Messages in this thread Patch in this message | | | Date | Fri, 18 Nov 2005 13:19:57 -0800 | From | Andrew Morton <> | Subject | Re: 2.6.15-rc1-mm1 |
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Reuben Farrelly <reuben-lkml@reub.net> wrote: > > I don't think I should be able to make this happen so easily though: > > > [root@tornado ~]# rmmod e100 > [root@tornado ~]# rmmod sky2 > [root@tornado ~]# strace modprobe e100 > Unable to handle kernel NULL pointer dereference at virtual address 00000010 > printing eip: > c0124fc7 > *pde = 00000000 > Oops: 0000 [#1] > PREEMPT SMP > last sysfs file: /class/net/eth0/flags > Modules linked in: nfsd exportfs lockd sunrpc autofs4 lm85 hwmon_vid eeprom ipv6 > binfmt_misc hw_random crc32 piix i2c_i801 > CPU: 0 > EIP: 0060:[<c0124fc7>] Not tainted VLI > EFLAGS: 00010202 (2.6.15-rc1-mm2-preempt) > EIP is at ptrace_check_attach+0x14/0xaf
This might help..
Begin forwarded message:
Date: Fri, 18 Nov 2005 18:07:43 +0000 From: Christoph Hellwig <hch@infradead.org> To: Badari Pulavarty <pbadari@us.ibm.com> Cc: akpm@osdl.org, lkml <linux-kernel@vger.kernel.org> Subject: Re: 2.6.15-rc1-mm1 panic in ptrace_check_attach()
On Fri, Nov 18, 2005 at 09:56:40AM -0800, Badari Pulavarty wrote: > Hi Andrew, > > I am not sure if its already reported. I get panic in > ptrace_check_attach() while trying to run UML on 2.6.15-rc1-mm1. > > Going to try 2.6.15-rc1-mm2 now.
Looks like 2.6.15-rc1-mm1 has total crap in ptrace_get_task_struct (and it looks like my fault because I sent out a wrong patch).
The patch below should fix it:
Index: linux-2.6/kernel/ptrace.c =================================================================== --- linux-2.6.orig/kernel/ptrace.c 2005-11-18 10:25:35.000000000 +0100 +++ linux-2.6/kernel/ptrace.c 2005-11-18 10:25:54.000000000 +0100 @@ -459,7 +459,7 @@ read_unlock(&tasklist_lock); if (!child) return ERR_PTR(-ESRCH); - return 0; + return child; } #ifndef __ARCH_SYS_PTRACE - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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