Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix trampoline stack size for 128-bit arguments btf_distill_func_proto() accepts a function argument up to 16 bytes, so a 128-bit scalar such as __int128 reaches the x86 trampoline with arg_size == 16. But the current implementation assumes an __int128 argument only needs one register, so the register save area is under-allocated and save_args() overwrites adjacent stack slots. Compute the register count from arg_size for all arguments to fix it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 before 7f96bf0d24b2acc0732906b60a10f06783f2470d; affected a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 before 4aed2346fa9b88d458eeb8c01123f3c07585a675; affected a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 before 40f3bfbbb222b92278f3797614b70f68d46824ac; affected a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 before a6d7d7a253c550e74b0651897fe313c2f9b2301f; affected a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 before 814cba835ef648e0c5eb79505c96c0493b29eea6 |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7f96bf0d24b2acc0732906b60a10f06783f2470d
- https://git.kernel.org/stable/c/4aed2346fa9b88d458eeb8c01123f3c07585a675
- https://git.kernel.org/stable/c/40f3bfbbb222b92278f3797614b70f68d46824ac
- https://git.kernel.org/stable/c/a6d7d7a253c550e74b0651897fe313c2f9b2301f
- https://git.kernel.org/stable/c/814cba835ef648e0c5eb79505c96c0493b29eea6