[Dovecot] Segfault when opening a public folder, dovecot 1.1 beta4

[Adam McDougall]

On Mon, Oct 29, 2007 at 05:10:44PM -0400, Adam McDougall wrote:

  On Mon, Oct 29, 2007 at 10:49:34PM +0200, Timo Sirainen wrote:
  
    On Sun, 2007-10-28 at 15:37 -0400, Adam McDougall wrote:
    >   Oct 28 11:01:40 gribble dovecot: IMAP(mcdouga9): fchown(/egr/mail/shared/decs/temp.gribble.97159.dc6633e16f47011d) 
    >   failed: Operation not permitted
    >   
    >   >From the name, I can't even tell what its for, what dovecot-shared might be causing it, etc.
    > 
    > I did some hunting because I was curious (I assume you would know right away) and its from
    > lib/safe-mkstemp.c which dotlock uses.
    
    It's used for creating dovecot-acl-list. Hmm. Looks like there are now
    two places where Dovecot takes permissions from: dovecot-shared file and
    the directory where it exists. If you set g+s to the dir too this error
    goes away. I'll have to think a bit more what I'll do about this. Maybe
    dovecot-shared file just could go away and only the dir permissions
    would be used.
    
  That reminds me, I do think I put dovecot-shared in that directory just to satisfy 1.1.
  The group owner on /egr/mail/shared/decs/ is the group I am using to restrict entry into
  the directory (it is mode 770) so all of the users using folders inside are part of the 
  group, so I'm not sure why the fchown would fail?  
  
  Also just a note (if I remember correctly) the existance of dovecot-shared causes
  dovecot+acl to treat the folder flags as private unless the code is modified (I still use
  that hack locally) so its not just the permissions of an object (presently dovecot-shared)
  that have an affect.  Its seems like this is alot of functionality to load onto just the 
  existance and permissions of a file :) 
  
  I did set g+s on /egr/mail/shared/decs/ and relogged in with thunderbird but got the 
  error right away:
  
  Oct 29 17:02:55 gribble dovecot: IMAP(mcdouga9): fchown(/egr/mail/shared/decs/temp.gribble.65681.2a5ad23c6e8cd308) 
  failed: Operation not permitted
  
Lately I have been getting:

Nov 17 08:24:36 hill dovecot: IMAP(mcdouga9): 
open(/egr/mail/shared/decs/temp.hill.80542.6d06d40810d76654) failed: Permission denied
Nov 17 08:24:36 hill dovecot: IMAP(mcdouga9): 
safe_mkstemp(/egr/mail/shared/decs/temp.hill.80542.6d06d40810d76654) failed: Permission denied
Nov 17 08:25:18 hill dovecot: IMAP(mcdouga9): 
open(/egr/mail/shared/decs/temp.hill.80542.1f3d606a7fa4a3cc) failed: Permission denied
Nov 17 08:25:18 hill dovecot: IMAP(mcdouga9): 
safe_mkstemp(/egr/mail/shared/decs/temp.hill.80542.1f3d606a7fa4a3cc) failed: Permission denied

Right now I have /egr/mail/shared/decs/ unwritable to users.  Some of these errors still happen
when the directory is writable, but I am also concerned if it will cause these temp files to
be renamed to dovecot-acl-list, which I assume would conflict with other users if created by
one user.  

Should I worry about these errors?  Does it impair caching of folder lists or something?
Thanks.