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coredump: use override credential guard

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Use override credential guards for scoped credential override with
automatic restoration on scope exit.

Link: https://patch.msgid.link/20251103-work-creds-guards-prepare_creds-v1-10-b447b82f2c9b@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-03 15:57:36 +01:00
parent 8ed3473c5a
commit 545985dd37
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 2 additions and 6 deletions
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8
fs/coredump.c
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@ -1160,7 +1160,6 @@ void vfs_coredump(const kernel_siginfo_t *siginfo)
struct core_name cn;
const struct mm_struct *mm = current->mm;
const struct linux_binfmt *binfmt = mm->binfmt;
const struct cred *old_cred;
int argc = 0;
struct coredump_params cprm = {
.siginfo = siginfo,
@ -1197,11 +1196,8 @@ void vfs_coredump(const kernel_siginfo_t *siginfo)
if (coredump_wait(siginfo->si_signo, &core_state) < 0)
return;
old_cred = override_creds(cred);
do_coredump(&cn, &cprm, &argv, &argc, binfmt);
revert_creds(old_cred);
scoped_with_creds(cred)
do_coredump(&cn, &cprm, &argv, &argc, binfmt);
coredump_cleanup(&cn, &cprm);
return;
}