Re: [Crash-utility] crash-4.0-2.30 broken on 2.6.17-rc6-mm2 ?

Jun'ichi Nomura wrote: > Hi, > > Dave Anderson wrote: > >> static inline struct new_utsname *utsname(void) > >> { > >> return &current->nsproxy->uts_ns->name; > >> } > >> > >> > > Ok, thanks... > > > > Well, at a minimum we'll have to skip the > > verify_namelist() stage, or perhaps call it later, > > some time after: > > > > (1) task_init() is complete, and > > (2) the required new_utsname fields get filled in from > > following the trail above, perhaps from the first > > idle task? > > > > Unless there's some other way we can access it. > > I think you can get it from init_uts_ns.name, > where 'name' is struct new_utsname. > > init/version.c: > struct uts_namespace init_uts_ns = { > .kref = { > .refcount = ATOMIC_INIT(2), > }, > .name = { > .sysname = UTS_SYSNAME, > .nodename = UTS_NODENAME, > .release = UTS_RELEASE, > .version = UTS_VERSION, > .machine = UTS_MACHINE, > .domainname = UTS_DOMAINNAME, > }, > }; > > Thanks, > -- > Jun'ichi Nomura, NEC Solutions (America), Inc. > Yep, thanks Nic, I was just looking at the kernel patch, and it looks simple enough. Badari, since this is read PRE_GDB, can you try something like this: $ diff kernel.c.orig kernel.c 120,122c120,130 < readmem(symbol_value("system_utsname"), KVADDR, &kt->utsname, < sizeof(struct new_utsname), "system_utsname", < FAULT_ON_ERROR); --- > if (symbol_exists("system_utsname")) > readmem(symbol_value("system_utsname"), KVADDR, &kt->utsname, > sizeof(struct new_utsname), "system_utsname", > RETURN_ON_ERROR); > else if (symbol_exists("init_uts_ns")) > readmem(symbol_value("init_uts_ns") + sizeof(int), > KVADDR, &kt->utsname, sizeof(struct new_utsname), > "init_uts_ns", RETURN_ON_ERROR); > else > error(INFO, "cannot access utsname information\n\n"); > $ Thanks, Dave