+Mark Salyzyn Julia, Thanks for the analysis. It probably popped up in 0-day because this patch was recently cherry-picked into the android-4.19 branch. -Todd On Fri, Apr 17, 2020 at 10:05 AM Julia Lawall <julia.lawall(a)inria.fr&gt; wrote: > > If the iteration on line 456 reaches the end of the list, cell will be an > invalid value somewhere in the middle of or above the list head. > > The initialization of cell to NULL is also unnecessary, since no one will > ever see that value. > > This seems to be quite old code. I don't know why the error is showing up > now > > julia > > ---------- Forwarded message ---------- > Date: Fri, 17 Apr 2020 10:44:42 +0800 > From: kbuild test robot <lkp(a)intel.com&gt; > To: kbuild(a)lists.01.org > Cc: lkp(a)intel.com, Julia Lawall <julia.lawall(a)lip6.fr&gt; > Subject: [android-common:android-4.19 1/3] drivers/nvmem/core.c:462:8-12: ERROR: > invalid reference to the index variable of the iterator on line 456 > > CC: kbuild-all(a)lists.01.org > TO: cros-kernel-buildreports(a)googlegroups.com > > tree: https://android.googlesource.com/kernel/common android-4.19 > head: 824a6c4cdf73abdd188b5a1e55fba7c63e18ea81 > commit: 0fc0aae624eca1b9f56a962628c36b8b8829afa0 [1/3] BACKPORT: nvmem: resolve cells from DT at registration time > :::::: branch date: 7 weeks ago > :::::: commit date: 7 weeks ago > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kbuild test robot <lkp(a)intel.com&gt; > Reported-by: Julia Lawall <julia.lawall(a)lip6.fr&gt; > > > coccinelle warnings: (new ones prefixed by >>) > > >> drivers/nvmem/core.c:462:8-12: ERROR: invalid reference to the index variable of the iterator on line 456 > > git remote add android-common https://android.googlesource.com/kernel/common > git remote update android-common > git checkout 0fc0aae624eca1b9f56a962628c36b8b8829afa0 > vim +462 drivers/nvmem/core.c > > b6c217ab9be689 Andrew Lunn 2016-02-26 448 > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 449 static struct nvmem_cell * > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 450 nvmem_find_cell_by_index(struct nvmem_device *nvmem, int index) > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 451 { > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 452 struct nvmem_cell *cell = NULL; > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 453 int i = 0; > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 454 > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 455 mutex_lock(&nvmem_mutex); > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 @456 list_for_each_entry(cell, &nvmem_cells, node) { > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 457 if (index == i++) > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 458 break; > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 459 } > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 460 mutex_unlock(&nvmem_mutex); > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 461 > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 @462 return cell; > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 463 } > 0fc0aae624eca1 Bartosz Golaszewski 2018-09-21 464 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org > > -- > You received this message because you are subscribed to the Google Groups "cros-kernel-buildreports" group. > To unsubscribe from this group and stop receiving emails from it, send an email to cros-kernel-buildreports+unsubscribe(a)googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/cros-kernel-buildreports/alpine.DEB.2.2....