Hello:
This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Wed, 8 May 2024 12:35:12 -0700 you wrote:
> This patch fixes an integer overflow warning raised by GCC in
> xdp_prognum1 of progs/test_xdp_vlan.c:
>
> GCC-BPF [test_maps] test_xdp_vlan.bpf.o
> progs/test_xdp_vlan.c: In function 'xdp_prognum1':
> progs/test_xdp_vlan.c:163:25: error: integer overflow in expression
> '(short int)(((__builtin_constant_p((int)vlan_hdr->h_vlan_TCI)) != 0
> ? (int)(short unsigned int)((short int)((int)vlan_hdr->h_vlan_TCI
> << 8 >> 8) << 8 | (short int)((int)vlan_hdr->h_vlan_TCI << 0 >> 8
> << 0)) & 61440 : (int)__builtin_bswap16(vlan_hdr->h_vlan_TCI)
> & 61440) << 8 >> 8) << 8' of type 'short int' results in '0' [-Werror=overflow]
> 163 | bpf_htons((bpf_ntohs(vlan_hdr->h_vlan_TCI) & 0xf000)
> | ^~~~~~~~~
>
> [...]
Here is the summary with links:
- [bpf-next] bpf: avoid gcc overflow warning in test_xdp_vlan.c
https://git.kernel.org/bpf/bpf-next/c/792a04bed41c
You are awesome, thank you!
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