linux/fs/exec.c
Kees Cook 3c270e64a3 exec: Limit arg stack to at most 75% of _STK_LIM
commit da029c11e6 upstream.

To avoid pathological stack usage or the need to special-case setuid
execs, just limit all arg stack usage to at most 75% of _STK_LIM (6MB).

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.16: replaced code is slightly different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2018-10-03 04:10:08 +01:00

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39 KiB