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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2011-11-16 09:21:50 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2011-11-16 09:21:50 +0100 |
| commit | a2c2a0e668e26e020731ce2a40e6474d1d37210a (patch) | |
| tree | 81f0f6aabffb97fe6c0ec06fd7042c5147cceb9c /drivers/block | |
| parent | bio: change some signed vars to unsigned (diff) | |
| download | linux-a2c2a0e668e26e020731ce2a40e6474d1d37210a.tar.xz linux-a2c2a0e668e26e020731ce2a40e6474d1d37210a.zip | |
paride: fix potential information leak in pg_read()
Smatch has a new check for Rosenberg type information leaks where structs
are copied to the user with uninitialized stack data in them. i In this
case, the pg_write_hdr struct has a hole in it.
struct pg_write_hdr {
char magic; /* 0 1 */
char func; /* 1 1 */
/* XXX 2 bytes hole, try to pack */
int dlen; /* 4 4 */
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Tim Waugh <tim@cyberelk.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/paride/pg.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c index 6b9a2000d56a..a79fb4f7ff62 100644 --- a/drivers/block/paride/pg.c +++ b/drivers/block/paride/pg.c @@ -630,6 +630,7 @@ static ssize_t pg_read(struct file *filp, char __user *buf, size_t count, loff_t if (dev->status & 0x10) return -ETIME; + memset(&hdr, 0, sizeof(hdr)); hdr.magic = PG_MAGIC; hdr.dlen = dev->dlen; copy = 0; |