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| author | Huacai Chen <chenhuacai@loongson.cn> | 2025-05-14 22:17:43 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-05-14 22:17:43 +0800 |
| commit | 90436d234230e9a950ccd87831108b688b27a234 (patch) | |
| tree | 2998090089cd414454dd801e34df8f8c668e5f25 | |
| parent | 2468b0e3d5659dfde77f081f266e1111a981efb8 (diff) | |
LoongArch: Fix MAX_REG_OFFSET calculation
Fix MAX_REG_OFFSET calculation, make it point to the last register
in 'struct pt_regs' and not to the marker itself, which could allow
regs_get_register() to return an invalid offset.
Cc: stable@vger.kernel.org
Fixes: 803b0fc5c3f2baa6e5 ("LoongArch: Add process management")
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
| -rw-r--r-- | arch/loongarch/include/asm/ptrace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/loongarch/include/asm/ptrace.h b/arch/loongarch/include/asm/ptrace.h index a5b63c84f854..e5d21e836d99 100644 --- a/arch/loongarch/include/asm/ptrace.h +++ b/arch/loongarch/include/asm/ptrace.h @@ -55,7 +55,7 @@ static inline void instruction_pointer_set(struct pt_regs *regs, unsigned long v /* Query offset/name of register from its name/offset */ extern int regs_query_register_offset(const char *name); -#define MAX_REG_OFFSET (offsetof(struct pt_regs, __last)) +#define MAX_REG_OFFSET (offsetof(struct pt_regs, __last) - sizeof(unsigned long)) /** * regs_get_register() - get register value from its offset |