From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: containers - bug Date: Fri, 31 Aug 2007 18:29:12 +0200 Message-ID: <46D841D8.6000100@fr.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Paul Menage Cc: Linux Containers List-Id: containers.vger.kernel.org Hi Paul, I was playing with the container filesystem (very nice) and I fall inside a kbug. I did the following: mkdir /dev/container mount -t container -o cpuset cpuset /dev/container cd /dev/container/ mkdir Charlie cd Charlie echo $$ > tasks bash cd .. rmdir Charlie exit ls => bang ! I run a 2.6.23-rc3-mm1 kernel with qemu. Here is the message: -------------------- BUG: unable to handle kernel paging request at virtual address 6b6b6c23 printing eip: c016719d *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: Pid: 960, comm: bash Not tainted (2.6.23-rc3-mm1 #522) EIP: 0060:[] EFLAGS: 00000246 CPU: 0 EIP is at __link_path_walk+0x41/0xb54 EAX: c1873320 EBX: c141c608 ECX: c167be38 EDX: c15de000 ESI: c167bef4 EDI: 6b6b6b6b EBP: c167be3c ESP: c167bde8 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process bash (pid: 960, ti=c167a000 task=c1466b50 task.ti=c167a000) Stack: c15de000 00000000 00000400 00000001 000000bf 00008a31 7f1c0300 01000415 1a131100 170f1200 00000000 00009600 00009600 00000500 00000003 c03ab570 00000082 c167be38 c141c608 c167bef4 c1873320 c167bea8 c0167cfb c15de000 Call Trace: [] show_trace_log_lvl+0x1a/0x2f [] show_stack_log_lvl+0x9d/0xa5 [] show_registers+0xa7/0x178 [] die+0x107/0x227 [] do_page_fault+0x47f/0x567 [] error_code+0x72/0x78 [] link_path_walk+0x4b/0xc0 [] path_walk+0x19/0x1b [] do_path_lookup+0x179/0x193 [] __user_walk_fd+0x32/0x49 [] vfs_stat_fd+0x1b/0x41 [] vfs_stat+0x11/0x13 [] sys_stat64+0x14/0x28 [] syscall_call+0x7/0xb ======================= Code: ff 45 ac 8b 55 ac 8a 02 3c 2f 74 f4 84 c0 0f 84 99 0a 00 00 8b 06 83 7e 1c 00 8b 78 18 74 08 83 65 b8 04 83 4d b8 01 83 4e 14 04 <8b> 87 b8 00 00 00 0f b7 5f 6e 85 c0 74 0a 83 78 34 00 0f 85 b7 EIP: [] __link_path_walk+0x41/0xb54 SS:ESP 0068:c167bde8