* [linux-next:master 5040/8423] net/ipv4/ip_sockglue.c:838:7: warning: taking address of packed member 'gf_group' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value
@ 2021-08-16 8:17 ` kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-08-16 8:17 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: clang-built-linux, kbuild-all, Linux Memory Management List
[-- Attachment #1: Type: text/plain, Size: 11554 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: b9011c7e671dbbf59bb753283ddfd03f0c9eb865
commit: db243b796439c0caba47865564d8acd18a301d18 [5040/8423] net/ipv4/ipv6: Replace one-element arraya with flexible-array members
config: i386-randconfig-r023-20210816 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=db243b796439c0caba47865564d8acd18a301d18
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout db243b796439c0caba47865564d8acd18a301d18
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
clang-14: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument]
In file included from net/ipv4/ip_sockglue.c:19:
In file included from include/linux/module.h:14:
In file included from include/linux/buildid.h:5:
In file included from include/linux/mm_types.h:9:
In file included from include/linux/spinlock.h:51:
In file included from include/linux/preempt.h:78:
In file included from arch/x86/include/asm/preempt.h:7:
In file included from include/linux/thread_info.h:60:
arch/x86/include/asm/thread_info.h:172:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
oldframe = __builtin_frame_address(1);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/thread_info.h:174:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
frame = __builtin_frame_address(2);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/ipv4/ip_sockglue.c:838:7: warning: taking address of packed member 'gf_group' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
&gf32->gf_group, gf32->gf_slist_flex);
^~~~~~~~~~~~~~
>> net/ipv4/ip_sockglue.c:1509:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv4/ip_sockglue.c:1509:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
>> net/ipv4/ip_sockglue.c:1510:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv4/ip_sockglue.c:1510:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
7 warnings generated.
--
clang-14: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument]
In file included from net/ipv6/ipv6_sockglue.c:21:
In file included from include/linux/module.h:14:
In file included from include/linux/buildid.h:5:
In file included from include/linux/mm_types.h:9:
In file included from include/linux/spinlock.h:51:
In file included from include/linux/preempt.h:78:
In file included from arch/x86/include/asm/preempt.h:7:
In file included from include/linux/thread_info.h:60:
arch/x86/include/asm/thread_info.h:172:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
oldframe = __builtin_frame_address(1);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/thread_info.h:174:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
frame = __builtin_frame_address(2);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/ipv6/ipv6_sockglue.c:1111:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv6/ipv6_sockglue.c:1111:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
>> net/ipv6/ipv6_sockglue.c:1112:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv6/ipv6_sockglue.c:1112:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
6 warnings generated.
vim +838 net/ipv4/ip_sockglue.c
799
800 static int compat_ip_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
801 int optlen)
802 {
803 const int size0 = offsetof(struct compat_group_filter, gf_slist_flex);
804 struct compat_group_filter *gf32;
805 unsigned int n;
806 void *p;
807 int err;
808
809 if (optlen < size0)
810 return -EINVAL;
811 if (optlen > sysctl_optmem_max - 4)
812 return -ENOBUFS;
813
814 p = kmalloc(optlen + 4, GFP_KERNEL);
815 if (!p)
816 return -ENOMEM;
817 gf32 = p + 4; /* we want ->gf_group and ->gf_slist_flex aligned */
818
819 err = -EFAULT;
820 if (copy_from_sockptr(gf32, optval, optlen))
821 goto out_free_gsf;
822
823 /* numsrc >= (4G-140)/128 overflow in 32 bits */
824 n = gf32->gf_numsrc;
825 err = -ENOBUFS;
826 if (n >= 0x1ffffff)
827 goto out_free_gsf;
828
829 err = -EINVAL;
830 if (offsetof(struct compat_group_filter, gf_slist_flex[n]) > optlen)
831 goto out_free_gsf;
832
833 /* numsrc >= (4G-140)/128 overflow in 32 bits */
834 err = -ENOBUFS;
835 if (n > sock_net(sk)->ipv4.sysctl_igmp_max_msf)
836 goto out_free_gsf;
837 err = set_mcast_msfilter(sk, gf32->gf_interface, n, gf32->gf_fmode,
> 838 &gf32->gf_group, gf32->gf_slist_flex);
839 out_free_gsf:
840 kfree(p);
841 return err;
842 }
843
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 37832 bytes --]
^ permalink raw reply [flat|nested] 2+ messages in thread
* [linux-next:master 5040/8423] net/ipv4/ip_sockglue.c:838:7: warning: taking address of packed member 'gf_group' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value
@ 2021-08-16 8:17 ` kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-08-16 8:17 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 11737 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: b9011c7e671dbbf59bb753283ddfd03f0c9eb865
commit: db243b796439c0caba47865564d8acd18a301d18 [5040/8423] net/ipv4/ipv6: Replace one-element arraya with flexible-array members
config: i386-randconfig-r023-20210816 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=db243b796439c0caba47865564d8acd18a301d18
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout db243b796439c0caba47865564d8acd18a301d18
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
clang-14: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument]
In file included from net/ipv4/ip_sockglue.c:19:
In file included from include/linux/module.h:14:
In file included from include/linux/buildid.h:5:
In file included from include/linux/mm_types.h:9:
In file included from include/linux/spinlock.h:51:
In file included from include/linux/preempt.h:78:
In file included from arch/x86/include/asm/preempt.h:7:
In file included from include/linux/thread_info.h:60:
arch/x86/include/asm/thread_info.h:172:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
oldframe = __builtin_frame_address(1);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/thread_info.h:174:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
frame = __builtin_frame_address(2);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/ipv4/ip_sockglue.c:838:7: warning: taking address of packed member 'gf_group' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
&gf32->gf_group, gf32->gf_slist_flex);
^~~~~~~~~~~~~~
>> net/ipv4/ip_sockglue.c:1509:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv4/ip_sockglue.c:1509:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
>> net/ipv4/ip_sockglue.c:1510:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv4/ip_sockglue.c:1510:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
7 warnings generated.
