Re: [PATCH] elf: sanitize objname in _dl_signal_error

[Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>]

On 02/04/24 11:42, H.J. Lu wrote:
> On Tue, Apr 2, 2024 at 7:38 AM Jiangfeng Xiao <xiaojiangfeng@huawei.com> wrote:
>>
>>
>>
>> On 2024/4/1 21:50, Adhemerval Zanella Netto wrote:
>>
>>
>>> How did you trigger this issue, either from user provided ABI (dlfcn.h)
>>> or some some internal usage (if any)? If this is a user-visible issue
>>> it will require a bug report and a reproducer.
>>>
>>
>> Thanks for your reply.
>>
>>
>> The following are my reproduction cases:
>>
>> ```
>> #include <dlfcn.h>
>>
>> int main(void)
>> {
>>         (void)dlopen("not_exist.so", -1);
>>
>>         return 0;
>> }
>>
>> ```
>>
>> However, this case cannot be reproduced in a common environment.
>>
>> I reproduced this issue in the arm32 environment.
>> Glibc in the environment is compiled using the Clang compiler.
> 
> Is it a Clang bug?

This does seems to be a code generation issue, I just tested by azanella/clang
branch with both clang 16 (official package) and clang master and there is not
issue with dlopen non existent files.