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ARC: bpf: Correct conditional check in 'check_jmp_32'

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[ Upstream commit 7dd9eb6ba8 ]

The original code checks 'if (ARC_CC_AL)', which is always true since
ARC_CC_AL is a constant. This makes the check redundant and likely
obscures the intention of verifying whether the jump is conditional.

Updates the code to check cond == ARC_CC_AL instead, reflecting the intent
to differentiate conditional from unconditional jumps.

Suggested-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Acked-by: Shahab Vahedi <list+bpf@vahedi.org>
Signed-off-by: Hardevsinh Palaniya <hardevsinh.palaniya@siliconsignals.io>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hardevsinh Palaniya 2024-11-13 19:11:18 +05:30 committed by Greg Kroah-Hartman
parent 4be7ad1f9c
commit 83d32ae689
1 changed files with 1 additions and 1 deletions
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2
arch/arc/net/bpf_jit_arcv2.c
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@ -2916,7 +2916,7 @@ bool check_jmp_32(u32 curr_off, u32 targ_off, u8 cond)
addendum = (cond == ARC_CC_AL) ? 0 : INSN_len_normal;
disp = get_displacement(curr_off + addendum, targ_off);
if (ARC_CC_AL)
if (cond == ARC_CC_AL)
return is_valid_far_disp(disp);
else
return is_valid_near_disp(disp);