mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 18:49:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

NFSD: Prevent NULL dereference in nfsd4_process_cb_update()

Browse source 
@ses is initialized to NULL. If __nfsd4_find_backchannel() finds no
available backchannel session, setup_callback_client() will try to
dereference @ses and segfault.

Fixes: dcbeaa68db ("nfsd4: allow backchannel recovery")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2024-10-17 11:03:53 -04:00
parent da4f777e62
commit 1e02c641c3
1 changed files with 2 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
fs/nfsd/nfs4callback.c
View file

@ -1464,6 +1464,8 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
ses = c->cn_session; ses = c->cn_session;
} }
spin_unlock(&clp->cl_lock); spin_unlock(&clp->cl_lock);
if (!c)
return;
err = setup_callback_client(clp, &conn, ses); err = setup_callback_client(clp, &conn, ses);
if (err) { if (err) {