Description
In the Linux kernel, the following vulnerability has been resolved: erofs: preserve LZMA decoders on resize failure The pool-resize path frees each stream's old decoder before allocating its replacement. If an allocation fails after some streams have already been replaced, the failed stream is put back on the list with state == NULL. z_erofs_lzma_max_dictsize is still advanced as if the whole pool had been resized. An existing LZMA mount can select the broken stream and pass NULL to xz_dec_microlzma_reset(). A retry at the same size also skip another resize attempt. Since the global maximum was advanced, thus, the invalid state is left unrepaired. Allocate each replacement before freeing the old decoder, temporarily retaining one old decoder during allocation. Stop at the first failure and advance z_erofs_lzma_max_dictsize only after all streams satisfy the request. Record each stream's dictionary capacity so retries can skip streams already enlarged before a partial failure.
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
622ceaddb7649ca328832f50ba1400af778d75fa to < 164cdbd7ac748c4df1a0c9b435286835668c1f33affected622ceaddb7649ca328832f50ba1400af778d75fa to < db0c3465b54a16debc089b2b3bda251d26c953d0affected622ceaddb7649ca328832f50ba1400af778d75fa to < 604ce546e1b9f35b1f45588004f53fac6b2869c1affected622ceaddb7649ca328832f50ba1400af778d75fa to < 0b3c8c39e50249470f00a5f73c288b95a55ab576affected622ceaddb7649ca328832f50ba1400af778d75fa to < 38e9e07ac02a9453a117410776f1502a9980997eaffected622ceaddb7649ca328832f50ba1400af778d75fa to < 617d0d8d199ba1790c94310fd75a22d01c97a8d6affected
Linux Linux
Default version status: affected
5.16affected0 to < 5.16unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/164cdbd7ac748c4df1a0c9b435286835668c1f33 ↗
- https://git.kernel.org/stable/c/db0c3465b54a16debc089b2b3bda251d26c953d0 ↗
- https://git.kernel.org/stable/c/604ce546e1b9f35b1f45588004f53fac6b2869c1 ↗
- https://git.kernel.org/stable/c/0b3c8c39e50249470f00a5f73c288b95a55ab576 ↗
- https://git.kernel.org/stable/c/38e9e07ac02a9453a117410776f1502a9980997e ↗
- https://git.kernel.org/stable/c/617d0d8d199ba1790c94310fd75a22d01c97a8d6 ↗