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UPSTREAM: mm/damon: don't use strnlen() with known-bogus source length

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gcc knows the true length too, and rightfully complains.

Link: https://lkml.kernel.org/r/20210912204447.10427-1-kilobyte@angband.pl
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Cc: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 892ab4bbd063cfe7f6bbb183e6be69d9907a61de)

Bug: 228223814
Signed-off-by: Hailong Tu <tuhailong@oppo.com>
Change-Id: Ia3ad91fd9541a2e57156a999c5fe3e70efe740fb
This commit is contained in:
Adam Borowski
2021-09-24 15:43:26 -07:00
committed by Hailong Tu
parent c1a4fca349
commit b25e76d9c3
1 changed files with 8 additions and 8 deletions
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16
mm/damon/dbgfs-test.h
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@@ -20,27 +20,27 @@ static void damon_dbgfs_test_str_to_target_ids(struct kunit *test)
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_target_ids(struct kunit *test)
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_target_ids(struct kunit *test)
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_target_ids(struct kunit *test)
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);