp /data/GNOME/_BUILD/glib/glib/tests/unix

# OBSERVED RESULT

The test fails with these unexpected errors

==451302== 
==451302== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==451300== Invalid read of size 8
==451300==    at 0x48514EB: bcmp (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BAF9: test_signal_alternate_stack (unix.c:594)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd518 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (unix.c:574)
==451300== 
==451300== Invalid read of size 1
==451300==    at 0x48514B9: bcmp (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BAF9: test_signal_alternate_stack (unix.c:594)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd598 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (unix.c:574)
==451300== 
==451300== Invalid write of size 8
==451300==    at 0x4851CD3: memset (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BB30: memset (string_fortified.h:59)
==451300==    by 0x10BB30: test_signal_alternate_stack (unix.c:600)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd518 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (string_fortified.h:574)
==451300== 
==451300== Invalid write of size 8
==451300==    at 0x4851CCC: memset (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BB30: memset (string_fortified.h:59)
==451300==    by 0x10BB30: test_signal_alternate_stack (unix.c:600)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd520 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (string_fortified.h:574)
==451300== 
==451300== Invalid read of size 8
==451300==    at 0x48514EB: bcmp (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BCF7: test_signal_alternate_stack (unix.c:601)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd518 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (unix.c:574)
==451300== 
==451300== Invalid read of size 8
==451300==    at 0x48514EB: bcmp (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BCA7: test_signal_alternate_stack (unix.c:607)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd518 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (unix.c:574)
==451300== 
==451300== Invalid read of size 1
==451300==    at 0x48514B9: bcmp (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==451300==    by 0x10BCA7: test_signal_alternate_stack (unix.c:607)
==451300==    by 0x48E123A: test_case_run (gtestutils.c:2988)
==451300==    by 0x48E123A: g_test_run_suite_internal (gtestutils.c:3090)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E11B2: g_test_run_suite_internal (gtestutils.c:3109)
==451300==    by 0x48E1711: g_test_run_suite (gtestutils.c:3189)
==451300==    by 0x48E1797: g_test_run (gtestutils.c:2275)
==451300==    by 0x10AAD3: main (unix.c:886)
==451300==  Address 0x1ffeffd598 is on thread 1's stack
==451300==  in frame #1, created by test_signal_alternate_stack (unix.c:574)
==451300== 
**
GLib:ERROR:../../glib/glib/tests/unix.c:607:test_signal_alternate_stack: assertion failed (stack_memory == zero_mem)


# EXPECTED RESULT

The test does not fail

---

To note that, manually looping through the stack area checking for memory changes, also valgrind reports an error when we reach to a specific point (that is not fixed):

Reading byte 2646
Reading byte 2647
Reading byte 2648
==46100== Invalid read of size 1
==46100==    at 0x1098B4: test_signal_alternate_stack (unix.c:615)
==46100==    by 0x1098B4: test_sighup_alternate_stack (unix.c:643)
==46100==    by 0x48DF23A: test_case_run (gtestutils.c:2988)
==46100==    by 0x48DF23A: g_test_run_suite_internal (gtestutils.c:3090)
==46100==    by 0x48DF1B2: g_test_run_suite_internal (gtestutils.c:3109)
==46100==    by 0x48DF1B2: g_test_run_suite_internal (gtestutils.c:3109)
==46100==    by 0x48DF711: g_test_run_suite (gtestutils.c:3189)
==46100==    by 0x48DF797: g_test_run (gtestutils.c:2275)
==46100==    by 0x1093B8: main (unix.c:915)
==46100==  Address 0x1ffeffce88 is on thread 1's stack
==46100==  in frame #0, created by test_sighup_alternate_stack (unix.c:642)
==46100== 
Reading byte 2649
Reading byte 2650
Reading byte 2651

As further note, the same issue happens also when using dynamically or mmap'ed memory areas instead.

Note that no error is happening for other sanitizers (ASAN in various in compilers), so my feeling is that this is due the way valgrind implements this.

Coming from https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4050

Comment 1 Paul Floyd 2024-05-10 06:47:56 UTC

I have a workaround - use KDE :-)

==451300==    by 0x10BB30: memset (string_fortified.h:59)

memcheck should be redirecting memset, which it expects to be in libc. Is that a fortified version that is inline in a header? Can you build a non-fortified version for testing with Valgrind.

Comment 2 Paul Floyd 2024-05-11 05:30:30 UTC

I see that you've disabled the test without even understanding the problem. That's the kind of quality that I expect from GTK.

Comment 3 Marco Trevisan 2024-05-24 17:34:45 UTC

|  I have a workaround - use KDE :-)

Well, considering many qt programs may still depend on GLib main loop I'm not sure this is a good advice.

In any case, I was considering this as a "funny" (maybe 15 years ago?) comment, but not really considering your next comment

| I see that you've disabled the test without even understanding the problem. That's the kind of quality that I expect from GTK.

