linux-kernel - [v4.17-rc5][bisected] be83bbf80682 breaks /proc/vmcore mmap

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Message-Id: <cover.thread-4f3684.your-ad-here.call-01526696764-ext-9375@work.hours>
Date:   Sat, 19 May 2018 05:15:22 +0200
From:   Vasily Gorbik <gor@...ux.ibm.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>
Cc:     linux-kernel@...r.kernel.org,
        Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [v4.17-rc5][bisected] be83bbf80682 breaks /proc/vmcore mmap

Greetings,

be83bbf80682 "mmap: introduce sane default mmap limits" introduced a
problem with mapping /proc/vmcore if it is bigger than 2gb. This
breaks s390 kernel zfcpdump. But it should be a general problem.

Please consider the following one-liner fix, if it makes sense.

Vasily Gorbik (1):
  procfs: fix mmap() for /proc/vmcore

 fs/proc/inode.c | 1 +
 1 file changed, 1 insertion(+)

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