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slightly reduce lossage in gdm72xx 

* filp_close() needs non-NULL second argument only if it'd been in descriptor
table
* opened files have non-NULL dentries, TYVM
* ... and those dentries are positive - it's kinda hard to open a file that
doesn't exist.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-07-22 21:09:14 +04:00
parent 32aecdd365
commit 09fada5b5f
2 changed files with 12 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/staging/gdm72xx/sdio_boot.c
View File

@ -67,9 +67,8 @@ static int download_image(struct sdio_func *func, char *img_name)
return -ENOENT; return -ENOENT;
} }
if (filp->f_dentry) inode = filp->f_dentry->d_inode;
inode = filp->f_dentry->d_inode; if (!S_ISREG(inode->i_mode)) {
if (!inode || !S_ISREG(inode->i_mode)) {
printk(KERN_ERR "Invalid file type: %s\n", img_name); printk(KERN_ERR "Invalid file type: %s\n", img_name);
ret = -EINVAL; ret = -EINVAL;
goto out; goto out;
@ -124,7 +123,7 @@ static int download_image(struct sdio_func *func, char *img_name)
pno++; pno++;
} }
out: out:
filp_close(filp, current->files); filp_close(filp, NULL);
return ret; return ret;
} }

22
drivers/staging/gdm72xx/usb_boot.c
View File

@ -174,14 +174,12 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
filp = filp_open(img_name, O_RDONLY | O_LARGEFILE, 0); filp = filp_open(img_name, O_RDONLY | O_LARGEFILE, 0);
if (IS_ERR(filp)) { if (IS_ERR(filp)) {
printk(KERN_ERR "Can't find %s.\n", img_name); printk(KERN_ERR "Can't find %s.\n", img_name);
set_fs(fs);
ret = -ENOENT; ret = -ENOENT;
goto restore_fs; goto restore_fs;
} }
if (filp->f_dentry) inode = filp->f_dentry->d_inode;
inode = filp->f_dentry->d_inode; if (!S_ISREG(inode->i_mode)) {
if (!inode || !S_ISREG(inode->i_mode)) {
printk(KERN_ERR "Invalid file type: %s\n", img_name); printk(KERN_ERR "Invalid file type: %s\n", img_name);
ret = -EINVAL; ret = -EINVAL;
goto out; goto out;
@ -263,7 +261,7 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
ret = -EINVAL; ret = -EINVAL;
} }
out: out:
filp_close(filp, current->files); filp_close(filp, NULL);
restore_fs: restore_fs:
set_fs(fs); set_fs(fs);
@ -323,13 +321,11 @@ static int em_download_image(struct usb_device *usbdev, char *path,
goto restore_fs; goto restore_fs;
} }
if (filp->f_dentry) { inode = filp->f_dentry->d_inode;
inode = filp->f_dentry->d_inode; if (!S_ISREG(inode->i_mode)) {
if (!inode || !S_ISREG(inode->i_mode)) { printk(KERN_ERR "Invalid file type: %s\n", path);
printk(KERN_ERR "Invalid file type: %s\n", path); ret = -EINVAL;
ret = -EINVAL; goto out;
goto out;
}
} }
buf = kmalloc(DOWNLOAD_CHUCK + pad_size, GFP_KERNEL); buf = kmalloc(DOWNLOAD_CHUCK + pad_size, GFP_KERNEL);
@ -365,7 +361,7 @@ static int em_download_image(struct usb_device *usbdev, char *path,
goto out; goto out;
out: out:
filp_close(filp, current->files); filp_close(filp, NULL);
restore_fs: restore_fs:
set_fs(fs); set_fs(fs);