Messages in this thread | | | Date | Thu, 15 Nov 2018 13:43:18 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH] Uprobes: Fix kernel oops with delayed_uprobe_remove() |
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On 11/15, Ravi Bangoria wrote: > > There could be a race between task exit and probe unregister: > > exit_mm() > mmput() > __mmput() uprobe_unregister() > uprobe_clear_state() put_uprobe() > delayed_uprobe_remove() delayed_uprobe_remove() > > put_uprobe() is calling delayed_uprobe_remove() without taking > delayed_uprobe_lock and thus the race sometimes results in a > kernel crash. Fix this by taking delayed_uprobe_lock before > calling delayed_uprobe_remove() from put_uprobe(). > > Detailed crash log can be found at: > https://lkml.org/lkml/2018/11/1/1244
Thanks, looks good,
Oleg.
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