On Tue, May 16, 2006 at 03:12:44PM -0400, Jeff Dike wrote:
> On Mon, May 15, 2006 at 12:29:58PM -0300, Alberto Bertogli wrote:
> > Sure, here it is:
> > (gdb) disas stub_segv_handler
>
> Sorry, I misread the error message and asked for the wrong thing.
> Your UML is seeing a process segfault during a system call, before the
> SIGTRAP expected at the end of the system call. I don't know what's
> happening there.
>
> Can you apply the following patch, which will just give you a register
> dump of the process, and send me the output?
Here it is. While the patch worked, it was for 2.6.16, and I'm using
2.6.17-rc4, I hope that's not a problem.
[42949373.940000] EXT3-fs: mounted filesystem with ordered data mode.
[42949373.940000] VFS: Mounted root (ext3 filesystem) readonly.
[42949374.050000] Stub registers -
[42949374.050000] 0 - 8
[42949374.050000] 1 - 400040
[42949374.050000] 2 - 40001530
[42949374.050000] 3 - 2
[42949374.050000] 4 - fffffffd
[42949374.050000] 5 - 7
[42949374.050000] 6 - 5
[42949374.050000] 7 - 37
[42949374.050000] 8 - 3
[42949374.050000] 9 - 20611
[42949374.050000] 10 - 0
[42949374.050000] 11 - 2d
[42949374.050000] 12 - 11
[42949374.050000] 13 - 7f7f8d4539
[42949374.050000] 14 - 0
[42949374.050000] 15 - ffffffffffffffff
[42949374.050000] 16 - 4000eae0
[42949374.050000] 17 - 33
[42949374.050000] 18 - 10246
[42949374.050000] 19 - 7f7f8d4498
[42949374.050000] 20 - 2b
[42949374.050000] Kernel panic - not syncing: Kernel mode fault at addr 0x0, ip 0x4000f349
[42949374.050000]
[42949374.050000] Modules linked in:
[42949374.050000] Pid: 1, comm: init Not tainted 2.6.17-rc4
[42949374.050000] RIP: 0033:[<000000004000f349>]
[42949374.050000] RSP: 0000007f7f8d4498 EFLAGS: 00000246
[42949374.050000] RAX: 0000000000000000 RBX: 0000007f7f8d44b0 RCX: ffffffffffffffff
[42949374.050000] RDX: 0000007f7f8d4770 RSI: 0000000040010900 RDI: 0000007f7f8d44b0
[42949374.050000] RBP: 0000000000402240 R08: 0000000000000000 R09: 0000000000000000
[42949374.050000] R10: 0000000000000064 R11: 0000000000000246 R12: 0000007f7f8d4640
[42949374.050000] R13: 0000000040001530 R14: 0000000000400040 R15: 0000000000000008
[42949374.050000] Call Trace:
[42949374.050000] 60433888: [<6001a10a>] panic_exit+0x2a/0x50
[42949374.050000] 60433898: [<60044acc>] notifier_call_chain+0x1c/0x30
[42949374.050000] 604338b8: [<600348cf>] panic+0xcf/0x170
[42949374.050000] 60433918: [<600285b4>] set_signals+0x14/0x30
[42949374.050000] 60433928: [<6001947b>] handle_page_fault+0x1bb/0x270
[42949374.050000] 60433998: [<600197b8>] segv+0x208/0x300
[42949374.050000] 60433a80: [<60019530>] segv_handler+0x0/0x80
[42949374.050000] 60433a98: [<600195ab>] segv_handler+0x7b/0x80
[42949374.050000] 60433ab8: [<6002ca18>] sig_handler_common_skas+0xe8/0x140
[42949374.050000] 60433ae8: [<6002873f>] sig_handler+0x5f/0x80
[42949374.050000] 60433c20: [<6001b450>] copy_chunk_to_user+0x0/0x40
[42949374.050000] 60433c88: [<6002b877>] ptrace_dump_regs+0x47/0x70
[42949374.050000] 60433dc0: [<60014010>] init+0x0/0x170
[42949374.050000] 60433dd8: [<6001a7a2>] new_thread_handler+0x102/0x140
[42949374.050000]
Please let me know if there's anything else you want me to try.
Thanks,
Alberto
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