linux-kernel - Re: NULL pointer in kmem_cache

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Message-Id: <20080218045918.2b80ee08.akpm@linux-foundation.org>
Date:	Mon, 18 Feb 2008 04:59:18 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Christoph Lameter <clameter@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: NULL pointer in kmem_cache_alloc with 2.6.25-rc1

On Fri, 15 Feb 2008 14:47:01 +0800 "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> wrote:

> Call Trace:
>  [<ffffffff805e0024>] ? __alloc_skb+0x31/0x121
>  [<ffffffff805dc389>] ? sock_alloc_send_skb+0x77/0x1d2
>  [<ffffffff80243897>] ? autoremove_wake_function+0x0/0x2e
>  [<ffffffff805e12d5>] ? memcpy_fromiovec+0x36/0x66
>  [<ffffffff80636ec0>] ? unix_stream_sendmsg+0x165/0x333
>  [<ffffffff805d9863>] ? sock_aio_write+0xd1/0xe0
>  [<ffffffff80227834>] ? __wake_up_common+0x41/0x74
>  [<ffffffff8027d267>] ? do_sync_write+0xc9/0x10c
>  [<ffffffff80265fbb>] ? __do_fault+0x382/0x3cd
>  [<ffffffff80243897>] ? autoremove_wake_function+0x0/0x2e
>  [<ffffffff80268840>] ? handle_mm_fault+0x38a/0x70d
>  [<ffffffff806afd39>] ? error_exit+0x0/0x51
>  [<ffffffff80228008>] ? __dequeue_entity+0x1c/0x32
>  [<ffffffff8027d9bb>] ? vfs_write+0xc0/0x136
>  [<ffffffff8027dee5>] ? sys_write+0x45/0x6e
>  [<ffffffff8020bdcb>] ? system_call_after_swapgs+0x7b/0x80

off-topic, but...  Why are all the backtrace decodes here marked as
being unreliable?
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