Commit 3159ed57 authored by Ira Weiny's avatar Ira Weiny Committed by Linus Torvalds
Browse files

fs/coredump: use kmap_local_page() 

In dump_user_range() there is no reason for the mapping to be global.  Use
kmap_local_page() rather than kmap.

Link: https://lkml.kernel.org/r/20210203223328.558945-1-ira.weiny@intel.com


Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f9c8bc46

fs/coredump.c

+2 −2
Original line number Diff line number Diff line
@@ -897,10 +897,10 @@ int dump_user_range(struct coredump_params *cprm, unsigned long start, 
		 */

		page = get_dump_page(addr);

		if (page) {

			void *kaddr = kmap(page);

			void *kaddr = kmap_local_page(page);



			stop = !dump_emit(cprm, kaddr, PAGE_SIZE);

			kunmap(page);

			kunmap_local(kaddr);

			put_page(page);

		} else {

			stop = !dump_skip(cprm, PAGE_SIZE);