Hello,
may I please check with the list about an rsyslogd segmentation fault
seen on the following OS: Ubuntu 16.04.5 running Kernel:
4.15.0-55-generic, the rsyslog package version is 8.16.0-1ubuntu3. The
stack trace looks like,
warning: Could not load shared library symbols for
/lib/x86_64-linux-gnu/libnss_sss.so.2.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/rsyslogd -n'.
Program terminated with signal SIGSEGV, Segmentation fault.
warning: Unexpected size of section `.reg-xstate/90732' in core file.
#0 MsgGetProp (pMsg=pMsg@entry=0x7fb4f800a350,
pTpe=pTpe@entry=0xd7f100, pProp=pProp@entry=0xd7f120,
pPropLen=pPropLen@entry=0x7fb4fecec96c,
pbMustBeFreed=pbMustBeFreed@entry=0x7fb4fecec96a,
ttNow=ttNow@entry=0x7fb4fececa40) at msg.c:3843
3843 msg.c: No such file or directory.
[Current thread is 1 (Thread 0x7fb4feced700 (LWP 90732))]
(gdb) bt
#0 MsgGetProp (pMsg=pMsg@entry=0x7fb4f800a350,
pTpe=pTpe@entry=0xd7f100, pProp=pProp@entry=0xd7f120,
pPropLen=pPropLen@entry=0x7fb4fecec96c,
pbMustBeFreed=pbMustBeFreed@entry=0x7fb4fecec96a,
ttNow=ttNow@entry=0x7fb4fececa40) at msg.c:3843
#1 0x00000000004409e4 in tplToString (pTpl=0xd7f090,
pMsg=pMsg@entry=0x7fb4f800a350, iparam=iparam@entry=0x7fb4f4010e80,
ttNow=ttNow@entry=0x7fb4fececa40) at ../template.c:195
#2 0x000000000043c53f in prepareDoActionParams (pWti=0xd6e390,
ttNow=0x7fb4fececa40, pMsg=0x7fb4f800a350, pAction=0xd7d850) at
../action.c:936
#3 processMsgMain (pAction=pAction@entry=0xd7d850,
pWti=pWti@entry=0xd6e390, pMsg=pMsg@entry=0x7fb4f800a350,
ttNow=ttNow@entry=0x7fb4fececa40) at ../action.c:1302
#4 0x000000000043cab4 in doSubmitToActionQ (pAction=0xd7d850,
pWti=0xd6e390, pMsg=0x7fb4f800a350) at ../action.c:1472
#5 0x0000000000435d2d in execAct (stmt=0xd7f1c0, pWti=0xd6e390,
pMsg=0x7fb4f800a350) at ruleset.c:202
#6 scriptExec (root=<optimized out>, pMsg=pMsg@entry=0x7fb4f800a350,
pWti=pWti@entry=0xd6e390) at ruleset.c:455
#7 0x0000000000435d9b in execPRIFILT (pWti=<optimized out>,
pMsg=<optimized out>, stmt=<optimized out>) at ruleset.c:315
#8 scriptExec (root=<optimized out>, pMsg=pMsg@entry=0x7fb4f800a350,
pWti=pWti@entry=0xd6e390) at ruleset.c:473
#9 0x00000000004363b4 in processBatch (pBatch=0xd6e3c0,
pWti=0xd6e390) at ruleset.c:509
#10 0x0000000000444f1c in msgConsumer (notNeeded=<optimized out>,
pBatch=0xd6e3c0, pWti=0xd6e390) at rsyslogd.c:579
#11 0x0000000000431e53 in ConsumerReg (pThis=0xd743b0, pWti=0xd6e390)
at queue.c:1898
#12 0x000000000042eb9e in wtiWorker (pThis=pThis@entry=0xd6e390) at wti.c:334
#13 0x000000000042dbac in wtpWorker (arg=0xd6e390) at wtp.c:389
#14 0x00007fb50272c6ba in start_thread (arg=0x7fb4feced700) at
pthread_create.c:333
#15 0x00007fb501a4241d in iopl () at ../sysdeps/unix/syscall-template.S:84
#16 0x0000000000000000 in ?? ()
(gdb)
I've put up the information I can analyse through gdb here -
https://pastebin.com/CQeHiMU8
Please could anyone on the list help me understand if this is a known
issue and already fixed in later versions, I would be very grateful
for inputs. I am going through the devel runtime/msg.c code to see
potential segfaults and I see several been fixed since this version
but none that obviously are the fix to this issue, so I was not sure
about that.
Regards,
nikhil.
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