x86/platform/UV: Fix bug with iounmap() of the UV4 EFI System Table causing a crash
authorMike Travis <travis@sgi.com>
Mon, 1 Aug 2016 18:40:51 +0000 (13:40 -0500)
committerIngo Molnar <mingo@kernel.org>
Wed, 10 Aug 2016 13:55:38 +0000 (15:55 +0200)
commite363d24c2b997c421476c6aa00547edadf678efe
treea74a622cf1badec01f4f4bd67e98ec6ecebd1fc6
parent054f621fd5b1c7245710f5d3935c94ce6ae4b3b7
x86/platform/UV: Fix bug with iounmap() of the UV4 EFI System Table causing a crash

Save the uv_systab::size field before doing the iounmap()
of the struct pointer, to avoid a NULL dereference crash.

Tested-by: Frank Ramsay <framsay@sgi.com>
Tested-by: John Estabrook <estabrook@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Reviewed-by: Nathan Zimmer <nzimmer@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <rja@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160801184050.250424783@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/platform/uv/bios_uv.c