LoongArch: BPF: Zero-extend bpf_tail_call() index

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commit eb71f5c433 upstream.

The bpf_tail_call() index should be treated as a u32 value. Let's
zero-extend it to avoid calling wrong BPF progs. See similar fixes
for x86 [1]) and arm64 ([2]) for more details.

  [1]: 90caccdd8c
  [2]: 16338a9b3a

Cc: stable@vger.kernel.org
Fixes: 5dc615520c ("LoongArch: Add BPF JIT support")
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Hengqi Chen 2025-12-31 15:19:20 +08:00 • committed by Greg Kroah-Hartman

parent bb92a3af3c

commit fcaafcc27b

1 changed files with 2 additions and 0 deletions

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arch/loongarch/net/bpf_jit.c

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