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| author | Takashi Iwai <tiwai@suse.de> | 2020-03-11 08:35:40 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-03-11 14:54:09 +0100 |
| commit | 9b9f2219b2c4fa3d1a41245cdc263d09a4c9ad92 (patch) | |
| tree | f118a25f1b5dc0848ac7e4e506c0c47fe7d5654e /drivers/gpu/drm/drm_sysfs.c | |
| parent | drm/ttm: Use scnprintf() for avoiding potential buffer overflow (diff) | |
| download | linux-9b9f2219b2c4fa3d1a41245cdc263d09a4c9ad92.tar.xz linux-9b9f2219b2c4fa3d1a41245cdc263d09a4c9ad92.zip | |
drm: sysfs: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200311073540.7108-1-tiwai@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_sysfs.c')
| -rw-r--r-- | drivers/gpu/drm/drm_sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 2e83c3d72af9..939f0032aab1 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -228,7 +228,7 @@ static ssize_t modes_show(struct device *device, mutex_lock(&connector->dev->mode_config.mutex); list_for_each_entry(mode, &connector->modes, head) { - written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", + written += scnprintf(buf + written, PAGE_SIZE - written, "%s\n", mode->name); } mutex_unlock(&connector->dev->mode_config.mutex); |