5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
[ Upstream commit b6c71c66b0ad8f2b59d9bc08c7a5079b110bec01 ]
nfsd_file_put_noref() can free @nf, so don't dereference @nf
immediately upon return from nfsd_file_put_noref().
Suggested-by: Trond Myklebust <trondmy@xxxxxxxxxxxxxxx>
Fixes: 999397926ab3 ("nfsd: Clean up nfsd_file_put()")
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/filecache.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 27952e2f3aa14..1d3d13b78be0e 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -302,11 +302,12 @@ nfsd_file_put(struct nfsd_file *nf)
if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) {
nfsd_file_flush(nf);
nfsd_file_put_noref(nf);
- } else {
+ } else if (nf->nf_file) {
nfsd_file_put_noref(nf);
- if (nf->nf_file)
- nfsd_file_schedule_laundrette();
- }
+ nfsd_file_schedule_laundrette();
+ } else
+ nfsd_file_put_noref(nf);
+
if (atomic_long_read(&nfsd_filecache_count) >= NFSD_FILE_LRU_LIMIT)
nfsd_file_gc();
}
--
2.43.0
