Re: [PATCH v4 3/7] crash_dump: store dm keys in kdump reserved memory
From: Coiby Xu
Date: Fri Jun 07 2024 - 08:30:04 EST
On Tue, Jun 04, 2024 at 09:54:26PM +0800, Baoquan He wrote:
Hi Coiby,
Hi Baoquan,
On 05/24/24 at 11:17am, kernel test robot wrote:
Hi Coiby,
kernel test robot noticed the following build errors:
[auto build test ERROR on de7e71ef8bed222dd144d8878091ecb6d5dfd208]
url: https://github.com/intel-lab-lkp/linux/commits/Coiby-Xu/kexec_file-allow-to-place-kexec_buf-randomly/20240523-130727
base: de7e71ef8bed222dd144d8878091ecb6d5dfd208
patch link: https://lore.kernel.org/r/20240523050451.788754-4-coxu%40redhat.com
patch subject: [PATCH v4 3/7] crash_dump: store dm keys in kdump reserved memory
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20240524/202405241012.KlmCbp77-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240524/202405241012.KlmCbp77-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405241012.KlmCbp77-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
Please respond to lkp report sooner, otherwise the reproducer link could
be unavailable.
Thanks for the reminder! I believe these errors are false positives
because 1) include/linux/kexec.h is included after "#include <linux/crash_dump.h>"
and 2) similar errors are seen for kernel/kexec_file.c by
"make ARCH=arm CROSS_COMPILE=arm-linux-gnu- kernel/kexec_file.o"
kernel/crash_dump_dm_crypt.c: In function 'crash_load_dm_crypt_keys':
>> kernel/crash_dump_dm_crypt.c:158:16: error: variable 'kbuf' has initializer but incomplete type
158 | struct kexec_buf kbuf = {
| ^~~~~~~~~
>> kernel/crash_dump_dm_crypt.c:159:18: error: 'struct kexec_buf' has no member named 'image'
159 | .image = image,
| ^~~~~
kernel/crash_dump_dm_crypt.c:159:26: warning: excess elements in struct initializer
159 | .image = image,
| ^~~~~
kernel/crash_dump_dm_crypt.c:159:26: note: (near initialization for 'kbuf')
>> kernel/crash_dump_dm_crypt.c:160:18: error: 'struct kexec_buf' has no member named 'buf_min'
160 | .buf_min = 0,
| ^~~~~~~
kernel/crash_dump_dm_crypt.c:160:28: warning: excess elements in struct initializer
160 | .buf_min = 0,
| ^
kernel/crash_dump_dm_crypt.c:160:28: note: (near initialization for 'kbuf')
>> kernel/crash_dump_dm_crypt.c:161:18: error: 'struct kexec_buf' has no member named 'buf_max'
161 | .buf_max = ULONG_MAX,
| ^~~~~~~
In file included from include/linux/limits.h:7,
from include/linux/thread_info.h:12,
from include/asm-generic/preempt.h:5,
from ./arch/arm/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:79,
from include/linux/rcupdate.h:27,
from include/linux/rbtree.h:24,
from include/linux/key.h:15,
from kernel/crash_dump_dm_crypt.c:2:
include/vdso/limits.h:13:25: warning: excess elements in struct initializer
13 | #define ULONG_MAX (~0UL)
| ^
kernel/crash_dump_dm_crypt.c:161:28: note: in expansion of macro 'ULONG_MAX'
161 | .buf_max = ULONG_MAX,
| ^~~~~~~~~
include/vdso/limits.h:13:25: note: (near initialization for 'kbuf')
13 | #define ULONG_MAX (~0UL)
| ^
kernel/crash_dump_dm_crypt.c:161:28: note: in expansion of macro 'ULONG_MAX'
161 | .buf_max = ULONG_MAX,
| ^~~~~~~~~
>> kernel/crash_dump_dm_crypt.c:162:18: error: 'struct kexec_buf' has no member named 'top_down'
162 | .top_down = false,
| ^~~~~~~~
kernel/crash_dump_dm_crypt.c:162:29: warning: excess elements in struct initializer
162 | .top_down = false,
| ^~~~~
kernel/crash_dump_dm_crypt.c:162:29: note: (near initialization for 'kbuf')
>> kernel/crash_dump_dm_crypt.c:163:18: error: 'struct kexec_buf' has no member named 'random'
163 | .random = true,
| ^~~~~~
kernel/crash_dump_dm_crypt.c:163:27: warning: excess elements in struct initializer
163 | .random = true,
| ^~~~
kernel/crash_dump_dm_crypt.c:163:27: note: (near initialization for 'kbuf')
>> kernel/crash_dump_dm_crypt.c:158:26: error: storage size of 'kbuf' isn't known
158 | struct kexec_buf kbuf = {
| ^~~~
>> kernel/crash_dump_dm_crypt.c:187:20: error: 'KEXEC_BUF_MEM_UNKNOWN' undeclared (first use in this function)
187 | kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
| ^~~~~~~~~~~~~~~~~~~~~
kernel/crash_dump_dm_crypt.c:187:20: note: each undeclared identifier is reported only once for each function it appears in
>> kernel/crash_dump_dm_crypt.c:188:13: error: implicit declaration of function 'kexec_add_buffer' [-Werror=implicit-function-declaration]
188 | r = kexec_add_buffer(&kbuf);
| ^~~~~~~~~~~~~~~~
kernel/crash_dump_dm_crypt.c:158:26: warning: unused variable 'kbuf' [-Wunused-variable]
158 | struct kexec_buf kbuf = {
| ^~~~
cc1: some warnings being treated as errors
vim +/kbuf +158 kernel/crash_dump_dm_crypt.c
155
156 int crash_load_dm_crypt_keys(struct kimage *image)
157 {
> 158 struct kexec_buf kbuf = {
> 159 .image = image,
> 160 .buf_min = 0,
> 161 .buf_max = ULONG_MAX,
> 162 .top_down = false,
> 163 .random = true,
164 };
165
166 int r;
167
168 if (state == FRESH)
169 return 0;
170
171 if (key_count != keys_header->key_count) {
172 pr_err("Only record %u keys (%u in total)\n", key_count,
173 keys_header->key_count);
174 return -EINVAL;
175 }
176
177 image->dm_crypt_keys_addr = 0;
178 r = build_keys_header();
179 if (r)
180 return r;
181
182 kbuf.buffer = keys_header;
183 kbuf.bufsz = keys_header_size;
184
185 kbuf.memsz = kbuf.bufsz;
186 kbuf.buf_align = ELF_CORE_HEADER_ALIGN;
> 187 kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
> 188 r = kexec_add_buffer(&kbuf);
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
--
Best regards,
Coiby