From 34d3d0e65e3a84bc76e75431528e41f9f94bd6cf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 21 Apr 2019 18:45:28 -0400 Subject: [PATCH] do_vfs_ioctl(): use saner types casting to pointer to int, only to pass that to function that takes pointer to void and uses it as pointer to structure is really asking for trouble. "Some pointer, I'm not sure what to" is spelled "void *", not "int *"; use that. And declare the functions we are passing that pointer to as taking the pointer to what they really want to access. Signed-off-by: Al Viro Signed-off-by: Arnd Bergmann --- fs/ioctl.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/ioctl.c b/fs/ioctl.c index 3118da0de158..e14bd85f3bc6 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -175,10 +175,9 @@ static int fiemap_check_ranges(struct super_block *sb, return 0; } -static int ioctl_fiemap(struct file *filp, unsigned long arg) +static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap) { struct fiemap fiemap; - struct fiemap __user *ufiemap = (struct fiemap __user *) arg; struct fiemap_extent_info fieinfo = { 0, }; struct inode *inode = file_inode(filp); struct super_block *sb = inode->i_sb; @@ -245,7 +244,8 @@ fdput: return ret; } -static long ioctl_file_clone_range(struct file *file, void __user *argp) +static long ioctl_file_clone_range(struct file *file, + struct file_clone_range __user *argp) { struct file_clone_range args; @@ -585,9 +585,9 @@ static int ioctl_fsthaw(struct file *filp) return thaw_super(sb); } -static int ioctl_file_dedupe_range(struct file *file, void __user *arg) +static int ioctl_file_dedupe_range(struct file *file, + struct file_dedupe_range __user *argp) { - struct file_dedupe_range __user *argp = arg; struct file_dedupe_range *same = NULL; int ret; unsigned long size; @@ -636,7 +636,7 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg) { int error = 0; - int __user *argp = (int __user *)arg; + void __user *argp = (void __user *)arg; struct inode *inode = file_inode(filp); switch (cmd) { @@ -675,13 +675,13 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, break; case FS_IOC_FIEMAP: - return ioctl_fiemap(filp, arg); + return ioctl_fiemap(filp, argp); case FIGETBSZ: /* anon_bdev filesystems may not have a block size */ if (!inode->i_sb->s_blocksize) return -EINVAL; - return put_user(inode->i_sb->s_blocksize, argp); + return put_user(inode->i_sb->s_blocksize, (int __user *)argp); case FICLONE: return ioctl_file_clone(filp, arg, 0, 0, 0);