Description
In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix memory leak on last export_udmabuf() error path In export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a dma_buf owning the udmabuf has already been created; but the error handling in udmabuf_create() will tear down the udmabuf without doing anything about the containing dma_buf. This leaves a dma_buf in memory that contains a dangling pointer; though that doesn't seem to lead to anything bad except a memory leak. Fix it by moving the dma_buf_fd() call out of export_udmabuf() so that we can give it different error handling. Note that the shape of this code changed a lot in commit 5e72b2b41a21 ("udmabuf: convert udmabuf driver to use folios"); but the memory leak seems to have existed since the introduction of udmabuf.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
fbb0de795078190a9834b3409e4b009cfb18a6d4 to < 00ebdef47994206f60546929a0f6f63285497272affectedfbb0de795078190a9834b3409e4b009cfb18a6d4 to < e469922fbdf6ad729e5dc8d49289b5036a0ecdf8affectedfbb0de795078190a9834b3409e4b009cfb18a6d4 to < c9fc8428d4255c2128da9c4d5cd92e554d0150cfaffectedfbb0de795078190a9834b3409e4b009cfb18a6d4 to < f49856f525acd5bef52ae28b7da2e001bbe7439eaffected
Linux Linux
Default version status: affected
4.20affected0 to < 4.20unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.7 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected