From: Jeff Layton Date: Sat, 11 Jul 2015 10:43:01 +0000 (-0400) Subject: Revert "nfs: take extra reference to fl->fl_file when running a LOCKU operation" X-Git-Tag: firefly_0821_release~176^2~1418^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ed056764271e71004b3118619de1ebfefb2acf6b;p=firefly-linux-kernel-4.4.55.git Revert "nfs: take extra reference to fl->fl_file when running a LOCKU operation" This reverts commit db2efec0caba4f81a22d95a34da640b86c313c8e. William reported that he was seeing instability with this patch, which is likely due to the fact that it can cause the kernel to take a new reference to a filp after the last reference has already been put. Revert this patch for now, as we'll need to fix this in another way. Cc: stable@vger.kernel.org Reported-by: William Dauchy Signed-off-by: Jeff Layton Reviewed-by: "J. Bruce Fields" Tested-by: "J. Bruce Fields" --- diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 6f228b5af819..60be01f69b84 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5484,7 +5484,6 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, atomic_inc(&lsp->ls_count); /* Ensure we don't close file until we're done freeing locks! */ p->ctx = get_nfs_open_context(ctx); - get_file(fl->fl_file); memcpy(&p->fl, fl, sizeof(p->fl)); p->server = NFS_SERVER(inode); return p; @@ -5496,7 +5495,6 @@ static void nfs4_locku_release_calldata(void *data) nfs_free_seqid(calldata->arg.seqid); nfs4_put_lock_state(calldata->lsp); put_nfs_open_context(calldata->ctx); - fput(calldata->fl.fl_file); kfree(calldata); }