[v2,01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g

Message ID	20241125-work-cred-v2-1-68b9d38bb5b2@kernel.org
State	New
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D907F1AF0DB; Mon, 25 Nov 2024 14:10:23 +0000 (UTC) From: Christian Brauner <brauner@kernel.org> Date: Mon, 25 Nov 2024 15:09:57 +0100 Subject: [PATCH v2 01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20241125-work-cred-v2-1-68b9d38bb5b2@kernel.org> References: <20241125-work-cred-v2-0-68b9d38bb5b2@kernel.org> In-Reply-To: <20241125-work-cred-v2-0-68b9d38bb5b2@kernel.org> To: Linus Torvalds <torvalds@linux-foundation.org> Cc: Amir Goldstein <amir73il@gmail.com>, Miklos Szeredi <miklos@szeredi.hu>, Al Viro <viro@zeniv.linux.org.uk>, Jens Axboe <axboe@kernel.dk>, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Christian Brauner <brauner@kernel.org>
Series	cred: rework {override,revert}_creds() \| expand [v2,00/29] cred: rework {override,revert}_creds() [v2,01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g [v2,02/29] cred: return old creds from revert_creds_light() [v2,03/29] tree-wide: s/revert_creds()/put_cred(revert_creds_light())/g [v2,04/29] cred: remove old {override,revert}_creds() helpers [v2,05/29] tree-wide: s/override_creds_light()/override_creds()/g [v2,06/29] tree-wide: s/revert_creds_light()/revert_creds()/g [v2,07/29] firmware: avoid pointless reference count bump [v2,08/29] sev-dev: avoid pointless cred reference count bump [v2,09/29] target_core_configfs: avoid pointless cred reference count bump [v2,10/29] aio: avoid pointless cred reference count bump [v2,11/29] binfmt_misc: avoid pointless cred reference count bump [v2,12/29] coredump: avoid pointless cred reference count bump [v2,13/29] nfs/localio: avoid pointless cred reference count bumps [v2,14/29] nfs/nfs4idmap: avoid pointless reference count bump [v2,15/29] nfs/nfs4recover: avoid pointless cred reference count bump [v2,16/29] nfsfh: avoid pointless cred reference count bump [v2,17/29] open: avoid pointless cred reference count bump [v2,18/29] ovl: avoid pointless cred reference count bump [v2,19/29] cifs: avoid pointless cred reference count bump [v2,20/29] cifs: avoid pointless cred reference count bump [v2,21/29] smb: avoid pointless cred reference count bump [v2,22/29] io_uring: avoid pointless cred reference count bump [v2,23/29] acct: avoid pointless reference count bump [v2,24/29] cgroup: avoid pointless cred reference count bump [v2,25/29] trace: avoid pointless cred reference count bump [v2,26/29] dns_resolver: avoid pointless cred reference count bump [v2,27/29] cachefiles: avoid pointless cred reference count bump [v2,28/29] nfsd: avoid pointless cred reference count bump [v2,29/29] cred: remove unused get_new_cred()

diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index 324a9a3c087aa2e2c4e0b53b30a2f11f61195aa3..74039d6b2b71b91d0d1d57b71f74501abaf646e2 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -912,7 +912,7 @@ _request_firmware(const struct firmware **firmware_p, const char *name, ret = -ENOMEM; goto out; } - old_cred = override_creds(kern_cred); + old_cred = override_creds_light(get_new_cred(kern_cred)); ret = fw_get_filesystem_firmware(device, fw->priv, "", NULL); diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index af018afd9cd7fc68c5f9004e2d0a2ee162d8c4b9..2ad6e41af085a400e88b3207c9b55345f57526e1 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -244,7 +244,7 @@ static struct file *open_file_as_root(const char *filename, int flags, umode_t m if (!cred) return ERR_PTR(-ENOMEM); cred->fsuid = GLOBAL_ROOT_UID; - old_cred = override_creds(cred); + old_cred = override_creds_light(get_new_cred(cred)); fp = file_open_root(&root, filename, flags, mode); path_put(&root); diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index c40217f44b1bc53d149e8d5ea12c0e5297373800..be98d16b2c57c933ffe2c2477b881144f2283630 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -3756,7 +3756,7 @@ static int __init target_core_init_configfs(void) ret = -ENOMEM; goto