Re: [uml-devel] kernel module support broken on x86-64?

[juergen.kadidlo@exasol.com]

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Boaz Harrosh schrieb:
> juergen.kadidlo@exasol.com wrote:
> <snip>
>   
>> except for the 2.6.26 which still exits with a panic on startup...
>>
>>     
>
> BTW: v2.6.26 checkout from Linus git crashes for me too
> 2.6.27-rc1 is fine (except it has another problem which I'm bisecting now)
>
> here is the BUG_ON trace:
> Stub registers -
>         0 - 0
>         1 - 0
>         2 - 0
>         3 - 0
>         4 - 0
>         5 - 0
>         6 - 0
>         7 - 0
>         8 - 0
>         9 - 0
>         10 - 0
>         11 - 0
>         12 - 0
>         13 - 0
>         14 - 0
>         15 - ffffffffffffffff
>         16 - 0
>         17 - 33
>         18 - 10216
>         19 - 2aaaaaab0f30
>         20 - 2b
>         21 - 2aaaaaaad910
>         22 - 0
>         23 - 0
>         24 - 0
>         25 - 0
>         26 - 0
> wait_stub_done : failed to wait for SIGTRAP, pid = 1348, n = 1348, errno = 0, status = 0xb7f
> Kernel panic - not syncing: Attempted to kill init!
>
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.26
> RIP: 0033:[<000000319e430a57>]
> RSP: 00007fff26d69cd8  EFLAGS: 00000206
> RAX: 0000000000000000 RBX: 000000000000053e RCX: ffffffffffffffff
> RDX: 0000000000000000 RSI: 0000000000000013 RDI: 000000000000053e
> RBP: 00007fff26d69d00 R08: 0000000000000000 R09: 00007fff26d69d00
> R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000053a
> R13: 0000000000000004 R14: 00007fff26d6b58c R15: 00007fff26d69fc0
> Call Trace:
> 6fc21778:  [<60013bc1>] panic_exit+0x2f/0x45
> 6fc21798:  [<600412f5>] notifier_call_chain+0x33/0x5b
> 6fc217d8:  [<60041326>] __atomic_notifier_call_chain+0x9/0xb
> 6fc217e8:  [<60041337>] atomic_notifier_call_chain+0xf/0x11
> 6fc217f8:  [<6002b8a1>] panic+0xe6/0x17d
> 6fc21818:  [<60053abe>] get_page_from_freelist+0x2a1/0x41f
> 6fc218b8:  [<6006a144>] kmem_cache_free+0x55/0x5e
> 6fc218e8:  [<6002eca3>] do_exit+0x6b/0x694
> 6fc21908:  [<60036bcd>] __dequeue_signal+0x10e/0x172
> 6fc21958:  [<6002f35c>] do_group_exit+0x90/0xbf
> 6fc21998:  [<60037c30>] get_signal_to_deliver+0x2ca/0x318
> 6fc219b8:  [<60026b7f>] wake_up_state+0xb/0xd
> 6fc219f8:  [<6001202d>] do_signal+0x1f8/0x2ca
> 6fc21a58:  [<6002023a>] set_signals+0x1c/0x2e
> 6fc21a78:  [<6003644f>] force_sig_info+0xb0/0xbf
> 6fc21ae8:  [<60013a26>] fatal_sigsegv+0x28/0x2d
> 6fc21b08:  [<60022647>] wait_stub_done+0xbd/0xc8
> 6fc21b48:  [<60021dd0>] do_syscall_stub+0xbb/0x1b6
> 6fc21b88:  [<60022032>] run_syscall_stub+0xd1/0xdd
> 6fc21bc8:  [<60023396>] write_ldt_entry+0x111/0x180
> 6fc21c48:  [<600235e4>] init_new_ldt+0x1df/0x303
> 6fc21c68:  [<60053cd6>] __alloc_pages_internal+0x9a/0x36e
> 6fc21cb8:  [<60053fc0>] __alloc_pages+0xb/0xd
> 6fc21d18:  [<60013fa4>] init_new_context+0xc9/0x10d
> 6fc21d28:  [<6002ab7b>] mm_alloc+0x4c/0x53
> 6fc21d58:  [<600711ce>] bprm_mm_init+0x4c/0x168
> 6fc21da8:  [<60071f6a>] do_execve+0x89/0x1db
> 6fc21dd8:  [<6000a854>] tcp_congestion_default+0x0/0x10
> 6fc21df8:  [<60010257>] execve1+0x27/0x42
> 6fc21e28:  [<600102cf>] um_execve+0xd/0x36
> 6fc21e38:  [<6006b945>] do_sys_open+0xc9/0xd8
> 6fc21e48:  [<60012354>] kernel_execve+0x2d/0x38
> 6fc21e78:  [<6000ff72>] run_init_process+0x1a/0x1c
> 6fc21e88:  [<60010029>] init_post+0xb5/0xe0
> 6fc21ea8:  [<60001574>] kernel_init+0x1d8/0x1e9
> 6fc21f48:  [<6001f309>] run_kernel_thread+0x41/0x4a
> 6fc21f58:  [<6000139c>] kernel_init+0x0/0x1e9
> 6fc21f98:  [<6001f2f0>] run_kernel_thread+0x28/0x4a
> 6fc21fc8:  [<600114be>] new_thread_handler+0x67/0x91
>
> Terminated
>   
Just want to mention that the stack trace looks identical here (using 
the 2.6.26 stable kernel)...
> Is there a plan to fix this for the 2.6.26 stable ?
>
> Please forgive me if this is old news and it's already
> been reported.
>
> Boaz
>   


-- 
Mit freundlichen Grüßen
Jürgen Kadidlo
---
Jürgen Kadidlo (Dipl.Inf.)
Developer
COS

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