CVS commit: src/sys/compat/netbsd32

["Emmanuel Dreyfus" <manu%netbsd.org@localhost>]

Module Name:    src
Committed By:   manu
Date:           Thu Jan 23 10:50:14 UTC 2014

Modified Files:
        src/sys/compat/netbsd32: netbsd32_event.c

Log Message:
Fix netbsd32 compatibility bug in kevent()

The keo_put_events() callback copies the events from kernel to userland.
It is called for sets of up to 8 events (constant chosen in kevbuf
definitition in kevent1()). The callback is called with pointer to userland
buffer, count of events to copy, and an index parameter which tracks where
we are in userland buffer when called multiple time.

COMPAT_NETBSD32's flavor of keo_put_events() is netbsd32_kevent_put_events().
It did not honour the index parameter, which caused invalid event data to
be returned when userland requested more that 8 events. This caused many
reliability problems, and the obvious startup crash of dovecot log process
when it accessed udata in the nineth event in its buffer, which was NULL.


To generate a diff of this commit:
cvs rdiff -u -r1.9 -r1.10 src/sys/compat/netbsd32/netbsd32_event.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.