Dan Williams b529544b01 tools/testing/nvdimm: fix SIGTERM vs hotplug crash ... commit d8d378fa1a upstream. The unit tests crash when hotplug races the previous probe. This race requires that the loading of the nfit_test module be terminated with SIGTERM, and the module to be unloaded while the ars scan is still running. In contrast to the normal nfit driver, the unit test calls acpi_nfit_init() twice to simulate hotplug, whereas the nominal case goes through the acpi_nfit_notify() event handler. The acpi_nfit_notify() path is careful to flush the previous region registration before servicing the hotplug event. The unit test was missing this guarantee. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff810cdce7>] pwq_activate_delayed_work+0x47/0x170 [..] Call Trace: [<ffffffff810ce186>] pwq_dec_nr_in_flight+0x66/0xa0 [<ffffffff810ce490>] process_one_work+0x2d0/0x680 [<ffffffff810ce331>] ? process_one_work+0x171/0x680 [<ffffffff810ce88e>] worker_thread+0x4e/0x480 [<ffffffff810ce840>] ? process_one_work+0x680/0x680 [<ffffffff810ce840>] ? process_one_work+0x680/0x680 [<ffffffff810d5343>] kthread+0xf3/0x110 [<ffffffff8199846f>] ret_from_fork+0x1f/0x40 [<ffffffff810d5250>] ? kthread_create_on_node+0x230/0x230 Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-09-07 08:32:36 +02:00
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test	tools/testing/nvdimm: fix SIGTERM vs hotplug crash	2016-09-07 08:32:36 +02:00
config_check.c	tools/testing/nvdimm: libnvdimm unit test infrastructure	2015-06-26 11:23:38 -04:00
Kbuild	libnvdimm, pmem: 'struct page' for pmem	2015-08-28 23:40:04 -04:00
Makefile	tools/testing/nvdimm: libnvdimm unit test infrastructure	2015-06-26 11:23:38 -04:00