[PATCH] Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf.

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From: docfate111 <tdwilliamsiv@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: harry.wentland@amd.com, sunpeng.li@amd.com
Subject: [PATCH] Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf.
Date: Mon, 11 Oct 2021 16:21:58 -0400	[thread overview]
Message-ID: <20211011202158.GA19208@t> (raw)

Signed-off-by: docfate111 <tdwilliamsiv@gmail.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 87daa78a32b8..17f2756a64dc 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
@@ -263,7 +263,7 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
 	if (!wr_buf)
 		return -ENOSPC;

-	if (parse_write_buffer_into_params(wr_buf, size,
+	if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
 					   (long *)param, buf,
 					   max_param_num,
 					   &param_nums)) {
-- 
2.25.1

next             reply	other threads:[~2021-10-12  6:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-11 20:21 docfate111 [this message]
2021-10-11 20:24 ` Fwd: [PATCH] Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf T. Williams
2021-10-12  7:18   ` Christian König
2021-10-12 20:41     ` T. Williams
2021-10-12 20:56       ` Alex Deucher

find likely ancestor, descendant, or conflicting patches for this message:
( dfblob:87daa78a32b dfblob:17f2756a64d )
 OR (
bs:"[PATCH] Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf." )
	(help)

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