Commit 181a46bb authored May 27, 2024 by Alex Deucher Committed by Ye Bin May 27, 2024

drm/amdgpu/debugfs: fix error code when smc register accessors are NULL

mainline inclusion
from mainline-v6.8-rc1
commit afe58346d5d3887b3e49ff623d2f2e471f232a8d
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RE4X
CVE: CVE-2023-52817

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=afe58346d5d3887b3e49ff623d2f2e471f232a8d



--------------------------------

Should be -EOPNOTSUPP.

Fixes: 5104fdf50d32 ("drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>

parent 1365c38a

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -392,7 +392,7 @@ static ssize_t amdgpu_debugfs_regs_smc_read(struct file f, char __user buf,
		int r;

		if (!adev->smc_wreg)
		return -EPERM;
		return -EOPNOTSUPP;

		if (size & 0x3 \|\| *pos & 0x3)
		return -EINVAL;
		@@ -434,7 +434,7 @@ static ssize_t amdgpu_debugfs_regs_smc_write(struct file f, const char __user
		int r;

		if (!adev->smc_rreg)
		return -EPERM;
		return -EOPNOTSUPP;

		if (size & 0x3 \|\| *pos & 0x3)
		return -EINVAL;