On 02/29, Michal Hocko wrote:
quoted hunk ↗ jump to hunk
@@ -267,7 +267,10 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
if (!vma)
return -ENOMEM;
- down_write(&mm->mmap_sem);
+ if (down_write_killable(&mm->mmap_sem)) {
+ err = -EINTR;
+ goto err_free;
+ }
vma->vm_mm = mm;
I won't argue, but this looks unnecessary. Nobody else can see this new mm,
down_write() can't block.
In fact I think we can just remove down_write/up_write here. Except perhaps
there is lockdep_assert_held() somewhere in these paths.
Oleg.