NFS: Fix a use after free in nfs_direct_join_group()
authorTrond Myklebust <trond.myklebust@hammerspace.com>
Wed, 9 Aug 2023 01:17:11 +0000 (21:17 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 Aug 2023 14:11:06 +0000 (16:11 +0200)
commit96fb46ef8281c749abe114ed9385cec39bae00e4
tree29e8e285158fce767b7e0bbdbc8e95c42bc78c6d
parentbdc544a87d43a4102aa08114fc939dbddf175f98
NFS: Fix a use after free in nfs_direct_join_group()

commit be2fd1560eb57b7298aa3c258ddcca0d53ecdea3 upstream.

Be more careful when tearing down the subrequests of an O_DIRECT write
as part of a retransmission.

Reported-by: Chris Mason <clm@fb.com>
Fixes: ed5d588fe47f ("NFS: Try to join page groups before an O_DIRECT retransmission")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/nfs/direct.c