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drm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()

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commit 4d75b9468021c73108b4439794d69e892b1d24e3 upstream.

Avoid a possible buffer overflow if size is larger than 4K.

Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f5d873f5825b40d886d03bd2aede91d4cf002434)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2024-10-23 16:52:08 -04:00 • committed by Greg Kroah-Hartman
parent f1d086c9b9
commit 7ccd781794
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
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@ -395,7 +395,7 @@ static ssize_t amdgpu_debugfs_regs_smc_read(struct file *f, char __user *buf,
if (!adev->smc_rreg)
return -EOPNOTSUPP;
if (size & 0x3 || *pos & 0x3)
if (size > 4096 || size & 0x3 || *pos & 0x3)
return -EINVAL;
while (size) {