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Dmitry Safonov
authored
commit eeec26d5 upstream. Michael noticed that userns limit for number of time namespaces is missing. Furthermore, time namespace introduced UCOUNT_TIME_NAMESPACES, but didn't introduce an array member in user_table[]. It would make array's initialisation OOB write, but by luck the user_table array has an excessive empty member (all accesses to the array are limited with UCOUNT_COUNTS - so it silently reuses the last free member. Fixes user-visible regression: max_inotify_instances by reason of the missing UCOUNT_ENTRY() has limited max number of namespaces instead of the number of inotify instances. Fixes: 769071ac ("ns: Introduce Time Namespace") Reported-by:Michael Kerrisk (man-pages) <mtk.manpages@gmail.com> Signed-off-by:
Dmitry Safonov <dima@arista.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Andrei Vagin <avagin@gmail.com> Acked-by:
Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: stable@k...