Vlastimil Babka 9df9516940 x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit ... On 32bit PAE kernels on 64bit hardware with enough physical bits, l1tf_pfn_limit() will overflow unsigned long. This in turn affects max_swapfile_size() and can lead to swapon returning -EINVAL. This has been observed in a 32bit guest with 42 bits physical address size, where max_swapfile_size() overflows exactly to 1 << 32, thus zero, and produces the following warning to dmesg: [ 6.396845] Truncating oversized swap area, only using 0k out of 2047996k Fix this by using unsigned long long instead. Fixes: 17dbca1193 ("x86/speculation/l1tf: Add sysfs reporting for l1tf") Fixes: 377eeaa8e1 ("x86/speculation/l1tf: Limit swap file size to MAX_PA/2") Reported-by: Dominique Leuenberger <dimstar@suse.de> Reported-by: Adrian Schroeter <adrian@suse.de> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20180820095835.5298-1-vbabka@suse.cz		2018-08-20 18:04:42 +02:00
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asm	x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit	2018-08-20 18:04:42 +02:00
uapi/asm	Merge branch 'linus' into timers/2038	2018-05-19 13:55:40 +02:00