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FMC: fix error handling in probe() function 

The call to kzalloc() wasn't checked.
The dev_info() message dereferenced freed memory on error.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2013-06-20 11:10:18 +03:00 committed by Greg Kroah-Hartman
parent c2955da0e1
commit 4640a3f2bf
1 changed files with 11 additions and 6 deletions
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17
drivers/fmc/fmc-chardev.c
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@ -136,6 +136,8 @@ static int fc_probe(struct fmc_device *fmc)
/* Create a char device: we want to create it anew */
fc = kzalloc(sizeof(*fc), GFP_KERNEL);
if (!fc)
return -ENOMEM;
fc->fmc = fmc;
fc->misc.minor = MISC_DYNAMIC_MINOR;
fc->misc.fops = &fc_fops;
@ -143,15 +145,18 @@ static int fc_probe(struct fmc_device *fmc)
spin_lock(&fc_lock);
ret = misc_register(&fc->misc);
if (ret < 0) {
kfree(fc->misc.name);
kfree(fc);
} else {
list_add(&fc->list, &fc_devices);
}
if (ret < 0)
goto err_unlock;
list_add(&fc->list, &fc_devices);
spin_unlock(&fc_lock);
dev_info(&fc->fmc->dev, "Created misc device \"%s\"\n",
fc->misc.name);
return 0;
err_unlock:
spin_unlock(&fc_lock);
kfree(fc->misc.name);
kfree(fc);
return ret;
}