coredump: use prepare credential guard

Use the prepare credential guard for allocating a new set of
credentials.

Link: https://patch.msgid.link/20251103-work-creds-guards-prepare_creds-v1-9-b447b82f2c9b@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/coredump.c b/fs/coredump.c
index 79c681f1d64793a5256e1e261b767830b52c59b1..5424a6c4e360d68e3eaed22e2e935517b579775c 100644 (file)
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -1155,7 +1155,6 @@ static void do_coredump(struct core_name *cn, struct coredump_params *cprm,
 
 void vfs_coredump(const kernel_siginfo_t *siginfo)
 {
-       struct cred *cred __free(put_cred) = NULL;
        size_t *argv __free(kfree) = NULL;
        struct core_state core_state;
        struct core_name cn;
@@ -1183,7 +1182,7 @@ void vfs_coredump(const kernel_siginfo_t *siginfo)
        if (coredump_skip(&cprm, binfmt))
                return;
 
-       cred = prepare_creds();
+       CLASS(prepare_creds, cred)();
        if (!cred)
                return;
        /*