Re: [PATCH stable 4.14] bpf, arm: fix emit_ldx_r and emit_mov_i using TMP_REG_1

On Wed, Dec 19, 2018 at 10:40:42PM +0100, Daniel Borkmann wrote:

From: Nicolas Schichan nschichan@freebox.fr

emit_ldx_r() and emit_a32_mov_i() were both using TMP_REG_1 and clashing with each other. Using TMP_REG_2 in emit_ldx_r() fixes the issue.

Fixes: ec19e02b343 ("ARM: net: bpf: fix LDX instructions") Cc: Russell King rmk+kernel@armlinux.org.uk Signed-off-by: Nicolas Schichan nschichan@freebox.fr Signed-off-by: Daniel Borkmann daniel@iogearbox.net

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[ Note, this has been implicitly fixed upstream by a6eccac507e ("ARM: net: bpf: 64-bit accessor functions for BPF registers"), so the fix here is a minimal stand-alone fix for 4.14. test_bpf suite runs without error after the fix. ]

Queued for 4.14, thank you.

-- Thanks, Sasha