Version: 1:2.3.4.1-5+deb10u6 Hi! On May 18, 19 and 24 I saw repeated crashes that looked similar to the ones reported here before. Syslog content and one backtrace below. I haven't seen the problem since then. I don't know what kind of device this was. Note that the connection was authenticated correctly.
/Simon
root@uggla:~# coredumpctl info 30625
PID: 30625 (imap)
UID: 115 (dovmail)
GID: 122 (dovmail)
Signal: 11 (SEGV)
Timestamp: Mon 2021-05-24 19:14:30 UTC (2 weeks 0 days ago)
Command Line: dovecot/imap postlogin
Executable: /usr/lib/dovecot/imap
Control Group: /system.slice/dovecot.service
Unit: dovecot.service
Slice: system.slice
Boot ID: 246f0c28fe2d43e5ab7d0df6fadb97e9
Machine ID: 91d76afe2fc543e49fa0c766b415c23c
Hostname: uggla
Storage:
/var/lib/systemd/coredump/core.imap.115.246f0c28fe2d43e5ab7d0df6fadb97e9.30625.1621883670000000.lz4
Message: Process 30625 (imap) of user 115 dumped core.
Stack trace of thread 30625:
#0 0x00007f2957682bd0 mail_set_critical
(libdovecot-storage.so.0)
#1 0x00007f29576add65 maildir_transaction_save_commit_pre
(libdovecot-storage.so.0)
#2 0x00007f295770783b n/a (libdovecot-storage.so.0)
#3 0x00007f2957721f30 mail_index_transaction_commit_full
(libdovecot-storage.so.0)
#4 0x00007f2957707d91 index_transaction_commit
(libdovecot-storage.so.0)
#5 0x00007f29576e4277 n/a (libdovecot-storage.so.0)
#6 0x00007f295768506b mailbox_transaction_commit_get_changes
(libdovecot-storage.so.0)
#7 0x000055f4f315aaaf n/a (imap)
#8 0x000055f4f3167dc0 command_exec (imap)
#9 0x000055f4f31663f2 n/a (imap)
#10 0x000055f4f3166494 n/a (imap)
#11 0x000055f4f3166845 client_handle_input (imap)
#12 0x000055f4f3166d6e client_input (imap)
#13 0x00007f295758cbef io_loop_call_io (libdovecot.so.0)
#14 0x00007f295758e1e6 io_loop_handler_run_internal
(libdovecot.so.0)
#15 0x00007f295758cc8c io_loop_handler_run (libdovecot.so.0)
#16 0x00007f295758cdf0 io_loop_run (libdovecot.so.0)
#17 0x00007f295750d123 master_service_run (libdovecot.so.0)
#18 0x000055f4f3158bf5 main (imap)
#19 0x00007f29572f709b __libc_start_main (libc.so.6)
#20 0x000055f4f3158d8a _start (imap)
May 24 17:57:10 uggla dovecot: imap-login: Login: user=<simon>,
method=CRAM-MD5, rip=2001:9b1:41ac:ff00:60cf:be83:d196:9c4f,
lip=2001:9b1:8633::107, mpid=30625, TLS, TLSv1.3 with cipher
TLS_AES_256_GCM_SHA384 (256/256 bits)
...
May 24 19:14:30 uggla kernel: [295182.948459] show_signal_msg: 2 callbacks
suppressed
May 24 19:14:30 uggla kernel: [295182.948467] imap[30625]: segfault at 20 ip
00007f2957682bd0 sp 00007fff90234bd0 error 4 in
libdovecot-storage.so.0.0.0[7f2957660000+d1000]
May 24 19:14:30 uggla kernel: [295182.948481] Code: 00 00 48 89 44 24 18 48 8d
44 24 30 c7 44 24 14 30 00 00 00 48 89 44 24 20 e8 bc 44 fe ff 48 8d 74 24 10
48 89 ef 89 44 24 0c <f6> 43 20 02 74 4a e8 d5 2d fe ff 48 8b 3b 48 8d \
35 22 04 0b 00 48
May 24 19:14:30 uggla systemd[1]: Created slice
system-systemd\x2dcoredump.slice.
May 24 19:14:30 uggla systemd[1]: Started Process Core Dump (PID 20806/UID 0).
May 24 19:14:30 uggla dovecot:
imap(simon)<30625><caN/IxfDEpAgAQmxQaz/AGDPvoPRlpxP>: Fatal: master:
service(imap): child 30625 killed with signal 11 (core dumped)
May 24 19:14:30 uggla systemd-coredump[20807]: Process 30625 (imap) of user 115
dumped core.#012#012Stack trace of thread 30625:#012#0 0x00007f2957682bd0
mail_set_critical (libdovecot-storage.so.0)#012#1 0x00007f29576add65 mai\
ldir_transaction_save_commit_pre (libdovecot-storage.so.0)#012#2
0x00007f295770783b n/a (libdovecot-storage.so.0)#012#3 0x00007f2957721f30
mail_index_transaction_commit_full (libdovecot-storage.so.0)#012#4
0x00007f2957707d91 \
index_transaction_commit (libdovecot-storage.so.0)#012#5 0x00007f29576e4277
n/a (libdovecot-storage.so.0)#012#6 0x00007f295768506b
mailbox_transaction_commit_get_changes (libdovecot-storage.so.0)#012#7
0x000055f4f315aaaf n/a \
(imap)#012#8 0x000055f4f3167dc0 command_exec (imap)#012#9 0x000055f4f31663f2
n/a (imap)#012#10 0x000055f4f3166494 n/a (imap)#012#11 0x000055f4f3166845
client_handle_input (imap)#012#12 0x000055f4f3166d6e client_input (imap)#01\
2#13 0x00007f295758cbef io_loop_call_io (libdovecot.so.0)#012#14
0x00007f295758e1e6 io_loop_handler_run_internal (libdovecot.so.0)#012#15
0x00007f295758cc8c io_loop_handler_run (libdovecot.so.0)#012#16
0x00007f295758cdf0 io_loop\
_run (libdovecot.so.0)#012#17 0x00007f295750d123 master_service_run
(libdovecot.so.0)#012#18 0x000055f4f3158bf5 main (imap)#012#19
0x00007f29572f709b __libc_start_main (libc.so.6)#012#20 0x000055f4f3158d8a
_start (imap)
May 24 19:14:30 uggla systemd[1]: [email protected]: Succeeded.
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