linux-kernel - [PATCH] stating/lustre: fix misuse of current->parent.

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Message-ID: <20140718153919.58e0164d@notabene.brown>
Date:	Fri, 18 Jul 2014 15:39:19 +1000
From:	NeilBrown <neilb@...e.de>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, Peng Tao <tao.peng@....com>,
	Andreas Dilger <andreas.dilger@...el.com>
Subject: [PATCH] stating/lustre: fix misuse of current->parent.



current->parent is used by ptrace to redirect some signal delivery
to the ptracer.  It should only be used by 'ptrace' or 'signal' code.
All other users should  use current->real_parent, which is the real
parent.

Signed-off-by: NeilBrown <neilb@...e.de>

diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index 77ee9e58cf87..5c5d2d6470f1 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -909,7 +909,7 @@ void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 		 sbi->ll_stats_track_id == current->pid)
 		lprocfs_counter_add(sbi->ll_stats, op, count);
 	else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
-		 sbi->ll_stats_track_id == current->parent->pid)
+		 sbi->ll_stats_track_id == current->real_parent->pid)
 		lprocfs_counter_add(sbi->ll_stats, op, count);
 	else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 		 sbi->ll_stats_track_id ==

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