Really, this is not helping at all. We want to definitely help valgrind to handle this case or to fix it in our side if that's really a problem, but I don't think that's the way...

However if you read the code properly, the test has not been disabled at all, the test is still running in valgrind, what we disabled is a memory check that was failing but that isn't really affecting what the purpose of the test was. And we did it because we couldn't rely on an error that so far no other analyzer underlined.

However... This is the trace without fortified sources:

==32420== 
==32420== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x4033B5: test_signal_alternate_stack (unix.c:619)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid read of size 1
==32417==    at 0x484E959: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x4033B5: test_signal_alternate_stack (unix.c:619)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffef28 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid write of size 8
==32417==    at 0x484F173: memset (vg_replace_strmem.c:1386)
==32417==    by 0x4033EB: test_signal_alternate_stack (unix.c:625)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid write of size 8
==32417==    at 0x484F16C: memset (vg_replace_strmem.c:1386)
==32417==    by 0x4033EB: test_signal_alternate_stack (unix.c:625)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeeb0 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40349D: test_signal_alternate_stack (unix.c:626)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40346E: test_signal_alternate_stack (unix.c:632)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== Invalid read of size 1
==32417==    at 0x484E959: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40346E: test_signal_alternate_stack (unix.c:632)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffef28 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
**
GLib:ERROR:../../GNOME/glib/glib/tests/unix.c:632:test_signal_alternate_stack: assertion failed (stack_memory == zero_mem)
==32417== 
==32417== Process terminating with default action of signal 6 (SIGABRT): dumping core
==32417==    at 0x4A31834: __pthread_kill_implementation (pthread_kill.c:44)
==32417==    by 0x49DF8ED: raise (raise.c:26)
==32417==    by 0x49C78FE: abort (abort.c:79)
==32417==    by 0x4875064: g_assertion_message.cold (gtestutils.c:3331)
==32417==    by 0x4036CE: test_signal_alternate_stack (unix.c:632)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417== 
==32417== HEAP SUMMARY:
==32417==     in use at exit: 35,316 bytes in 153 blocks
==32417==   total heap usage: 1,252 allocs, 1,099 frees, 1,706,851 bytes allocated
==32417== 
==32417== LEAK SUMMARY:
==32417==    definitely lost: 0 bytes in 0 blocks
==32417==    indirectly lost: 0 bytes in 0 blocks
==32417==      possibly lost: 0 bytes in 0 blocks
==32417==    still reachable: 13,199 bytes in 139 blocks
==32417==         suppressed: 22,117 bytes in 14 blocks
==32417== Reachable blocks (those to which a pointer was found) are not shown.
==32417== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==32417== 
==32417== ERROR SUMMARY: 1042 errors from 7 contexts (suppressed: 1 from 1)
==32417== 
==32417== 1 errors in context 1 of 7:
==32417== Invalid read of size 1
==32417==    at 0x484E959: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40346E: test_signal_alternate_stack (unix.c:632)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffef28 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 1 errors in context 2 of 7:
==32417== Invalid read of size 1
==32417==    at 0x484E959: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x4033B5: test_signal_alternate_stack (unix.c:619)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffef28 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 17 errors in context 3 of 7:
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40346E: test_signal_alternate_stack (unix.c:632)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 17 errors in context 4 of 7:
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x4033B5: test_signal_alternate_stack (unix.c:619)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 251 errors in context 5 of 7:
==32417== Invalid write of size 8
==32417==    at 0x484F173: memset (vg_replace_strmem.c:1386)
==32417==    by 0x4033EB: test_signal_alternate_stack (unix.c:625)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 252 errors in context 6 of 7:
==32417== Invalid write of size 8
==32417==    at 0x484F16C: memset (vg_replace_strmem.c:1386)
==32417==    by 0x4033EB: test_signal_alternate_stack (unix.c:625)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeeb0 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417== 
==32417== 
==32417== 503 errors in context 7 of 7:
==32417== Invalid read of size 8
==32417==    at 0x484E98B: bcmp (vg_replace_strmem.c:1229)
==32417==    by 0x40349D: test_signal_alternate_stack (unix.c:626)
==32417==    by 0x48D8EA2: test_case_run (gtestutils.c:2988)
==32417==    by 0x48D8EA2: g_test_run_suite_internal (gtestutils.c:3090)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D8E1A: g_test_run_suite_internal (gtestutils.c:3109)
==32417==    by 0x48D9381: g_test_run_suite (gtestutils.c:3189)
==32417==    by 0x48D9407: g_test_run (gtestutils.c:2275)
==32417==    by 0x4025EC: main (unix.c:911)
==32417==  Address 0x1ffeffeea8 is on thread 1's stack
==32417==  in frame #1, created by test_signal_alternate_stack (unix.c:576)
==32417==

Comment 4 Bug Janitor Service 2024-06-08 03:46:28 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Bug Janitor Service 2024-06-23 03:47:32 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!