linux/fs/proc
Oleg Nesterov a98fdcef94 fix the "remove task_ppid_nr_ns" commit
Commit 84427eaef1 (remove task_ppid_nr_ns)
moved the task_tgid_nr_ns(task->real_parent) outside of lock_task_sighand().
This is wrong, ->real_parent could be freed/reused.

Both ->parent/real_parent point to nothing after __exit_signal() because
we remove the child from ->children list, and thus the child can't be
reparented when its parent exits.

rcu_read_lock() protects ->parent/real_parent, but _only_ if we know it was
valid before we take rcu lock.

Revert this part of the patch.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-14 13:23:00 -08:00
..
array.c fix the "remove task_ppid_nr_ns" commit 2008-01-14 13:23:00 -08:00
base.c restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid 2008-01-02 13:13:27 -08:00
generic.c proc: remove/Fix proc generic d_revalidate 2007-12-10 19:43:55 -08:00
inode-alloc.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
inode.c proc: fix proc_dir_entry refcounting 2007-12-05 09:21:20 -08:00
internal.h restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid 2008-01-02 13:13:27 -08:00
kcore.c [PATCH] elf: fix kcore note size calculation 2006-12-07 08:39:38 -08:00
kmsg.c [PATCH] Make most file operations structs in fs/ const 2006-03-28 09:16:06 -08:00
Makefile [NET]: Make /proc/net per network namespace 2007-10-10 16:49:06 -07:00
mmu.c fs/proc/mmu.c: headers butchery 2007-10-17 08:42:48 -07:00
nommu.c [PATCH] mark struct file_operations const 6 2007-02-12 09:48:45 -08:00
proc_devtree.c [POWERPC] Make struct property's value a void * 2007-04-13 03:55:18 +10:00
proc_misc.c Unify /proc/slabinfo configuration 2008-01-02 13:04:48 -08:00
proc_net.c [NETNS]: Fix /proc/net breakage 2007-12-02 00:33:17 +11:00
proc_sysctl.c Fix pointer mismatches in proc_sysctl.c 2007-10-25 15:16:49 -07:00
proc_tty.c Make /proc/tty/drivers use seq_list_xxx helpers 2007-07-16 09:05:42 -07:00
root.c proc: fix proc_dir_entry refcounting 2007-12-05 09:21:20 -08:00
task_mmu.c restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid 2008-01-02 13:13:27 -08:00
task_nommu.c restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace pid 2008-01-02 13:13:27 -08:00
vmcore.c [PATCH] i386: Allow i386 crash kernels to handle x86_64 dumps 2007-05-02 19:27:09 +02:00