linux-kernel - 3.4-rc2: Possible memory leak in __register_sysctl

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Message-ID: <4F886BFD.7040007@lwfinger.net>
Date:	Fri, 13 Apr 2012 13:10:05 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	LKML <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: 3.4-rc2: Possible memory leak in __register_sysctl_table()

I am seeing apparent memory leaks in 3.4-rcX. I do not think I saw these in 3.3.

The kmemleak traceback is:

unreferenced object 0xffff8800b7536180 (size 96):
   comm "swapper/0", pid 1, jiffies 4294892617 (age 8756.084s)
   hex dump (first 32 bytes):
     20 c4 1c 82 ff ff ff ff 00 00 00 00 01 00 00 00   ...............
     01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
   backtrace:
     [<ffffffff81383401>] kmemleak_alloc+0x21/0x50
     [<ffffffff81134153>] __kmalloc+0x123/0x2a0
     [<ffffffff811a8ac2>] __register_sysctl_table+0x62/0x4d0
     [<ffffffff811a907d>] register_leaf_sysctl_tables+0x14d/0x220
     [<ffffffff811a90e4>] register_leaf_sysctl_tables+0x1b4/0x220
     [<ffffffff811a92c9>] __register_sysctl_paths+0x159/0x1f0
     [<ffffffff811a9376>] register_sysctl_paths+0x16/0x20
     [<ffffffff816b5c41>] ip_static_sysctl_init+0x17/0x19
     [<ffffffff816b68bc>] inet_init+0xb4/0x2b2
     [<ffffffff810001ca>] do_one_initcall+0x3a/0x170
     [<ffffffff81686c52>] kernel_init+0xf7/0x17b
     [<ffffffff8139f154>] kernel_thread_helper+0x4/0x10
     [<ffffffffffffffff>] 0xffffffffffffffff

Thanks,

Larry
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