Hi,
I just noticed a similar crash (well same assertion at least) on my production server. No idea what the user did, but I know it's a normal client, not some kind of script.
Since I don't know what the user did I can't reproduce the problem, but I figured dropping a note won't hurt.
I'm running dovecot 2.2.11 on Arch Linux with ext4, config and backtraces below.
PS: I'm not subscribed to the list, please make sure to CC me on replies.
Thanks, Florian
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Apr 14 09:49:29 karif dovecot: imap(user): Panic: file mail-index-transaction-export.c: line 117 (log_append_ext_intro): assertion failed: (intro->ext_id == idx || idx == (uint32_t)-1) Apr 14 09:49:29 karif dovecot: imap(user): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x67450) [0x7f842e6c2450] -> /usr/lib/dovecot/libdovecot.so.0(+0x6752e) [0x7f842e6c252e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f842e67d47e] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xba112) [0x7f842e9e8112] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_transaction_export+0x200) [0x7f842e9e85e0] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xb979f) [0x7f842e9e779f] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_transaction_commit_full+0x9d) [0x7f842e9e7bfd] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_transaction_commit+0xc) [0x7f842e9e7c9c] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x3e25a) [0x7f842e96c25a] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x3e4bc) [0x7f842e96c4bc] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x90e45) [0x7f842e9bee45] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_metadata+0x95) [0x7f842e9ab595] -> /us r/lib/dovecot/libdovecot-storage.so.0(mailbox_list_index_sync_name+0x2a4) [0x7f842e9bf754] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_list_index_sync+0x10a) [0x7f842e9bfd7a] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_list_index_refresh+0x9e) [0x7f842e9bac8e] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x90292) [0x7f842e9be292] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x90f9b) [0x7f842e9bef9b] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x31) [0x7f842e9ab4b1] -> dovecot/imap(imap_status_get+0x67) [0x41d5d7] -> dovecot/imap(cmd_status+0x123) [0x413133] -> dovecot/imap(command_exec+0x3c) [0x4170ec] -> dovecot/imap() [0x41614f] -> dovecot/imap() [0x416205] -> dovecot/imap(client_handle_input+0x115) [0x416505] -> dovecot/imap(client_input+0x72) [0x416892] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x27) [0x7f842e6d2527] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xd7) [0x7f842e6d32b7] -> /usr/lib/dovecot/libdovecot.so.0(io_loo p_run+0x38) [0x7f842e6d20c8] Apr 14 09:49:29 karif dovecot: imap(user): Fatal: master: service(imap): child 20156 killed with signal 6 (core dumped)
backtrace from a core dump below, sadly it doesn't contain much information since the dovecot build I'm running stripped.
#0 0x00007f842e2e8389 in raise () from /usr/lib/libc.so.6 #1 0x00007f842e2e9788 in abort () from /usr/lib/libc.so.6 #2 0x00007f842e6c2446 in ?? () from /usr/lib/dovecot/libdovecot.so.0 #3 0x00007f842e6c252e in ?? () from /usr/lib/dovecot/libdovecot.so.0 #4 0x00007f842e67d47e in i_panic () from /usr/lib/dovecot/libdovecot.so.0 #5 0x00007f842e9e8112 in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #6 0x00007f842e9e85e0 in mail_index_transaction_export () from /usr/lib/dovecot/libdovecot-storage.so.0 #7 0x00007f842e9e779f in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #8 0x00007f842e9e7bfd in mail_index_transaction_commit_full () from /usr/lib/dovecot/libdovecot-storage.so.0 #9 0x00007f842e9e7c9c in mail_index_transaction_commit () from /usr/lib/dovecot/libdovecot-storage.so.0 #10 0x00007f842e96c25a in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #11 0x00007f842e96c4bc in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #12 0x00007f842e9bee45 in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #13 0x00007f842e9ab595 in mailbox_get_metadata () from /usr/lib/dovecot/libdovecot-storage.so.0 #14 0x00007f842e9bf754 in mailbox_list_index_sync_name () from /usr/lib/dovecot/libdovecot-storage.so.0 #15 0x00007f842e9bfd7a in mailbox_list_index_sync () from /usr/lib/dovecot/libdovecot-storage.so.0 #16 0x00007f842e9bac8e in mailbox_list_index_refresh () from /usr/lib/dovecot/libdovecot-storage.so.0 #17 0x00007f842e9be292 in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #18 0x00007f842e9bef9b in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0 #19 0x00007f842e9ab4b1 in mailbox_get_status () from /usr/lib/dovecot/libdovecot-storage.so.0 #20 0x000000000041d5d7 in imap_status_get () #21 0x0000000000413133 in cmd_status () #22 0x00000000004170ec in command_exec () #23 0x000000000041614f in ?? () #24 0x0000000000416205 in ?? () #25 0x0000000000416505 in client_handle_input () #26 0x0000000000416892 in client_input () #27 0x00007f842e6d2527 in io_loop_call_io () from /usr/lib/dovecot/libdovecot.so.0 #28 0x00007f842e6d32b7 in io_loop_handler_run () from /usr/lib/dovecot/libdovecot.so.0 #29 0x00007f842e6d20c8 in io_loop_run () from /usr/lib/dovecot/libdovecot.so.0 #30 0x00007f842e682683 in master_service_run () from /usr/lib/dovecot/libdovecot.so.0 #31 0x000000000040b44f in main ()
config:
# 2.2.11: /etc/dovecot/dovecot.conf # OS: Linux 3.13.8-1-ARCH x86_64 Arch Linux auth_mechanisms = plain login auth_username_format = %Ln login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k mail_location = mdbox:~/.mdbox mail_plugins = " zlib notify mail_log" mailbox_list_index = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { hidden = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = . type = private } passdb { driver = pam } plugin { mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size sieve = ~/.dovecot.sieve sieve_dir = ~/.sieve sieve_global_dir = /etc/dovecot/sieve/global/ sieve_global_path = /etc/dovecot/sieve/default.sieve zlib_save = gz zlib_save_level = 6 } protocols = imap pop3 sieve lmtp service auth { unix_listener auth-client { group = postfix mode = 0660 user = postfix } user = root } service imap-login { process_limit = 400 process_min_avail = 5 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } } service managesieve-login { inet_listener sieve-obsolete { port = 2000 } } ssl_cert =