From 34b09af4f54e6485e28f138ccad159611a240cc1 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Wed, 5 Aug 2020 15:10:11 -0400 Subject: [PATCH 1/2] nfsd: fix oops on mixed NFSv4/NFSv3 client access If an NFSv2/v3 client breaks an NFSv4 client's delegation, it will hit a NULL dereference in nfsd_breaker_owns_lease(). Easily reproduceable with for example mount -overs=4.2 server:/export /mnt/ sleep 1h Fixes: 28df3d1539de50 ("nfsd: clients don't need to break their own delegations") BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208807 Signed-off-by: J. Bruce Fields Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 81ed8e8bab3f..1ea9bbcc7c24 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4597,6 +4597,8 @@ static bool nfsd_breaker_owns_lease(struct file_lock *fl) if (!i_am_nfsd()) return NULL; rqst = kthread_data(current); + if (!rqst->rq_lease_breaker) + return NULL; clp = *(rqst->rq_lease_breaker); return dl->dl_stid.sc_client == clp; } From ad112aa8b1ac4bf5e8da67734fcb535fd3cd564e Mon Sep 17 00:00:00 2001 From: Wang Hai Date: Wed, 19 Aug 2020 10:49:43 +0800 Subject: [PATCH 2/2] SUNRPC: remove duplicate include Remove linux/sunrpc/auth_gss.h which is included more than once Reported-by: Hulk Robot Signed-off-by: Wang Hai Signed-off-by: Chuck Lever --- net/sunrpc/auth_gss/trace.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/sunrpc/auth_gss/trace.c b/net/sunrpc/auth_gss/trace.c index d26036a57443..76685abba60f 100644 --- a/net/sunrpc/auth_gss/trace.c +++ b/net/sunrpc/auth_gss/trace.c @@ -9,7 +9,6 @@ #include #include #include -#include #define CREATE_TRACE_POINTS #include