--
clang-14: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument]
In file included from net/ipv6/ipv6_sockglue.c:21:
In file included from include/linux/module.h:14:
In file included from include/linux/buildid.h:5:
In file included from include/linux/mm_types.h:9:
In file included from include/linux/spinlock.h:51:
In file included from include/linux/preempt.h:78:
In file included from arch/x86/include/asm/preempt.h:7:
In file included from include/linux/thread_info.h:60:
arch/x86/include/asm/thread_info.h:172:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
oldframe = __builtin_frame_address(1);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/include/asm/thread_info.h:174:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
frame = __builtin_frame_address(2);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> net/ipv6/ipv6_sockglue.c:1111:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv6/ipv6_sockglue.c:1111:29: warning: taking address of packed member 'gf_fmode' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_fmode, &p->gf_fmode) ||
^~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
>> net/ipv6/ipv6_sockglue.c:1112:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:221:24: note: expanded from macro 'do_put_user_call'
register __typeof__(*(ptr)) __val_pu asm("%"_ASM_AX); \
^~~
>> net/ipv6/ipv6_sockglue.c:1112:30: warning: taking address of packed member 'gf_numsrc' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value [-Waddress-of-packed-member]
put_user(gf.gf_numsrc, &p->gf_numsrc))
^~~~~~~~~~~~
arch/x86/include/asm/uaccess.h:252:72: note: expanded from macro 'put_user'
#define put_user(x, ptr) ({ might_fault(); do_put_user_call(put_user,x,ptr); })
^~~
arch/x86/include/asm/uaccess.h:230:31: note: expanded from macro 'do_put_user_call'
[size] "i" (sizeof(*(ptr))) \
^~~
6 warnings generated.
vim +838 net/ipv4/ip_sockglue.c
799
800 static int compat_ip_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
801 int optlen)
802 {
803 const int size0 = offsetof(struct compat_group_filter, gf_slist_flex);
804 struct compat_group_filter *gf32;
805 unsigned int n;
806 void *p;
807 int err;
808
809 if (optlen < size0)
810 return -EINVAL;
811 if (optlen > sysctl_optmem_max - 4)
812 return -ENOBUFS;
813
814 p = kmalloc(optlen + 4, GFP_KERNEL);
815 if (!p)
816 return -ENOMEM;
817 gf32 = p + 4; /* we want ->gf_group and ->gf_slist_flex aligned */
818
819 err = -EFAULT;
820 if (copy_from_sockptr(gf32, optval, optlen))
821 goto out_free_gsf;
822
823 /* numsrc >= (4G-140)/128 overflow in 32 bits */
824 n = gf32->gf_numsrc;
825 err = -ENOBUFS;
826 if (n >= 0x1ffffff)
827 goto out_free_gsf;
828
829 err = -EINVAL;
830 if (offsetof(struct compat_group_filter, gf_slist_flex[n]) > optlen)
831 goto out_free_gsf;
832
833 /* numsrc >= (4G-140)/128 overflow in 32 bits */
834 err = -ENOBUFS;
835 if (n > sock_net(sk)->ipv4.sysctl_igmp_max_msf)
836 goto out_free_gsf;
837 err = set_mcast_msfilter(sk, gf32->gf_interface, n, gf32->gf_fmode,
> 838 &gf32->gf_group, gf32->gf_slist_flex);
839 out_free_gsf:
840 kfree(p);
841 return err;
842 }
843
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 37832 bytes --]
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2021-08-16 8:17 [linux-next:master 5040/8423] net/ipv4/ip_sockglue.c:838:7: warning: taking address of packed member 'gf_group' of class or structure 'compat_group_filter::(anonymous union)::(anonymous)' may result in an unaligned pointer value kernel test robot
2021-08-16 8:17 ` kernel test robot
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