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Message-ID: <201803010105.33CKFRaJ%fengguang.wu@intel.com>
Date: Thu, 1 Mar 2018 01:35:48 +0800
From: kbuild test robot <lkp@...el.com>
To: Mickaël Salaün <mic@...ikod.net>
Cc: kbuild-all@...org, linux-kernel@...r.kernel.org,
Mickaël Salaün <mic@...ikod.net>,
Alexei Starovoitov <ast@...nel.org>,
Andy Lutomirski <luto@...capital.net>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Casey Schaufler <casey@...aufler-ca.com>,
Daniel Borkmann <daniel@...earbox.net>,
David Drysdale <drysdale@...gle.com>,
"David S . Miller" <davem@...emloft.net>,
"Eric W . Biederman" <ebiederm@...ssion.com>,
James Morris <james.l.morris@...cle.com>,
Jann Horn <jann@...jh.net>, Jonathan Corbet <corbet@....net>,
Michael Kerrisk <mtk.manpages@...il.com>,
Kees Cook <keescook@...omium.org>,
Paul Moore <paul@...l-moore.com>,
Sargun Dhillon <sargun@...gun.me>,
"Serge E . Hallyn" <serge@...lyn.com>,
Shuah Khan <shuah@...nel.org>, Tejun Heo <tj@...nel.org>,
Thomas Graf <tgraf@...g.ch>, Tycho Andersen <tycho@...ho.ws>,
Will Drewry <wad@...omium.org>,
kernel-hardening@...ts.openwall.com, linux-api@...r.kernel.org,
linux-security-module@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next v8 06/11] bpf,landlock: Add a new map type: inode
Hi Mickaël,
I love your patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
url: https://github.com/0day-ci/linux/commits/Micka-l-Sala-n/Landlock-LSM-Toward-unprivileged-sandboxing/20180228-233659
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
include/linux/init.h:134:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/init.h:135:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/init.h:268:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/init.h:269:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/printk.h:200:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:32:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:34:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:37:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:38:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:40:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:42:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:43:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:45:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:46:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:49:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/qspinlock.h:53:32: sparse: attribute 'indirect_branch': unknown attribute
include/linux/workqueue.h:646:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/workqueue.h:647:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:34:12: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:35:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:62:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:64:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:173:8: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:174:8: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:174:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:176:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:178:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:180:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/apic.h:254:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/apic.h:430:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/io_apic.h:184:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:113:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:125:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:126:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:110:33: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:112:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:114:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:118:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:126:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/hrtimer.h:497:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/memory_hotplug.h:221:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mmzone.h:1292:15: sparse: attribute 'indirect_branch': unknown attribute
include/linux/kmemleak.h:29:33: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/kasan.h:29:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/kasan.h:30:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/pgtable.h:28:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/slab.h:135:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/slab.h:716:6: sparse: attribute 'indirect_branch': unknown attribute
>> security/landlock/tag.c:127:18: sparse: incompatible types in comparison expression (different address spaces)
security/landlock/tag.c:257:16: sparse: incompatible types in comparison expression (different address spaces)
security/landlock/tag.c:263:24: sparse: incompatible types in comparison expression (different address spaces)
security/landlock/tag.c:357:16: sparse: incompatible types in comparison expression (different address spaces)
--
arch/x86/include/asm/mem_encrypt.h:37:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:38:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:40:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:42:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:43:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:45:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:46:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/mem_encrypt.h:49:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/qspinlock.h:53:32: sparse: attribute 'indirect_branch': unknown attribute
include/linux/workqueue.h:646:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/workqueue.h:647:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/wait_bit.h:41:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:34:12: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:35:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/numa.h:62:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:64:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:173:8: sparse: attribute 'indirect_branch': unknown attribute
