On 17/11/2019 19:40, Jens Rey via dovecot wrote:
Since I want to avoid debugging old and already fixed bugs, I updated to
# dovecot --version 2.3.8 (9df20d2db)
Now the debug log is a bit more chatty, but the error remains:
Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Created Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Pass environment: USER=user@domain.tld Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Pass environment: HOME=/var/vmail/mailboxes/domain.tld/user Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Pass environment: HOST=mail.domain.tld Debug: Mailbox INBOX: UID 22039: Opened mail because: mail stream Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Establishing connection Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh: Forked child process Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Connected to program Error: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): write(program stdin) failed: Broken pipe Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Failed to run program Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Disconnected Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Child process ended Error: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Terminated abnormally with signal 11 Debug: program exec:/usr/lib/dovecot/sieve/rspamd-learn-ham.sh (9891): Destroy Error: sieve: pipe action: failed to pipe message to program `rspamd-learn-ham.sh': refer to server log for more information. [2019-11-17 19:32:40] sieve: left message in mailbox 'INBOX' Error: sieve: Execution of script /usr/lib/dovecot/sieve/report-ham.sieve failed
Dovecot forks a child process to execute the program. Subsequently, at some point, the child process fails with a segmentation fault. Granted, that could still be happening in Dovecot code, but since the child process quickly executes the actual program (the shell in this case), it is more likely that this problem emerges outside Dovecot.
You can attach GDB to imap with follow-fork-mode set to 'child', so you can maybe see what causes the segfault.
Regards,
Stephan.