diff options
Diffstat (limited to 'arch/x86/kernel/ldt.c')
| -rw-r--r-- | arch/x86/kernel/ldt.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index 579cc4a66fdf..26d713ecad34 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -421,7 +421,14 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode) */ error = map_ldt_struct(mm, new_ldt, old_ldt ? !old_ldt->slot : 0); if (error) { - free_ldt_struct(old_ldt); + /* + * This only can fail for the first LDT setup. If an LDT is + * already installed then the PTE page is already + * populated. Mop up a half populated page table. + */ + if (!WARN_ON_ONCE(old_ldt)) + free_ldt_pgtables(mm); + free_ldt_struct(new_ldt); goto out_unlock; } |