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| author | Julia Lawall <julia@diku.dk> | 2008-12-25 23:09:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-04-04 01:53:27 +0400 |
| commit | 253d3b139a5aa1a27672eab96879c7e019bdb774 (patch) | |
| tree | 094fe057f995e77411625ddfd917af546921856e /drivers/staging/go7007 | |
| parent | 41e847890acbee5db65430c1d4f8d7ac07813140 (diff) | |
| download | linux-253d3b139a5aa1a27672eab96879c7e019bdb774.tar.xz | |
Staging: go7007: introduce missing kfree
Error handling code following a kmalloc should free the allocated data.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,l;
position p1,p2;
expression *ptr != NULL;
@@
(
if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S
|
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
)
<... when != x
when != if (...) { <+...x...+> }
x->f = E
...>
(
return \(0\|<+...x...+>\|ptr\);
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/go7007')
| -rw-r--r-- | drivers/staging/go7007/s2250-board.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/staging/go7007/s2250-board.c b/drivers/staging/go7007/s2250-board.c index a60e19ce794f..d333ea2cd774 100644 --- a/drivers/staging/go7007/s2250-board.c +++ b/drivers/staging/go7007/s2250-board.c @@ -167,6 +167,7 @@ static int write_reg(struct i2c_client *client, u8 reg, u8 value) usb = go->hpi_context; if (down_interruptible(&usb->i2c_lock) != 0) { printk(KERN_INFO "i2c lock failed\n"); + kfree(buf); return -EINTR; } rc = go7007_usb_vendor_request(go, 0x55, dev_addr, |