* NULL pointer dereference in libbpf
@ 2021-06-18 9:14 Anton Ivanov
2021-06-18 9:24 ` Toke Høiland-Jørgensen
0 siblings, 1 reply; 3+ messages in thread
From: Anton Ivanov @ 2021-06-18 9:14 UTC (permalink / raw)
To: netdev
https://elixir.bootlin.com/linux/latest/source/tools/lib/bpf/bpf.c#L91
A string is copied to a pointer destination which has been memset to zero a few lines above.
Brgds,
--
Anton R. Ivanov
https://www.kot-begemot.co.uk/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: NULL pointer dereference in libbpf
2021-06-18 9:14 NULL pointer dereference in libbpf Anton Ivanov
@ 2021-06-18 9:24 ` Toke Høiland-Jørgensen
2021-06-18 9:54 ` Anton Ivanov
0 siblings, 1 reply; 3+ messages in thread
From: Toke Høiland-Jørgensen @ 2021-06-18 9:24 UTC (permalink / raw)
To: Anton Ivanov, netdev
Anton Ivanov <anton.ivanov@kot-begemot.co.uk> writes:
> https://elixir.bootlin.com/linux/latest/source/tools/lib/bpf/bpf.c#L91
>
> A string is copied to a pointer destination which has been memset to
> zero a few lines above.
No, it isn't. attr.map_name is an array...
-Toke
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: NULL pointer dereference in libbpf
2021-06-18 9:24 ` Toke Høiland-Jørgensen
@ 2021-06-18 9:54 ` Anton Ivanov
0 siblings, 0 replies; 3+ messages in thread
From: Anton Ivanov @ 2021-06-18 9:54 UTC (permalink / raw)
To: Toke Høiland-Jørgensen, netdev
On 18/06/2021 10:24, Toke Høiland-Jørgensen wrote:
> Anton Ivanov <anton.ivanov@kot-begemot.co.uk> writes:
>
>> https://elixir.bootlin.com/linux/latest/source/tools/lib/bpf/bpf.c#L91
>>
>> A string is copied to a pointer destination which has been memset to
>> zero a few lines above.
>
> No, it isn't. attr.map_name is an array...
Apologies, looking at the wrong struct definition (bpf_create_map_attr instead of bpf_attr).
Best Regards,
>
> -Toke
>
>
--
Anton R. Ivanov
https://www.kot-begemot.co.uk/
^ permalink raw reply [flat|nested] 3+ messages in thread
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