github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 10:33:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

riscv: kvm: add null pointer check for vector datap

Browse Source 
Add WARN_ON check before accessing cntx->vector.datap in
kvm_riscv_vcpu_vreg_addr() to detect potential null pointer
dereferences early, consistent with the pattern used in
kvm_riscv_vcpu_vector_reset().

This helps catch initialization issues where vector context
allocation may have failed.

Signed-off-by: Yufeng Wang <wangyufeng@kylinos.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260317114759.53165-1-r4o5m6e8o@163.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yufeng Wang 2026-03-17 19:47:59 +08:00 committed by Anup Patel
parent 198c7ce980
commit 9b33ab1e8c
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/riscv/kvm/vcpu_vector.c
View File

@ -130,6 +130,7 @@ static int kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu,
} else if (reg_num <= KVM_REG_RISCV_VECTOR_REG(31)) {
if (reg_size != vlenb)
return -EINVAL;
WARN_ON(!cntx->vector.datap);
*reg_addr = cntx->vector.datap +
(reg_num - KVM_REG_RISCV_VECTOR_REG(0)) * vlenb;
} else {