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| author | Tejun Heo <[email protected]> | 2011-06-02 09:14:00 +0000 |
|---|---|---|
| committer | Oleg Nesterov <[email protected]> | 2011-06-04 16:17:11 +0000 |
| commit | 7dd3db54e77d21eb95e145f19ba53f68250d0e73 (patch) | |
| tree | 628e44b22e6fbf2828cf2c533c41b3d24f3e3ec9 /security/selinux/hooks.c | |
| parent | job control: make task_clear_jobctl_pending() clear TRAPPING automatically (diff) | |
| download | kernel-7dd3db54e77d21eb95e145f19ba53f68250d0e73.tar.gz kernel-7dd3db54e77d21eb95e145f19ba53f68250d0e73.zip | |
job control: introduce task_set_jobctl_pending()
task->jobctl currently hosts JOBCTL_STOP_PENDING and will host TRAP
pending bits too. Setting pending conditions on a dying task may make
the task unkillable. Currently, each setting site is responsible for
checking for the condition but with to-be-added job control traps this
becomes too fragile.
This patch adds task_set_jobctl_pending() which should be used when
setting task->jobctl bits to schedule a stop or trap. The function
performs the followings to ease setting pending bits.
* Sanity checks.
* If fatal signal is pending or PF_EXITING is set, no bit is set.
* STOP_SIGMASK is automatically cleared if new value is being set.
do_signal_stop() and ptrace_attach() are updated to use
task_set_jobctl_pending() instead of setting STOP_PENDING explicitly.
The surrounding structures around setting are changed to fit
task_set_jobctl_pending() better but there should be no userland
visible behavior difference.
Signed-off-by: Tejun Heo <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Signed-off-by: Oleg Nesterov <[email protected]>
Diffstat (limited to 'security/selinux/hooks.c')
0 files changed, 0 insertions, 0 deletions