5.15-stable review patch. If anyone has any objections, please let me know.
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From: Daniel T. Lee danieltimlee@gmail.com
commit 7244eb669397f309c3d014264823cdc9cb3f8e6b upstream.
There is currently an invalid register mapping in the s390 return address register. As the manual[1] states, the return address can be found at r14. In bpf_tracing.h, the s390 registers were named gprs(general purpose registers). This commit fixes the problem by correcting the mistyped mapping.
[1]: https://uclibc.org/docs/psABI-s390x.pdf#page=14
Fixes: 3cc31d794097 ("libbpf: Normalize PT_REGS_xxx() macro definitions") Signed-off-by: Daniel T. Lee danieltimlee@gmail.com Signed-off-by: Andrii Nakryiko andrii@kernel.org Link: https://lore.kernel.org/bpf/20221224071527.2292-7-danieltimlee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/lib/bpf/bpf_tracing.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -119,7 +119,7 @@ #define __PT_PARM3_REG gprs[4] #define __PT_PARM4_REG gprs[5] #define __PT_PARM5_REG gprs[6] -#define __PT_RET_REG grps[14] +#define __PT_RET_REG gprs[14] #define __PT_FP_REG gprs[11] /* Works only with CONFIG_FRAME_POINTER */ #define __PT_RC_REG gprs[2] #define __PT_SP_REG gprs[15]