[Bug ld/22283] New: Regression 2.28->2.29: postfix' postconf segfaults when built with 2.29

[heirecka at exherbo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=22283

            Bug ID: 22283
           Summary: Regression 2.28->2.29: postfix' postconf segfaults
                    when built with 2.29
           Product: binutils
           Version: 2.29
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: heirecka at exherbo dot org
  Target Milestone: ---

postconf from postfix >= 3 built with ld.bfd from binutils 2.29.x segfaults,
which makes it impossible to start postfix.
It works when built with the gold linker, ld.bfd from binutils <=2.28.1 and
postfix-2.11.x seems generally unaffected.

I bisected it and traced it back to c5d37467b152fe98f02ac1ff8188e32ecd0def95
(https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c5d37467b152fe98f02ac1ff8188e32ecd0def95).
If I revert that commit on top of 2.29.1 and build postfix with the result,
postconf works again.


Here's the backtrace from postconf:

Starting program: /usr/x86_64-pc-linux-gnu/bin/postconf 
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/usr/x86_64-pc-linux-gnu/lib/libthread_db.so.1".
/usr/x86_64-pc-linux-gnu/bin/postconf: panic: mystrdup: null pointer argument

Program received signal SIGABRT, Aborted.
0x00007ffff3759a50 in raise () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6
(gdb) bt
#0  0x00007ffff3759a50 in raise () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6
#1  0x00007ffff375b14a in abort () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6
#2  0x00007ffff754edb7 in vmsg_panic () from
/usr/lib/postfix/libpostfix-util.so
#3  0x00007ffff754ee71 in msg_panic () from /usr/lib/postfix/libpostfix-util.so
#4  0x00007ffff754fb68 in mystrdup () from /usr/lib/postfix/libpostfix-util.so
#5  0x00007ffff754fefe in name_mask_delim_opt () from
/usr/lib/postfix/libpostfix-util.so
#6  0x00007ffff7796d10 in ?? () from /usr/lib/postfix/libpostfix-global.so
#7  0x00007ffff77971a3 in mynetworks () from
/usr/lib/postfix/libpostfix-global.so
#8  0x00000000004036bb in pcf_mynetworks () at postconf_builtin.c:279
#9  0x0000000000406bb1 in pcf_convert_param_node (address@hidden,
name=0x64da10 "mynetworks", node=<optimized out>) at postconf_node.c:177
#10 0x000000000040786b in pcf_scan_default_parameter_values (dict_name=0x415662
"mail_dict", local_scope=0x0, valid_params=<optimized out>)
    at postconf_user.c:318
#11 pcf_register_user_parameters () at postconf_user.c:397
#12 0x0000000000403415 in main (argc=<optimized out>, argv=0x7fffffffd978) at
postconf.c:1027

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