Re: [PATCH v4 3/7] crash_dump: store dm keys in kdump reserved memory

From: Baoquan He
Date: Tue Jun 04 2024 - 10:15:36 EST

Hi Coiby,

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.

>
> 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
>