https://bugs.exim.org/show_bug.cgi?id=2469
Petr Pisar <ppisar@???> changed:
What |Removed |Added
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CC| |ppisar@???
--- Comment #5 from Petr Pisar <ppisar@???> ---
Linux mremap(2) supports it in a different way. From a manual:
If the value of old_size is zero, and old_address refers to a shareable
mapping
(see mmap(2) MAP_SHARED), then mremap() will create a new mapping of
the same
pages. new_size will be the size of the new mapping and the location of
the new
mapping may be specified with new_address; see the description of
MREMAP_FIXED
below. If a new mapping is requested via this method, then the
MREMAP_MAYMOVE
flag must also be specified.
But I worry MAP_REMAPDUP won't help you because you should get a failure on
changing the permissions from writeable to executable if the security policy is
correctly enforced.
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