[Pkg-uml-pkgs] Bug#366915: user-mode-linux: fails when host kernel is linux-image-2.6.16-1-k7

[Paul Dwerryhouse]

Package: user-mode-linux
Version: 2.6.16-1um-2
Severity: normal


When user-mode linux is used with a host kernel of
linux-image-2.6.16-1-k7 (ie, the package in sid), it panics. When the
host kernel is linux-image-2.6.15-1-k7 (also from sid), it works
perfectly.

I've tested this with a number of guest images; debian sid, ubuntu
breezy & dapper. Doesn't appear to be an NPTL issue; it crashes under
2.6.16 whether the /lib/tls libraries are present or not.


The boot messages when it fails:

$ linux ubd0=uml1.img con=pty con0=fd:0,fd:1 mem=256M eth0=daemon,,unix,/var/run/vde/tap1.ctl eth1=daemon,,unix,/var/run/vde/tap1.ctl
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 PROT_EXEC mmap in /tmp...OK
Checking for the skas3 patch in the host:
  - /proc/mm...not found
  - PTRACE_FAULTINFO...not found
  - PTRACE_LDT...not found
UML running in SKAS0 mode
Linux version 2.6.16 (root at inferi) (gcc version 4.0.4 20060422 (prerelease) (Debian 4.0.3-2)) #2 Sat Apr 29 23:36:42 CEST 2006
Built 1 zonelists
Kernel command line: ubd0=uml1.img con=pty con0=fd:0,fd:1 mem=256M eth0=daemon,,unix,/var/run/vde/tap1.ctl eth1=daemon,,unix,/var/run/vde/tap1.ctl root=98:0
PID hash table entries: 2048 (order: 11, 32768 bytes)

[...]

kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
mapping mmap stub failed, errno = 12
Kernel panic - not syncing: start_userspace : expected SIGSTOP, got status = 256
 
EIP: 0073:[<ffffe410>] CPU: 0 Not tainted ESP: 007b:a7e29fa8 EFLAGS: 00200246 Not tainted
EAX: 00000000 EBX: 000013f5 ECX: 00000013 EDX: 000013f5
ESI: 000013f1 EDI: 00000011 EBP: a7e29fc4 DS: 007b ES: 007b
08267af8:  [<0806f080>] show_regs+0xb4/0xb9
08267b24:  [<0805e08c>] panic_exit+0x23/0x3d
08267b38:  [<0807e495>] notifier_call_chain+0x1a/0x31
08267b58:  [<08072ffb>] panic+0x4f/0xca
08267b74:  [<0806c165>] start_userspace+0xce/0x11a
08267b94:  [<0805e31a>] init_new_context_skas+0xfb/0x13e
08267bb4:  [<080ad3f0>] do_execve+0x96/0x1df
08267bd8:  [<080599b8>] execve1+0x28/0x52
08267bfc:  [<080599f5>] um_execve+0x13/0x3f
08267c18:  [<0805936a>] run_init_process+0x34/0x4f
08267c38:  [<08059471>] init+0xec/0x117
08267c48:  [<0806955b>] run_kernel_thread+0x42/0x4a
08267cf8:  [<0805e49f>] new_thread_handler+0x7f/0xa9
08267d1c:  [<ffffe420>] _etext+0xf7e66406/0x0

Thanks,

Paul.




-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.16-1-k7
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages user-mode-linux depends on:
ii  uml-utilities                 20060323-3 User-mode Linux (utility programs)

user-mode-linux recommends no packages.

-- no debconf information