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fs/vfs: check buffer count and pointer for iovec

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There are iovecs provided by user such as readv().

Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
This commit is contained in:
wangjianyu3 2025-06-07 23:11:32 +08:00 • committed by Xiang Xiao
parent 89df084b0e
commit 5e94d4482b
2 changed files with 24 additions and 0 deletions
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12
fs/vfs/fs_read.c
View file

@ -164,6 +164,18 @@ ssize_t file_readv(FAR struct file *filep,
DEBUGASSERT(filep); DEBUGASSERT(filep);
inode = filep->f_inode; inode = filep->f_inode;
/* Check buffer count and pointer for iovec */
if (iovcnt == 0)
{
return 0;
}
if (iov == NULL)
{
return -EFAULT;
}
/* Are all iov_base accessible? */ /* Are all iov_base accessible? */
for (ret = 0; ret < iovcnt; ret++) for (ret = 0; ret < iovcnt; ret++)

12
fs/vfs/fs_write.c
View file

@ -153,6 +153,18 @@ ssize_t file_writev(FAR struct file *filep,
return -EACCES; return -EACCES;
} }
/* Check buffer count and pointer for iovec */
if (iovcnt == 0)
{
return 0;
}
if (iov == NULL)
{
return -EFAULT;
}
/* Are all iov_base accessible? */ /* Are all iov_base accessible? */
for (ret = 0; ret < iovcnt; ret++) for (ret = 0; ret < iovcnt; ret++)