From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 24 Mar 2011 03:51:42 +0000 (-0700)
Subject: Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
X-Git-Tag: firefly_0821_release~7613^2~1827
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b81a618dcd3ea99de292dbe624f41ca68f464376;p=firefly-linux-kernel-4.4.55.git

Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  deal with races in /proc/*/{syscall,stack,personality}
  proc: enable writing to /proc/pid/mem
  proc: make check_mem_permission() return an mm_struct on success
  proc: hold cred_guard_mutex in check_mem_permission()
  proc: disable mem_write after exec
  mm: implement access_remote_vm
  mm: factor out main logic of access_process_vm
  mm: use mm_struct to resolve gate vma's in __get_user_pages
  mm: arch: rename in_gate_area_no_task to in_gate_area_no_mm
  mm: arch: make in_gate_area take an mm_struct instead of a task_struct
  mm: arch: make get_gate_vma take an mm_struct instead of a task_struct
  x86: mark associated mm when running a task in 32 bit compatibility mode
  x86: add context tag to mark mm when running a task in 32-bit compatibility mode
  auxv: require the target to be tracable (or yourself)
  close race in /proc/*/environ
  report errors in /proc/*/*map* sanely
  pagemap: close races with suid execve
  make sessionid permissions in /proc/*/task/* match those in /proc/*
  fix leaks in path_lookupat()

Fix up trivial conflicts in fs/proc/base.c
---

b81a618dcd3ea99de292dbe624f41ca68f464376
diff --cc fs/proc/base.c
index daba13653256,7d5bb8b9a4ff..5a670c11aeac
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@@ -337,11 -384,16 +384,16 @@@ static int proc_pid_stack(struct seq_fi
  	trace.max_entries	= MAX_STACK_TRACE_DEPTH;
  	trace.entries		= entries;
  	trace.skip		= 0;
- 	save_stack_trace_tsk(task, &trace);
  
- 	for (i = 0; i < trace.nr_entries; i++) {
- 		seq_printf(m, "[<%pK>] %pS\n",
- 			   (void *)entries[i], (void *)entries[i]);
+ 	err = lock_trace(task);
+ 	if (!err) {
+ 		save_stack_trace_tsk(task, &trace);
+ 
+ 		for (i = 0; i < trace.nr_entries; i++) {
 -			seq_printf(m, "[<%p>] %pS\n",
++			seq_printf(m, "[<%pK>] %pS\n",
+ 				   (void *)entries[i], (void *)entries[i]);
+ 		}
+ 		unlock_trace(task);
  	}
  	kfree(entries);
  
diff --cc mm/memory.c
index 20d5f7499ce2,468f5076754c..51a5c23704af
--- a/mm/memory.c
+++ b/mm/memory.c
@@@ -1591,14 -1589,16 +1591,17 @@@ int __get_user_pages(struct task_struc
  						return i ? i : -EFAULT;
  					BUG();
  				}
- 				if (ret & VM_FAULT_MAJOR)
- 					tsk->maj_flt++;
- 				else
- 					tsk->min_flt++;
+ 
+ 				if (tsk) {
+ 					if (ret & VM_FAULT_MAJOR)
+ 						tsk->maj_flt++;
+ 					else
+ 						tsk->min_flt++;
+ 				}
  
  				if (ret & VM_FAULT_RETRY) {
 -					*nonblocking = 0;
 +					if (nonblocking)
 +						*nonblocking = 0;
  					return i;
  				}