The patch titled
LOOP_SET_CAPACITY sector_t may be narrow for bit-shfit
has been added to the -mm tree. Its filename is
loop-add-ioctl-to-resize-a-loop-device-loop_set_capacity-sector_t-may-be-narrow-for-bit-shfit.patch
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------------------------------------------------------
Subject: LOOP_SET_CAPACITY sector_t may be narrow for bit-shfit
From: "J. R. Okajima" <hooanon05@xxxxxxxxxxx>
Fixing the bug pointed out by Andrew Morton, shift loff_t instead of
sector_t since sector_t may be 32-bit.
Signed-off-by: J. R. Okajima <hooanon05@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/loop.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN drivers/block/loop.c~loop-add-ioctl-to-resize-a-loop-device-loop_set_capacity-sector_t-may-be-narrow-for-bit-shfit drivers/block/loop.c
--- a/drivers/block/loop.c~loop-add-ioctl-to-resize-a-loop-device-loop_set_capacity-sector_t-may-be-narrow-for-bit-shfit
+++ a/drivers/block/loop.c
@@ -1171,7 +1171,9 @@ static int loop_set_capacity(struct loop
if (unlikely(err))
goto out;
sec = get_capacity(lo->lo_disk);
- sz = sec << 9;
+ /* the width of sector_t may be narrow for bit-shift */
+ sz = sec;
+ sz <<= 9;
mutex_lock(&bdev->bd_mutex);
bd_set_size(bdev, sz);
mutex_unlock(&bdev->bd_mutex);
_
Patches currently in -mm which might be from hooanon05@xxxxxxxxxxx are
loop-add-ioctl-to-resize-a-loop-device.patch
loop-add-ioctl-to-resize-a-loop-device-security-check-for-loop_set_capacity.patch
loop-add-ioctl-to-resize-a-loop-device-loop_set_capacity-sector_t-may-be-narrow-for-bit-shfit.patch
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