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  1. 13 6月, 2011 5 次提交
    • A
      Delay struct net freeing while there's a sysfs instance refering to it · a685e089
      由 Al Viro 提交于 
      	* new refcount in struct net, controlling actual freeing of the memory
	* new method in kobj_ns_type_operations (->drop_ns())
	* ->current_ns() semantics change - it's supposed to be followed by
corresponding ->drop_ns().  For struct net in case of CONFIG_NET_NS it bumps
the new refcount; net_drop_ns() decrements it and calls net_free() if the
last reference has been dropped.  Method renamed to ->grab_current_ns().
	* old net_free() callers call net_drop_ns() instead.
	* sysfs_exit_ns() is gone, along with a large part of callchain
leading to it; now that the references stored in ->ns[...] stay valid we
do not need to hunt them down and replace them with NULL.  That fixes
problems in sysfs_lookup() and sysfs_readdir(), along with getting rid
of sb->s_instances abuse.

	Note that struct net *shutdown* logics has not changed - net_cleanup()
is called exactly when it used to be called.  The only thing postponed by
having a sysfs instance refering to that struct net is actual freeing of
memory occupied by struct net.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      a685e089
    • A
      afs: fix sget() races, close leak on umount · dde194a6
      由 Al Viro 提交于 
      * set ->s_fs_info in set() callback passed to sget()
* allocate the thing and set it up enough for afs_test_super() before
making it visible
* have it freed in ->kill_sb() (current tree simply leaks it)
* have ->put_super() leave ->s_fs_info->volume alone; it's too early for
dropping it; do that from ->kill_sb() after having called kill_anon_super().
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      dde194a6
    • A
      ubifs: fix sget races · d251ed27
      由 Al Viro 提交于 
      * allocate ubifs_info in ->mount(), fill it enough for sb_test() and
set ->s_fs_info to it in set() callback passed to sget().
* do *not* free it in ->put_super(); do that in ->kill_sb() after we'd
done kill_anon_super().
* don't free it in ubifs_fill_super() either - deactivate_locked_super()
done by caller when ubifs_fill_super() returns an error will take care
of that sucker.
* get rid of kludge with passing ubi to ubifs_fill_super() in ->s_fs_info;
we only need it in alloc_ubifs_info(), so ubifs_fill_super() will need
only ubifs_info.  Which it will find in ->s_fs_info just fine, no need to
reassign anything...

As the result, sb_test() becomes safe to apply to all superblocks that
can be found by sget() (and a kludge with temporary use of ->s_fs_info
to store a pointer to very different structure goes away).
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      d251ed27
    • A
      ubifs: split allocation of ubifs_info into a separate function · b1c27ab3
      由 Al Viro 提交于 
      preparation to ubifs sget() race fixes
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      b1c27ab3
    • A
      fix leak in proc_set_super() · ff78fca2
      由 Al Viro 提交于 
      set_anon_super() can fail...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      ff78fca2
  3. 10 6月, 2011 1 次提交
    • M
      exec: delay address limit change until point of no return · dac853ae
      由 Mathias Krause 提交于 
      Unconditionally changing the address limit to USER_DS and not restoring
it to its old value in the error path is wrong because it prevents us
using kernel memory on repeated calls to this function.  This, in fact,
breaks the fallback of hard coded paths to the init program from being
ever successful if the first candidate fails to load.

With this patch applied switching to USER_DS is delayed until the point
of no return is reached which makes it possible to have a multi-arch
rootfs with one arch specific init binary for each of the (hard coded)
probed paths.

Since the address limit is already set to USER_DS when start_thread()
will be invoked, this redundancy can be safely removed.
Signed-off-by: NMathias Krause <minipli@googlemail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      dac853ae
  5. 09 6月, 2011 1 次提交
  7. 07 6月, 2011 4 次提交
  9. 06 6月, 2011 1 次提交
  11. 04 6月, 2011 13 次提交
  13. 03 6月, 2011 7 次提交
  15. 01 6月, 2011 5 次提交
  17. 31 5月, 2011 1 次提交
  19. 30 5月, 2011 2 次提交