* [PATCH] mm/memblock.c: fix NULL dereference error
@ 2016-08-02 5:03 zijun_hu
2016-08-02 5:20 ` zijun_hu
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: zijun_hu @ 2016-08-02 5:03 UTC (permalink / raw)
To: akpm
Cc: ard.biesheuvel, david, dev, kuleshovmail, tangchen, tj, weiyang,
mm-commits, linux-kernel, linux-mm, torvalds
[-- Attachment #1: Type: text/plain, Size: 253 bytes --]
Hi Andrew,
this patch is part of https://lkml.org/lkml/2016/7/26/347 and isn't merged in
as you advised in another mail, i release this patch against linus's mainline
for fixing relevant bugs completely, see test patch attached for verification
details
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mm/memblock.c: fix NULL dereference error
2016-08-02 5:03 [PATCH] mm/memblock.c: fix NULL dereference error zijun_hu
@ 2016-08-02 5:20 ` zijun_hu
2016-08-02 5:23 ` kbuild test robot
2016-08-02 5:39 ` zijun_hu
2 siblings, 0 replies; 5+ messages in thread
From: zijun_hu @ 2016-08-02 5:20 UTC (permalink / raw)
Cc: zijun_hu, kuleshovmail, tangchen, tj, weiyang, mm-commits,
linux-kernel, linux-mm, torvalds
On 08/02/2016 01:03 PM, zijun_hu wrote:
> Hi Andrew,
>
> this patch is part of https://lkml.org/lkml/2016/7/26/347 and isn't merged in
> as you advised in another mail, i release this patch against linus's mainline
> for fixing relevant bugs completely, see test patch attached for verification
> details
>
>>From 5a74cb46b7754a45428ff95f4653ad27025c3131 Mon Sep 17 00:00:00 2001
> From: zijun_hu <zijun_hu@htc.com>
> Date: Tue, 2 Aug 2016 12:35:28 +0800
> Subject: [PATCH] mm/memblock.c: fix NULL dereference error
>
> it causes NULL dereference error and failure to get type_a->regions[0] info
> if parameter type_b of __next_mem_range_rev() == NULL
>
> the bugs are fixed by checking before dereferring and initializing idx_b
> to 0
>
> the approach is tested by dumping all types of region via __memblock_dump_all()
> and __next_mem_range_rev() fixed to UART separately, the result is okay after
> checking the logs
>
> Signed-off-by: zijun_hu <zijun_hu@htc.com>
> Tested-by: zijun_hu <zijun_hu@htc.com>
> Acked-by: Tejun Heo <tj@kernel.org>
> ---
> mm/memblock.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/mm/memblock.c b/mm/memblock.c
> index ff5ff3b..250dd48 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -994,7 +994,10 @@ void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags,
>
> if (*idx == (u64)ULLONG_MAX) {
> idx_a = type_a->cnt - 1;
> - idx_b = type_b->cnt;
> + if (type_b != NULL)
> + idx_b = type_b->cnt;
> + else
> + idx_b = 0;
> }
>
> for (; idx_a >= 0; idx_a--) {
>
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* Re: [PATCH] mm/memblock.c: fix NULL dereference error
2016-08-02 5:03 [PATCH] mm/memblock.c: fix NULL dereference error zijun_hu
2016-08-02 5:20 ` zijun_hu
@ 2016-08-02 5:23 ` kbuild test robot
2016-08-02 5:32 ` zijun_hu
2016-08-02 5:39 ` zijun_hu
2 siblings, 1 reply; 5+ messages in thread
From: kbuild test robot @ 2016-08-02 5:23 UTC (permalink / raw)
To: zijun_hu
Cc: kbuild-all, akpm, ard.biesheuvel, david, dev, kuleshovmail,
tangchen, tj, weiyang, mm-commits, linux-kernel, linux-mm,
torvalds
[-- Attachment #1: Type: text/plain, Size: 4892 bytes --]
Hi zijun_hu,
[auto build test WARNING on mmotm/master]
[also build test WARNING on v4.7 next-20160801]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/zijun_hu/mm-memblock-c-fix-NULL-dereference-error/20160802-130708
base: git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x009-201631 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from include/linux/kernel.h:13:0,
from mm/memblock.c:13:
mm/memblock.c: In function 'memblock_patch_verify':
>> mm/memblock.c:1713:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
>> mm/memblock.c:1713:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
mm/memblock.c:1713:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
>> mm/memblock.c:1713:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
mm/memblock.c:1719:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
mm/memblock.c:1719:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
mm/memblock.c:1719:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
mm/memblock.c:1719:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
mm/memblock.c:1726:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
mm/memblock.c:1726:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
mm/memblock.c:1726:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^
include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
#define pr_fmt(fmt) fmt
^~~
mm/memblock.c:1726:3: note: in expansion of macro 'pr_info'
pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
^~~~~~~
vim +1713 mm/memblock.c
1697 pr_info(" memory size = %#llx reserved size = %#llx\n",
1698 (unsigned long long)memblock.memory.total_size,
1699 (unsigned long long)memblock.reserved.total_size);
1700
1701 memblock_dump(&memblock.memory, "memory");
1702 memblock_dump(&memblock.reserved, "reserved");
1703 }
1704
1705 void __init_memblock memblock_patch_verify(void)
1706 {
1707 u64 i;
1708 phys_addr_t this_start, this_end;
1709
1710 pr_info("in %s: memory\n", __func__);
1711 for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE,
1712 MEMBLOCK_NONE, &this_start, &this_end, NULL)
> 1713 pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
1714 i, this_start, this_end);
1715
1716 pr_info("in %s: reserved\n", __func__);
1717 for_each_mem_range_rev(i, &memblock.reserved, NULL, NUMA_NO_NODE,
1718 MEMBLOCK_NONE, &this_start, &this_end, NULL)
1719 pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
1720 i, this_start, this_end);
1721
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 24821 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mm/memblock.c: fix NULL dereference error
2016-08-02 5:23 ` kbuild test robot
@ 2016-08-02 5:32 ` zijun_hu
0 siblings, 0 replies; 5+ messages in thread
From: zijun_hu @ 2016-08-02 5:32 UTC (permalink / raw)
To: kbuild test robot
Cc: kbuild-all, akpm, ard.biesheuvel, david, dev, kuleshovmail,
tangchen, tj, weiyang, mm-commits, linux-kernel, linux-mm,
torvalds
i am sorry, the second patch is only a test patch, please don't apply it
i will send another mail for correct this
On 08/02/2016 01:23 PM, kbuild test robot wrote:
> Hi zijun_hu,
>
> [auto build test WARNING on mmotm/master]
> [also build test WARNING on v4.7 next-20160801]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/zijun_hu/mm-memblock-c-fix-NULL-dereference-error/20160802-130708
> base: git://git.cmpxchg.org/linux-mmotm.git master
> config: i386-randconfig-x009-201631 (attached as .config)
> compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
> # save the attached .config to linux build tree
> make ARCH=i386
>
> All warnings (new ones prefixed by >>):
>
> In file included from include/linux/kernel.h:13:0,
> from mm/memblock.c:13:
> mm/memblock.c: In function 'memblock_patch_verify':
>>> mm/memblock.c:1713:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
>>> mm/memblock.c:1713:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
> mm/memblock.c:1713:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
>>> mm/memblock.c:1713:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
> mm/memblock.c:1719:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
> mm/memblock.c:1719:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
> mm/memblock.c:1719:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
> mm/memblock.c:1719:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
> mm/memblock.c:1726:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
> mm/memblock.c:1726:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
> mm/memblock.c:1726:11: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'phys_addr_t {aka unsigned int}' [-Wformat=]
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^
> include/linux/printk.h:260:21: note: in definition of macro 'pr_fmt'
> #define pr_fmt(fmt) fmt
> ^~~
> mm/memblock.c:1726:3: note: in expansion of macro 'pr_info'
> pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> ^~~~~~~
>
> vim +1713 mm/memblock.c
>
> 1697 pr_info(" memory size = %#llx reserved size = %#llx\n",
> 1698 (unsigned long long)memblock.memory.total_size,
> 1699 (unsigned long long)memblock.reserved.total_size);
> 1700
> 1701 memblock_dump(&memblock.memory, "memory");
> 1702 memblock_dump(&memblock.reserved, "reserved");
> 1703 }
> 1704
> 1705 void __init_memblock memblock_patch_verify(void)
> 1706 {
> 1707 u64 i;
> 1708 phys_addr_t this_start, this_end;
> 1709
> 1710 pr_info("in %s: memory\n", __func__);
> 1711 for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE,
> 1712 MEMBLOCK_NONE, &this_start, &this_end, NULL)
>> 1713 pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> 1714 i, this_start, this_end);
> 1715
> 1716 pr_info("in %s: reserved\n", __func__);
> 1717 for_each_mem_range_rev(i, &memblock.reserved, NULL, NUMA_NO_NODE,
> 1718 MEMBLOCK_NONE, &this_start, &this_end, NULL)
> 1719 pr_info("[%#016llx]\t[%#016llx-%#016llx]\n",
> 1720 i, this_start, this_end);
> 1721
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mm/memblock.c: fix NULL dereference error
2016-08-02 5:03 [PATCH] mm/memblock.c: fix NULL dereference error zijun_hu
2016-08-02 5:20 ` zijun_hu
2016-08-02 5:23 ` kbuild test robot
@ 2016-08-02 5:39 ` zijun_hu
2 siblings, 0 replies; 5+ messages in thread
From: zijun_hu @ 2016-08-02 5:39 UTC (permalink / raw)
To: akpm
Cc: ard.biesheuvel, david, dev, kuleshovmail, tangchen, tj, weiyang,
mm-commits, linux-kernel, linux-mm, torvalds
Hi All,
this mail correct the following mistakes in last mail
1, remove test patch attached
2, format patch to satisfy rules
i am so sorry for my mistake
Hi Andrew,
this patch is part of https://lkml.org/lkml/2016/7/26/347 and isn't merged in
as you advised in another mail, i release this patch against linus's mainline
for fixing relevant bugs completely
^ permalink raw reply [flat|nested] 5+ messages in thread
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2016-08-02 5:03 [PATCH] mm/memblock.c: fix NULL dereference error zijun_hu
2016-08-02 5:20 ` zijun_hu
2016-08-02 5:23 ` kbuild test robot
2016-08-02 5:32 ` zijun_hu
2016-08-02 5:39 ` zijun_hu
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