| From | Luis Henriques <> | Subject | [PATCH 75/75] zram: allow request end to coincide with disksize | Date | Wed, 14 Aug 2013 11:37:04 +0100 |
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3.5.7.19 -stable review patch. If anyone has any objections, please let me know.
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From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 upstream.
Pass valid_io_request() checks if request end coincides with disksize (end equals bound), only fail if we attempt to read beyond the bound.
mkfs.ext2 produces numerous errors: [ 2164.632747] quiet_error: 1 callbacks suppressed [ 2164.633260] Buffer I/O error on device zram0, logical block 153599 [ 2164.633265] lost page write due to I/O error on zram0
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Thomas Backlund <tmb@mageia.org> [ luis: backported to 3.5: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/staging/zram/zram_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 1ae0610..2e88a68 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -545,7 +545,7 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio) end = start + (bio->bi_size >> SECTOR_SHIFT); bound = zram->disksize >> SECTOR_SHIFT; /* out of range range */ - if (unlikely(start >= bound || end >= bound || start > end)) + if (unlikely(start >= bound || end > bound || start > end)) return 0; /* I/O request is valid */ -- 1.8.3.2
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