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authorWang Kai <morgan.wang@huawei.com>2015-09-09 01:03:41 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 01:35:28 +0300
commit21cd3a604797c2774676926a95a3d17d4cd5cbb3 (patch)
tree83e3cd390ae01824f4d7aff599cfd292927e2549 /mm
parente3975891254e08d220ddcafca93a0e05d9560bfb (diff)
downloadlinux-21cd3a604797c2774676926a95a3d17d4cd5cbb3.tar.xz
kmemleak: record accurate early log buffer count and report when exceeded
In log_early function, crt_early_log should also count once when 'crt_early_log >= ARRAY_SIZE(early_log)'. Otherwise the reported count from kmemleak_init is one less than 'actual number'. Then, in kmemleak_init, if early_log buffer size equal actual number, kmemleak will init sucessful, so change warning condition to 'crt_early_log > ARRAY_SIZE(early_log)'. Signed-off-by: Wang Kai <morgan.wang@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/kmemleak.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index cf79f110157c..f532f6a37b55 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -838,6 +838,7 @@ static void __init log_early(int op_type, const void *ptr, size_t size,
}
if (crt_early_log >= ARRAY_SIZE(early_log)) {
+ crt_early_log++;
kmemleak_disable();
return;
}
@@ -1882,7 +1883,7 @@ void __init kmemleak_init(void)
object_cache = KMEM_CACHE(kmemleak_object, SLAB_NOLEAKTRACE);
scan_area_cache = KMEM_CACHE(kmemleak_scan_area, SLAB_NOLEAKTRACE);
- if (crt_early_log >= ARRAY_SIZE(early_log))
+ if (crt_early_log > ARRAY_SIZE(early_log))
pr_warning("Early log buffer exceeded (%d), please increase "
"DEBUG_KMEMLEAK_EARLY_LOG_SIZE\n", crt_early_log);