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Date: Fri, 27 Jul 2007 22:58:37 -0700 (PDT) From: David Miller <davem@...emloft.net> To: torvalds@...ux-foundation.org CC: linux-kernel@...r.kernel.org, adobriyan@...ru Subject: [PATCH]: Fix procfs compat_ioctl regression. Alexey reviewed the patch and is fine with this fix. Please apply, thanks! [PROCFS]: Fix ioctl regression. It is important to only provide the compat_ioctl method if the downstream de->proc_fops does too, otherwise this utterly confuses the logic in fs/compat_ioctl.c and we end up doing the wrong thing. Signed-off-by: David S. Miller <davem@...emloft.net> Acked-by: Alexey Dobriyan <adobriyan@...ru> diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 94e2c1a..a5b0dfd 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -386,6 +386,19 @@ static const struct file_operations proc_reg_file_ops = { .release = proc_reg_release, }; +#ifdef CONFIG_COMPAT +static const struct file_operations proc_reg_file_ops_no_compat = { + .llseek = proc_reg_llseek, + .read = proc_reg_read, + .write = proc_reg_write, + .poll = proc_reg_poll, + .unlocked_ioctl = proc_reg_unlocked_ioctl, + .mmap = proc_reg_mmap, + .open = proc_reg_open, + .release = proc_reg_release, +}; +#endif + struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, struct proc_dir_entry *de) { @@ -413,8 +426,15 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, if (de->proc_iops) inode->i_op = de->proc_iops; if (de->proc_fops) { - if (S_ISREG(inode->i_mode)) - inode->i_fop = &proc_reg_file_ops; + if (S_ISREG(inode->i_mode)) { +#ifdef CONFIG_COMPAT + if (!de->proc_fops->compat_ioctl) + inode->i_fop = + &proc_reg_file_ops_no_compat; + else +#endif + inode->i_fop = &proc_reg_file_ops; + } else inode->i_fop = de->proc_fops; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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