Public bug reported: Binary package hint: user-mode-linux
2.6.22-2um-0ubuntu2 package contains a bug that prevents the use of cow files see: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=442108 http://mirror.celinuxforum.org/gitstat/commit-detail.php?commit=8619b86f20588c020b280e6f67a9b8712b1ee38a http://www.mail-archive.com/user-mode-linux-u...@lists.sourceforge.net/msg05620.html In detail: The problem arise when trying to start one uml instance using a cow filesystem support. j...@realbox:~/uml/uml-2$ linux.uml ubda=root_fs_cow,root_fs ubdb=swap_fs eth0=tuntap,,,192.168.122.254 mem=256M Core dump limits : soft - 0 hard - NONE Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...OK Checking advanced syscall emulation patch for ptrace...OK Checking for tmpfs mount on /dev/shm...OK Checking PROT_EXEC mmap in /dev/shm/...OK Checking for the skas3 patch in the host: - /proc/mm...not found: No such file or directory - PTRACE_FAULTINFO...not found - PTRACE_LDT...not found UML running in SKAS0 mode Adding 3510272 bytes to physical memory to account for exec-shield gap [42949372.960000] Linux version 2.6.22-rc5 (r...@vernadsky) (gcc version 4.1.3 20070629 (prerelease) (Ubuntu 4.1.2-13ubuntu2)) #2 Mon Jul 2 10:14:22 GMT 2007 [42949372.960000] Built 1 zonelists. Total pages: 65875 [42949372.960000] Kernel command line: ubda=root_fs_cow,root_fs ubdb=swap_fs eth0=tuntap,,,192.168.122.254 mem=256M root=98:0 [42949372.960000] PID hash table entries: 2048 (order: 11, 8192 bytes) [42949372.960000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [42949372.960000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [42949372.960000] Memory: 254464k available [42949373.310000] Mount-cache hash table entries: 512 [42949373.310000] Checking for host processor cmov support...Yes [42949373.310000] Checking for host processor xmm support...No [42949373.310000] Checking that host ptys support output SIGIO...Yes [42949373.310000] Checking that host ptys support SIGIO on close...No, enabling workaround [42949373.310000] Using 2.6 host AIO [42949373.310000] NET: Registered protocol family 16 [42949373.310000] NET: Registered protocol family 2 [42949373.440000] IP route cache hash table entries: 4096 (order: 2, 16384 bytes) [42949373.440000] TCP established hash table entries: 16384 (order: 5, 131072 bytes) [42949373.440000] TCP bind hash table entries: 16384 (order: 4, 65536 bytes) [42949373.440000] TCP: Hash tables configured (established 16384 bind 16384) [42949373.440000] TCP reno registered [42949373.470000] Checking host MADV_REMOVE support...OK [42949373.470000] mconsole (version 2) initialized on /home/jon/.uml/LuZ1y6/mconsole [42949373.470000] Mapper v0.1 [42949373.470000] mmapper_init - find_iomem failed [42949373.470000] UML Watchdog Timer [42949373.470000] Host TLS support detected [42949373.470000] Detected host type: i386 [42949373.470000] VFS: Disk quotas dquot_6.5.1 [42949373.470000] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [42949373.470000] JFS: nTxBlock = 1990, nTxLock = 15925 [42949373.470000] SGI XFS with ACLs, security attributes, realtime, large block numbers, no debug enabled [42949373.470000] SGI XFS Quota Management subsystem [42949373.470000] io scheduler noop registered [42949373.470000] io scheduler anticipatory registered (default) [42949373.470000] io scheduler deadline registered [42949373.470000] io scheduler cfq registered [42949373.640000] SoftDog: cannot register miscdev on minor=130 (err=-16) [42949373.640000] TCP cubic registered [42949373.640000] NET: Registered protocol family 1 [42949373.640000] NET: Registered protocol family 17 [42949373.650000] Initialized stdio console driver [42949373.650000] Console initialized on /dev/tty0 [42949373.650000] Initializing software serial port version 1 [42949373.680000] ubda: unknown partition table [42949373.720000] ubdb: unknown partition table [42949373.720000] Choosing a random ethernet address for device eth0 [42949373.720000] Netdevice 0 (4a:c7:fa:e2:1b:c5) : TUN/TAP backend - IP = 192.168.122.254 [42949373.720000] ReiserFS: ubda: found