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[18/19] nfsd: use ktime_get_real_seconds() in nfs4_verifier

Message ID 20191111201639.2240623-19-arnd@arndb.de
State New, archived
Headers show
Series nfs, nfsd: avoid 32-bit time_t | expand

Commit Message

Arnd Bergmann Nov. 11, 2019, 8:16 p.m. UTC
gen_confirm() generates a unique identifier based on the current
time. This overflows in year 2038, but that is harmless since it
generally does not lead to duplicates, as long as the time has
been initialized by a real-time clock or NTP.

Using ktime_get_boottime_seconds() or ktime_get_seconds() would
avoid the overflow, but it would be more likely to result in
non-unique numbers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 fs/nfsd/nfs4state.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 885a09b3a2c0..cb416b9f6536 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2215,7 +2215,7 @@  static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
 	 * This is opaque to client, so no need to byte-swap. Use
 	 * __force to keep sparse happy
-	verf[0] = (__force __be32)get_seconds();
+	verf[0] = (__force __be32)(u32)ktime_get_real_seconds();
 	verf[1] = (__force __be32)nn->clverifier_counter++;
 	memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));