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f6606a44bc
On CPUs that support BTI, the indirect jump selftest triggers a kernel
panic because there is no BTI instructions at the indirect jump targets.
Fix it by emitting a BTI instruction for each indirect jump target.
For reference, below is a sample panic log.
Internal error: Oops - BTI: 0000000036000003 [#1] SMP
...
Call trace:
bpf_prog_2e5f1c71c13ac3e0_big_jump_table+0x54/0xf8 (P)
bpf_prog_run_pin_on_cpu+0x140/0x468
bpf_prog_test_run_syscall+0x280/0x3b8
bpf_prog_test_run+0x22c/0x2c0
Fixes: f4a66cf1cb ("bpf: arm64: Add support for indirect jumps")
Reviewed-by: Anton Protopopov <a.s.protopopov@gmail.com> # v8
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com> # v12
Acked-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/r/20260416064341.151802-6-xukuohai@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>