[lkml]   [2012]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 08/10] um: Fix possible race on task->mm
Am 24.03.2012 11:30, schrieb Anton Vorontsov:
> Checking for task->mm is dangerous as ->mm might disappear (exit_mm()
> assigns NULL under task_lock(), so tasklist lock is not enough).
> We can't use get_task_mm()/mmput() pair as mmput() might sleep,
> so let's take the task lock while we care about its mm.
> Note that we should also use find_lock_task_mm() to check all process'
> threads for a valid mm, but for uml we'll do it in a separate patch.
> Signed-off-by: Anton Vorontsov <>

Acked-by: Richard Weinberger <>


[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2012-03-24 12:15    [W:0.308 / U:0.436 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site