riscv: tracing: Fix __write_overflow_field in ftrace_partial_regs()

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The size of &regs->a0 is unknown, causing the error:

../include/linux/fortify-string.h:571:25: warning: call to
'__write_overflow_field' declared with attribute warning: detected write
beyond size of field (1st parameter); maybe use struct_group()?
[-Wattribute-warning]

Fix this by wrapping the required registers in pt_regs with
struct_group() and reference the group when doing the offending
memcpy().

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20250224-fix_ftrace_partial_regs-v1-1-54b906417e86@rivosinc.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>

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Charlie Jenkins 2025-02-24 18:42:21 -08:00 • committed by Alexandre Ghiti

parent 72770690e0

commit bba547810c

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arch/riscv/include/asm/ftrace.h

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18

arch/riscv/include/asm/ptrace.h

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