include/linux/vmalloc.h:174:8: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:174:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:176:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:178:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/fixmap.h:180:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/apic.h:254:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/apic.h:430:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/io_apic.h:184:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:113:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:125:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/smp.h:126:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:110:33: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:112:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:114:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:118:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/percpu.h:126:12: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:63:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:64:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:65:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:66:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/memory_hotplug.h:221:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mmzone.h:1292:15: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:2422:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:2423:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/fs.h:3330:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/hrtimer.h:497:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/kmemleak.h:29:33: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/kasan.h:29:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/kasan.h:30:6: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/pgtable.h:28:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/slab.h:135:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/slab.h:716:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mm.h:1753:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mm.h:1941:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mm.h:2083:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/mm.h:2671:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/swiotlb.h:39:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/swiotlb.h:124:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/swiotlb.h:9:12: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/swiotlb.h:10:12: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/swiotlb.h:11:13: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/swiotlb.h:12:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/dma-contiguous.h:85:5: sparse: attribute 'indirect_branch': unknown attribute
arch/x86/include/asm/vdso.h:44:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/cred.h:167:13: sparse: attribute 'indirect_branch': unknown attribute
include/linux/nsproxy.h:74:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/io.h:47:6: sparse: attribute 'indirect_branch': unknown attribute
include/linux/netdevice.h:302:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/netdevice.h:4056:5: sparse: attribute 'indirect_branch': unknown attribute
include/linux/ftrace.h:462:6: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:59:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:95:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:120:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:150:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:191:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:231:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:285:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/bpf.h:315:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/xdp.h:28:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/xdp.h:53:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/xdp.h:155:1: sparse: attribute 'indirect_branch': unknown attribute
include/trace/events/xdp.h:190:1: sparse: attribute 'indirect_branch': unknown attribute
kernel/bpf/core.c:1549:31: sparse: incorrect type in return expression (different address spaces) @@ expected struct bpf_prog_array [noderef] <asn:4>* @@ got sn:4>* @@
kernel/bpf/core.c:1549:31: expected struct bpf_prog_array [noderef] <asn:4>*
kernel/bpf/core.c:1549:31: got void *
kernel/bpf/core.c:1553:17: sparse: incorrect type in return expression (different address spaces) @@ expected struct bpf_prog_array [noderef] <asn:4>* @@ got rray [noderef] <asn:4>* @@
kernel/bpf/core.c:1553:17: expected struct bpf_prog_array [noderef] <asn:4>*
kernel/bpf/core.c:1553:17: got struct bpf_prog_array *<noident>
kernel/bpf/core.c:1561:9: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct callback_head *head @@ got struct callback_hstruct callback_head *head @@
kernel/bpf/core.c:1561:9: expected struct callback_head *head
kernel/bpf/core.c:1561:9: got struct callback_head [noderef] <asn:4>*<noident>
kernel/bpf/core.c:1624:34: sparse: incorrect type in initializer (different address spaces) @@ expected struct bpf_prog **prog @@ got struct bpf_prog *struct bpf_prog **prog @@
kernel/bpf/core.c:1624:34: expected struct bpf_prog **prog
kernel/bpf/core.c:1624:34: got struct bpf_prog *[noderef] <asn:4>*<noident>
kernel/bpf/core.c:1647:31: sparse: incorrect type in assignment (different address spaces) @@ expected struct bpf_prog **existing_prog @@ got struct bpf_prog *struct bpf_prog **existing_prog @@
kernel/bpf/core.c:1647:31: expected struct bpf_prog **existing_prog
kernel/bpf/core.c:1647:31: got struct bpf_prog *[noderef] <asn:4>*<noident>
kernel/bpf/core.c:1669:15: sparse: incorrect type in assignment (different address spaces) @@ expected struct bpf_prog_array *array @@ got struct bpf_prog_astruct bpf_prog_array *array @@
kernel/bpf/core.c:1669:15: expected struct bpf_prog_array *array
kernel/bpf/core.c:1669:15: got struct bpf_prog_array [noderef] <asn:4>*
kernel/bpf/core.c:1675:31: sparse: incorrect type in assignment (different address spaces) @@ expected struct bpf_prog **[assigned] existing_prog @@ got structstruct bpf_prog **[assigned] existing_prog @@
kernel/bpf/core.c:1675:31: expected struct bpf_prog **[assigned] existing_prog
kernel/bpf/core.c:1675:31: got struct bpf_prog *[noderef] <asn:4>*<noident>
include/trace/events/bpf.h:59:1: sparse: Using plain integer as NULL pointer
include/trace/events/bpf.h:95:1: sparse: Using plain integer as NULL pointer
include/trace/events/bpf.h:120:1: sparse: Using plain integer as NULL pointer
include/trace/events/bpf.h:191:1: sparse: Using plain integer as NULL pointer
include/trace/events/bpf.h:231:1: sparse: Using plain integer as NULL pointer
include/trace/events/bpf.h:285:1: sparse: too many warnings
vim +127 security/landlock/tag.c
116
117 /* return true if the tag_root is queued for freeing, false otherwise */
118 static void put_tag_root(struct landlock_tag_root **root,
119 spinlock_t *root_lock)
120 {
121 struct landlock_tag_root *freeme;
122
123 if (!root || WARN_ON(!root_lock))
124 return;
125
126 rcu_read_lock();
> 127 freeme = rcu_dereference(*root);
128 if (WARN_ON(!freeme))
129 goto out_rcu;
130 if (!refcount_dec_and_lock(&freeme->tag_nb, root_lock))
131 goto out_rcu;
132
133 rcu_assign_pointer(*root, NULL);
134 spin_unlock(root_lock);
135 call_rcu(&freeme->rcu_put, put_tag_root_rcu);
136
137 out_rcu:
138 rcu_read_unlock();
139 }
140
---
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