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[PATCH] cpuset: unsafe mm reference fix

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Fix unsafe reference to a tasks mm struct, by moving the reference inside of a
convenient nearby properly guarded code block.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Jackson 2006-03-31 02:30:51 -08:00 committed by Linus Torvalds
parent 4a01c8d5be
commit 2741a559a0
1 changed files with 2 additions and 2 deletions
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4
kernel/cpuset.c
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@ -1183,11 +1183,11 @@ static int attach_task(struct cpuset *cs, char *pidbuf, char **ppathbuf)
mm = get_task_mm(tsk); mm = get_task_mm(tsk);
if (mm) { if (mm) {
mpol_rebind_mm(mm, &to); mpol_rebind_mm(mm, &to);
if (is_memory_migrate(cs))
do_migrate_pages(mm, &from, &to, MPOL_MF_MOVE_ALL);
mmput(mm); mmput(mm);
} }
if (is_memory_migrate(cs))
do_migrate_pages(tsk->mm, &from, &to, MPOL_MF_MOVE_ALL);
put_task_struct(tsk); put_task_struct(tsk);
synchronize_rcu(); synchronize_rcu();
if (atomic_dec_and_test(&oldcs->count)) if (atomic_dec_and_test(&oldcs->count))