[Crash-utility] [PATCH 5/5] zram: fix failure invalid structure member offset: zram_table_flag

On vmcore of the kernel version 4.18.0-147.5.1.el8_1.x86_64, there is the following error when trying to read the user-space memory that is swapped out into some zram device: crash> rd -u 0x00007f9b88bea000 rd: invalid structure member offset: zram_table_flag FILE: diskdump.c LINE: 2784 FUNCTION: try_zram_decompress() [./crash] error trace: 47aaa2 => 571900 => 53a3f1 => 53a373 53a373: OFFSET_verify.part.27+51 53a3f1: OFFSET_verify+49 571900: try_zram_decompress+1808 47aaa2: readmem+2562 rd: invalid structure member offset: zram_table_flag FILE: diskdump.c LINE: 2784 FUNCTION: try_zram_decompress() This message means that there is no flags member in zram_table_entry structure. The flags member is renamed from the former value by the following commit for refactoring: 7e5292831b346bacb05558ca385cae366187314c zram: refactor flags and writeback stuff Let's initialize offset_table.zram_table_flags by value member as well. --- diskdump.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/diskdump.c b/diskdump.c index 65f43ff..63a08a1 100644 --- a/diskdump.c +++ b/diskdump.c @@ -2592,6 +2592,8 @@ zram_init(void) MEMBER_OFFSET_INIT(zram_mempoll, "zram", "mem_pool"); MEMBER_OFFSET_INIT(zram_compressor, "zram", "compressor"); MEMBER_OFFSET_INIT(zram_table_flag, "zram_table_entry", "flags"); + if (INVALID_MEMBER(zram_table_flag)) + MEMBER_OFFSET_INIT(zram_table_flag, "zram_table_entry", "value"); STRUCT_SIZE_INIT(zram_table_entry, "zram_table_entry"); } -- 1.8.3.1