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x86/ldt: Make LDT pgtable free conditional
Andy prefers to be paranoid about the pagetable free in the error path of write_ldt(). Make it conditional and warn whenever the installment of a secondary LDT fails. Requested-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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1 changed files with 2 additions and 1 deletions
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@ -426,7 +426,8 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
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* already installed then the PTE page is already
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* populated. Mop up a half populated page table.
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*/
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free_ldt_pgtables(mm);
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if (!WARN_ON_ONCE(old_ldt))
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free_ldt_pgtables(mm);
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free_ldt_struct(new_ldt);
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goto out_unlock;
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}
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