Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc The low 6 bits of cp_hqd_eop_control store the base-2 logarithm of the EOP ring size. This was calculated as ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1 But ffs can in theory return 1 or 0, so this could underflow (although in practice the ring buffer size cannot be less than 4096). Change this to ffs(q->eop_ring_buffer_size / sizeof(unsigned int) / 4) using properties of logarithms. (cherry picked from commit 4f18c56630383c14bfc6b2d65f88f2f895d2121a)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 14328aa58ce523a59996c5a82681c43ec048cc33 before 82e1b8299c6da02ce02185c208d2fdf7572b5ea1; affected 14328aa58ce523a59996c5a82681c43ec048cc33 before c883d0a132d430ef7ebb23fd94323be94d0fbdb8 |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.