CVE-2021-47305

In the Linux kernel, the following vulnerability has been resolved: dma-buf/sync_file: Don't leak fences on merge failure Each add_fence() call does a dma_fence_get() on the relevant fence. In the error path, we weren't calling dma_fence_put() so all those fences got leaked. Also, in the krealloc_array failure case, we weren't freeing the fences array. Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.

• linux linux kernel (>= 4.9 < 4.14.241) • linux linux kernel (>= 4.15 < 4.19.199) • linux linux kernel (>= 4.20 < 5.4.135) • linux linux kernel (>= 5.5 < 5.10.53) • linux linux kernel (>= 5.11 < 5.13.5) • linux linux kernel 5.14