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drm/amdgpu: Fix even more out of bound writes from debugfs

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CVE-2021-42327 was fixed by:

commit f23750b5b3
Author: Thelford Williams <tdwilliamsiv@gmail.com>
Date:   Wed Oct 13 16:04:13 2021 -0400

    drm/amdgpu: fix out of bounds write

but amdgpu_dm_debugfs.c contains more of the same issue so fix the
remaining ones.

v2:
	* Add missing fix in dp_max_bpc_write (Harry Wentland)

Fixes: 918698d5c2 ("drm/amd/display: Return the number of bytes parsed than allocated")
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Patrik Jakobsson 2021-10-27 16:27:30 +02:00 committed by Alex Deucher
parent defbbcd99f
commit 3f4e54bd31
1 changed files with 9 additions and 9 deletions
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18
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View file

@ -487,7 +487,7 @@ static ssize_t dp_phy_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)) {
@ -639,7 +639,7 @@ static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __us
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)) {
@ -914,7 +914,7 @@ static ssize_t dp_dsc_passthrough_set(struct file *f, const char __user *buf,
return -ENOSPC;
}
if (parse_write_buffer_into_params(wr_buf, size,
if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
&param, buf,
max_param_num,
&param_nums)) {
@ -1211,7 +1211,7 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *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)) {
@ -1396,7 +1396,7 @@ static ssize_t dp_dsc_clock_en_write(struct file *f, const char __user *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)) {
@ -1581,7 +1581,7 @@ static ssize_t dp_dsc_slice_width_write(struct file *f, const char __user *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)) {
@ -1766,7 +1766,7 @@ static ssize_t dp_dsc_slice_height_write(struct file *f, const char __user *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)) {
@ -1944,7 +1944,7 @@ static ssize_t dp_dsc_bits_per_pixel_write(struct file *f, const char __user *bu
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)) {
@ -2382,7 +2382,7 @@ static ssize_t dp_max_bpc_write(struct file *f, const char __user *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)) {