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-rw-r--r--lib/Kconfig.debug17
-rw-r--r--lib/checksum.c10
2 files changed, 24 insertions, 3 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 77e0d8b1b7c5..43173c4e0ade 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -340,8 +340,6 @@ config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
depends on DEBUG_KERNEL && EXPERIMENTAL && (X86 || ARM) && \
!MEMORY_HOTPLUG
- select DEBUG_SLAB if SLAB
- select SLUB_DEBUG if SLUB
select DEBUG_FS if SYSFS
select STACKTRACE if STACKTRACE_SUPPORT
select KALLSYMS
@@ -355,9 +353,24 @@ config DEBUG_KMEMLEAK
allocations. See Documentation/kmemleak.txt for more
details.
+ Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances
+ of finding leaks due to the slab objects poisoning.
+
In order to access the kmemleak file, debugfs needs to be
mounted (usually at /sys/kernel/debug).
+config DEBUG_KMEMLEAK_EARLY_LOG_SIZE
+ int "Maximum kmemleak early log entries"
+ depends on DEBUG_KMEMLEAK
+ range 200 2000
+ default 400
+ help
+ Kmemleak must track all the memory allocations to avoid
+ reporting false positives. Since memory may be allocated or
+ freed before kmemleak is initialised, an early log buffer is
+ used to store these actions. If kmemleak reports "early log
+ buffer exceeded", please increase this value.
+
config DEBUG_KMEMLEAK_TEST
tristate "Simple test for the kernel memory leak detector"
depends on DEBUG_KMEMLEAK
diff --git a/lib/checksum.c b/lib/checksum.c
index 12e5a1c91cda..b2e2fd468461 100644
--- a/lib/checksum.c
+++ b/lib/checksum.c
@@ -55,7 +55,11 @@ static unsigned int do_csum(const unsigned char *buff, int len)
goto out;
odd = 1 & (unsigned long) buff;
if (odd) {
+#ifdef __LITTLE_ENDIAN
result = *buff;
+#else
+ result += (*buff << 8);
+#endif
len--;
buff++;
}
@@ -71,7 +75,7 @@ static unsigned int do_csum(const unsigned char *buff, int len)
if (count) {
unsigned long carry = 0;
do {
- unsigned long w = *(unsigned long *) buff;
+ unsigned long w = *(unsigned int *) buff;
count--;
buff += 4;
result += carry;
@@ -87,7 +91,11 @@ static unsigned int do_csum(const unsigned char *buff, int len)
}
}
if (len & 1)
+#ifdef __LITTLE_ENDIAN
+ result += *buff;
+#else
result += (*buff << 8);
+#endif
result = from32to16(result);
if (odd)
result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);