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2449823 - Crash in EgPhAlloc and EgPhFree functions

Symptom

You experience crashes / core dumps with the following C-Stacks:

----------------------------C-STACK --------------------
dw.sapE1F_DVEBMGS00[N](LinStackBacktrace+0xa9)[0x6252e2]
dw.sapE1F_DVEBMGS00[N](LinStack+0x3f)[0x22dfd2f]
dw.sapE1F_DVEBMGS00[N](CTrcStack2+0x4b)[0x624d56]
dw.sapE1F_DVEBMGS00[N](SigIGenAction+0x1043)[0x17e2619]
<signal handler called> [0x7f980f68e850]
dw.sapE1F_DVEBMGS00[N](MmxIBlockRemove.isra.2+0xb8)[0x2206f28]
dw.sapE1F_DVEBMGS00[N](MmxFree2+0x95)[0x2209ad5]
dw.sapE1F_DVEBMGS00[N](EgPhFree+0x67)[0x2206227]
dw.sapE1F_DVEBMGS00[N](EmHyperContextDelete+0xf6)[0x26df846]
dw.sapE1F_DVEBMGS00[N](ThEmFree(unsigned char)+0xc8)[0x1a44b48]
...

or

----------------------------C-STACK --------------------
dw.sapE1O_DVEBMGS00[N](LinStackBacktrace+0xa9)[0x6548ca]    
dw.sapE1O_DVEBMGS00[N](LinStack+0x3f)[0x23616ff]                                                  
dw.sapE1O_DVEBMGS00[N](CTrcStack2+0x4b)[0x65433e]                    
dw.sapE1O_DVEBMGS00[N](rabax(char16_t const*, char16_t const*, int, char16_t const*, void const*)+
dw.sapE1O_DVEBMGS00[N](ab_CoreInfo+0xb8)[0x7b2b7a]                                                
dw.sapE1O_DVEBMGS00[N](ThrCoreInfo(int)+0x9)[0x5e9dec]                                            
dw.sapE1O_DVEBMGS00[N](ThIErrHandle(int, unsigned char, TH_VERBOSE_LEVEL, char16_t const*)+0x12b1)
dw.sapE1O_DVEBMGS00[N](ThErrHandle2(int, unsigned char, char16_t const*, char16_t const*)+0x97)[0x
dw.sapE1O_DVEBMGS00[N](SigIGenAction+0x1262)[0x192e082]                                          
libpthread.so.0[T][0x7f4722a0e850]                                                                
dw.sapE1O_DVEBMGS00[N](MmxMalloc2+0xa2)[0x22ab752]                                            
dw.sapE1O_DVEBMGS00[N](EgPhAlloc+0x81)[0x22a5931]              
dw.sapE1O_DVEBMGS00[N](ThrtDbgAllocInfo(int, unsigned char)+0x35)[0x5a6679]                      
dw.sapE1O_DVEBMGS00[N](ThrtDbgPrepareRemoteSession(int, unsigned short, unsigned char, int)+0x27b)                                     
...

In parallel, following entries may appear in work process trace files:

I *** WARNING => MtxLock 7ff3ddd549d0 EGPHX owner=X deadlock ? [mtxxx.c 566]


Read more...

Environment

Kernel 7.49 and higher releases

Product

SAP NetWeaver all versions

Keywords

eg/parallel_heap, EgPhAlloc, EgPhFree, crash, core, SYSTEM_CORE_DUMPED, EGPH, deadlock, MtxLock , KBA , egph1 , BC-CST-MM , Memory Management , Problem

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