From: Dai Ngo <dai.ngo@oracle.com>
To: bfields@fieldses.org
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH 0/2] NFSD: Fix use-after-free warning when doing inter-server copy
Date: Thu, 29 Oct 2020 15:07:14 -0400 [thread overview]
Message-ID: <20201029190716.70481-1-dai.ngo@oracle.com> (raw)
Observed use-after-free messages in /var/log/messages of destination
server when doing inter-server copy. These come from 2 different places
in the code, one from the nfsd4_cleanup_inter_ssc when nfsd_file_put
is called for the source file and the other from nfs4_put_copy when
it's called from nfsd4_cb_offload_release.
Fixed by removing the call to nfsd_file_put; the object is not allocated
by nfsd_file_alloc, and by initializing refcount for nfsd4_copy in
nfsd4_do_async_copy.
fs/nfsd/nfs4proc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
next reply other threads:[~2020-10-29 19:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 19:07 Dai Ngo [this message]
2020-10-29 19:07 ` [PATCH 1/2] NFSD: Fix use-after-free warning when doing inter-server copy Dai Ngo
2021-02-20 0:18 ` Olga Kornievskaia
2021-02-20 1:09 ` J. Bruce Fields
2021-02-20 1:15 ` dai.ngo
2021-02-20 1:31 ` dai.ngo
2021-02-20 3:20 ` J. Bruce Fields
2021-02-20 3:41 ` dai.ngo
2021-02-20 14:08 ` Olga Kornievskaia
2021-02-21 4:16 ` dai.ngo
2021-02-22 18:34 ` dai.ngo
2021-02-22 21:46 ` dai.ngo
2021-02-22 22:01 ` dai.ngo
2021-02-22 22:08 ` dai.ngo
2021-02-24 22:35 ` Olga Kornievskaia
2021-02-25 2:26 ` dai.ngo
2021-02-25 18:58 ` dai.ngo
2021-03-01 18:15 ` Chuck Lever
2020-10-29 19:07 ` [PATCH 2/2] NFSD: fix missing refcount in nfsd4_copy by nfsd4_do_async_copy Dai Ngo
2020-11-05 22:25 ` [PATCH 0/2] NFSD: Fix use-after-free warning when doing inter-server copy J. Bruce Fields
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