[uml-devel] Kernel panic: check_ptrace : child exited with status 0x100

["Christopher S. Aker" <caker@theshore.net>]

Ok, so a new combination.  This is 2.4.27 + 2.4.26-um + all the incremental + Bodo's
sysemu-panic patch.  It works fine on non-sysemu hosts, and on a host with the
original version of sysemu.

I think the key here is that this host has the latest (v5) SKAS patch, whereas the
2.6.7 host kernel used the standard sysemu patch.

----
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Checking PROT_EXEC mmap in /tmp...OK
Checking for /dev/anon on the host...Not available (open failed with errno 6)
Linux version 2.4.27-linode35-3um (caker@host4.linode.com) (gcc version 3.2.2
20030222 (Red Hat Linux 3.2.2-5)) #1 Wed Oct 6 11:31:28 EDT 2004
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: mem=64M fake_ide fakehd con=null con0=fd:0,fd:1 devfs=nomount
root=/dev/ubda ubda=/linodes/luctourangeau/13588.fs
ubdb=/linodes/luctourangeau/13586.fs eth0=tuntap,luctourangeau_0,fe:fd:46:55:10:64
token_max=400000 token_refill=512
fakehd : Changing ubd_gendisk.major_name to "hd".
Calibrating delay loop... 3787.98 BogoMIPS
Memory: 59436k available
Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...<0>Kernel panic: check_ptrace : child
exited with status 0x100
In idle task - not syncing
 <6>SysRq : Show Regs

EIP: 0000:[<00000000>] CPU: 0 Not tainted EFLAGS: 00000000
    Not tainted
EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 0000 ES: 0000
Call Trace: [<80315778>] [<80317cb6>] [<800115f3>] [<801adc3a>] [<801992f5>]
   [<8001e3fa>] [<80013cb4>] [<80193f0d>] [<8033efe0>] [<800075c5>] [<803178fa>]
   [<8019d8a0>] [<80007b65>] [<800024b2>] [<8019d8a0>] [<80002459>] [<8019d8c5>]
   [<8019d8a0>] [<80193fad>] [<8019d8a0>] [<80193f88>] [<8019d8a0>] [<8019d609>]
   [<8019d8a0>] [<8019d07d>] [<802b0108>] [<802b0371>]

-Chris



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