Re: NULL pointer in kmem_cache_alloc with 2.6.25-rc1

From: Andrew Morton
Date: Mon Feb 18 2008 - 08:01:35 EST


On Fri, 15 Feb 2008 14:47:01 +0800 "Zhang, Yanmin" <yanmin_zhang@xxxxxxxxxxxxxxx> 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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