Messages in this thread Patch in this message | | | From | "Luis R. Rodriguez" <> | Subject | [PATCH v2 2/8] lib/test_firmware.c: use late_initcall() | Date | Thu, 16 Jun 2016 16:59:13 -0700 |
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When expanding test coverage of firmware_class with the sysdata API test driver we get a crash when CONFIG_TEST_FIRMWARE=y, only a combination produces a panic however. This fixes it.
------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at lib/kobject.c:597 kobject_get+0x4d/0x80 kobject: '(null)' (ffffea0000722850): is not initialized, yet kobject_get() is being called. Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.6.0-rc3-1-default+ #127 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS by qemu-project.org 04/01/2014 0000000000000000 ffff88001e223c48 ffffffff813948c1 ffff88001e223c98 0000000000000000 ffff88001e223c88 ffffffff8107eecb 00000255024080c0 ffff88001f837810 ffffea0000722840 0000000000000000 ffff88001f837800 Call Trace: [<ffffffff813948c1>] dump_stack+0x63/0x82 [<ffffffff8107eecb>] __warn+0xcb/0xf0 [<ffffffff8107ef3f>] warn_slowpath_fmt+0x4f/0x60 [<ffffffff814d6783>] ? device_private_init+0x23/0x70 [<ffffffff81396cdd>] kobject_get+0x4d/0x80 [<ffffffff814d68aa>] device_add+0xda/0x680 [<ffffffff814d7040>] device_create_groups_vargs+0xe0/0xf0 [<ffffffff81d82675>] ? test_firmware_init+0xb2/0xb2 [<ffffffff814d70f6>] device_create_with_groups+0x36/0x40 [<ffffffff813ae6d1>] ? test_dev_get_name+0x91/0xd0 [<ffffffff814ad3d5>] misc_register+0x145/0x180 [<ffffffff81d826a8>] test_sysdata_init+0x33/0xc8 [<ffffffff81002123>] do_one_initcall+0xb3/0x200 [<ffffffff8109d805>] ? parse_args+0x295/0x4b0 [<ffffffff81d3e12b>] kernel_init_freeable+0x183/0x20e [<ffffffff816a1ace>] kernel_init+0xe/0x100 [<ffffffff816af062>] ret_from_fork+0x22/0x40 [<ffffffff816a1ac0>] ? rest_init+0x90/0x90 ---[ end trace 3779de9087657326 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at lib/kobject.c:597 kobject_get+0x4d/0x80 kobject: '(null)' (ffffea0000722850): is not initialized, yet kobject_get() is being called. Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.6.0-rc3-1-default+ #127 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS by qemu-project.org 04/01/2014 0000000000000000 ffff88001e223b70 ffffffff813948c1 ffff88001e223bc0 0000000000000000 ffff88001e223bb0 ffffffff8107eecb 00000255816af7cb ffff88001f80c400 0000000000000000 ffffea0000722850 ffff88001f836800 Call Trace: [<ffffffff813948c1>] dump_stack+0x63/0x82 [<ffffffff8107eecb>] __warn+0xcb/0xf0 [<ffffffff8107ef3f>] warn_slowpath_fmt+0x4f/0x60 [<ffffffff813a90e5>] ? find_next_bit+0x15/0x20 [<ffffffff81396cdd>] kobject_get+0x4d/0x80 [<ffffffff81397629>] kobject_add_internal+0x39/0x340 [<ffffffff811a9512>] ? kfree_const+0x22/0x30 [<ffffffff81397998>] kobject_add+0x68/0xb0 [<ffffffff8107ef3f>] ? warn_slowpath_fmt+0x4f/0x60 [<ffffffff814d5b3d>] get_device_parent.isra.19+0x10d/0x1d0 [<ffffffff814d68c1>] device_add+0xf1/0x680 [<ffffffff814d7040>] device_create_groups_vargs+0xe0/0xf0 [<ffffffff81d82675>] ? test_firmware_init+0xb2/0xb2 [<ffffffff814d70f6>] device_create_with_groups+0x36/0x40 [<ffffffff813ae6d1>] ? test_dev_get_name+0x91/0xd0 [<ffffffff814ad3d5>] misc_register+0x145/0x180 [<ffffffff81d826a8>] test_sysdata_init+0x33/0xc8 [<ffffffff81002123>] do_one_initcall+0xb3/0x200 [<ffffffff8109d805>] ? parse_args+0x295/0x4b0 [<ffffffff81d3e12b>] kernel_init_freeable+0x183/0x20e [<ffffffff816a1ace>] kernel_init+0xe/0x100 [<ffffffff816af062>] ret_from_fork+0x22/0x40 [<ffffffff816a1ac0>] ? rest_init+0x90/0x90 ---[ end trace 3779de9087657327 ]--- general protection fault: 0000 [#1] PREEMPT SMP
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> --- lib/test_firmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/test_firmware.c b/lib/test_firmware.c index a3e8ec3fb1c5..5f087a03e5f7 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -167,7 +167,7 @@ dereg: return rc; } -module_init(test_firmware_init); +late_initcall(test_firmware_init); static void __exit test_firmware_exit(void) { -- 2.8.2
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