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There have historically been two big uses of do_exit. The first is it's design use to be the guts of the exit(2) system call. The second use is to terminate a task after something catastrophic has happened like a NULL pointer in kernel code. The function make_task_dead has been added to accomidate the second use. The call to do_exit in Linvalidmask is clearly not a normal userspace exit. As failure handling there are two possible ways to go. If userspace can trigger the issue force_exit_sig should be called. Otherwise make_task_dead probably from the implementation of die is appropriate. Replace the call of do_exit in Linvalidmask with make_task_dead as I don't know xtensa and especially xtensa assembly language well enough to do anything else. Link: https://lkml.kernel.org/r/YdUmN7n4W5YETUhW@zeniv-ca.linux.org.uk Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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