From: Tom Rix trix@redhat.com
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") Signed-off-by: Tom Rix trix@redhat.com --- v2: use 'new' to hold/check the ralloc return fix commit log mistake on ralloc freeing to using input ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index 9eb9b440bd438..2f4f8c5618d81 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1676,7 +1676,7 @@ 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 { @@ -1687,7 +1687,12 @@ 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;