https://bugs.exim.org/show_bug.cgi?id=3116
Germano <germano.leichsenring@???> changed:
What |Removed |Added
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CC| |germano.leichsenring@gmail.
| |com
--- Comment #6 from Germano <germano.leichsenring@???> ---
Hi,
I was assuming it would be quick to reproduce/fix but it looks like I jumped
the trigger ..
I didn't go too deep into the source code, just a quick look and found out
about the permissions issue in my environment, which fixed the issue.
Looking at the code again, maybe expand_string() calls expand_string_2(), which
returns a const. dkim.c:745 is trying to update that const pointer, which could
have caused a segv? I don't know the exact relation to my "chmod" fix though.
local_scan.h:
extern uschar *expand_string(uschar *);
functions.h:
extern const uschar *expand_string_2(const uschar *, BOOL *);
expand.c:
uschar *
expand_string(uschar * string)
{ return US expand_string_2(CUS string, NULL); }
> I'd also like to know how "faulty line (dkim.c:745)" was arrived at.
I'm using exim4-daemon-light and I'm using the debug symbols with the same
version (4.98-1) from
http://debug.mirrors.debian.org/debian-debug/.
$ apt install exim4-daemon-light-dbgsym
$ addr2line -e /usr/sbin/exim4 0x5b1cd
./b-exim4-daemon-light/build-Linux-x86_64/./b-exim4-daemon-light/build-Linux-x86_64/exim.c:257
$ addr2line -e /usr/sbin/exim4 0x5b394
./b-exim4-daemon-light/build-Linux-x86_64/./b-exim4-daemon-light/build-Linux-x86_64/exim.c:294
$ addr2line -e /lib/x86_64-linux-gnu/libc.so.6 0x3f5d0
libc_sigaction.c:?
$ addr2line -e /usr/sbin/exim4 0x72f6a
./b-exim4-daemon-light/build-Linux-x86_64/./b-exim4-daemon-light/build-Linux-x86_64/dkim.c:745
$ addr2line -e /usr/sbin/exim4 0x739e4
./b-exim4-daemon-light/build-Linux-x86_64/./b-exim4-daemon-light/build-Linux-x86_64/dkim_transport.c:164
BR
Germano.
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