reiserfs format "3.6" with standard journal [42949373.720000] ReiserFS: ubda: using ordered data mode [42949373.720000] ReiserFS: ubda: journal params: device ubda, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [42949373.720000] ReiserFS: ubda: checking transaction log (ubda) [42949373.720000] ReiserFS: ubda: Using r5 hash to sort names [42949373.720000] VFS: Mounted root (reiserfs filesystem) readonly. [42949373.720000] Kernel panic - not syncing: Operation too long [42949373.720000] [42949373.720000] EIP: 0073:[<b8030430>] CPU: 0 Not tainted ESP: 007b:b7eaffb4 EFLAGS: 00000246 [42949373.720000] Not tainted [42949373.720000] EAX: 00000000 EBX: 00005c74 ECX: 00000013 EDX: 00005c74 [42949373.720000] ESI: 00005c70 EDI: 00000011 EBP: b7eaffd8 DS: 007b ES: 007b [42949373.720000] 08bcfa4c: [<0806ce8c>] show_regs+0xb4/0xb9 [42949373.720000] 08bcfa78: [<0805b038>] panic_exit+0x25/0x3f [42949373.720000] 08bcfa8c: [<0807c418>] notifier_call_chain+0x21/0x46 [42949373.720000] 08bcfaac: [<0807c4b3>] __atomic_notifier_call_chain+0x17/0x19 [42949373.720000] 08bcfac8: [<0807c4ca>] atomic_notifier_call_chain+0x15/0x17 [42949373.720000] 08bcfae4: [<08071532>] panic+0x52/0xd8 [42949373.720000] 08bcfb04: [<08062e2b>] cowify_req+0x38/0xe3 [42949373.720000] 08bcfb24: [<08062f85>] prepare_request+0xaf/0xba [42949373.720000] 08bcfb50: [<0806303d>] do_ubd_request+0xad/0x140 [42949373.720000] 08bcfb84: [<081c259f>] __generic_unplug_device+0x20/0x26 [42949373.720000] 08bcfb94: [<081c25b5>] generic_unplug_device+0x10/0x18 [42949373.720000] 08bcfba0: [<081c261d>] blk_backing_dev_unplug+0x60/0x69 [42949373.720000] 08bcfbc4: [<080c7482>] block_sync_page+0x32/0x36 [42949373.720000] 08bcfbd4: [<0809102a>] sync_page+0x31/0x3b [42949373.720000] 08bcfbe0: [<0823dafd>] __wait_on_bit_lock+0x2f/0x5a [42949373.720000] 08bcfbfc: [<080915c3>] __lock_page+0x54/0x5d [42949373.720000] 08bcfc34: [<08092331>] filemap_nopage+0x1c7/0x259 [42949373.720000] 08bcfc60: [<0809bb4a>] do_no_page+0x6f/0x272 [42949373.720000] 08bcfc98: [<0809bef5>] __handle_mm_fault+0xa7/0x180 [42949373.720000] 08bcfcc8: [<0805aa0a>] handle_page_fault+0xe2/0x1c2 [42949373.720000] 08bcfcfc: [<0805bb85>] maybe_map+0x51/0x83 [42949373.720000] 08bcfd30: [<0805bbc9>] do_op_one_page+0x12/0x6d [42949373.720000] 08bcfd48: [<0805bcae>] do_buffer_op+0x8a/0x11f [42949373.720000] 08bcfd88: [<08068b65>] setjmp_wrapper+0x3c/0x45 [42949373.720000] 08bcfdbc: [<0805bd6a>] buffer_op+0x27/0x52 [42949373.720000] 08bcfdf0: [<0805c072>] clear_user_skas+0x67/0x75 [42949373.720000] 08bcfe18: [<080cf599>] padzero+0x1e/0x2f [42949373.720000] 08bcfe28: [<080cfcbd>] load_elf_interp+0x1c2/0x255 [42949373.720000] 08bcfe5c: [<080d06f2>] load_elf_binary+0x7fd/0xb57 [42949373.720000] 08bcfee0: [<080ae741>] search_binary_handler+0x60/0x170 [42949373.720000] 08bcff04: [<080ae998>] do_execve+0x147/0x1cb [42949373.720000] 08bcff24: [<08057ced>] execve1+0x2a/0x54 [42949373.720000] 08bcff48: [<08057d2c>] um_execve+0x15/0x41 [42949373.720000] 08bcff64: [<08059e25>] kernel_execve+0x2c/0x37 [42949373.720000] 08bcff84: [<080576cf>] run_init_process+0x1b/0x20 [42949373.720000] 08bcff98: [<08057764>] init_post+0x90/0xb8 [42949373.720000] 08bcffa4: [<08049879>] kernel_init+0x7e/0x85 [42949373.720000] 08bcffb4: [<08067315>] run_kernel_thread+0x37/0x42 [42949373.720000] 08bcffe0: [<0805b49d>] new_thread_handler+0x57/0x7e [42949373.720000] 08bcfffc: [<a55a5a5a>] 0xa55a5a5a [42949373.720000] Fallo de segmentación Notice that the virtual machine started using root_fs (without cow functionality) starts OK My system is j...@realbox:~$ lsb_release -rd Description: Ubuntu 8.10 Release: 8.10 j...@realbox:~$ Packet version: j...@realbox:~$...@realbox:~$ dpkg -l | egrep "uml|user-mode-linux" ii uml-utilities 20070815-1.1 User-mode Linux (utility programs) ii user-mode-linux 2.6.22-2um-0ubuntu2 User-mode Linux (kernel) j...@realbox:~$ Best regards, ** Affects: user-mode-linux (Ubuntu) Importance: Undecided Status: New -- limit request size on COWed devices https://bugs.launchpad.net/bugs/338795 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
