Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 03e35b3..5412efe 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -482,31 +482,37 @@
return (int) (ptr - buffer);
}
+static int copy_from_regs(struct pt_regs *regs, void *dst, void *src, int len)
+{
+ if (user_mode(regs)) {
+ if (copy_from_user(dst, (char __user *)src, len))
+ return -EFAULT;
+ } else {
+ if (copy_from_kernel_nofault(dst, src, len))
+ return -EFAULT;
+ }
+ return 0;
+}
+
void show_code(struct pt_regs *regs)
{
char *mode = user_mode(regs) ? "User" : "Krnl";
unsigned char code[64];
char buffer[128], *ptr;
- mm_segment_t old_fs;
unsigned long addr;
int start, end, opsize, hops, i;
/* Get a snapshot of the 64 bytes surrounding the fault address. */
- old_fs = get_fs();
- set_fs(user_mode(regs) ? USER_DS : KERNEL_DS);
for (start = 32; start && regs->psw.addr >= 34 - start; start -= 2) {
addr = regs->psw.addr - 34 + start;
- if (__copy_from_user(code + start - 2,
- (char __user *) addr, 2))
+ if (copy_from_regs(regs, code + start - 2, (void *)addr, 2))
break;
}
for (end = 32; end < 64; end += 2) {
addr = regs->psw.addr + end - 32;
- if (__copy_from_user(code + end,
- (char __user *) addr, 2))
+ if (copy_from_regs(regs, code + end, (void *)addr, 2))
break;
}
- set_fs(old_fs);
/* Code snapshot useable ? */
if ((regs->psw.addr & 1) || start >= end) {
printk("%s Code: Bad PSW.\n", mode);