diff options
| author | Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2017-06-06 11:43:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 13:16:24 +0200 |
| commit | 8fe4345d6a1dd0402639c1e06821e89ef4fa9783 (patch) | |
| tree | 80c37ed0a36b70e8afc9cc4b099a5cd726e4bc9b /drivers | |
| parent | f0d2e153147ece8c1027b276b71b8ffca0245440 (diff) | |
cxl: Fix error path on bad ioctl
commit cec422c11caeeccae709e9942058b6b644ce434c upstream.
Fix error path if we can't copy user structure on CXL_IOCTL_START_WORK
ioctl. We shouldn't unlock the context status mutex as it was not
locked (yet).
Fixes: 0712dc7e73e5 ("cxl: Fix issues when unmapping contexts")
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/cxl/file.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c index 783337d22f36..10a02934bfc0 100644 --- a/drivers/misc/cxl/file.c +++ b/drivers/misc/cxl/file.c @@ -158,11 +158,8 @@ static long afu_ioctl_start_work(struct cxl_context *ctx, /* Do this outside the status_mutex to avoid a circular dependency with * the locking in cxl_mmap_fault() */ - if (copy_from_user(&work, uwork, - sizeof(struct cxl_ioctl_start_work))) { - rc = -EFAULT; - goto out; - } + if (copy_from_user(&work, uwork, sizeof(work))) + return -EFAULT; mutex_lock(&ctx->status_mutex); if (ctx->status != OPENED) { |