out; } - old_cred = override_creds(kern_cred); + old_cred = override_creds_light(get_new_cred(kern_cred)); target_init_dbroot(); revert_creds(old_cred); put_cred(kern_cred); diff --git a/fs/aio.c b/fs/aio.c index 50671640b5883f5d20f652e23c4ea3fe04c989f2..a52fe2e999e73b00af9a19f1c01f0e384f667871 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1639,7 +1639,7 @@ static int aio_write(struct kiocb *req, const struct iocb *iocb, static void aio_fsync_work(struct work_struct *work) { struct aio_kiocb *iocb = container_of(work, struct aio_kiocb, fsync.work); - const struct cred *old_cred = override_creds(iocb->fsync.creds); + const struct cred *old_cred = override_creds_light(get_new_cred(iocb->fsync.creds)); iocb->ki_res.res = vfs_fsync(iocb->fsync.file, iocb->fsync.datasync); revert_creds(old_cred); diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 31660d8cc2c610bd42f00f1de7ed6c39618cc5db..f8355eee3d19ef6d20565ec1938e8691ba084d83 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -826,7 +826,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer, * didn't matter much as only a privileged process could open * the register file. */ - old_cred = override_creds(file->f_cred); + old_cred = override_creds_light(get_new_cred(file->f_cred)); f = open_exec(e->interpreter); revert_creds(old_cred); if (IS_ERR(f)) { diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 7b99bd98de75b8d95e09da1ca7cd1bb3378fcc62..b156cc2e0e63b28b521923b578cb3547dece5e66 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -393,7 +393,7 @@ extern int cachefiles_determine_cache_security(struct cachefiles_cache *cache, static inline void cachefiles_begin_secure(struct cachefiles_cache *cache, const struct cred **_saved_cred) { - *_saved_cred = override_creds(cache->cache_cred); + *_saved_cred = override_creds_light(get_new_cred(cache->cache_cred)); } static inline void cachefiles_end_secure(struct cachefiles_cache *cache, diff --git a/fs/coredump.c b/fs/coredump.c index d48edb37bc35c0896d97a2f6a6cc259d8812f936..b6aae41b80d22bfed78eed6f3e45bdeb5d2daf06 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -576,7 +576,7 @@ void do_coredump(const kernel_siginfo_t *siginfo) if (retval < 0) goto fail_creds; - old_cred = override_creds(cred); + old_cred = override_creds_light(get_new_cred(cred)); ispipe = format_corename(&cn, &cprm, &argv, &argc); diff --git a/fs/nfs/localio.c b/fs/nfs/localio.c index 8f0ce82a677e1589092a30240d6e60a289d64a58..018e8159c5679757f9fbf257ad3ef60e89d3ee09 100644 --- a/fs/nfs/localio.c +++ b/fs/nfs/localio.c @@ -371,7 +371,7 @@ static void nfs_local_call_read(struct work_struct *work) struct iov_iter iter; ssize_t status; - save_cred = override_creds(filp->f_cred); + save_cred = override_creds_light(get_new_cred(filp->f_cred)); nfs_local_iter_init(&iter, iocb, READ); @@ -541,7 +541,7 @@ static void nfs_local_call_write(struct work_struct *work) ssize_t status; current->flags |= PF_LOCAL_THROTTLE | PF_MEMALLOC_NOIO; - save_cred = override_creds(filp->f_cred); + save_cred = override_creds_light(get_new_cred(filp->f_cred)); nfs_local_iter_init(&iter, iocb, WRITE); diff --git a/fs/nfs/nfs4idmap.c b/fs/nfs/nfs4idmap.c index 25a7c771cfd89f3e6d494f26a78212d3d619c135..b9442f70271d8397fb36dcb62570f6d304fe5c71 100644 --- a/fs/nfs/nfs4idmap.c +++ b/fs/nfs/nfs4idmap.c @@ -311,7 +311,7 @@ static ssize_t nfs_idmap_get_key(const char *name, size_t namelen, const struct user_key_payload *payload; ssize_t ret; - saved_cred = override_creds(id_resolver_cache); + saved_cred = override_creds_light(get_new_cred(id_resolver_cache)); rkey = nfs_idmap_request_key(name, namelen, type, idmap); revert_creds(saved_cred); diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c index 93e33d1ee8917fc5d462f56b5c65380f7555e638..614a5ec4824b4ab9f6faa132c565688c94261704 100644 --- a/fs/nfsd/auth.c +++ b/fs/nfsd/auth.c @@ -79,7 +79,7 @@ int nfsd_setuser(struct svc_cred *cred, struct svc_export *exp) else new->cap_effective = cap_raise_nfsd_set(new->cap_effective, new->cap_permitted); - put_cred(override_creds(new)); + put_cred(override_creds_light(get_new_cred(new))); put_cred(new); return 0; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index b7d61eb8afe9e10d94b614ae50c2790fe6816732..f55ed06611aaaffa6dc8723b96b9876a3a3db0f7 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -81,7 +81,7 @@ nfs4_save_creds(const struct cred **original_creds) new->fsuid = GLOBAL_ROOT_UID; new->fsgid = GLOBAL_ROOT_GID; - *original_creds = override_creds(new); + *original_creds = override_creds_light(get_new_cred(new)); put_cred(new); return 0; } diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index 40ad58a6a0361e48a48262a2c61abbcfd908a3bb..8e323cc8e2c5b26ec660ceedeb95be4ef0ac809e 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -221,7 +221,7 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct net *net, new->cap_effective = cap_raise_nfsd_set(new->cap_effective, new->cap_permitted); - put_cred(override_creds(new)); + put_cred(override_creds_light(get_new_cred(new))); put_cred(new); } else { error = nfsd_setuser_and_check_port(rqstp, cred, exp); diff --git a/fs/open.c b/fs/open.c index e6911101fe71d665d5f1a6346e5f82212bb8ed65..2459cd061f47f46756b7d0a7bf2f563b631ec1d5 100644 --- a/fs/open.c +++ b/fs/open.c @@ -448,7 +448,7 @@ static const struct cred *access_override_creds(void) */ override_cred->non_rcu = 1; - old_cred = override_creds(override_cred); + old_cred = override_creds_light(get_new_cred(override_cred)); /* override_cred() gets its own ref */ put_cred(override_cred); diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 3601ddfeddc2ec70764756905d528570ad1020e1..527b041213c8166d60d6a273675c2e2bc18dec36 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -741,7 +741,7 @@ static int ovl_prep_cu_creds(struct dentry *dentry, struct ovl_cu_creds *cc) return err; if (cc->new) - cc->old = override_creds(cc->new); + cc->old = override_creds_light(get_new_cred(cc->new)); return 0; } diff --git a/fs/smb/client/cifs_spnego.c b/fs/smb/client/cifs_spnego.c index af7849e5974ff36619405a12e667e7543bb3926f..da89c334dff3d77ac02b37ae9668d40e04241942 100644 --- a/fs/smb/client/cifs_spnego.c +++ b/fs/smb/client/cifs_spnego.c @@ -157,7 +157,7 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo, sprintf(dp, ";pid=0x%x", current->pid); cifs_dbg(FYI, "key description = %s\n", description); - saved_cred = override_creds(spnego_cred); + saved_cred = override_creds_light(get_new_cred(spnego_cred)); spnego_key = request_key(&cifs_spnego_key_type, description, ""); revert_creds(saved_cred); diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c index 1d294d53f662479c0323d5f5a645478c6f590062..136fd84cba004e0e89996e29abcac154dce8674b 100644 --- a/fs/smb/client/cifsacl.c +++ b/fs/smb/client/cifsacl.c @@ -292,7 +292,7 @@ id_to_sid(unsigned int cid, uint sidtype, struct smb_sid *ssid) return -EINVAL; rc = 0; - saved_cred = override_creds(root_cred); + saved_cred = override_creds_light(get_new_cred(root_cred)); sidkey = request_key(&cifs_idmap_key_type, desc, ""); if (IS_ERR(sidkey)) { rc = -EINVAL; @@ -398,7 +398,7 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct smb_sid *psid, if (!sidstr) return -ENOMEM; - saved_cred = override_creds(root_cred); + saved_cred = override_creds_light(get_new_cred(root_cred)); sidkey = request_key(&cifs_idmap_key_type, sidstr, ""); if (IS_ERR(sidkey)) { cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n", diff --git a/fs/smb/server/smb_common.c b/fs/smb/server/smb_common.c index 75b4eb856d32f7ddc856ad5cf04906638cede0b5..c2a59956e3a51b7727a7e358f3842d92d70f085d 100644 --- a/fs/smb/server/smb_common.c +++ b/fs/smb/server/smb_common.c @@ -780,7 +780,7 @@ int __ksmbd_override_fsids(struct ksmbd_work *work, cred->cap_effective = cap_drop_fs_set(cred->cap_effective); WARN_ON(work->saved_cred); - work->saved_cred = override_creds(cred); + work->saved_cred = override_creds_light(get_new_cred(cred)); if (!work->saved_cred) { abort_creds(cred); return -EINVAL; diff --git a/include/linux/cred.h b/include/linux/cred.h index