diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-06-20 11:10:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-24 16:23:25 -0700 |
| commit | 4640a3f2bff64b808bdedadcddf882aa4606f374 (patch) | |
| tree | 1b7fdf74ef6ff7eab4df7a39a1756f8f5c5024ca /drivers/fmc | |
| parent | c2955da0e101c3432ae21945e5d77786adf1f094 (diff) | |
| download | lwn-4640a3f2bff64b808bdedadcddf882aa4606f374.tar.gz lwn-4640a3f2bff64b808bdedadcddf882aa4606f374.zip | |
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>
Diffstat (limited to 'drivers/fmc')
| -rw-r--r-- | drivers/fmc/fmc-chardev.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/fmc/fmc-chardev.c b/drivers/fmc/fmc-chardev.c index b0710393ede6..cc031db2d2a3 100644 --- a/drivers/fmc/fmc-chardev.c +++ b/drivers/fmc/fmc-chardev.c @@ -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; } |