Merge tag 'hwmon-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...

[linux-2.6-microblaze.git] / fs / ioctl.c

diff --git a/fs/ioctl.c b/fs/ioctl.c
index 282d45b..5e80b40 100644 (file)
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -55,6 +55,7 @@ EXPORT_SYMBOL(vfs_ioctl);
 static int ioctl_fibmap(struct file *filp, int __user *p)
 {
        struct inode *inode = file_inode(filp);
+       struct super_block *sb = inode->i_sb;
        int error, ur_block;
        sector_t block;
 
@@ -71,6 +72,13 @@ static int ioctl_fibmap(struct file *filp, int __user *p)
        block = ur_block;
        error = bmap(inode, &block);
 
+       if (block > INT_MAX) {
+               error = -ERANGE;
+               pr_warn_ratelimited("[%s/%d] FS: %s File: %pD4 would truncate fibmap result\n",
+                                   current->comm, task_pid_nr(current),
+                                   sb->s_id, filp);
+       }
+
        if (error)
                ur_block = 0;
        else