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Scott Mayhew 16b859e6ec NFS: Use parent's objective cred in nfs_access_login_time() ...

[ Upstream commit a10a923307 ]

The subjective cred (task->cred) can potentially be overridden and
subsquently freed in non-RCU context, which could lead to a panic if we
try to use it in cred_fscmp().  Use __task_cred(), which returns the
objective cred (task->real_cred) instead.

Fixes: 0eb43812c0 ("NFS: Clear the file access cache upon login")
Fixes: 5e9a7b9c2e ("NFS: Fix up a sparse warning")

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-01-25 15:44:44 -08:00

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