diff options
Diffstat (limited to 'arch/um/kernel/skas')
| -rw-r--r-- | arch/um/kernel/skas/mmu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 78b3e9f69d5..0cd9a7a05e7 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -91,6 +91,8 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) goto out_free; } + to_mm->stub_pages = NULL; + return 0; out_free: @@ -126,6 +128,7 @@ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) pages[0] = virt_to_page(&__syscall_stub_start); pages[1] = virt_to_page(mm->context.id.stack); + mm->context.stub_pages = pages; /* dup_mmap already holds mmap_sem */ err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START, @@ -147,6 +150,8 @@ void arch_exit_mmap(struct mm_struct *mm) { pte_t *pte; + if (mm->context.stub_pages != NULL) + kfree(mm->context.stub_pages); pte = virt_to_pte(mm, STUB_CODE); if (pte != NULL) pte_clear(mm, STUB_CODE, pte); |