Re: Server crash on RHEL 9/s390x platform against PG16 - Mailing list pgsql-hackers

Hi,

Found server crash on RHEL 9/s390x platform with below test case - 

Machine details:
[edb@9428da9d2137 postgres]$ cat /etc/redhat-release
AlmaLinux release 9.2 (Turquoise Kodkod)
[edb@9428da9d2137 postgres]$ lscpu
Architecture:           s390x
  CPU op-mode(s):       32-bit, 64-bit
  Address sizes:        39 bits physical, 48 bits virtual
  Byte Order:           Big Endian

Configure command:
./configure --prefix=/home/edb/postgres/ --with-lz4 --with-zstd --with-llvm --with-perl --with-python --with-tcl --with-openssl --enable-nls --with-libxml --with-libxslt --with-systemd --with-libcurl --without-icu --enable-debug --enable-cassert --with-pgport=5414

Test case:
CREATE TABLE rm32044_t1
(
    pkey   integer,
    val  text
);
CREATE TABLE rm32044_t2
(
    pkey   integer,
    label  text,
    hidden boolean
);
CREATE TABLE rm32044_t3
(
        pkey integer,
        val integer
);
CREATE TABLE rm32044_t4
(
        pkey integer
);
insert into rm32044_t1 values ( 1 , 'row1');
insert into rm32044_t1 values ( 2 , 'row2');
insert into rm32044_t2 values ( 1 , 'hidden', true);
insert into rm32044_t2 values ( 2 , 'visible', false);
insert into rm32044_t3 values (1 , 1);
insert into rm32044_t3 values (2 , 1);

postgres=# SELECT * FROM rm32044_t1 LEFT JOIN rm32044_t2 ON rm32044_t1.pkey = rm32044_t2.pkey, rm32044_t3 LEFT JOIN rm32044_t4 ON rm32044_t3.pkey = rm32044_t4.pkey order by rm32044_t1.pkey,label,hidden;
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
The connection to the server was lost. Attempting reset: Failed.

backtrace:
[edb@9428da9d2137 postgres]$ gdb bin/postgres data/qemu_postgres_20230911-140628_65620.core
Core was generated by `postgres: edb postgres [local] SELECT  '.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00000000010a8366 in heap_compute_data_size (tupleDesc=tupleDesc@entry=0x1ba3d10, values=values@entry=0x1ba4168, isnull=isnull@entry=0x1ba41a8) at heaptuple.c:227
227 VARATT_CAN_MAKE_SHORT(DatumGetPointer(val)))
[Current thread is 1 (LWP 65597)]
Missing separate debuginfos, use: dnf debuginfo-install glibc-2.34-60.el9.s390x libcap-2.48-8.el9.s390x libedit-3.1-37.20210216cvs.el9.s390x libffi-3.4.2-7.el9.s390x libgcc-11.3.1-4.3.el9.alma.s390x libgcrypt-1.10.0-10.el9_2.s390x libgpg-error-1.42-5.el9.s390x libstdc++-11.3.1-4.3.el9.alma.s390x libxml2-2.9.13-3.el9_2.1.s390x libzstd-1.5.1-2.el9.s390x llvm-libs-15.0.7-1.el9.s390x lz4-libs-1.9.3-5.el9.s390x ncurses-libs-6.2-8.20210508.el9.s390x openssl-libs-3.0.7-17.el9_2.s390x systemd-libs-252-14.el9_2.3.s390x xz-libs-5.2.5-8.el9_0.s390x
(gdb) bt
#0  0x00000000010a8366 in heap_compute_data_size (tupleDesc=tupleDesc@entry=0x1ba3d10, values=values@entry=0x1ba4168, isnull=isnull@entry=0x1ba41a8) at heaptuple.c:227
#1  0x00000000010a9bb0 in heap_form_minimal_tuple (tupleDescriptor=0x1ba3d10, values=0x1ba4168, isnull=0x1ba41a8) at heaptuple.c:1484
#2  0x00000000016553fa in ExecCopySlotMinimalTuple (slot=<optimized out>) at ../../../../src/include/executor/tuptable.h:472
#3  tuplesort_puttupleslot (state=state@entry=0x1be4d18, slot=slot@entry=0x1ba4120) at tuplesortvariants.c:610
#4  0x00000000012dc0e0 in ExecIncrementalSort (pstate=0x1acb4d8) at nodeIncrementalSort.c:716
#5  0x00000000012b32c6 in ExecProcNode (node=0x1acb4d8) at ../../../src/include/executor/executor.h:273
#6  ExecutePlan (execute_once=<optimized out>, dest=0x1ade698, direction=<optimized out>, numberTuples=0, sendTuples=<optimized out>, operation=CMD_SELECT, use_parallel_mode=<optimized out>, planstate=0x1acb4d8, estate=0x1acb258) at execMain.c:1670
#7  standard_ExecutorRun (queryDesc=0x19ad338, direction=<optimized out>, count=0, execute_once=<optimized out>) at execMain.c:365
#8  0x00000000014a6ae2 in PortalRunSelect (portal=portal@entry=0x1a63558, forward=forward@entry=true, count=0, count@entry=9223372036854775807, dest=dest@entry=0x1ade698) at pquery.c:924
#9  0x00000000014a84e0 in PortalRun (portal=portal@entry=0x1a63558, count=count@entry=9223372036854775807, isTopLevel=isTopLevel@entry=true, run_once=run_once@entry=true, dest=dest@entry=0x1ade698, altdest=0x1ade698, qc=0x40007ff7b0) at pquery.c:768
#10 0x00000000014a3c1c in exec_simple_query (
    query_string=0x19ea0e8 "SELECT * FROM rm32044_t1 LEFT JOIN rm32044_t2 ON rm32044_t1.pkey = rm32044_t2.pkey, rm32044_t3 LEFT JOIN rm32044_t4 ON rm32044_t3.pkey = rm32044_t4.pkey order by rm32044_t1.pkey,label,hidden;") at postgres.c:1274
#11 0x00000000014a57aa in PostgresMain (dbname=<optimized out>, username=<optimized out>) at postgres.c:4637
#12 0x00000000013fdaf6 in BackendRun (port=0x1a132c0, port=0x1a132c0) at postmaster.c:4464
#13 BackendStartup (port=0x1a132c0) at postmaster.c:4192
#14 ServerLoop () at postmaster.c:1782
#15 0x00000000013fec34 in PostmasterMain (argc=argc@entry=3, argv=argv@entry=0x19a59a0) at postmaster.c:1466
#16 0x0000000001096faa in main (argc=<optimized out>, argv=0x19a59a0) at main.c:198

(gdb) p val
$1 = 0

```

Does anybody have any idea about this?

--

--

Thanks & Regards, 

Suraj kharage, 

 

edbpostgres.com