The patch titled
Subject: lib/string_helpers.c: fix infinite loop in string_get_size()
has been added to the -mm tree. Its filename is
lib-string_helpersc-fix-infinite-loop-in-string_get_size.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-string_helpersc-fix-infinite-loop-in-string_get_size.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-string_helpersc-fix-infinite-loop-in-string_get_size.patch
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------------------------------------------------------
From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Subject: lib/string_helpers.c: fix infinite loop in string_get_size()
string_get_size(1, 512, 0, ..., ...) call results in an infinite loop.
The problem is that if size == 0 when we start calculating sf_cap this
loop will never end.
The caller causing the issue is sd_read_capacity(), the problem was noticed
on Hyper-V.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/string_helpers.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN lib/string_helpers.c~lib-string_helpersc-fix-infinite-loop-in-string_get_size lib/string_helpers.c
--- a/lib/string_helpers.c~lib-string_helpersc-fix-infinite-loop-in-string_get_size
+++ a/lib/string_helpers.c
@@ -76,7 +76,7 @@ void string_get_size(u64 size, u64 blk_s
i++;
}
- sf_cap = size;
+ sf_cap = size ? size : 1;
for (j = 0; sf_cap*10 < 1000; j++)
sf_cap *= 10;
_
Patches currently in -mm which might be from vkuznets@xxxxxxxxxx are
lib-string_helpersc-fix-infinite-loop-in-string_get_size.patch
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