linux-kernel - Re: 2.6.21-rc6-mm1 ima "BUG: held lock freed!"

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Message-ID: <461B8A0F.2060007@us.ibm.com>
Date:	Tue, 10 Apr 2007 08:58:55 -0400
From:	Reiner Sailer <sailer@...ibm.com>
To:	Joseph Fannin <jhf@...umbus.rr.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, sailer@...son.ibm.com,
	serue@...ux.vnet.ibm.com, zohar@...ux.vnet.ibm.com
Subject: Re: 2.6.21-rc6-mm1 ima "BUG: held lock freed!"


We are looking into this.
Thanks!
Reiner

--forwarded by Reiner Sailer:
On Sun, Apr 08, 2007 at 02:35:59PM -0700, Andrew Morton wrote:
 >
 > 
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-rc6/2.6.21-rc6-mm1/
 >
    I'm seeing this while booting:

ima (ima_init): No TPM chip found(rc = -19), activating TPM-bypass!

=========================
[ BUG: held lock freed! ]
-------------------------
swapper/1 is freeing memory c04c7660-c04c76a3, with a lock still held there!
 (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90
1 lock held by swapper/1:
 #0:  (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90

stack backtrace:
 [<c0105959>] dump_trace+0x1d9/0x210
 [<c01059aa>] show_trace_log_lvl+0x1a/0x30
 [<c0106612>] show_trace+0x12/0x20
 [<c01066d6>] dump_stack+0x16/0x20
 [<c014fd3a>] debug_check_no_locks_freed+0x17a/0x180
 [<c014cdbf>] debug_mutex_init+0x1f/0x50
 [<c0145451>] __mutex_init+0x41/0x50
 [<c020277d>] ima_create_htable+0x7d/0x90
 [<c020286f>] ima_init+0x3f/0x270
 [<c051b765>] init_evm+0x1f5/0x250
 [<c05015d2>] kernel_init+0x132/0x320
 [<c010532f>] kernel_thread_helper+0x7/0x18
 =======================

    I saw this in -rc5-mm4 also.

    I couldn't find a contact address in MAINTAINERS, so I've CC'd the
two authors listed on top of ima_create_htable.c , as well as the
first submitter of the IMA stuff I found in my LKML archive.

    As an aside, this computer does have (some sort of) TPM chip, but
the driver is built as a module, and not loaded at this point (not a
worry for me, I don't intend to use it).

--
Joseph Fannin
jfannin@...il.com || jhf@...umbus.rr.com

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