Re: [Crash-utility] kmem -s/-S not working properly on RHEL8.6/8.7

Hello Lianbo, > The number of instructions disassembled by gdb is: spn->value - sp->value, which is much more than actually needed. > Can you please replace it with this one? > + sprintf(buf1, "disassemble 0x%lx, 0x%lx", sp->value, spn->value); What about just doing "disassemble __slab_free":

+ * With CONFIG_SLAB_FREELIST_HARDENED, freelist_ptr's are crypted with xor's, + * and for recent release with an additionnal bswap. Some releases prio to 5.7.0 + * may be using the additionnal bswap. The only easy and reliable way to tell is + * to inspect assembly code (eg. "__slab_free") for a bswap instruction. + */ +static int +freelist_ptr_bswap_x86(void) +{ + char buf1[BUFSIZE]; + char buf2[BUFSIZE]; + char *arglist[MAXARGS]; + int found; + sprintf(buf1, "disassemble __slab_free"); + open_tmpfile(); + gdb_pass_through(buf1, pc->tmpfile, GNU_RETURN_ON_ERROR);

+ rewind(pc->tmpfile); + found = FALSE; + while (fgets(buf2, BUFSIZE, pc->tmpfile)) { + if (parse_line(buf2, arglist) < 3) + continue; + if (STREQ(arglist[2], "bswap")) { + found = TRUE; + //break;

+ } + close_tmpfile(); + return found; +} Thanks, Georges