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mm: kmemleak: scan .data.ro_after_init

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Limit the number of kmemleak false positives by including
.data.ro_after_init in memory scanning.  To achieve this we need to add
symbols for start and end of the section to the linker scripts.

The problem was been uncovered by commit 56989f6d85 ("genetlink: mark
families as __ro_after_init").

Link: http://lkml.kernel.org/r/1478274173-15218-1-git-send-email-jakub.kicinski@netronome.com
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jakub Kicinski
2016-11-10 10:46:44 -08:00
committed by Linus Torvalds
parent f773e36de3
commit d7c19b066d
4 changed files with 10 additions and 1 deletions
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2
arch/s390/kernel/vmlinux.lds.S
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@@ -62,9 +62,11 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__start_ro_after_init = .;
__start_data_ro_after_init = .;
.data..ro_after_init : {
*(.data..ro_after_init)
}
__end_data_ro_after_init = .;
EXCEPTION_TABLE(16)
. = ALIGN(PAGE_SIZE);
__end_ro_after_init = .;