[PATCH] staging: unisys: virtpci: virtpci: Fix for possible null pointer dereference
Dan Carpenter
dan.carpenter at oracle.com
Fri Jan 30 12:39:42 UTC 2015
Run your patches through checkpatch.pl.
On Thu, Jan 29, 2015 at 07:50:26PM +0100, Rickard Strandqvist wrote:
> - if (dprivate != NULL)
> + if (dprivate != NULL) {
This is a double negative. Just say "if (dprivate) {". Actually just
reverse the test and remove the bogus printk. Say:
if (!dprivate)
return 0;
But *actually* just remove the test entirely because it can never be
NULL. Same for virtpci_driver_attr_store().
Btw, if you have the smatch cross function database set up then you can
figure out this sort of thing by using:
$ smdb.py virtpci_driver_attr_store
It says that:
fs/sysfs/file.c | sysfs_kf_write | (struct sysfs_ops)->store | PARAM_VALUE | 0 | $ | 4096-2117777777777777777
So this is called from sysfs_kf_write() and parameter zero is a valid
pointer.
regards,
dan carpenter
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