Host crashes with PSOD with error: Corruption in dlmalloc

Products

• VMware vSphere ESXi

Issue/Introduction

• PSOD(Purple Screen of Death) is seen in DLM_Malloc which checking if SCSI Target is Hot unplugged

PANIC bora/vmkernel/main/dlmalloc.c:3933 - Corruption in dlmalloc

Module(s) involved in panic: [vfat ]
cr0=0x80010031 cr2=0x943707b520 cr3=0x81b8e57000 cr4=0x142768
FMS=06/cf/2 uCode=0x210002a9
*PCPU51:2100070/iof ltd-emcjiraf
PCPU 0: VVVVVSVVVVVVSVVVVVVUVVVVUVVVVVVVVVVVVUVVVUIVVVVVVUVUSVVVUVSVVSUV
PCPU 64: VVVVUVSSSVVSSVSVVSUUUVVVUVVSUVVU
Code start: 0x42000a200000 VMK uptime: 8:22:07:06.526
0x4539ea91a4e0: [0x42000a37c280]PanicvPanic Int@vmkernel#nover+0x20c stack: 0x1129bd063
0x4539ea91a590: [0x42000a37c9fc]Panic_NoSave@vmkernel#nover+0x4d stack: 0x4539ea91a5f0
0x4539ea91a5f0:[0x42000a332454]DLM_malloc@vnkernel#nover+0xf4d stack: 0x2c
0x4539ea91a650 : [0x42000a33b51c]Heap_AlignWithTimeoutAndRA@vmkernel#nover+0x121 stack: 0xea91a76a
0x4539ea91a6d0: [0x42000a6ce0d1]SCSIDeviceCheckHotUnplug@vmkernel#nover+0x2e stack: 0x430a5f04b640

 

 

Environment

Esx 8.0.3

Cause

Some part of the heap memory belonging to the storage stack is zeroed out by the RP4VM application . This discrepancy in the memory triggers a panic in the ESXi. 

Resolution

It is recommended to engage the hardware vendor for further analysis and resolution.