[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 1/5] xen/bitmap: fix bitmap_fill with zero-sized bitmap
When bitmap_fill(..., 0) is called, do not try to write anything. Before this patch, it tried to write almost LONG_MAX, surely overwriting something. Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> --- xen/include/xen/bitmap.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/include/xen/bitmap.h b/xen/include/xen/bitmap.h index fe3c720..0430c1c 100644 --- a/xen/include/xen/bitmap.h +++ b/xen/include/xen/bitmap.h @@ -126,6 +126,8 @@ static inline void bitmap_fill(unsigned long *dst, int nbits) size_t nlongs = BITS_TO_LONGS(nbits); switch (nlongs) { + case 0: + break; default: memset(dst, -1, (nlongs - 1) * sizeof(unsigned long)); /* fall through */ -- git-series 0.9.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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