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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>
This commit is contained in:
Wang Kai 2015-09-08 15:03:41 -07:00 committed by Linus Torvalds
parent e397589125
commit 21cd3a6047
1 changed files with 2 additions and 1 deletions
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3
mm/kmemleak.c
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@ -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)) { if (crt_early_log >= ARRAY_SIZE(early_log)) {
crt_early_log++;
kmemleak_disable(); kmemleak_disable();
return; return;
} }
@ -1882,7 +1883,7 @@ void __init kmemleak_init(void)
object_cache = KMEM_CACHE(kmemleak_object, SLAB_NOLEAKTRACE); object_cache = KMEM_CACHE(kmemleak_object, SLAB_NOLEAKTRACE);
scan_area_cache = KMEM_CACHE(kmemleak_scan_area, 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 " pr_warning("Early log buffer exceeded (%d), please increase "
"DEBUG_KMEMLEAK_EARLY_LOG_SIZE\n", crt_early_log); "DEBUG_KMEMLEAK_EARLY_LOG_SIZE\n", crt_early_log);