Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() | netdev | Ratatoskr

[PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Dan Carpenter <hidden> · 2025-01-13
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Alexander Lobakin <aleksander.lobakin@intel.com> · 2025-01-13
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Dan Carpenter <hidden> · 2025-01-14
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Alexander Lobakin <aleksander.lobakin@intel.com> · 2025-01-14
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Dan Carpenter <hidden> · 2025-01-14
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · Alexander Lobakin <aleksander.lobakin@intel.com> · 2025-01-15
Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output() · patchwork-bot+netdevbpf@kernel.org · 2025-01-14

Re: [PATCH net] nfp: bpf: prevent integer overflow in nfp_bpf_event_output()

From: Alexander Lobakin <aleksander.lobakin@intel.com>
Date: 2025-01-13 12:32:34
Also in: bpf, kernel-janitors, lkml

From: Dan Carpenter <redacted>
Date: Mon, 13 Jan 2025 09:18:39 +0300

The "sizeof(struct cmsg_bpf_event) + pkt_size + data_size" math could
potentially have an integer wrapping bug on 32bit systems.  Check for

Not in practice I suppose? Do we need to fix "never" bugs?

this and return an error.

Fixes: 9816dd35ecec ("nfp: bpf: perf event output helpers support")
Signed-off-by: Dan Carpenter <redacted>

Thanks,
Olek