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1274163035
Clobbering a lot of registers and stack slots helps exposing tail call counter overwrite bugs in JITs. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20250813121016.163375-5-iii@linux.ibm.com
19 lines
398 B
C
19 lines
398 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __BPF_TEST_UTILS_H__
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#define __BPF_TEST_UTILS_H__
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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/* Clobber as many native registers and stack slots as possible. */
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static __always_inline void clobber_regs_stack(void)
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{
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char tmp_str[] = "123456789";
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unsigned long tmp;
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bpf_strtoul(tmp_str, sizeof(tmp_str), 0, &tmp);
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__sink(tmp);
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}
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#endif
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