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| author | Mark Brown <broonie@kernel.org> | 2016-02-22 20:12:13 +0900 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-22 20:12:13 +0900 |
| commit | 8174b35f1d9b54b740a935410c7b3891e3e2a119 (patch) | |
| tree | 95427a4dd7248c41547a9a8d4afcfe7aa9a3a9fd /lib/dynamic_debug.c | |
| parent | fcde5a7eca1a28d3f7158399809cb01f83bd0114 (diff) | |
| parent | 81f70ba233d5f660e1ea5fe23260ee323af5d53a (diff) | |
Merge tag 'v4.5-rc5' into asoc-mtk
Linux 4.5-rc5
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); |