[Dovecot] deliver -m causes crash: Panic: stream doesn't support seeking backwards

[James Lee]

When exim runs deliver -m and tries to write to a directory that does
not exist is causes a crash which stops the exim MTA.


Dec  9 23:20:38 mailhost exim: [ID 197553 mail.info] 2010-12-09 23:20:38 1PQpmu-0007O9-OD <= dovecot-bounces+user=domain.co.uk at dovecot.org H=dovecot.org [62.236.108.70] P=esmtp S=2714 id=1291936811.2991.135.camel at kurkku.sapo.corppt.com
Dec  9 23:20:38 localhost spamd[7995]: prefork: child states: II
Dec  9 23:20:38 mailhost dovecot: [ID 583609 mail.info] lda(user at domain.co.uk): msgid=<1291936811.2991.135.camel at kurkku.sapo.corppt.com>: save failed to Dovecot: Mailbox doesn't exist: Dovecot
Dec  9 23:20:38 mailhost dovecot: [ID 583609 mail.crit] lda(user at domain.co.uk): Panic: stream doesn't support seeking backwards
Dec  9 23:20:38 mailhost dovecot: [ID 583609 mail.error] lda(user at domain.co.uk): Error: Raw backtrace: 0xff13ca0c -> 0xff146f88 -> 0xff144700 -> 0xff1472fc -> 0xff1442f4 -> 0xff146314 -> 0xff1466c4 -> 0xff1442f4 -> 0xff148d9c -> 0xff1442f4 -> 0xff144b94 -> 0xff15284c -> 0xff1526c4 -> 0xff0568cc -> 0xff01c7b4 -> 0xff01c850 -> 0xff1cb1b4 -> 0xff0260d0 -> 0xff385470 -> 0x132ac -> 0x11f40
Dec  9 23:20:38 mailhost exim: [ID 197553 mail.info] 2010-12-09 23:20:38 1PQpmu-0007O9-OD ** |/opt/xxxx/libexec/dovecot/deliver -d user at domain.co.uk -m Dovecot (user at domain.co.uk) <user at domain.co.uk> R=userforward T=address_pipe: Child process of address_pipe transport (running command "/opt/xxxx/libexec/dovecot/deliver -d user at domain.co.uk -m Dovecot") was terminated by signal 6 (Abort)
Dec  9 23:20:38 mailhost exim: [ID 197553 mail.info] 2010-12-09 23:20:38 1PQpmw-0007OL-B2 <= <> R=1PQpmu-0007O9-OD U=exim P=local S=3731



When run from the command line syslog reports:
    save failed to missing: Mailbox doesn't exist: missing
    saved mail to INBOX
(no crash)


Exceeding quotas also cause a "Panic: stream doesn't support seeking
backwards" and a crash as reported elsewhere. 

Dovecot 2.0.7
Exim 4.72



James.