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authorDan Carpenter <dan.carpenter@oracle.com>2014-01-21 14:39:22 -0800
committerJens Axboe <axboe@kernel.dk>2014-01-21 20:16:56 -0800
commit3f7d758b1e3c18360f955d1d5e224865c5e0b881 (patch)
tree34ceec2d6341be4d8668a257b9931c0271824431 /drivers/block/paride
parentf2fc8af41c351d11dcdd863356ff31fccf86cfed (diff)
downloadop-kernel-dev-3f7d758b1e3c18360f955d1d5e224865c5e0b881.zip
op-kernel-dev-3f7d758b1e3c18360f955d1d5e224865c5e0b881.tar.gz
drivers/block/paride/pg.c: underflow bug in pg_write()
The test here can underflow so we pass bogus lengths to the hardware. It's a static checker fix and I don't know the impact. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/paride')
-rw-r--r--drivers/block/paride/pg.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c
index 4a27b1d..2ce3dfd 100644
--- a/drivers/block/paride/pg.c
+++ b/drivers/block/paride/pg.c
@@ -581,7 +581,7 @@ static ssize_t pg_write(struct file *filp, const char __user *buf, size_t count,
if (hdr.magic != PG_MAGIC)
return -EINVAL;
- if (hdr.dlen > PG_MAX_DATA)
+ if (hdr.dlen < 0 || hdr.dlen > PG_MAX_DATA)
return -EINVAL;
if ((count - hs) > PG_MAX_DATA)
return -EINVAL;
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