Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate() Temporarily clear the preallocation flag when explicitly requesting allocations. Pre-existing allocations are already counted against the request through mas_node_count_gfp(), but the allocations will not happen if the MA_STATE_PREALLOC flag is set. This flag is meant to avoid re-allocating in bulk allocation mode, and to detect issues with preallocation calculations. The MA_STATE_PREALLOC flag should also always be set on zero allocations so that detection of underflow allocations will print a WARN_ON() during consumption. User visible effect of this flaw is a WARN_ON() followed by a null pointer dereference when subsequent requests for larger number of nodes is ignored, such as the vma merge retry in mmap_region() caused by drivers altering the vma flags (which happens in v6.6, at least)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before d69cd64bd5af41c6fd409313504089970edaf02f; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before e63032e66bca1d06e600033f3369ba3db3af0870; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before cf95f8426f889949b738f51ffcd72884411f3a6a; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before 9e32f4700867abbd5d19abfcf698dbd0d2ce36a4; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before fba46a5d83ca8decb338722fb4899026d8d9ead2 |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.1.146 through 6.1.*; unaffected 6.6.99 through 6.6.*; unaffected 6.12.36 through 6.12.*; unaffected 6.15.5 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d69cd64bd5af41c6fd409313504089970edaf02f
- https://git.kernel.org/stable/c/e63032e66bca1d06e600033f3369ba3db3af0870
- https://git.kernel.org/stable/c/cf95f8426f889949b738f51ffcd72884411f3a6a
- https://git.kernel.org/stable/c/9e32f4700867abbd5d19abfcf698dbd0d2ce36a4
- https://git.kernel.org/stable/c/fba46a5d83ca8decb338722fb4899026d8d9ead2
ADP enrichment
No English description supplied.
No English description supplied.