From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130911042922.974649920@goodmis.org> Date: Wed, 11 Sep 2013 00:30:12 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sergey Senozhatsky , Greg Kroah-Hartman Subject: [185/251] zram: allow request end to coincide with disksize References: <20130911042707.738353451@goodmis.org> Content-Disposition: inline; filename=0185-zram-allow-request-end-to-coincide-with-disksize.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.9-rc1 stable review patch. If anyone has any objections, please let me know. ------------------ From: Sergey Senozhatsky [ Upstream commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 ] 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 Signed-off-by: Greg Kroah-Hartman Signed-off-by: Steven Rostedt --- 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 3a79d70..b9b3342 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -478,7 +478,7 @@ 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 */ -- 1.7.10.4