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Commit 22124c99 authored by Fernando Luis Vázquez Cao's avatar Fernando Luis Vázquez Cao Committed by Linus Torvalds
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kmap leak fix for x86_32 kdump 



copy_oldmem_page should not return leaving a page frame from the
previous kernel mapped.

Signed-off-by: default avatarFernando Luis Vázquez Cao <fernando@oss.ntt.co.jp>
Acked-by: default avatarVivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3305a6bc

arch/x86/kernel/crash_dump_32.c

+1 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, 
		if (!kdump_buf_page) {

			printk(KERN_WARNING "Kdump: Kdump buffer page not"

				" allocated\n");

			kunmap_atomic(vaddr, KM_PTE0);

			return -EFAULT;

		}

		copy_page(kdump_buf_page, vaddr);