[Dovecot] Panic: file mail-index-sync-ext.c: line 155 (get_ext_header): assertion failed

[John V. Baboval]

This strace output may or may not be helpful. I was able to work around 
the problem by clearing out the user's .imap directory. Unfortunatly I 
didn't think ahead enough to save a copy:

lock(9, LOCK_EX)                       = 0
alarm(0)                                = 120
stat64("/home/dpowell/.imap/INBOX/dovecot.index.log", 
{st_mode=S_IFREG|0600, st_size=43360, ...}) = 0
fstat64(9, {st_mode=S_IFREG|0600, st_size=43360, ...}) = 0
fstat64(8, {st_mode=S_IFREG|0600, st_size=376, ...}) = 0
stat64("/home/dpowell/.imap/INBOX/dovecot.index", {st_mode=S_IFREG|0600, 
st_size=376, ...}) = 0
alarm(120)                              = 0
flock(8, LOCK_SH)                       = 0
alarm(0)                                = 120
fstat64(8, {st_mode=S_IFREG|0600, st_size=376, ...}) = 0
mmap2(NULL, 376, PROT_READ|PROT_WRITE, MAP_SHARED, 8, 0) = 0xb7d88000
fstat64(11, {st_mode=S_IFREG|0640, st_size=0, ...}) = 0
fstat64(11, {st_mode=S_IFREG|0640, st_size=0, ...}) = 0
pread(11, "", 4096, 0)                  = 0
fstat64(11, {st_mode=S_IFREG|0640, st_size=0, ...}) = 0
pwrite(9, "\0\0\0\0 \0\0\20", 8, 43360) = 8
pwrite(9, "\30\0\4\0}\233^C", 8, 43368) = 8
pwrite(9, "\200\200\200\204", 4, 43360) = 4
fstat64(9, {st_mode=S_IFREG|0600, st_size=43376, ...}) = 0
munmap(0xb7d89000, 43360)               = 0
mmap2(NULL, 43376, PROT_READ, MAP_SHARED, 9, 0) = 0xb7d89000
madvise(0xb7d89000, 43376, MADV_SEQUENTIAL) = 0
fstat64(8, {st_mode=S_IFREG|0600, st_size=376, ...}) = 0
stat64("/home/dpowell/.imap/INBOX/dovecot.index", {st_mode=S_IFREG|0600, 
st_size=376, ...}) = 0
flock(8, LOCK_EX|LOCK_NB)               = 0
write(2, "imap(dpowell): ", 15imap(dpowell): )         = 15
write(2, "Panic: ", 7Panic: )                  = 7
write(2, "file mail-index-sync-ext.c: line"..., 139file 
mail-index-sync-ext.c: line 155 (get_ext_header): assertion failed: 
(memcmp((char *)(ext_hdr + 1), ext->name, strlen(ext->name)) == 0)) = 139
write(2, "\n", 1
)                       = 1
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(12734, 12734, SIGABRT)           = 0
--- SIGABRT (Aborted) @ 0 (0) ---
+++ killed by SIGABRT +++


John V. Baboval wrote:
> One of the mbox files on my server causes dovecot to assert. I've 
> caught the assert in gdb and have attached the backtrace. Unfortunatly 
> my binary isn't built with debugging symbols, so I'm not sure how 
> helpful it will be.
>
>
> smtp:/var$ uname -a
> Linux smtp 2.6.14-2-686-smp #1 SMP Sat Nov 26 13:37:07 UTC 2005 i686 
> GNU/Linux
> smtp:/var$ cat /etc/debian_version
> 3.1
> smtp:/var$ dpkg -p dovecot-imapd
> Package: dovecot-imapd
> Priority: optional
> Section: mail
> Installed-Size: 780
> Maintainer: Jaldhar H. Vyas <jaldhar at debian.org>
> Architecture: i386
> Source: dovecot
> Version: 1.0.alpha4-1
>
>
> Starting program: /usr/lib/dovecot/imap
> (no debugging symbols found)
> (no debugging symbols found)
> (no debugging symbols found)
> (no debugging symbols found)
> * PREAUTH [CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND 
> UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS] Logged in 
> as dpowell
> x select INBOX
> imap(dpowell): Panic: file mail-index-sync-ext.c: line 155 
> (get_ext_header): assertion failed: (memcmp((char *)(ext_hdr + 1), 
> ext->name, strlen(ext->name)) == 0)
>
> Program received signal SIGABRT, Aborted.
> 0xb7de2a27 in raise () from /lib/tls/libc.so.6
> (gdb) bt full
> #0  0xb7de2a27 in raise () from /lib/tls/libc.so.6
> No symbol table info available.
> #1  0xb7de435b in abort () from /lib/tls/libc.so.6
> No symbol table info available.
> #2  0x0809f442 in data_stack_deinit ()
> No symbol table info available.
> #3  0x0809f5e7 in i_panic ()
> No symbol table info available.
> #4  0x08090dcd in mail_index_dummy_view_open ()
> No symbol table info available.
> #5  0x0809113a in mail_index_dummy_view_open ()
> No symbol table info available.
> #6  0x08091b58 in mail_index_sync_ext_intro ()
> No symbol table info available.
> #7  0x08092368 in mail_index_sync_keywords ()
> No symbol table info available.
> #8  0x080893d2 in mail_index_sync_record ()
> No symbol table info available.
> #9  0x08089c5e in mail_index_sync_update_index ()
> No symbol table info available.
> #10 0x08087d1d in mail_index_sync_commit ()
> No symbol table info available.
> #11 0x080726d0 in mbox_sync ()
> No symbol table info available.
> #12 0x080732b7 in mbox_storage_sync_init ()
> No symbol table info available.
> #13 0x0805f8e5 in imap_sync_nonselected ()
> No symbol table info available.
> #14 0x08057f31 in _cmd_select_full ()
> No symbol table info available.
> #15 0x080580d1 in cmd_select ()
> No symbol table info available.
> #16 0x08059861 in _client_input ()
> No symbol table info available.
> #17 0x080a5984 in io_loop_handler_run ()
> No symbol table info available.
> #18 0x080a4d49 in io_loop_run ()
> No symbol table info available.
> #19 0x08061169 in main ()
> No symbol table info available.
> (gdb)
>
> -John