From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> vfree() is going to use sleeping lock. free_ldt_struct() may be called with disabled preemption, therefore we must use vfree_atomic() here. E.g. call trace: vfree() free_ldt_struct() destroy_context_ldt() __mmdrop() finish_task_switch() schedule_tail() ret_from_fork() Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> --- arch/x86/kernel/ldt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index 6707039..4d12cdf 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -93,7 +93,7 @@ static void free_ldt_struct(struct ldt_struct *ldt) paravirt_free_ldt(ldt->entries, ldt->size); if (ldt->size * LDT_ENTRY_SIZE > PAGE_SIZE) - vfree(ldt->entries); + vfree_atomic(ldt->entries); else free_page((unsigned long)ldt->entries); kfree(ldt); -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>