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kmsg: /dev/kmsg - properly return possible copy_from_user() failure
[deliverable/linux.git]
/
kernel
/
printk.c
diff --git
a/kernel/printk.c
b/kernel/printk.c
index 50c96b5651b696766c915b57dec92b5629a78866..852269adad25afc878c3f10e7a3bf059d086cca9 100644
(file)
--- a/
kernel/printk.c
+++ b/
kernel/printk.c
@@
-389,8
+389,10
@@
static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
line = buf;
for (i = 0; i < count; i++) {
- if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len))
+ if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {
+ ret = -EFAULT;
goto out;
+ }
line += iv[i].iov_len;
}
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