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afs: Prevent callback expiry timer overflow

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get_seconds() returns real wall-clock seconds. On 32-bit systems
this value will overflow in year 2038 and beyond. This patch changes
afs_vnode record to use ktime_get_real_seconds() instead, for the
fields cb_expires and cb_expires_at.

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Tina Ruchandani
2017-03-16 16:27:46 +00:00
committed by David Howells
parent 8a79790bf0
commit 56e714312e
3 changed files with 7 additions and 6 deletions
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2
fs/afs/fsclient.c
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@@ -145,7 +145,7 @@ static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
vnode->cb_version = ntohl(*bp++);
vnode->cb_expiry = ntohl(*bp++);
vnode->cb_type = ntohl(*bp++);
vnode->cb_expires = vnode->cb_expiry + get_seconds();
vnode->cb_expires = vnode->cb_expiry + ktime_get_real_seconds();
*_bp = bp;
}