diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-26 18:28:36 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-26 18:28:36 +0300 |
| commit | b8bc3bde9c8c90500c648627d53f846642ff8639 (patch) | |
| tree | 0c3ed82848a25948206556bc699a10d30bd18d07 /lib/dynamic_debug.c | |
| parent | 171b5682aa8597174e80ec4128c87538103f2213 (diff) | |
| parent | 9abc2a08a7d665b02bdde974fd6c44aae86e923e (diff) | |
| download | linux-b8bc3bde9c8c90500c648627d53f846642ff8639.tar.xz | |
Merge tag 'kvm-s390-master-4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: Fixes for kvm/master (targeting 4.5)
1. Fallout of some bigger floating point/vector rework in s390
- memory leak -> stable 4.3+
- memory overwrite -> stable 4.4+
2. enable KVM-VFIO for s390
Diffstat (limited to 'lib/dynamic_debug.c')
| -rw-r--r-- | lib/dynamic_debug.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index e3952e9c8ec0..fe42b6ec3f0c 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -657,14 +657,9 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf, pr_warn("expected <%d bytes into control\n", USER_BUF_PAGE); return -E2BIG; } - tmpbuf = kmalloc(len + 1, GFP_KERNEL); - if (!tmpbuf) - return -ENOMEM; - if (copy_from_user(tmpbuf, ubuf, len)) { - kfree(tmpbuf); - return -EFAULT; - } - tmpbuf[len] = '\0'; + tmpbuf = memdup_user_nul(ubuf, len); + if (IS_ERR(tmpbuf)) + return PTR_ERR(tmpbuf); vpr_info("read %d bytes from userspace\n", (int)len); ret = ddebug_exec_queries(tmpbuf, NULL); |