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0458097957
Add a test to verify that the sleepable tracing prog cannot attach to a '__x64_sys' prefix prog target. When CONFIG_FUNCTION_ERROR_INJECTION is disabled, without the fix, the test would trigger the BUG: [ 3.460756] BUG: sleeping function called from invalid context at kernel/bpf/trampoline.c:1324 Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20260805150810.34907-3-leon.hwang@linux.dev
19 lines
318 B
C
19 lines
318 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char LICENSE[] SEC("license") = "GPL";
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void *user_ptr;
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int retval;
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SEC("fentry.s")
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int BPF_PROG(fentry_xdp)
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{
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char buff[64];
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retval = bpf_copy_from_user(buff, sizeof(buff), user_ptr);
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return 0;
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}
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