diff options
| author | Al Viro | 2015-12-24 00:06:05 -0500 |
|---|---|---|
| committer | Al Viro | 2016-01-04 10:26:58 -0500 |
| commit | 16e5c1fc36040e592128a164499bc25eb138a80f (patch) | |
| tree | a080bd2eea306d5815c5a9eefb46180e2bedffb2 /arch/xtensa | |
| parent | 7e935c7ca1e6c398f11edac5beabfc4348e3b3a4 (diff) | |
convert a bunch of open-coded instances of memdup_user_nul()
A _lot_ of ->write() instances were open-coding it; some are
converted to memdup_user_nul(), a lot more remain...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/platforms/iss/simdisk.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c index 3c3ace2c46b6..f58a4e6472cb 100644 --- a/arch/xtensa/platforms/iss/simdisk.c +++ b/arch/xtensa/platforms/iss/simdisk.c @@ -227,16 +227,12 @@ static ssize_t proc_read_simdisk(struct file *file, char __user *buf, static ssize_t proc_write_simdisk(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { - char *tmp = kmalloc(count + 1, GFP_KERNEL); + char *tmp = memdup_user_nul(buf, count); struct simdisk *dev = PDE_DATA(file_inode(file)); int err; - if (tmp == NULL) - return -ENOMEM; - if (copy_from_user(tmp, buf, count)) { - err = -EFAULT; - goto out_free; - } + if (IS_ERR(tmp)) + return PTR_ERR(tmp); err = simdisk_detach(dev); if (err != 0) @@ -244,8 +240,6 @@ static ssize_t proc_write_simdisk(struct file *file, const char __user *buf, if (count > 0 && tmp[count - 1] == '\n') tmp[count - 1] = 0; - else - tmp[count] = 0; if (tmp[0]) err = simdisk_attach(dev, tmp); |