From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: [BUG] NULL pointer dereference From: Paul Larson Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: 09 Oct 2002 09:01:47 -0500 Message-Id: <1034172108.29084.96.camel@plars> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org Return-Path: To: lkml , linux-mm , lse-tech List-ID: During some testing I was doing on linux-2.5.41-mm1 I came across the NULL pointer dereference below. I suspect it is also in 2.5.41 vanilla, but I have not been able to reproduce it so far. It was on an 8-way PIII-700, 16 GB ram. I had been running ltp at the time and it had completed. I was hitting tab at the time it happened to get a command line completion in bash. Unable to handle kernel NULL pointer dereference at virtual address 0000002c printing eip: c01525b5 *pde = 00104001 Oops: 0000 CPU: 0 EIP: 0060:[] Not tainted EFLAGS: 00010046 EIP is at fasync_helper+0x75/0xf0 eax: c0359198 ebx: 00000000 ecx: 0000002c edx: 0000007e esi: 0000002c edi: 00000000 ebp: cc2682c0 esp: f637bec4 ds: 0068 es: 0068 ss: 0068 Process python (pid: 1253, threadinfo=f637a000 task=f6c8f1a0) Stack: 00000000 f7c0c9bc f7c0c960 ffffffff 00000000 c014dc45 ffffffff cc2682c0 00000000 0000002c f7c0c960 f7ff5620 f7c0c960 f63b8ca0 c014dd83 ffffffff cc2682c0 00000000 cc2682c0 c014453b f7c0c960 cc2682c0 f7ff5760 00000286 Call Trace: [] pipe_read_fasync+0x45/0x70 [] pipe_read_release+0x13/0x30 [] __fput+0x2b/0xd0 [] filp_close+0x99/0xb0 [] put_files_struct+0x4b/0xd0 [] do_exit+0x109/0x2e0 [] do_softirq+0x5b/0xc0 [] smp_apic_timer_interrupt+0x10f/0x120 [] syscall_call+0x7/0xb Code: 8b 16 85 d2 74 36 90 8d 74 26 00 39 6a 0c 75 22 85 ff 75 ba Thanks, Paul Larson -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/