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authorOleg Nesterov <oleg@tv-sign.ru>2008-04-30 00:54:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:49 -0700
commit12a3de0a965826096d8adc593bcf4392a7d5b459 (patch)
tree764d69c2973e67cb3ae58bec02e29cd616c40f90 /drivers/char/mxser.c
parent1dd768c0815334d2319d6377f0750ace075b6142 (diff)
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pids: sys_getpgid: fix unsafe *pid usage, s/tasklist/rcu/
1. sys_getpgid() needs rcu_read_lock() to derive the pgrp _nr, even if the task is current, otherwise we can race with another thread which does sys_setpgid(). 2. Use rcu_read_lock() instead of tasklist_lock when pid != 0, make sure that we don't use the NULL pid if the task exits right after successful find_task_by_vpid(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/mxser.c')
0 files changed, 0 insertions, 0 deletions
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