From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261872AbUBHC3s (ORCPT ); Sat, 7 Feb 2004 21:29:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261877AbUBHC3s (ORCPT ); Sat, 7 Feb 2004 21:29:48 -0500 Received: from mailgw.cvut.cz ([147.32.3.235]:39078 "EHLO mailgw.cvut.cz") by vger.kernel.org with ESMTP id S261872AbUBHC3p (ORCPT ); Sat, 7 Feb 2004 21:29:45 -0500 Date: Sun, 8 Feb 2004 03:29:21 +0100 From: Petr Vandrovec To: linux-kernel@vger.kernel.org Subject: Oopses on usbnet unload in 2.6.3-rc1 Message-ID: <20040208022921.GA1337@buk.vc.cvut.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, recent thread about buggy sysfs fbdev support reminded me that situation with modules unloading is not quite correct... Besides floppy & nbd unload crashes (I already reported floppy/sysfs problem during Christmas), there is a doublefree in usbnet's unload. I have no idea what's correct fix, but given fbdev's problems probably just removing kfree(dev->net). For now I build my kernel without any modules, papering over all simillar bugs... Feb 8 02:00:45 ppc kernel: Linux version 2.6.3-rc1-c1560 (root@ppc) (gcc version 3.3.3 20040125 (prerelease) (Debian)) #2 Sun Feb 8 01:03:09 CET 2004 Feb 8 02:00:46 ppc kernel: usb0: register usbnet at usb-0000:00:04.2-2, Prolific PL-2301/PL-2302 Feb 8 02:00:46 ppc kernel: drivers/usb/core/usb.c: registered new driver usbnet Feb 8 02:09:04 ppc kernel: drivers/usb/core/usb.c: deregistering driver usbnet Feb 8 02:09:04 ppc kernel: usb0: unregister usbnet usb-0000:00:04.2-2, Prolific PL-2301/PL-2302 Feb 8 02:09:05 ppc kernel: slab error in cache_free_debugcheck(): cache `size-1024': double free, or memory outside object was overwritten Feb 8 02:09:05 ppc kernel: Call Trace: Feb 8 02:09:05 ppc kernel: [] kfree+0x2db/0x3f0 Feb 8 02:09:05 ppc kernel: [] usbnet_disconnect+0x93/0xd0 [usbnet] Feb 8 02:09:05 ppc kernel: [] usbnet_disconnect+0x93/0xd0 [usbnet] Feb 8 02:09:05 ppc kernel: [] usb_unbind_interface+0x7b/0x80 Feb 8 02:09:05 ppc kernel: [] device_release_driver+0x64/0x70 Feb 8 02:09:05 ppc kernel: [] driver_detach+0x20/0x30 Feb 8 02:09:05 ppc kernel: [] bus_remove_driver+0x61/0xa0 Feb 8 02:09:05 ppc kernel: [] driver_unregister+0x1a/0x46 Feb 8 02:09:05 ppc kernel: [] usb_deregister+0x31/0x40 Feb 8 02:09:05 ppc kernel: [] usbnet_exit+0xf/0x13 [usbnet] Feb 8 02:09:05 ppc kernel: [] sys_delete_module+0x14d/0x1d0 Feb 8 02:09:05 ppc kernel: [] syscall_call+0x7/0xb Feb 8 02:09:05 ppc kernel: Feb 8 02:09:05 ppc kernel: de162008: redzone 1: 0x0, redzone 2: 0x0. Feb 8 02:09:05 ppc kernel: ------------[ cut here ]------------ Feb 8 02:09:05 ppc kernel: kernel BUG at mm/slab.c:1696! Feb 8 02:09:05 ppc kernel: invalid operand: 0000 [#1] Feb 8 02:09:05 ppc kernel: CPU: 0 Feb 8 02:09:05 ppc kernel: EIP: 0060:[] Not tainted Feb 8 02:09:05 ppc kernel: EFLAGS: 00010002 Feb 8 02:09:05 ppc kernel: EIP is at kfree+0x27b/0x3f0 Feb 8 02:09:05 ppc kernel: eax: de162000 ebx: 80010c00 ecx: 00001000 edx: 00000008 Feb 8 02:09:05 ppc kernel: esi: c151a800 edi: de162000 ebp: de162008 esp: dd209e84 Feb 8 02:09:05 ppc kernel: ds: 007b es: 007b ss: 0068 Feb 8 02:09:05 ppc kernel: Process rmmod (pid: 1659, threadinfo=dd208000 task=d8f22960) Feb 8 02:09:05 ppc kernel: Stack: c151a800 de162008 00000000 00000000 1e162008 e198cf23 c151e3c0 00000286 Feb 8 02:09:05 ppc kernel: ddf40df8 df4d6ef8 df52ebf8 00000000 e198cf23 de162c00 de162c00 c1743ca8 Feb 8 02:09:05 ppc kernel: df52ebfc e198d85d df4d6ef8 e198e780 e198e7a0 c02d101b df4d6ef8 df4d6ef8 Feb 8 02:09:05 ppc kernel: Call Trace: Feb 8 02:09:05 ppc kernel: [] usbnet_disconnect+0x93/0xd0 [usbnet] Feb 8 02:09:05 ppc kernel: [] usbnet_disconnect+0x93/0xd0 [usbnet] Feb 8 02:09:05 ppc kernel: [] usb_unbind_interface+0x7b/0x80 Feb 8 02:09:05 ppc kernel: [] device_release_driver+0x64/0x70 Feb 8 02:09:05 ppc kernel: [] driver_detach+0x20/0x30 Feb 8 02:09:05 ppc kernel: [] bus_remove_driver+0x61/0xa0 Feb 8 02:09:05 ppc kernel: [] driver_unregister+0x1a/0x46 Feb 8 02:09:05 ppc kernel: [] usb_deregister+0x31/0x40 Feb 8 02:09:05 ppc kernel: [] usbnet_exit+0xf/0x13 [usbnet] Feb 8 02:09:05 ppc kernel: [] sys_delete_module+0x14d/0x1d0 Feb 8 02:09:05 ppc kernel: [] syscall_call+0x7/0xb Feb 8 02:09:05 ppc kernel: Feb 8 02:09:05 ppc kernel: Code: 0f 0b a0 06 da ef 39 c0 e9 e7 fe ff ff 0f 0b 9f 06 da ef 39 Petr Vandrovec