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Date: Fri, 13 Jul 2018 21:26:51 +0800
From: kbuild test robot <lkp@...el.com>
To: Florian Westphal <fw@...len.de>
Cc: kbuild-all@...org, netfilter-devel@...r.kernel.org,
netdev@...r.kernel.org, arnd@...db.de,
Florian Westphal <fw@...len.de>
Subject: Re: [PATCH nf-next 1/2] ipv6: remove dependency of nf_defrag_ipv6 on
ipv6 module
Hi Florian,
I love your patch! Perhaps something to improve:
[auto build test WARNING on nf-next/master]
url: https://github.com/0day-ci/linux/commits/Florian-Westphal/ipv6-remove-dependency-of-nf_defrag_ipv6-on-ipv6-module/20180713-064909
base: https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-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 >>)
>> net/ieee802154/6lowpan/reassembly.c:57:14: sparse: unknown member
>> net/ieee802154/6lowpan/reassembly.c:57:14: sparse: cast from unknown type
net/ieee802154/6lowpan/reassembly.c:58:15: sparse: using member 'q' in incomplete struct frag_queue
net/ieee802154/6lowpan/reassembly.c:58:15: sparse: cast from unknown type
net/ieee802154/6lowpan/reassembly.c:60:22: sparse: using member 'q' in incomplete struct frag_queue
net/ieee802154/6lowpan/reassembly.c:62:15: sparse: using member 'q' in incomplete struct frag_queue
net/ieee802154/6lowpan/reassembly.c:65:27: sparse: using member 'q' in incomplete struct frag_queue
net/ieee802154/6lowpan/reassembly.c:67:24: sparse: using member 'q' in incomplete struct frag_queue
net/ieee802154/6lowpan/reassembly.c:68:26: sparse: using member 'q' in incomplete struct frag_queue
>> net/ieee802154/6lowpan/reassembly.c:57:14: sparse: unknown expression (30 46)
net/ieee802154/6lowpan/reassembly.c:58:15: sparse: unknown expression (8 46)
>> net/ieee802154/6lowpan/reassembly.c:60:18: sparse: call with no type!
net/ieee802154/6lowpan/reassembly.c:62:18: sparse: unknown expression (8 46)
net/ieee802154/6lowpan/reassembly.c:65:23: sparse: call with no type!
net/ieee802154/6lowpan/reassembly.c:67:20: sparse: call with no type!
net/ieee802154/6lowpan/reassembly.c:68:22: sparse: call with no type!
In file included from include/linux/kernel.h:10:0,
from include/linux/list.h:9,
from include/linux/random.h:10,
from include/linux/net.h:22,
from net/ieee802154/6lowpan/reassembly.c:17:
net/ieee802154/6lowpan/reassembly.c: In function 'lowpan_frag_expire':
include/linux/kernel.h:964:51: error: dereferencing pointer to incomplete type 'struct frag_queue'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && 25- ^
include/linux/compiler.h:316:19: note: in definition of macro '__compiletime_assert'
bool __cond = !(condition); 28- ^~~~~~~~~
include/linux/compiler.h:339:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/kernel.h:964:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && 37- ^~~~~~~~~~~~~~~~
include/linux/kernel.h:964:20: note: in expansion of macro '__same_type'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && 40- ^~~~~~~~~~~
net/ieee802154/6lowpan/reassembly.c:57:7: note: in expansion of macro 'container_of'
fq = container_of(frag, struct frag_queue, q);
^~~~~~~~~~~~
In file included from include/linux/compiler_types.h:58:0,
from <command-line>:0:
include/linux/compiler-gcc.h:170:2: error: invalid use of undefined type 'struct frag_queue'
__builtin_offsetof(a, b)
^
include/linux/stddef.h:17:32: note: in expansion of macro '__compiler_offsetof'
#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
^~~~~~~~~~~~~~~~~~~
include/linux/kernel.h:967:21: note: in expansion of macro 'offsetof'
((type *)(__mptr - offsetof(type, member))); })
^~~~~~~~
net/ieee802154/6lowpan/reassembly.c:57:7: note: in expansion of macro 'container_of'
fq = container_of(frag, struct frag_queue, q);
^~~~~~~~~~~~
net/ieee802154/6lowpan/reassembly.c: In function 'lowpan_net_frag_init':
net/ieee802154/6lowpan/reassembly.c:611:30: error: invalid application of 'sizeof' to incomplete type 'struct frag_queue'
lowpan_frags.qsize = sizeof(struct frag_queue);
^~~~~~
vim +57 net/ieee802154/6lowpan/reassembly.c
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 50
78802011f net/ieee802154/6lowpan/reassembly.c Kees Cook 2017-10-16 51 static void lowpan_frag_expire(struct timer_list *t)
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 52 {
78802011f net/ieee802154/6lowpan/reassembly.c Kees Cook 2017-10-16 53 struct inet_frag_queue *frag = from_timer(frag, t, timer);
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 54 struct frag_queue *fq;
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 55 struct net *net;
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 56
78802011f net/ieee802154/6lowpan/reassembly.c Kees Cook 2017-10-16 @57 fq = container_of(frag, struct frag_queue, q);
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 @58 net = container_of(fq->q.net, struct net, ieee802154_lowpan.frags);
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 59
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 @60 spin_lock(&fq->q.lock);
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 61
06aa8b8a0 net/ieee802154/reassembly.c Nikolay Aleksandrov 2014-08-01 62 if (fq->q.flags & INET_FRAG_COMPLETE)
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 63 goto out;
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 64
093ba7291 net/ieee802154/6lowpan/reassembly.c Eric Dumazet 2018-03-31 65 inet_frag_kill(&fq->q);
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 66 out:
177943260 net/ieee802154/reassembly.c Florian Westphal 2014-03-13 67 spin_unlock(&fq->q.lock);
093ba7291 net/ieee802154/6lowpan/reassembly.c Eric Dumazet 2018-03-31 68 inet_frag_put(&fq->q);
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 69 }
7240cdec6 net/ieee802154/reassembly.c Alexander Aring 2014-02-28 70
:::::: The code at line 57 was first introduced by commit
:::::: 78802011fbe34331bdef6f2dfb1634011f0e4c32 inet: frags: Convert timers to use timer_setup()
:::::: TO: Kees Cook <keescook@...omium.org>
:::::: CC: David S. Miller <davem@...emloft.net>
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