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| author |   Martin Kelly <martin@martingkelly.com> | 2014-10-16 20:48:11 -0700 |
|---|---|---|
| committer |   David Vrabel <david.vrabel@citrix.com> | 2014-10-23 16:24:02 +0100 |
| commit | 1ea644c8f93f3435760d8b88c25d56475d8b7778 (patch) | |
| tree | 000d6b70443cc643dd3cb6facba4bca6b767db4c /arch/x86 | |
| parent | x86/xen: Fix incorrect per_cpu accessor in xen_clocksource_read() (diff) | |
| download | linux-dev-1ea644c8f93f3435760d8b88c25d56475d8b7778.tar.xz linux-dev-1ea644c8f93f3435760d8b88c25d56475d8b7778.zip | |
x86/xen: panic on bad Xen-provided memory map
Panic if Xen provides a memory map with 0 entries. Although this is
unlikely, it is better to catch the error at the point of seeing the map
than later on as a symptom of some other crash.
Signed-off-by: Martin Kelly <martkell@amazon.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/setup.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index af7216128d93..29834b3fd87f 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -595,6 +595,7 @@ char * __init xen_memory_setup(void) rc = 0; } BUG_ON(rc); + BUG_ON(memmap.nr_entries == 0); /* * Xen won't allow a 1:1 mapping to be created to UNUSABLE |