Re: [PATCH 7/7] uprobes: Fix the racy uprobe->flags manipulation

[Srikar Dronamraju]

* Oleg Nesterov <oleg@xxxxxxxxxx> [2012-09-30 21:42:27]:

> Multiple threads can manipulate uprobe->flags, this is obviously
> unsafe. For example mmap can set UPROBE_COPY_INSN while register
> tries to set UPROBE_RUN_HANDLER, the latter can also race with
> can_skip_sstep() which clears UPROBE_SKIP_SSTEP.
> 
> Change this code to use bitops.
> 
> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>

Acked-by: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>

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