Eddy Wu 362dfa5e02 fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent ...

commit b4e00444ca upstream.

current->group_leader->exit_signal may change during copy_process() if
current->real_parent exits.

Move the assignment inside tasklist_lock to avoid the race.

Signed-off-by: Eddy Wu <eddy_wu@trendmicro.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-11-10 12:39:08 +01:00

74 KiB

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