compiled with the CFLAGS now
no systemd no
yes, have tried this now but no core file is dumped
ulimit -c is "unlimited" so it is enabled.
have done a echo 1 > /proc/sys/fs/suid_dumpable (it was 0)
it now crashes (but continue the queuescanner, so not stopping) with a
signal 139
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 SIGSEGV (fault address: (nil))
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 SIGSEGV (null pointer
indirection)
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 SIGSEGV (qrun-p1-delivery:
55577 delivering 1vFj5z-0000000016v-2hc1 (queue run pid 54750)
)
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 backtrace
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 ---
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/usr/exim/bin/exim-4.99-2(stackdump+0x1f) [0x46c834]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 /usr/exim/bin/exim-4.99-2()
[0x46ca13]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/lib64/libpthread.so.0(+0xf770) [0x7fe1a7179770]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/lib64/libc.so.6(strlen+0x12) [0x7fe1a6e77622]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 /usr/exim/bin/exim-4.99-2()
[0x4558d6]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 /usr/exim/bin/exim-4.99-2()
[0x455955]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 /usr/exim/bin/exim-4.99-2()
[0x45c2e2]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/usr/exim/bin/exim-4.99-2(deliver_message+0x38e5) [0x466b7c]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/usr/exim/bin/exim-4.99-2(queue_run+0xd5c) [0x4a2cc2]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/usr/exim/bin/exim-4.99-2(single_queue_run+0x123) [0x4a33b4]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/usr/exim/bin/exim-4.99-2(main+0x74f6) [0x475e03]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1
/lib64/libc.so.6(__libc_start_main+0xfd) [0x7fe1a6e13b6d]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 /usr/exim/bin/exim-4.99-2()
[0x441b99]
2025-11-04 13:06:06 1vFj5z-0000000016v-2hc1 ---
2025-11-04 13:06:06 queue run: process 55577 crashed with signal 139
while delivering 1vFj5z-0000000016v-2hc1
tried to run it directly via gdb, after finishing with "Program exited
normally" and typing bt I get "no stack".
On 2025-11-04 11:00, Jeremy Harris via Exim-users wrote:
OK, that didn't detect anything. We need to investigate a core.
Do a build with "CFLAGS += -O0 -ggdb".
Does Slackware have the systemd-ish coredumpctl stuff?
I suspect not; so we need to enable suid-coredumps.
(Over here, Fedora, the hints are in "man core" which mentions
/proc/sys/fs/suid_dumpable)
and check that "ulimit" does not restrict the size of corefile.
Run a test to get a crash, and locate the core file.
Run up gdb - "sudo gdb <exim-binary-location> <corefile-location>".
Ignore all the offers to load debuginfo file for libraries.
At the prompt: "bt"
You should get a more comprehensive stacktrace, with file and line
number info.
Copy that here. Keep the corefile; we may want to pull some
variable values out of it.
(If you can do IRC, I'm in #exim on irc.libera.chat)
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