LoongArch: Adjust user_regset_copyin parameter to the correct offset

Ensure that user_watch_state can be set correctly by the user.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/kernel/ptrace.c b/arch/loongarch/kernel/ptrace.c
index bb2e1af135ea773f43576bbd5c5835355a13b3ef..5fcffb45236764ee75fce64c2508003b5773bffc 100644 (file)
--- a/arch/loongarch/kernel/ptrace.c
+++ b/arch/loongarch/kernel/ptrace.c
@@ -546,7 +546,7 @@ static int hw_break_get(struct task_struct *target,
 
        membuf_write(&to, &info, sizeof(info));
 
-       /* (address, ctrl) registers */
+       /* (address, mask, ctrl) registers */
        while (to.left) {
                ret = ptrace_hbp_get_addr(note_type, target, idx, &addr);
                if (ret)
@@ -584,7 +584,7 @@ static int hw_break_set(struct task_struct *target,
        offset = offsetof(struct user_watch_state, dbg_regs);
        user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);
 
-       /* (address, ctrl) registers */
+       /* (address, mask, ctrl) registers */
        limit = regset->n * regset->size;
        while (count && offset < limit) {
                if (count < PTRACE_HBP_ADDR_SZ)
@@ -604,7 +604,7 @@ static int hw_break_set(struct task_struct *target,
                        break;
 
                ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &mask,
-                                        offset, offset + PTRACE_HBP_ADDR_SZ);
+                                        offset, offset + PTRACE_HBP_MASK_SZ);
                if (ret)
                        return ret;
 
@@ -613,8 +613,8 @@ static int hw_break_set(struct task_struct *target,
                        return ret;
                offset += PTRACE_HBP_MASK_SZ;
 
-               ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &mask,
-                                        offset, offset + PTRACE_HBP_MASK_SZ);
+               ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ctrl,
+                                        offset, offset + PTRACE_HBP_CTRL_SZ);
                if (ret)
                        return ret;