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Message-Id: <20251103-work-creds-guards-prepare_creds-v1-3-b447b82f2c9b@kernel.org> Date: Mon, 03 Nov 2025 15:57:29 +0100 From: Christian Brauner <brauner@...nel.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-aio@...ck.org, linux-unionfs@...r.kernel.org, linux-erofs@...ts.ozlabs.org, linux-nfs@...r.kernel.org, linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org, cgroups@...r.kernel.org, netdev@...r.kernel.org, linux-crypto@...r.kernel.org, linux-trace-kernel@...r.kernel.org, Christian Brauner <brauner@...nel.org> Subject: [PATCH 03/12] sev-dev: use prepare credential guard Use the prepare credential guard for allocating a new set of credentials. Signed-off-by: Christian Brauner <brauner@...nel.org> --- drivers/crypto/ccp/sev-dev.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index c5e22af04abb..09e4c9490d58 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -268,15 +268,16 @@ static struct file *open_file_as_root(const char *filename, int flags, umode_t m get_fs_root(init_task.fs, &root); task_unlock(&init_task); - cred = prepare_creds(); + CLASS(prepare_creds, cred)(); if (!cred) return ERR_PTR(-ENOMEM); + cred->fsuid = GLOBAL_ROOT_UID; old_cred = override_creds(cred); fp = file_open_root(&root, filename, flags, mode); - put_cred(revert_creds(old_cred)); + revert_creds(old_cred); return fp; } -- 2.47.3
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