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drm/amd/display: Fix memory leak

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[ Upstream commit 5d5c6dba2b ]

[why]
Resource release is needed on the error handling path
to prevent memory leak.

[how]
Fix this by adding kfree on the error handling path.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Yongzhi Liu <lyz_cs@pku.edu.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yongzhi Liu 2022-01-21 11:26:13 +00:00 committed by Greg Kroah-Hartman
parent bc2d5c0775
commit 9d0bef3cc2
1 changed files with 60 additions and 20 deletions
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80
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View file

@ -227,8 +227,10 @@ static ssize_t dp_link_settings_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -389,8 +391,10 @@ static ssize_t dp_phy_settings_read(struct file *f, char __user *buf,
break;
r = put_user((*(rd_buf + result)), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -1359,8 +1363,10 @@ static ssize_t dp_dsc_clock_en_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -1376,8 +1382,10 @@ static ssize_t dp_dsc_clock_en_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -1546,8 +1554,10 @@ static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -1563,8 +1573,10 @@ static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -1731,8 +1743,10 @@ static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -1748,8 +1762,10 @@ static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -1912,8 +1928,10 @@ static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -1929,8 +1947,10 @@ static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -2088,8 +2108,10 @@ static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -2105,8 +2127,10 @@ static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -2145,8 +2169,10 @@ static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -2162,8 +2188,10 @@ static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -2217,8 +2245,10 @@ static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -2234,8 +2264,10 @@ static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -2289,8 +2321,10 @@ static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf,
break;
}
if (!pipe_ctx)
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
@ -2306,8 +2340,10 @@ static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf,
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
@ -3459,8 +3495,10 @@ static ssize_t dcc_en_bits_read(
dc->hwss.get_dcc_en_bits(dc, dcc_en_bits);
rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL);
if (!rd_buf)
if (!rd_buf) {
kfree(dcc_en_bits);
return -ENOMEM;
}
for (i = 0; i < num_pipes; i++)
offset += snprintf(rd_buf + offset, rd_buf_size - offset,
@ -3473,8 +3511,10 @@ static ssize_t dcc_en_bits_read(
if (*pos >= rd_buf_size)
break;
r = put_user(*(rd_buf + result), buf);
if (r)
if (r) {
kfree(rd_buf);
return r; /* r = -EFAULT */
}
buf += 1;
size -= 1;
*pos += 1;