Commit 22124c99 authored by Fernando Luis Vázquez Cao's avatar Fernando Luis Vázquez Cao Committed by Linus Torvalds

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
...@@ -47,6 +47,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, ...@@ -47,6 +47,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
if (!kdump_buf_page) { if (!kdump_buf_page) {
printk(KERN_WARNING "Kdump: Kdump buffer page not" printk(KERN_WARNING "Kdump: Kdump buffer page not"
" allocated\n"); " allocated\n");
kunmap_atomic(vaddr, KM_PTE0);
return -EFAULT; return -EFAULT;
} }
copy_page(kdump_buf_page, vaddr); copy_page(kdump_buf_page, vaddr);
......
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