e4a3155fe409d6b991fa6639005ebc233fc17dcc..b0bc1fea9ca05a26f4fa719f1d4701f010994288 100644 --- a/include/linux/cred.h +++ b/include/linux/cred.h @@ -211,9 +211,10 @@ static inline struct cred *get_new_cred_many(struct cred *cred, int nr) * Get a reference on the specified set of new credentials. The caller must * release the reference. */ -static inline struct cred *get_new_cred(struct cred *cred) +static inline struct cred *get_new_cred(const struct cred *cred) { - return get_new_cred_many(cred, 1); + struct cred *nonconst_cred = (struct cred *) cred; + return get_new_cred_many(nonconst_cred, 1); } /** diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 8012933998837ddcef45c14f1dfe543947a9eaec..7ef3b67ebbde7b04d9428631ee72e7f45245feb4 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1704,7 +1704,7 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags) return -EBADF; if (unlikely((req->flags & REQ_F_CREDS) && req->creds != current_cred())) - creds = override_creds(req->creds); + creds = override_creds_light(get_new_cred(req->creds)); if (!def->audit_skip) audit_uring_entry(req->opcode); diff --git a/io_uring/sqpoll.c b/io_uring/sqpoll.c index 6df5e649c413e39e36db6cde2a8c6745e533bea9..58a76d5818959a9d7eeef52a8bacd29eba3f3d26 100644 --- a/io_uring/sqpoll.c +++ b/io_uring/sqpoll.c @@ -174,7 +174,7 @@ static int __io_sq_thread(struct io_ring_ctx *ctx, bool cap_entries) const struct cred *creds = NULL; if (ctx->sq_creds != current_cred()) - creds = override_creds(ctx->sq_creds); + creds = override_creds_light(get_new_cred(ctx->sq_creds)); mutex_lock(&ctx->uring_lock); if (!wq_list_empty(&ctx->iopoll_list)) diff --git a/kernel/acct.c b/kernel/acct.c index 179848ad33e978a557ce695a0d6020aa169177c6..8f18eb02dd416b884222b66f0f386379c46b30ea 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -501,7 +501,7 @@ static void do_acct_process(struct bsd_acct_struct *acct) flim = rlimit(RLIMIT_FSIZE); current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY; /* Perform file operations on behalf of whoever enabled accounting */ - orig_cred = override_creds(file->f_cred); + orig_cred = override_creds_light(get_new_cred(file->f_cred)); /* * First check to see if there is enough free_space to continue diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index d9061bd55436b502e065b477a903ed682d722c2e..97329b4fe5027dcc5d80f6b074f4c494c4794df7 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5216,7 +5216,7 @@ static ssize_t __cgroup_procs_write(struct kernfs_open_file *of, char *buf, * permissions using the credentials from file open to protect against * inherited fd attacks. */ - saved_cred = override_creds(of->file->f_cred); + saved_cred = override_creds_light(get_new_cred(of->file->f_cred)); ret = cgroup_attach_permissions(src_cgrp, dst_cgrp, of->file->f_path.dentry->d_sb, threadgroup, ctx->ns); diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index 17bcad8f79de70a29fb58f84ce12ffb929515794..4dd7c45d227e9459e694535cee3f853c09826cff 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1469,7 +1469,7 @@ static int user_event_set_call_visible(struct user_event *user, bool visible) */ cred->fsuid = GLOBAL_ROOT_UID; - old_cred = override_creds(cred); + old_cred = override_creds_light(get_new_cred(cred)); if (visible) ret = trace_add_event_call(&user->call); diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index 82b084cc1cc6349bb532d5ada555b0bcbb1cdbea..a54f5f841cea1edd7f449d4e3e79e37b8ed865f4 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -124,7 +124,7 @@ int dns_query(struct net *net, /* make the upcall, using special credentials to prevent the use of * add_key() to preinstall malicious redirections */ - saved_cred = override_creds(dns_resolver_cache); + saved_cred = override_creds_light(get_new_cred(dns_resolver_cache)); rkey = request_key_net(&key_type_dns_resolver, desc, net, options); revert_creds(saved_cred); kfree(desc);

[v2,01/29] tree-wide: s/override_creds()/override_creds_light(get_new_cred())/g

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