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x86/mm: Fix range check in tlbflush debugfs interface
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
arch
/
x86
/
mm
/
tlb.c
diff --git
a/arch/x86/mm/tlb.c
b/arch/x86/mm/tlb.c
index
613cd83
..
a085c56
100644
(file)
--- a/
arch/x86/mm/tlb.c
+++ b/
arch/x86/mm/tlb.c
@@
-320,7
+320,7
@@
static ssize_t tlbflush_write_file(struct file *file,
if (kstrtos8(buf, 0, &shift))
return -EINVAL;
- if (shift
> 64
)
+ if (shift
< -1 || shift >= BITS_PER_LONG
)
return -EINVAL;
tlb_flushall_shift = shift;