Revision a98fdcef941e107eeabae622d85a1f476f25a160 authored by Oleg Nesterov on 14 January 2008, 21:02:37 UTC, committed by Linus Torvalds on 14 January 2008, 21:23:00 UTC
Commit 84427eaef1fb91704c7112bdb598c810003b99f3 (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>
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syscall-stubs.S
/*
* Copyright (C) 2005-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Stubs for syscalls that require access to pt_regs or that take more
* than five parameters.
*/
#define ARG6 r3
.text
.global __sys_rt_sigsuspend
.type __sys_rt_sigsuspend,@function
__sys_rt_sigsuspend:
mov r10, sp
rjmp sys_rt_sigsuspend
.global __sys_sigaltstack
.type __sys_sigaltstack,@function
__sys_sigaltstack:
mov r10, sp
rjmp sys_sigaltstack
.global __sys_rt_sigreturn
.type __sys_rt_sigreturn,@function
__sys_rt_sigreturn:
mov r12, sp
rjmp sys_rt_sigreturn
.global __sys_fork
.type __sys_fork,@function
__sys_fork:
mov r12, sp
rjmp sys_fork
.global __sys_clone
.type __sys_clone,@function
__sys_clone:
mov r8, sp
rjmp sys_clone
.global __sys_vfork
.type __sys_vfork,@function
__sys_vfork:
mov r12, sp
rjmp sys_vfork
.global __sys_execve
.type __sys_execve,@function
__sys_execve:
mov r9, sp
rjmp sys_execve
.global __sys_mmap2
.type __sys_mmap2,@function
__sys_mmap2:
pushm lr
st.w --sp, ARG6
rcall sys_mmap2
sub sp, -4
popm pc
.global __sys_sendto
.type __sys_sendto,@function
__sys_sendto:
pushm lr
st.w --sp, ARG6
rcall sys_sendto
sub sp, -4
popm pc
.global __sys_recvfrom
.type __sys_recvfrom,@function
__sys_recvfrom:
pushm lr
st.w --sp, ARG6
rcall sys_recvfrom
sub sp, -4
popm pc
.global __sys_pselect6
.type __sys_pselect6,@function
__sys_pselect6:
pushm lr
st.w --sp, ARG6
rcall sys_pselect6
sub sp, -4
popm pc
.global __sys_splice
.type __sys_splice,@function
__sys_splice:
pushm lr
st.w --sp, ARG6
rcall sys_splice
sub sp, -4
popm pc
.global __sys_epoll_pwait
.type __sys_epoll_pwait,@function
__sys_epoll_pwait:
pushm lr
st.w --sp, ARG6
rcall sys_epoll_pwait
sub sp, -4
popm pc
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