Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=38ad2ed08d89a4b830a03131fa73e4ef3e98d9f4 Commit: 38ad2ed08d89a4b830a03131fa73e4ef3e98d9f4 Parent: f4d2781731e846c2f01dd85e71883d120860c6dd Author: Paul Fulghum <[EMAIL PROTECTED]> AuthorDate: Sat Jun 16 10:15:55 2007 -0700 Committer: Linus Torvalds <[EMAIL PROTECTED]> CommitDate: Sat Jun 16 13:16:15 2007 -0700
tty: restore locked ioctl file op Restore tty locked ioctl handler which was replaced with an unlocked ioctl handler in hung_up_tty_fops by the patch: commit e10cc1df1d2014f68a4bdcf73f6dd122c4561f94 Author: Paul Fulghum <[EMAIL PROTECTED]> Date: Thu May 10 22:22:50 2007 -0700 tty: add compat_ioctl This was reported in: [Bug 8473] New: Oops: 0010 [1] SMP The bug is caused by switching to hung_up_tty_fops in do_tty_hangup. An ioctl call can be waiting on BLK after testing for existence of the locked ioctl handler in the normal tty fops, but before calling the locked ioctl handler. If a hangup occurs at that point, the locked ioctl fop is NULL and an oops occurs. (akpm: we can remove my debugging code from do_ioctl() now, but it'll be OK to do that for 2.6.23) Signed-off-by: Paul Fulghum <[EMAIL PROTECTED]> Cc: Alan Cox <[EMAIL PROTECTED]> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> --- drivers/char/tty_io.c | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 3752edc..a96f26a 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -1173,8 +1173,14 @@ static unsigned int hung_up_tty_poll(struct file * filp, poll_table * wait) return POLLIN | POLLOUT | POLLERR | POLLHUP | POLLRDNORM | POLLWRNORM; } -static long hung_up_tty_ioctl(struct file * file, - unsigned int cmd, unsigned long arg) +static int hung_up_tty_ioctl(struct inode * inode, struct file * file, + unsigned int cmd, unsigned long arg) +{ + return cmd == TIOCSPGRP ? -ENOTTY : -EIO; +} + +static long hung_up_tty_compat_ioctl(struct file * file, + unsigned int cmd, unsigned long arg) { return cmd == TIOCSPGRP ? -ENOTTY : -EIO; } @@ -1222,8 +1228,8 @@ static const struct file_operations hung_up_tty_fops = { .read = hung_up_tty_read, .write = hung_up_tty_write, .poll = hung_up_tty_poll, - .unlocked_ioctl = hung_up_tty_ioctl, - .compat_ioctl = hung_up_tty_ioctl, + .ioctl = hung_up_tty_ioctl, + .compat_ioctl = hung_up_tty_compat_ioctl, .release = tty_release, }; - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html