From: Tom Rix Date: Sun, 27 Feb 2022 15:33:42 +0000 (-0800) Subject: drm/amdgpu: Fix realloc of ptr X-Git-Tag: v5.18-rc1~134^2~3^2~55 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ca6fcfa8d4461c889636ef5dd51bdec96c6122bd;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu: Fix realloc of ptr Clang static analysis reports this error amdgpu_debugfs.c:1690:9: warning: 1st function call argument is an uninitialized value tmp = krealloc_array(tmp, i + 1, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ realloc uses tmp, so tmp can not be garbage. And the return needs to be checked. Fixes: 5ce5a584cb82 ("drm/amdgpu: add debugfs for reset registers list") Reviewed-by: Christian König Signed-off-by: Tom Rix Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index 426b63e4f1f6c..4549bfb0ee0c3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1678,7 +1678,7 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f, { struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private; char reg_offset[11]; - uint32_t *tmp; + uint32_t *new, *tmp = NULL; int ret, i = 0, len = 0; do { @@ -1689,7 +1689,12 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f, goto error_free; } - tmp = krealloc_array(tmp, i + 1, sizeof(uint32_t), GFP_KERNEL); + new = krealloc_array(tmp, i + 1, sizeof(uint32_t), GFP_KERNEL); + if (!new) { + ret = -ENOMEM; + goto error_free; + } + tmp = new; if (sscanf(reg_offset, "%X %n", &tmp[i], &ret) != 1) { ret = -EINVAL; goto error_free;