Messages in this thread | | | From | Roland McGrath <> | Subject | Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to fix a race | Date | Mon, 26 May 2008 23:12:09 -0700 (PDT) |
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> [<a00000010000a9f0>] skip_rbs_switch+0xe0/0x110 > sp=e000000141c9fe30 bsp=e000000141c90cf8 > [<a000000000010740>] __kernel_syscall_via_break+0x0/0x20 > sp=e000000141ca0000 bsp=e000000141c90cf8 > [<a0000001000971c0>] ptrace_stop+0xa0/0x3e0 > sp=e00000014716fdb0 bsp=e000000147160ca8 > [<a000000100097650>] ptrace_notify+0x150/0x1c0 > sp=e00000014716fdb0 bsp=e000000147160c88
If this is a backtrace of a single thread on the same kernel stack, it has a stack depth of over 84MB. You still need to follow the path inside ia64_ptrace_stop() to see how any of this is possible.
Thanks, Roland
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