github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-29 17:43:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

x86/hyperv: Fix error pointer dereference

Browse Source 
The function idle_thread_get() can return an error pointer and is not
checked for it. Add check for error pointer.

Detected by Smatch:
arch/x86/hyperv/hv_vtl.c:126 hv_vtl_bringup_vcpu() error:
'idle' dereferencing possible ERR_PTR()

Fixes: 2b4b90e053 ("x86/hyperv: Use per cpu initial stack for vtl context")
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Ethan Tidmore 2026-02-18 13:09:03 -06:00 committed by Wei Liu
parent fe9f15983c
commit 705d01c8d7
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/hyperv/hv_vtl.c
View File

@ -110,7 +110,7 @@ static void hv_vtl_ap_entry(void)
static int hv_vtl_bringup_vcpu(u32 target_vp_index, int cpu, u64 eip_ignored)
{
u64 status;
u64 status, rsp, rip;
int ret = 0;
struct hv_enable_vp_vtl *input;
unsigned long irq_flags;
@ -123,9 +123,11 @@ static int hv_vtl_bringup_vcpu(u32 target_vp_index, int cpu, u64 eip_ignored)
struct desc_struct *gdt;
struct task_struct *idle = idle_thread_get(cpu);
u64 rsp = (unsigned long)idle->thread.sp;
if (IS_ERR(idle))
return PTR_ERR(idle);
u64 rip = (u64)&hv_vtl_ap_entry;
rsp = (unsigned long)idle->thread.sp;
rip = (u64)&hv_vtl_ap_entry;
native_store_gdt(&gdt_ptr);
store_idt(&idt_ptr);