diff mbox series

[v2,08/12] nfsd: fix delay timer on 32-bit architectures

Message ID 20191213141046.1770441-9-arnd@arndb.de
State Accepted
Commit 2561c92b12f4f4e386d453556685f75775c0938b
Headers show
Series nfsd: avoid 32-bit time_t | expand

Commit Message

Arnd Bergmann Dec. 13, 2019, 2:10 p.m. UTC 
The nfsd4_cb_layout_done() function takes a 'time_t' value,
multiplied by NSEC_PER_SEC*2 to get a nanosecond value.

This works fine on 64-bit architectures, but on 32-bit, any
value over 1 second results in a signed integer overflow
with unexpected results.

Cast one input to a 64-bit type in order to produce the
same result that we have on 64-bit architectures, regarless
of the type of nfsd4_lease.

Fixes: 6b9b21073d3b ("nfsd: give up on CB_LAYOUTRECALLs after two lease periods")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 fs/nfsd/nfs4layouts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.20.0
diff mbox series

Patch

diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 2681c70283ce..e12409eca7cc 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -675,7 +675,7 @@  nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
 
 		/* Client gets 2 lease periods to return it */
 		cutoff = ktime_add_ns(task->tk_start,
-					 nn->nfsd4_lease * NSEC_PER_SEC * 2);
+					 (u64)nn->nfsd4_lease * NSEC_PER_SEC * 2);
 
 		if (ktime_before(now, cutoff)) {
 			rpc_delay(task, HZ/100); /* 10 mili-seconds */