id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
10434	Assertion Failed crash under heavy disk IO	level7		"Hi, when my Guest VM is under heavy disk IO (doing `svn update` of a large working directory) it randomly crashes (1-2 times a day) with the following error in the log file:

{{{
16:25:49.040 AsyncCompletion: Task 0x007fc5fb991480 completed after 15 seconds
16:25:49.040 AsyncCompletion: Task 0x007fc5fb9916c0 completed after 15 seconds
16:25:49.040 AsyncCompletion: Task 0x007fc5fb991680 completed after 15 seconds
16:25:50.913 AHCI#0: Canceled read at offset 11987676672 (114688 bytes left) returned rc=VINF_SUCCESS
16:25:50.913 
16:25:50.913 !!Assertion Failed!!
16:25:50.913 Expression: pSgBuf->cbSegLeft <= 5 * _1M && (uintptr_t)pSgBuf->pvSegCur >= (uintptr_t)pSgBuf->paSegs[pSgBuf->idxSeg].pvSeg && (uintptr_t)pSgBuf->pvSegCur + pSgBuf->cbSegLeft <= (uintptr_t)pSgBuf->paSegs[pSgBuf->idxSeg].pvSeg + pSgBuf->paSegs[pSgBuf->idxSeg].cbSeg
16:25:50.913 Location  : /home/vbox/vbox-4.1.12/src/VBox/Runtime/common/misc/sg.cpp(54) void* sgBufGet(RTSGBUF*, size_t*)
16:25:50.913 pSgBuf->idxSeg=0 pSgBuf->cSegs=1 pSgBuf->pvSegCur=00007fc5f4ab1000 pSgBuf->cbSegLeft=65536 pSgBuf->paSegs[0].pvSeg=000000000176c330 pSgBuf->paSegs[0].cbSeg=114688
}}}

 * Host: Ubuntu 10.10 64bit
 * Guest: Ubuntu 8.04 64bit"	defect	closed	other	VirtualBox 4.1.12	duplicate			Linux	Linux