Bug 203305

Summary:	[testmgr] New test framework is causing a hang with CONFIG_HARDENED_USERCOPY_PAGESPAN enabled
Product:	Other	Reporter:	Ivan Bulatovic (combuster)
Component:	Modules	Assignee:	other_modules
Status:	NEW ---
Severity:	high	CC:	herbert
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	5.1.0-rc1	Subsystem:
Regression:	No	Bisected commit-id:

Description Ivan Bulatovic 2019-04-14 16:56:42 UTC

After bisecting to commit 4e7babba30d820c4195b1d58cf51dce3c22ecf2b:

crypto: testmgr - convert skcipher testing to use testvec_configs

and getting a glimpse of the error during one of the bisect runs (otherwise I didn't get any errors, kernel hangs without any warnings before KMS kicks in), HARDENED_USERCOPY_PAGESPAN probably does what it's supposed to do and the system hangs up. 

Now, it does state that it should be used only to find such use-cases before they eventually get removed and this one is new (or dusted off an old one), I don't have a trace - but I thought I should report it all the same.

Should be easy enough to reproduce...

Ivan

Comment 1 Ivan Bulatovic 2019-04-14 17:02:10 UTC

Adding Herbert, couldn't find Eric with 100% certainty...