[systemd-devel] systemd-coredump[25256]: AT_NULL terminator not found, cannot parse auxv structure.

[Andrei Borzenkov]

On Tue, Aug 27, 2024 at 12:21 PM Windl, Ulrich <u.windl at ukr.de> wrote:
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> Hi!
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> I have an issue where Perl dumps core for no obvious reason, and I noticed the line
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> systemd-coredump[25256]: AT_NULL terminator not found, cannot parse auxv structure.
>

It parses /proc/$PIF/auxv and apparently it was malformed. Look at
"hexdump -C" or similar, it should end with the line full of zeroes.

> In the journal.
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>
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> Can anybody explain what it actually means? System is SLES12 SP5 on x86_64 (systemd-228-157.60.1.x86_64).
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> Context is like this:
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> Aug 27 10:41:11 abcdefgh systemd-coredump[25256]: Process 24393 (perl) of user 1025 dumped core.
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>                                                   Stack trace of thread 24393:
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>                                                   #0  0x00007f89eb457397 kill (libc.so.6)
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>                                                   #1  0x00000000004fe592 Perl_apply (perl)
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>                                                   #2  0x00000000004f2863 Perl_pp_chown (perl)
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>                                                   #3  0x00000000004a4166 Perl_runops_standard (perl)
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>                                                   #4  0x00000000004370c8 Perl_call_sv (perl)
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>                                                   #5  0x0000000000493c24 Perl_sighandler (perl)
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>                                                   #6  0x00007f89eb5d5ce0 __restore_rt (libpthread.so.0)
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>                                                   #7  0x00000000004a47c0 Perl_pp_const (perl)
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>                                                   #8  0x00000000004a4166 Perl_runops_standard (perl)
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>                                                   #9  0x000000000043e041 perl_run (perl)
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>                                                   #10 0x000000000041e9d3 main (perl)
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>                                                   #11 0x00007f89eb442ac5 __libc_start_main (libc.so.6)
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>                                                   #12 0x000000000041ea0b _start (perl)