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NVD(4): Fix NULL pointer access in nvd_sync()

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Update #4164.
This commit is contained in:
Sebastian Huber 2020-10-05 08:36:57 +02:00
parent e58e549728
commit b057293e6b
1 changed files with 14 additions and 14 deletions
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28
rtemsbsd/sys/dev/nvd/nvd.c
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@ -43,6 +43,7 @@
#include <stdatomic.h>
#include <rtems/blkdev.h>
#include <rtems/thread.h>
#define NVD_STR "nvd"
@ -208,28 +209,27 @@ nvd_request(struct nvd_disk *ndisk, rtems_blkdev_request *req,
static void
nvd_sync_completion(void *arg, const struct nvme_completion *status)
{
rtems_status_code sc;
rtems_binary_semaphore *sync;
if (nvme_completion_is_error(status)) {
sc = RTEMS_IO_ERROR;
} else {
sc = RTEMS_SUCCESSFUL;
}
rtems_blkdev_request_done(arg, sc);
sync = arg;
rtems_binary_semaphore_post(sync);
}
static int
nvd_sync(struct nvd_disk *ndisk, rtems_blkdev_request *req)
nvd_sync(struct nvd_disk *ndisk)
{
rtems_binary_semaphore sync;
int error;
error = nvme_ns_cmd_flush(ndisk->ns, nvd_sync_completion, req);
if (error != 0) {
rtems_blkdev_request_done(req, RTEMS_NO_MEMORY);
rtems_binary_semaphore_init(&sync, "nvd sync");
error = nvme_ns_cmd_flush(ndisk->ns, nvd_sync_completion, &sync);
if (error == 0) {
rtems_binary_semaphore_wait(&sync);
}
return (0);
rtems_binary_semaphore_destroy(&sync);
return (error);
}
static int
@ -244,7 +244,7 @@ nvd_ioctl(rtems_disk_device *dd, uint32_t req, void *arg)
}
if (req == RTEMS_BLKDEV_REQ_SYNC) {
return (nvd_sync(ndisk, arg));
return (nvd_sync(ndisk));
}
if (req == RTEMS_BLKIO_CAPABILITIES) {