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| author | Arnd Bergmann <arnd@arndb.de> | 2024-02-17 13:42:38 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-02-19 11:21:55 +0300 |
| commit | e8991d1d6498f663889e99ea7fd3cb9c464cebf1 (patch) | |
| tree | b04d3c60c4d43c694a52890fddcfd53c2a23ec1e /sound/core/sound_kunit.c | |
| parent | ba00e413fa1515e4d0890803c01ebc555f500f15 (diff) | |
| download | linux-e8991d1d6498f663889e99ea7fd3cb9c464cebf1.tar.xz | |
ALSA: core: fix buffer overflow in test_format_fill_silence()
KASAN caught a buffer overflow with the hardcoded 2048 byte buffer
size, when 2080 bytes are written to it:
BUG: KASAN: slab-out-of-bounds in snd_pcm_format_set_silence+0x3bc/0x3e4
Write of size 8 at addr ffff0000c8149800 by task kunit_try_catch/1297
CPU: 0 PID: 1297 Comm: kunit_try_catch Tainted: G N 6.8.0-rc4-next-20240216 #1
Hardware name: linux,dummy-virt (DT)
Call trace:
kasan_report+0x78/0xc0
__asan_report_store_n_noabort+0x1c/0x28
snd_pcm_format_set_silence+0x3bc/0x3e4
_test_fill_silence+0xdc/0x298
test_format_fill_silence+0x110/0x228
kunit_try_run_case+0x144/0x3bc
kunit_generic_run_threadfn_adapter+0x50/0x94
kthread+0x330/0x3e8
ret_from_fork+0x10/0x20
Allocated by task 1297:
__kmalloc+0x17c/0x2f0
kunit_kmalloc_array+0x2c/0x78
test_format_fill_silence+0xcc/0x228
kunit_try_run_case+0x144/0x3bc
kunit_generic_run_threadfn_adapter+0x50/0x94
kthread+0x330/0x3e8
ret_from_fork+0x10/0x20
Replace the incorrect size with the correct length of 260 64-bit samples.
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Suggested-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Fixes: 3e39acf56ede ("ALSA: core: Add sound core KUnit test")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Acked-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20240217104311.3749655-1-arnd@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/sound_kunit.c')
| -rw-r--r-- | sound/core/sound_kunit.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/core/sound_kunit.c b/sound/core/sound_kunit.c index 5d5a7bf88de4..4212c4a20697 100644 --- a/sound/core/sound_kunit.c +++ b/sound/core/sound_kunit.c @@ -8,7 +8,8 @@ #include <sound/core.h> #include <sound/pcm.h> -#define SILENCE_BUFFER_SIZE 2048 +#define SILENCE_BUFFER_MAX_FRAMES 260 +#define SILENCE_BUFFER_SIZE (sizeof(u64) * SILENCE_BUFFER_MAX_FRAMES) #define SILENCE(...) { __VA_ARGS__ } #define DEFINE_FORMAT(fmt, pbits, wd, endianness, signd, silence_arr) { \ .format = SNDRV_PCM_FORMAT_##fmt, .physical_bits = pbits, \ @@ -165,7 +166,7 @@ static void _test_fill_silence(struct kunit *test, struct snd_format_test_data * static void test_format_fill_silence(struct kunit *test) { - u32 buf_samples[] = { 10, 20, 32, 64, 129, 260 }; + u32 buf_samples[] = { 10, 20, 32, 64, 129, SILENCE_BUFFER_MAX_FRAMES }; u8 *buffer; u32 i, j; |