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| author |   Charlie Jenkins <charlie@rivosinc.com> | 2025-02-24 18:42:21 -0800 |
|---|---|---|
| committer |   Alexandre Ghiti <alexghiti@rivosinc.com> | 2025-03-18 13:06:05 +0000 |
| commit | bba547810c66434475d8800b3411c59ef71eafe9 (patch) | |
| tree | 875d248daa3066705644051b4b4fd5eb2c2c95dc | |
| parent | riscv: Remove duplicate CLINT_TIMER selections (diff) | |
| download | wireguard-linux-bba547810c66434475d8800b3411c59ef71eafe9.tar.xz wireguard-linux-bba547810c66434475d8800b3411c59ef71eafe9.zip | |
riscv: tracing: Fix __write_overflow_field in ftrace_partial_regs()
The size of ®s->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>
Diffstat (limited to '')
| -rw-r--r-- | arch/riscv/include/asm/ftrace.h | 2 | ||||
| -rw-r--r-- | arch/riscv/include/asm/ptrace.h | 18 |
2 files changed, 11 insertions, 9 deletions
diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h index c4721ce44ca4..ec6db1162021 100644 --- a/arch/riscv/include/asm/ftrace.h +++ b/arch/riscv/include/asm/ftrace.h @@ -207,7 +207,7 @@ ftrace_partial_regs(const struct ftrace_regs *fregs, struct pt_regs *regs) { struct __arch_ftrace_regs *afregs = arch_ftrace_regs(fregs); - memcpy(®s->a0, afregs->args, sizeof(afregs->args)); + memcpy(®s->a_regs, afregs->args, sizeof(afregs->args)); regs->epc = afregs->epc; regs->ra = afregs->ra; regs->sp = afregs->sp; diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h index b5b0adcc85c1..2910231977cb 100644 --- a/arch/riscv/include/asm/ptrace.h +++ b/arch/riscv/include/asm/ptrace.h @@ -23,14 +23,16 @@ struct pt_regs { unsigned long t2; unsigned long s0; unsigned long s1; - unsigned long a0; - unsigned long a1; - unsigned long a2; - unsigned long a3; - unsigned long a4; - unsigned long a5; - unsigned long a6; - unsigned long a7; + struct_group(a_regs, + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; + ); unsigned long s2; unsigned long s3; unsigned long s4; |