linux.git/fs/exec.c, branch v2.6.15

VM: add common helper function to create the page tables

2005-11-29T22:03:14+00:00

This logic was duplicated four times, for no good reason.

Signed-off-by: Linus Torvalds

[PATCH] fix do_wait() vs exec() race

2005-11-24T00:08:39+00:00

When non-leader thread does exec, de_thread adds old leader to the init's
->children list in EXIT_ZOMBIE state and drops tasklist_lock.

This means that release_task(leader) in de_thread() is racy vs do_wait()
from init task.

I think de_thread() should set old leader's state to EXIT_DEAD instead.

Signed-off-by: Oleg Nesterov 
Cc: george anzinger 
Cc: Roland Dreier 
Cc: Ingo Molnar 
Cc: Linus Torvalds 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] add a file_permission helper

2005-11-09T15:55:59+00:00

A few more callers of permission() just want to check for a different access
pattern on an already open file.  This patch adds a wrapper for permission()
that takes a file in preparation of per-mount read-only support and to clean
up the callers a little.  The helper is not intended for new code, everything
without the interface set in stone should use vfs_permission()

Signed-off-by: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] add a vfs_permission helper

2005-11-09T15:55:58+00:00

Most permission() calls have a struct nameidata * available.  This helper
takes that as an argument and thus makes sure we pass it down for lookup
intents and prepares for per-mount read-only support where we need a struct
vfsmount for checking whether a file is writeable.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fix de_thread() vs send_group_sigqueue() race

2005-11-08T20:58:38+00:00

When non-leader thread does exec, de_thread calls release_task(leader) before
calling exit_itimers(). If local timer interrupt happens in between, it can
oops in send_group_sigqueue() while taking ->sighand->siglock == NULL.

However, we can't change send_group_sigqueue() to check p->signal != NULL,
because sys_timer_create() does get_task_struct() only in SIGEV_THREAD_ID
case. So it is possible that this task_struct was already freed and we can't
trust p->signal.

This patch changes de_thread() so that leader released after exit_itimers()
call.

Signed-off-by: Oleg Nesterov 
Acked-by: Chris Wright 
Signed-off-by: Linus Torvalds

[PATCH] VFS: pass file pointer to filesystem from ftruncate()

2005-11-07T15:53:42+00:00

This patch extends the iattr structure with a file pointer memeber, and adds
an ATTR_FILE validity flag for this member.

This is set if do_truncate() is invoked from ftruncate() or from
do_coredump().

The change is source and binary compatible.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Process Events Connector

2005-11-07T15:53:35+00:00

This patch adds a connector that reports fork, exec, id change, and exit
events for all processes to userspace.  It replaces the fork_advisor patch
that ELSA is currently using.  Applications that may find these events
useful include accounting/auditing (e.g.  ELSA), system activity monitoring
(e.g.  top), security, and resource management (e.g.  CKRM).

Signed-off-by: Matt Helsley 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fix de_thread() vs do_coredump() deadlock

2005-10-31T01:37:25+00:00

de_thread() sends SIGKILL to all sub-threads and waits them to die in 'D'
state.  It is possible that one of the threads already dequeued coredump
signal.  When de_thread() unlocks ->sighand->lock that thread can enter
do_coredump()->coredump_wait() and cause a deadlock.

Signed-off-by: Oleg Nesterov 
Cc: Roland McGrath 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] coredump_wait() cleanup

2005-10-31T01:37:23+00:00

This patch deletes pointless code from coredump_wait().

1. It does useless mm->core_waiters inc/dec under mm->mmap_sem,
   but any changes to ->core_waiters have no effect until we drop
   ->mmap_sem.

2. It calls yield() for absolutely unknown reason.

Signed-off-by: Oleg Nesterov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fix de_thread vs it_real_fn() deadlock

2005-10-31T01:37:19+00:00

de_thread() calls del_timer_sync(->real_timer) under ->sighand->siglock.
This is deadlockable, it_real_fn sends a signal and needs this lock too.

Also, delete unneeded ->real_timer.data assignment.

Signed-off-by: Oleg Nesterov 
Cc: Roland McGrath 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds