__fh_verify() added a call to svc_xprt_set_valid() to help do connection
management but during LOCALIO path rqstp argument is NULL, leading to
NULL pointer dereferencing and a crash.
Fixes: eccbbc7c00a5 ("nfsd: don't use sv_nrthreads in connection limiting calculations.")
Signed-off-by: Olga Kornievskaia <okorniev@xxxxxxxxxx>
---
fs/nfsd/nfsfh.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index bf59f83c6224..91bf0e6d5895 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -381,8 +381,9 @@ __fh_verify(struct svc_rqst *rqstp,
error = check_nfsd_access(exp, rqstp, may_bypass_gss);
if (error)
goto out;
-
- svc_xprt_set_valid(rqstp->rq_xprt);
+ /* During LOCALIO call to fh_verify will be called with a NULL rqstp */
+ if (rqstp)
+ svc_xprt_set_valid(rqstp->rq_xprt);
/* Finally, check access permissions. */
error = nfsd_permission(cred, exp, dentry, access);
--
2.47.1
