diff options
| author |   Jing Yangyang <jing.yangyang@zte.com.cn> | 2021-11-08 18:34:52 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-09 10:02:51 -0800 |
| commit | 118b7ee169d2e469a080bf1d2fa68cd31452bdad (patch) | |
| tree | 2bdbdd20ec1abd3b9d8e3597db66692547ac93f2 /fs/coda | |
| parent | coda: convert from atomic_t to refcount_t on coda_vm_ops->refcnt (diff) | |
| download | linux-dev-118b7ee169d2e469a080bf1d2fa68cd31452bdad.tar.xz linux-dev-118b7ee169d2e469a080bf1d2fa68cd31452bdad.zip | |
coda: use vmemdup_user to replace the open code
vmemdup_user is better than duplicating its implementation, So just
replace the open code.
fs/coda/psdev.c:125:10-18:WARNING:opportunity for vmemdup_user
The issue is detected with the help of Coccinelle.
Link: https://lkml.kernel.org/r/20210908140308.18491-9-jaharkes@cs.cmu.edu
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Jing Yangyang <jing.yangyang@zte.com.cn>
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Xin Tan <tanxin.ctf@gmail.com>
Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/coda')
| -rw-r--r-- | fs/coda/psdev.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c index 240669f51eac..7e23cb22d394 100644 --- a/fs/coda/psdev.c +++ b/fs/coda/psdev.c @@ -122,14 +122,10 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf, hdr.opcode, hdr.unique); nbytes = size; } - dcbuf = kvmalloc(nbytes, GFP_KERNEL); - if (!dcbuf) { - retval = -ENOMEM; - goto out; - } - if (copy_from_user(dcbuf, buf, nbytes)) { - kvfree(dcbuf); - retval = -EFAULT; + + dcbuf = vmemdup_user(buf, nbytes); + if (IS_ERR(dcbuf)) { + retval = PTR_ERR(dcbuf); goto out; } |