[PATCH] drm/amd/display: Fix a potential buffer overflow in 'dp_dsc_clock_en_read()'

[Srinivasan Shanmugam]

Tell snprintf() to store at most 10 bytes in the output buffer
instead of 30.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:1508 
dp_dsc_clock_en_read() error: snprintf() is printing too much 30 vs 10

Fixes: c06e09b76639 ("drm/amd/display: Add DSC parameters logging to debugfs")
Cc: Alex Hung <alex.h...@amd.com>
Cc: Qingqing Zhuo <qingqing.z...@amd.com>
Cc: Rodrigo Siqueira <rodrigo.sique...@amd.com>
Cc: Aurabindo Pillai <aurabindo.pil...@amd.com>
Cc: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmu...@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 68a846323912..85fc6181303b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -1483,7 +1483,7 @@ static ssize_t dp_dsc_clock_en_read(struct file *f, char 
__user *buf,
        const uint32_t rd_buf_size = 10;
        struct pipe_ctx *pipe_ctx;
        ssize_t result = 0;
-       int i, r, str_len = 30;
+       int i, r, str_len = 10;
 
        rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
 
-- 
2.34.1