Many smbd processes exist and are leaking memory

Issue

• Core dump is output by SIGABRT due to high memory usage of smbd process

$ ps aux | grep smbd | wc -l
62

$ ps aux | grep smbd | sort -k 6 -n -r | head -n3
test1 165694  1.4 65.3 261360920 257471164 ? S    May15 837:08 /usr/sbin/smbd --foreground --no-process-group
test2      82169  0.1  3.9 16855096 15667400 ?   S    Jun07  33:39 /usr/sbin/smbd --foreground --no-process-group
test3 238739  0.0  1.0 5446728 4261912 ?     S    May31  13:50 /usr/sbin/smbd --foreground --no-process-group

smbd[395429]: [2024/06/24 10:30:08.196658,  0] ../lib/util/fault.c:78(fault_report)
smbd[395429]:  ===============================================================
smbd[395429]: [2024/06/24 10:30:08.196701,  0] ../lib/util/fault.c:79(fault_report)
smbd[395429]:  INTERNAL ERROR: Signal 6 in pid 395429 (4.7.1)
smbd[395429]:  Please read the Trouble-Shooting section of the Samba HOWTO
smbd[395429]: [2024/06/24 10:30:08.196723,  0] ../lib/util/fault.c:81(fault_report)
smbd[395429]:  ===============================================================
smbd[395429]: [2024/06/24 10:30:08.196738,  0] ../source3/lib/util.c:804(smb_panic_s3)
smbd[395429]:  PANIC (pid 395429): internal error
smbd[395429]: [2024/06/24 10:30:08.217090,  0] ../source3/lib/util.c:915(log_stack_trace)
smbd[395429]:  BACKTRACE: 30 stack frames:
smbd[395429]:   #0 /lib64/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f54dfd32a3a]
smbd[395429]:   #1 /lib64/libsmbconf.so.0(smb_panic_s3+0x20) [0x7f54dfd32b10]
kernel: Core dump to |/usr/libexec/abrt-hook-ccpp 6 18446744073709551615 395429 0 0 1719192608 e 395429 395429 kcaefs pipe failed
smbd[395429]:   #2 /lib64/libsamba-util.so.0(smb_panic+0x2f) [0x7f54e1e2feaf]
smbd[395429]:   #3 /lib64/libsamba-util.so.0(+0x250c6) [0x7f54e1e300c6]
smbd[395429]:   #4 /lib64/libpthread.so.0(+0xf5d0) [0x7f54e22975d0]
smbd[395429]:   #5 /lib64/libc.so.6(gsignal+0x37) [0x7f54de39e207]
smbd[395429]:   #6 /lib64/libc.so.6(abort+0x148) [0x7f54de39f8f8]
smbd[395429]:   #7 /lib64/libtevent-util.so.0(+0x10b1) [0x7f54e10870b1]
smbd[395429]:   #8 /usr/lib64/samba/libsmbd-base-samba4.so(+0x1bfd84) [0x7f54e1a52d84]
smbd[395429]:   #9 /lib64/libtevent.so.0(_tevent_req_error+0x22) [0x7f54de73b212]
smbd[395429]:   #10 /usr/lib64/samba/libsmbd-base-samba4.so(+0x1bff23) [0x7f54e1a52f23]
smbd[395429]:   #11 /lib64/libtevent.so.0(_tevent_req_error+0x22) [0x7f54de73b212]
smbd[395429]:   #12 /lib64/libtevent.so.0(_tevent_req_error+0x22) [0x7f54de73b212]
smbd[395429]:   #13 /usr/lib64/samba/libsmbd-base-samba4.so(+0xe3540) [0x7f54e1976540]
smbd[395429]:   #14 /lib64/libtevent.so.0(tevent_common_loop_immediate+0xda) [0x7f54de73a9ea]
smbd[395429]:   #15 /lib64/libtevent.so.0(+0xa5fd) [0x7f54de73f5fd]
smbd[395429]:   #16 /lib64/libtevent.so.0(+0x8c07) [0x7f54de73dc07]
smbd[395429]:   #17 /lib64/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f54de739ffd]
smbd[395429]:   #18 /lib64/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f54de73a22b]
smbd[395429]:   #19 /lib64/libtevent.so.0(+0x8ba7) [0x7f54de73dba7]
smbd[395429]:   #20 /usr/lib64/samba/libsmbd-base-samba4.so(smbd_process+0x6e4) [0x7f54e1a36584]
smbd[395429]:   #21 /usr/sbin/smbd(+0xd1d4) [0x55b78e9781d4]
smbd[395429]:   #22 /lib64/libtevent.so.0(+0xa83b) [0x7f54de73f83b]
smbd[395429]:   #23 /lib64/libtevent.so.0(+0x8c07) [0x7f54de73dc07]
smbd[395429]:   #24 /lib64/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f54de739ffd]
smbd[395429]:   #25 /lib64/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f54de73a22b]
smbd[395429]:   #26 /lib64/libtevent.so.0(+0x8ba7) [0x7f54de73dba7]
smbd[395429]:   #27 /usr/sbin/smbd(main+0x1afe) [0x55b78e97325e]
smbd[395429]:   #28 /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f54de38a3d5]
smbd[395429]:   #29 /usr/sbin/smbd(+0x8571) [0x55b78e973571]
smbd[395429]: [2024/06/24 10:30:08.217295,  0] ../source3/lib/dumpcore.c:318(dump_core)
smbd[395429]:  coredump is handled by helper binary specified at /proc/sys/kernel/core_pattern
[...]
abrt-hook-ccpp: Process 427418 (smbd) of user 0 killed by SIGABRT - dumping core