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Steps to reproduce:
1. at the shell prompt, type "gdb /bin/ls"
2. type "run"
The problem appears on 2.6.18.1-bb2 and 2.6.22.9 for amd64. i386
2.6.22.9 seems to be immune.
We get stacktrace:
[42949389.790000] Kernel panic - not syncing: get_fpregs
[42949389.790000]
[42949389.790000] Pid: 1141, comm: gdb Not tainted 2.6.22.9
[42949389.790000] RIP: 0033:[<00000000406f93d9>]
[42949389.790000] RSP: 0000007f7ffa1d18 EFLAGS: 00000202
[42949389.790000] RAX: ffffffffffffffda RBX: 0000000000000476 RCX:
fffffffffffff
fff
[42949389.790000] RDX: 0000000000000000 RSI: 0000000000000476 RDI:
0000000000000
00e
[42949389.790000] RBP: 0000007f7ffa1da0 R08: 000000000000000e R09:
000000004001f
0f0
[42949389.790000] R10: 0000007f7ffa1da0 R11: 0000000000000202 R12:
0000007f7ffa1
fa0
[42949389.790000] R13: 0000007f7ffa2660 R14: 0000000000887030 R15:
0000000000000
000
[42949389.790000] Call Trace:
[42949389.790000] 6ffafcc8: [<60019374>] panic_exit+0x2f/0x49
[42949389.790000] 6ffafce8: [<6003df71>] notifier_call_chain+0x33/0x65
[42949389.790000] 6ffafd28: [<6003e033>]
__atomic_notifier_call_chain+0x9/0xb
[42949389.790000] 6ffafd38: [<6003e044>]
atomic_notifier_call_chain+0xf/0x11
[42949389.790000] 6ffafd48: [<600314ea>] panic+0xe6/0x17d
[42949389.790000] 6ffafd68: [<600618c2>] get_user_pages+0x2cb/0x32c
[42949389.790000] 6ffafda8: [<601d5070>] __up_read+0x80/0x85
[42949389.790000] 6ffafdd8: [<6001a3cd>] buffer_op+0x2e/0x5f
[42949389.790000] 6ffafe18: [<6001a526>] copy_to_user_skas+0x78/0x7a
[42949389.790000] 6ffafe38: [<6002bbbf>] set_fpregs+0x0/0x10
[42949389.790000] 6ffafe48: [<60017232>] arch_ptrace+0x2b6/0x348
[42949389.790000] 6ffafe88: [<60039768>] ptrace_check_attach+0x7f/0x8f
[42949389.790000] 6ffafe90: [<60042429>] find_task_by_pid_type+0x18/0x1b
[42949389.790000] 6ffafeb8: [<60039e22>] sys_ptrace+0x7c/0xa2
[42949389.790000] 6ffafef8: [<60019cc1>] handle_syscall+0x65/0x80
[42949389.790000] 6ffaff28: [<60029d2c>] handle_trap+0xec/0xf7
[42949389.790000] 6ffaff68: [<6002a1a7>] userspace+0x14a/0x19d
[42949389.790000] 6ffaffc8: [<600199d2>] fork_handler+0x86/0x8d
[42949389.790000]
Good luck Jim,
- --
<< Tout n'y est pas parfait, mais on y honore certainement les
jardiniers >>
Dominique Quatravaux <[EMAIL PROTECTED]>
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