On Fri, Mar 9, 2018 at 5:54 PM Jeremy Cline <jeremy@xxxxxxxxxx> wrote: > On Fri, Mar 09, 2018 at 10:43:50AM +0000, Thiebaud Weksteen wrote: > > Thanks a lot for trying out the patch! > > > > Please don't modify your install at this stage, I think we are hitting a > > firmware bug and that would be awesome if we can fix how we are handling it. > > So, if we reach that stage in the function it could either be that: > > * The allocation did not succeed, somehow, but the firmware still returned > > EFI_SUCCEED. > > * The size requested is incorrect (I'm thinking something like a 1G of > > log). This would be due to either a miscalculation of log_size (possible) > > or; the returned values of GetEventLog are not correct. > > I'm sending a patch to add checks for these. Could you please apply and > > retest? > > Again, thanks for helping debugging this. > No problem, thanks for the help :) > With the new patch: > Locating the TCG2Protocol > Calling GetEventLog on TCG2Protocol > Log returned > log_location is not empty > log_size != 0 > log_size < 1M > Allocating memory for storing the logs > Returned from memory allocation > Copying log to new location > And then it hangs. I added a couple more print statements: > diff --git a/drivers/firmware/efi/libstub/tpm.c b/drivers/firmware/efi/libstub/tpm.c > index ee3fac109078..1ab5638bc50e 100644 > --- a/drivers/firmware/efi/libstub/tpm.c > +++ b/drivers/firmware/efi/libstub/tpm.c > @@ -148,8 +148,11 @@ void efi_retrieve_tpm2_eventlog_1_2(efi_system_table_t *sys_table_arg) > efi_printk(sys_table_arg, "Copying log to new location\n"); > memset(log_tbl, 0, sizeof(*log_tbl) + log_size); > + efi_printk(sys_table_arg, "Successfully memset log_tbl to 0\n"); > log_tbl->size = log_size; > + efi_printk(sys_table_arg, "Set log_tbl->size\n"); > log_tbl->version = EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2; > + efi_printk(sys_table_arg, "Set log_tbl-version\n"); > memcpy(log_tbl->log, (void *) first_entry_addr, log_size); > efi_printk(sys_table_arg, "Installing the log into the configuration table\n"); > and it's hanging at "memset(log_tbl, 0, sizeof(*log_tbl) + log_size);" Thanks. Well, it looks like the memory that is supposedly allocated is not usable. I'm thinking this is a firmware bug. Ard, would you agree on this assumption? Thoughts on how to proceed? Thanks > Regards, > Jeremy -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
