Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a scatterlist. If dma_pool_alloc() fails while constructing the list, the current code sets buf to NULL and later dereferences it unconditionally at the end of the function: buf->next = NULL; buf->phys_next = 0; This can lead to a null-pointer dereference on allocation failure. If the failure happens after part of the descriptor chain has already been allocated and DMA-mapped, the partially constructed chain also needs to be released. Fix this by terminating the partially constructed chain on allocation failure and letting the callers unwind it via their existing cleanup paths. Also fix ablk_perform() to preserve the hook pointers before checking for failure, so partially built chains can be freed correctly.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before d4007867be42d71795b78fa7f8ce7514dda9ca83; affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before 4918b0bd7d2baafb45d87dca9e322137c96005c2; affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991; affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before 04cb00106ca4d0fa9eca24cadc4eda6036e855c8; affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d; affected 0d44dc59b2b434b29aafeae581d06f81efac7c83 before 25056329384010a8672552b134f609601dc4f80e; affected 5a80273150a8a1725fa70418d106eb1f2ee8fd2f; affected 82a8becb9c2c52fc5e67057a43aeded1f0731e7b; affected 68845515c8b11791b547a2838e22c27dfa3115ee; affected 2.6.27.22 before 2.6.28; affected 2.6.28.10 before 2.6.29; affected 2.6.29.3 before 2.6.30 |
| Linux / Linux | affected 2.6.30; unaffected 0 before 2.6.30; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d4007867be42d71795b78fa7f8ce7514dda9ca83
- https://git.kernel.org/stable/c/4918b0bd7d2baafb45d87dca9e322137c96005c2
- https://git.kernel.org/stable/c/8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991
- https://git.kernel.org/stable/c/04cb00106ca4d0fa9eca24cadc4eda6036e855c8
- https://git.kernel.org/stable/c/028a7f4f3d69e551f6bf9f728d547bbf4cfc707d
- https://git.kernel.org/stable/c/25056329384010a8672552b134f609601dc4f80e