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[PATCH] file: modify struct fown_struct to use a struct pid

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File handles can be requested to send sigio and sigurg to processes.  By
tracking the destination processes using struct pid instead of pid_t we make
the interface safe from all potential pid wrap around problems.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman
2006-10-02 02:17:15 -07:00
committed by Linus Torvalds
parent bde0d2c98b
commit 609d7fa956
8 changed files with 59 additions and 34 deletions
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2
kernel/futex.c
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@@ -1527,7 +1527,7 @@ static int futex_fd(u32 __user *uaddr, int signal)
filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
if (signal) {
err = f_setown(filp, current->pid, 1);
err = __f_setown(filp, task_pid(current), PIDTYPE_PID, 1);
if (err < 0) {
goto error;
}