diff options
| author | Tomer Tayar <ttayar@habana.ai> | 2019-08-01 13:57:36 +0000 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2019-08-12 09:00:34 +0300 |
| commit | 508c5849c62d009e03f37ad0f556071fac5112f0 (patch) | |
| tree | cf830b1f50c6ace76ea924efd2e4b02fd48870eb /drivers/misc/habanalabs | |
| parent | d45331b00ddb179e291766617259261c112db872 (diff) | |
| download | linux-508c5849c62d009e03f37ad0f556071fac5112f0.tar.bz2 | |
habanalabs: Avoid double free in error flow
In case kernel context init fails during device initialization, both
hl_ctx_put() and kfree() are called, ending with a double free of the
kernel context.
Calling kfree() is needed only when a failure happens between the
allocation of the kernel context and its initialization, so move it to
there and remove it from the error flow.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs')
| -rw-r--r-- | drivers/misc/habanalabs/device.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c index 0c4894dd9c02..7a8f9d0b71b5 100644 --- a/drivers/misc/habanalabs/device.c +++ b/drivers/misc/habanalabs/device.c @@ -970,7 +970,8 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass) rc = hl_ctx_init(hdev, hdev->kernel_ctx, true); if (rc) { dev_err(hdev->dev, "failed to initialize kernel context\n"); - goto free_ctx; + kfree(hdev->kernel_ctx); + goto mmu_fini; } rc = hl_cb_pool_init(hdev); @@ -1053,8 +1054,6 @@ release_ctx: if (hl_ctx_put(hdev->kernel_ctx) != 1) dev_err(hdev->dev, "kernel ctx is still alive on initialization failure\n"); -free_ctx: - kfree(hdev->kernel_ctx); mmu_fini: hl_mmu_fini(hdev); eq_fini: |