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| author | Mike Christie <mchristi@redhat.com> | 2018-07-23 22:07:47 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-07-31 06:17:53 +0300 |
| commit | a30b0473b62652f9b8ccb1e4f4a3a3c31d2b72b3 (patch) | |
| tree | 9a45302ea322125bb5109a0c390931c1019ee600 | |
| parent | 63d5be0f6a8053ba0c084dd6e2d5538e9376e7da (diff) | |
| download | linux-a30b0473b62652f9b8ccb1e4f4a3a3c31d2b72b3.tar.xz | |
scsi: tcmu: check if dev is configured before block/reset
Do not allow userspace to block or reset the ring until the device has been
configured. This will prevent the bug where userspace can write to those
files and access mb_addr before it has been setup.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/target/target_core_user.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index bc8121f97d65..d6b402203b20 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -2480,6 +2480,11 @@ static ssize_t tcmu_block_dev_store(struct config_item *item, const char *page, u8 val; int ret; + if (!target_dev_configured(&udev->se_dev)) { + pr_err("Device is not configured.\n"); + return -EINVAL; + } + ret = kstrtou8(page, 0, &val); if (ret < 0) return ret; @@ -2507,6 +2512,11 @@ static ssize_t tcmu_reset_ring_store(struct config_item *item, const char *page, u8 val; int ret; + if (!target_dev_configured(&udev->se_dev)) { + pr_err("Device is not configured.\n"); + return -EINVAL; + } + ret = kstrtou8(page, 0, &val); if (ret < 0) return ret; |