The patch titled
Subject: mm/damon: don't use strnlen() with known-bogus source length
has been added to the -mm tree. Its filename is
mm-damon-dont-use-strnlen-with-known-bogus-source-length.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-damon-dont-use-strnlen-with-known-bogus-source-length.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-damon-dont-use-strnlen-with-known-bogus-source-length.patch
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------------------------------------------------------
From: Adam Borowski <kilobyte@xxxxxxxxxx>
Subject: mm/damon: don't use strnlen() with known-bogus source length
gcc knows the true length too, and rightfully complains.
Link: https://lkml.kernel.org/r/20210912204447.10427-1-kilobyte@xxxxxxxxxx
Signed-off-by: Adam Borowski <kilobyte@xxxxxxxxxx>
Cc: SeongJae Park <sj38.park@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/dbgfs-test.h | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/mm/damon/dbgfs-test.h~mm-damon-dont-use-strnlen-with-known-bogus-source-length
+++ a/mm/damon/dbgfs-test.h
@@ -20,27 +20,27 @@ static void damon_dbgfs_test_str_to_targ
ssize_t nr_integers = 0, i;
question = "123";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
KUNIT_EXPECT_EQ(test, 123ul, answers[0]);
kfree(answers);
question = "123abc";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
KUNIT_EXPECT_EQ(test, 123ul, answers[0]);
kfree(answers);
question = "a123";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
kfree(answers);
question = "12 35";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
for (i = 0; i < nr_integers; i++)
@@ -48,7 +48,7 @@ static void damon_dbgfs_test_str_to_targ
kfree(answers);
question = "12 35 46";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)3, nr_integers);
for (i = 0; i < nr_integers; i++)
@@ -56,7 +56,7 @@ static void damon_dbgfs_test_str_to_targ
kfree(answers);
question = "12 35 abc 46";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
for (i = 0; i < 2; i++)
@@ -64,13 +64,13 @@ static void damon_dbgfs_test_str_to_targ
kfree(answers);
question = "";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
kfree(answers);
question = "\n";
- answers = str_to_target_ids(question, strnlen(question, 128),
+ answers = str_to_target_ids(question, strlen(question),
&nr_integers);
KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
kfree(answers);
_
Patches currently in -mm which might be from kilobyte@xxxxxxxxxx are
mm-damon-dont-use-strnlen-with-known-bogus-source-length.patch
