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authorNeilBrown <neilb@suse.com>2019-01-03 11:04:08 +1100
committerJeff Layton <jlayton@kernel.org>2019-01-02 20:14:50 -0500
commitbf77ae4c98d721a9aae3840970d46669a78e034a (patch)
tree1455f36d7c23d38d42b0fa8709660c0e91bfd57c /arch
parentMerge tag 'iommu-updates-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu (diff)
downloadlinux-dev-bf77ae4c98d721a9aae3840970d46669a78e034a.tar.xz
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locks: fix error in locks_move_blocks()
After moving all requests from fl->fl_blocked_requests to new->fl_blocked_requests it is nonsensical to do anything to all the remaining elements, there aren't any. This should do something to all the requests that have been moved. For simplicity, it does it to all requests in the target list. Setting "f->fl_blocker = new" to all members of new->fl_blocked_requests is "obviously correct" as it preserves the invariant of the linkage among requests. Reported-by: syzbot+239d99847eb49ecb3899@syzkaller.appspotmail.com Fixes: 5946c4319ebb ("fs/locks: allow a lock request to block other requests.") Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Jeff Layton <jlayton@kernel.org>
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