[Bug libc/26821] New: Memory leak test failures on Fedora 33

[Bug libc/26821] New: Memory leak test failures on Fedora 33

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26821

            Bug ID: 26821
           Summary: Memory leak test failures on Fedora 33
           Product: glibc
           Version: 2.33
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

On Fedora 33/x86-64, I got

FAIL: posix/bug-ga2-mem
FAIL: resolv/mtrace-tst-leaks2

which passed on Fedora 32/x86-64.

[hjl@gnu-cfl-2 build-x86_64-linux]$ cat posix/bug-ga2-mem.out

Memory not freed:
-----------------
           Address     Size     Caller
0x0000000001844ee0     0x1b  at 0x7f65753bd1bc
0x0000000001844f10    0x4b4  at 0x7f65753aade1
0x00000000018453d0     0x1b  at 0x7f65753ab0b9
0x0000000001845400     0x15  at 0x7f65753bd1bc
0x0000000001845420    0x4ae  at 0x7f65753aade1
0x00000000018458e0     0x15  at 0x7f65753ab0b9
0x0000000001845900     0x53  at 0x7f65753a5c87
0x0000000001845960    0x4b0  at 0x7f65753aade1
0x0000000001845e20     0x53  at 0x7f65753ab0b9
0x0000000001845f50    0x1e0  at 0x7f65753b0276
0x0000000001846140    0x180  at 0x7f65753b0276
0x00000000018462d0    0x210  at 0x7f65753b0276
0x00000000018471f0     0x58  at 0x7f65753b100e
[hjl@gnu-cfl-2 build-x86_64-linux]$ 

[hjl@gnu-cfl-2 build-x86_64-linux]$ cat resolv/mtrace-tst-leaks2.out 

Memory not freed:
-----------------
           Address     Size     Caller
0x000000000219ac10     0x1b  at 0x7f4d6d6ef1bc
0x000000000219ac40    0x4b4  at 0x7f4d6d6dcde1
0x000000000219b100     0x1b  at 0x7f4d6d6dd0b9
0x000000000219b130     0x15  at 0x7f4d6d6ef1bc
0x000000000219b150    0x4ae  at 0x7f4d6d6dcde1
0x000000000219b610     0x15  at 0x7f4d6d6dd0b9
0x000000000219b630     0x53  at 0x7f4d6d6d7c87
0x000000000219b690    0x4b0  at 0x7f4d6d6dcde1
0x000000000219bb50     0x53  at 0x7f4d6d6dd0b9
0x000000000219bc80    0x1e0  at 0x7f4d6d6e2276
0x000000000219be70    0x180  at 0x7f4d6d6e2276
0x000000000219c000    0x210  at 0x7f4d6d6e2276
0x000000000219cf20     0x58  at 0x7f4d6d6e300e
[hjl@gnu-cfl-2 build-x86_64-linux]$

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[Bug libc/26821] Memory leak test failures on Fedora 33

[stli at linux dot ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26821

Stefan Liebler <stli at linux dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |stli at linux dot ibm.com

--- Comment #1 from Stefan Liebler <stli at linux dot ibm.com> ---
Usually all malloc'ed resources from getaddrinfo / gethostbyname are freed
and the libraries are dlclose'd in nss/nsswitch.c:libc_freeres_fn (free_mem).
Unfortunately, /lib64/libnss_resolve.so.2 is marked with DF_1_NODELETE.
As this library is not unmapped, you see "Memory not freed".

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[Bug libc/26821] Memory leak test failures on Fedora 33

[stli at linux dot ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26821

Stefan Liebler <stli at linux dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.33
             Status|NEW                         |RESOLVED

--- Comment #2 from Stefan Liebler <stli at linux dot ibm.com> ---
Fixed with commit
"Use libnss_files.so for tests posix/bug-ga2 and resolv/tst-leaks2 [BZ #26821]"
https://sourceware.org/git/?p=glibc.git;a=commit;h=29fddfc7dfd6444fa61a256e9a0d0127545e1f2e

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[Bug libc/26821] Memory leak test failures on Fedora 33

[stli at linux dot ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26821

--- Comment #3 from Stefan Liebler <stli at linux dot ibm.com> ---
See also the follow-up commit:
"Mark mtrace tests UNSUPPORTED if bug-ga2.mtrace or tst-leaks2.mtrace are
missing"
https://sourceware.org/git/?p=glibc.git;a=commit;h=aa7e05c3043302403e91b85c4aea39e0aac6c7c8

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