On 2024-09-28 Germano Leichsenring <germano.leichsenr...@gmail.com> wrote: [...] > I've followed upstream instructions to setup DKIM. > https://exim.org/exim-html-4.93/doc/html/spec_html/ch-dkim_spf_and_dmarc.html > Note, the command below creates the private key file with permissions 600. > $ openssl genpkey -algorithm ed25519 -out dkim_ed25519.private
> * What was the outcome of this action? > Accordingly, exim4 process crashed and left a stacktrace in the paniclog. > 2024-09-28 10:33:46 1suML0-00000001hFO-444S SIGSEGV (fault address: > 0x55fac168b1d0) > 2024-09-28 10:33:46 1suML0-00000001hFO-444S SEGV_ACCERR > 2024-09-28 10:33:46 1suML0-00000001hFO-444S SIGSEGV (maybe attempt to write > to immutable memory) > ) > 2024-09-28 10:33:46 1suML0-00000001hFO-444S backtrace > 2024-09-28 10:33:46 1suML0-00000001hFO-444S --- > 2024-09-28 10:33:46 1suML0-00000001hFO-444S /usr/sbin/exim4(+0x5b1cd) > [0x55faaf6381cd] > 2024-09-28 10:33:46 1suML0-00000001hFO-444S /usr/sbin/exim4(+0x5b394) > [0x55faaf638394] > 2024-09-28 10:33:46 1suML0-00000001hFO-444S > /lib/x86_64-linux-gnu/libc.so.6(+0x3f5d0) [0x7f34f66545d0] > 2024-09-28 10:33:46 1suML0-00000001hFO-444S /usr/sbin/exim4(+0x72f6a) > [0x55faaf64ff6a] > 2024-09-28 10:33:46 1suML0-00000001hFO-444S /usr/sbin/exim4(+0x739e4) > [0x55faaf6509e4] > After looking at the faulty line (dkim.c:745) I've realized that the file > was not readable. [...] Hello Germano, I could not reproduce this. I set up dkim signing, verified that it worked by sending a test message and ran chmod 0000 on the key files. All I got was an error message in mainlog and panic log (unable to open file for reading) but no crash. How did you come up with the diagnosis that dkim.c:745 was the faulty line? (Please feel free to directly respond on https://bugs.exim.org/show_bug.cgi?id=3116 ) cu Andreas -- `What a good friend you are to him, Dr. Maturin. His other friends are so grateful to you.' `I sew his ears on from time to time, sure'
