| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.4 258/459] drm: remove the newline for CRC source name. | Date | Fri, 14 Feb 2020 10:58:28 -0500 |
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From: Dingchen Zhang <dingchen.zhang@amd.com>
[ Upstream commit 72a848f5c46bab4c921edc9cbffd1ab273b2be17 ]
userspace may transfer a newline, and this terminating newline is replaced by a '\0' to avoid followup issues.
'len-1' is the index to replace the newline of CRC source name.
v3: typo fix (Sam)
v2: update patch subject, body and format. (Sam)
Cc: Leo Li <sunpeng.li@amd.com> Cc: Harry Wentland <Harry.Wentland@amd.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Dingchen Zhang <dingchen.zhang@amd.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190610134751.14356-1-dingchen.zhang@amd.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/drm_debugfs_crc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c index be1b7ba92ffe1..6a626c82e264b 100644 --- a/drivers/gpu/drm/drm_debugfs_crc.c +++ b/drivers/gpu/drm/drm_debugfs_crc.c @@ -140,8 +140,8 @@ static ssize_t crc_control_write(struct file *file, const char __user *ubuf, if (IS_ERR(source)) return PTR_ERR(source); - if (source[len] == '\n') - source[len] = '\0'; + if (source[len - 1] == '\n') + source[len - 1] = '\0'; ret = crtc->funcs->verify_crc_source(crtc, source, &values_cnt); if (ret) -- 2.20.1
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