TechPanelGM/kernel_xiaomi_sm8250
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

arm64: bpf: Don't use module memory for the BPF JIT CFI check.

Browse Source 
Signed-off-by: Diab Neiroukh <lazerl0rd@thezest.dev>
Change-Id: Ibe2716d57a4cb3bab3fa9d89191f7bbe9e0adc1c
This commit is contained in:
Diab Neiroukh
2021-01-14 20:32:38 +00:00
committed by Bruno Martins
parent 030d374eb9
commit 8e9cd82b78
1 changed files with 1 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
arch/arm64/net/bpf_jit_comp.c
View File

@@ -984,17 +984,10 @@ bool arch_bpf_jit_check_func(const struct bpf_prog *prog)
/*
* bpf_func must be correctly aligned and within the correct region.
* module_alloc places JIT code in the module region, unless
* ARM64_MODULE_PLTS is enabled, in which case we might end up using
* the vmalloc region too.
*/
if (unlikely(!IS_ALIGNED(func, sizeof(u32))))
return false;
if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) &&
is_vmalloc_addr(prog->bpf_func))
return true;
return (func >= MODULES_VADDR && func < MODULES_END);
return (func >= BPF_JIT_REGION_START && func < BPF_JIT_REGION_END);
}
#endif