diff options
| author | John Allen <john.allen@amd.com> | 2020-03-03 16:57:23 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-12 15:00:12 +0300 |
| commit | 1f14b57ffc0adcbba0cf35214b0a6129ceae9d09 (patch) | |
| tree | a675171177195ece13b36c3b30c2f8cded38c348 /drivers/crypto/ccp | |
| parent | 7548bf8c17d84607c106bd45d81834afd95a2edb (diff) | |
| download | linux-1f14b57ffc0adcbba0cf35214b0a6129ceae9d09.tar.xz | |
crypto: ccp - Cleanup misc_dev on sev_exit()
Explicitly free and clear misc_dev in sev_exit(). Since devm_kzalloc()
associates misc_dev with the first device that gets probed, change from
devm_kzalloc() to kzalloc() and explicitly free memory in sev_exit() as
the first device probed is not guaranteed to be the last device released.
To ensure that the variable gets properly set to NULL, remove the local
definition of misc_dev.
Fixes: 200664d5237f ("crypto: ccp: Add Secure Encrypted Virtualization (SEV) command support")
Signed-off-by: John Allen <john.allen@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp')
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index e467860f797d..aa591dae067c 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -896,9 +896,9 @@ EXPORT_SYMBOL_GPL(sev_guest_df_flush); static void sev_exit(struct kref *ref) { - struct sev_misc_dev *misc_dev = container_of(ref, struct sev_misc_dev, refcount); - misc_deregister(&misc_dev->misc); + kfree(misc_dev); + misc_dev = NULL; } static int sev_misc_init(struct sev_device *sev) @@ -916,7 +916,7 @@ static int sev_misc_init(struct sev_device *sev) if (!misc_dev) { struct miscdevice *misc; - misc_dev = devm_kzalloc(dev, sizeof(*misc_dev), GFP_KERNEL); + misc_dev = kzalloc(sizeof(*misc_dev), GFP_KERNEL); if (!misc_dev) return -ENOMEM; |