Commit 90436d23 authored by Huacai Chen's avatar Huacai Chen
Browse files

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: 803b0fc5 ("LoongArch: Add process management")
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 2468b0e3

arch/loongarch/include/asm/ptrace.h

+1 −1
Original line number Diff line number Diff line
@@ -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