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| author | David Miller <davem@davemloft.net> | 2007-07-27 22:58:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-28 19:42:22 -0700 |
| commit | 778f3dd5a13c9e1642e0b2efea4b769387a70afa (patch) | |
| tree | 7a137adb91dcadf3e7b6756869ab73683ee41268 /fs/proc | |
| parent | 040b3a2df2dd26c3e401823f3b0ce3fe99e966c5 (diff) | |
| download | linux-stable-778f3dd5a13c9e1642e0b2efea4b769387a70afa.tar.gz linux-stable-778f3dd5a13c9e1642e0b2efea4b769387a70afa.tar.bz2 linux-stable-778f3dd5a13c9e1642e0b2efea4b769387a70afa.zip | |
Fix procfs compat_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@davemloft.net>
Acked-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/inode.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 94e2c1adf184..a5b0dfd89a17 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; } |