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(parent: a5005c3) | patch
fuse: don't check refcount after stealing page
authorMiklos Szeredi <mszeredi@redhat.com>
Tue, 19 May 2020 12:50:37 +0000 (14:50 +0200)
committerMiklos Szeredi <mszeredi@redhat.com>
Tue, 19 May 2020 12:50:37 +0000 (14:50 +0200)
commit32f98877c57bee6bc27f443a96f49678a2cd6a50
tree0c4e6a0e64dc7ba0920c961432172518b6aa6b37tree | snapshot
parenta5005c3cda6eeb6b95645e6cc32f58dafeffc976commit | diff
fuse: don't check refcount after stealing page

page_count() is unstable.  Unless there has been an RCU grace period
between when the page was removed from the page cache and now, a
speculative reference may exist from the page cache.

Reported-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
fs/fuse/dev.c diff | blob | history
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