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| H A D | bpf_jit_32.c | diff 02088d9b392f605c892894b46aa8c83e3abd0115 Sat Jan 13 16:38:18 CST 2018 Russell King <rmk+kernel@armlinux.org.uk> ARM: net: bpf: fix register saving
When an eBPF program tail-calls another eBPF program, it enters it after
the prologue to avoid having complex stack manipulations. This can lead
to kernel oopses, and similar.
Resolve this by always using a fixed stack layout, a CPU register frame
pointer, and using this when reloading registers before returning.
Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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