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unix: don't copy creds 

No need to copy kernel credentials.

Link: https://patch.msgid.link/20251103-work-creds-init_cred-v1-8-cb3ec8711a6a@kernel.org
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-03 00:12:47 +01:00
parent 0f0e7cee34
commit 1ad5b411af
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 4 additions and 13 deletions
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17
net/unix/af_unix.c
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@ -1210,25 +1210,16 @@ static struct sock *unix_find_bsd(struct sockaddr_un *sunaddr, int addr_len,
unix_mkname_bsd(sunaddr, addr_len);
if (flags & SOCK_COREDUMP) {
const struct cred *cred;
struct cred *kcred;
struct path root;
kcred = prepare_kernel_cred(&init_task);
if (!kcred) {
err = -ENOMEM;
goto fail;
}
task_lock(&init_task);
get_fs_root(init_task.fs, &root);
task_unlock(&init_task);
cred = override_creds(kcred);
err = vfs_path_lookup(root.dentry, root.mnt, sunaddr->sun_path,
LOOKUP_BENEATH | LOOKUP_NO_SYMLINKS |
LOOKUP_NO_MAGICLINKS, &path);
put_cred(revert_creds(cred));
scoped_with_kernel_creds()
err = vfs_path_lookup(root.dentry, root.mnt, sunaddr->sun_path,
LOOKUP_BENEATH | LOOKUP_NO_SYMLINKS |
LOOKUP_NO_MAGICLINKS, &path);
path_put(&root);
if (err)
goto fail;