dell_rbtn - kernel panic at boot...

[Valdis Kletnieks]

So after I made both config variables =y, the resulting kernel built, but
died a glorious death at boot.

Dell Latitude E6530, most current released BIOS.

[    1.760739] BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
[    1.760778] IP: [<ffffffffa79460cc>] klist_next+0x1c/0x1d0
[    1.760804] PGD 0 
[    1.760816] Oops: 0000 [#1] PREEMPT SMP 
[    1.760842] Modules linked in:
[    1.761268] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc4-next-20150521 #55
[    1.761295] Hardware name: Dell Inc. Latitude E6530/07Y85M, BIOS A16 09/24/2014
[    1.761320] task: ffff88022ca10010 ti: ffff88022ca14000 task.ti: ffff88022ca14000
[    1.761346] RIP: 0010:[<ffffffffa79460cc>]  [<ffffffffa79460cc>] klist_next+0x1c/0x1d0
[    1.761377] RSP: 0000:ffff88022ca17d58  EFLAGS: 00010292
[    1.761396] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa7633580
[    1.761420] RDX: 0000000000000000 RSI: ffff88022ca17db0 RDI: 0000000000000040
[    1.761445] RBP: ffff88022ca17d98 R08: 0000000000000000 R09: 00000000000a204a
[    1.761469] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88022ca17db0
[    1.761471] sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[    1.761473] sd 0:0:0:0: [sda] 4096-byte physical blocks
[    1.761533] R13: 0000000000000000 R14: ffffffffa7ff466d R15: 0000000000000000
[    1.761558] FS:  0000000000000000(0000) GS:ffff88022dc80000(0000) knlGS:0000000000000000
[    1.761585] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.761605] CR2: 0000000000000090 CR3: 0000000027e0b000 CR4: 00000000001406e0
[    1.761628] Stack:
[    1.761633] sd 0:0:0:0: [sda] Write Protect is off
[    1.761635] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    1.761671]  ffff88022ca17dd8 ffffffffa73b8929 0000000000000000
[    1.761694] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    1.761725]  0000000000000000
[    1.761743]  ffff88022ca17dfc ffffffffa7633580 ffffffffa7ff466d 0000000000000000
[    1.761782]  ffff88022ca17de8 ffffffffa74a202c ffffffffa7f07f10 0000000000000040
[    1.761846] Call Trace:
[    1.761871]  [<ffffffffa73b8929>] ? ___preempt_schedule+0x12/0x14
[    1.761894]  [<ffffffffa7633580>] ? rbtn_rfkill_set_block+0x10/0x10
[    1.761916]  [<ffffffffa7ff466d>] ? find_tokens+0xa2/0xa2
[    1.761938]  [<ffffffffa74a202c>] driver_for_each_device+0x6c/0xb0
[    1.761960]  [<ffffffffa7633752>] dell_rbtn_notifier_register+0x42/0xc0
[    1.761984]  [<ffffffffa7ff4981>] dell_init+0x314/0x98c
[    1.762003]  [<ffffffffa7ff466d>] ? find_tokens+0xa2/0xa2
[    1.762024]  [<ffffffffa70002b9>] do_one_initcall+0x99/0x210
[    1.762046]  [<ffffffffa7081300>] ? parse_args+0x140/0x3b0
[    1.762068]  [<ffffffffa7fb0237>] kernel_init_freeable+0x1c0/0x261
[    1.762090]  [<ffffffffa7946b90>] ? rest_init+0x140/0x140
[    1.762110]  [<ffffffffa7946b9e>] kernel_init+0xe/0xe0
[    1.762129]  [<ffffffffa795b00f>] ret_from_fork+0x3f/0x70
[    1.762149]  [<ffffffffa7946b90>] ? rest_init+0x140/0x140
[    1.762168] Code: ff ff 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 fc 53 48 83 ec 18 48 8b 3f 4d 8b 6c 24 08 <4c> 8b 77 50 e8 2b 3b 01 00 4d 85 ed 0f 84 30 01 00 00 49 8b 45 
[    1.762415] RIP  [<ffffffffa79460cc>] klist_next+0x1c/0x1d0
[    1.762437]  RSP <ffff88022ca17d58>
[    1.762450] CR2: 0000000000000090
[    1.762466] ---[ end trace 24f4c0df0e74c2d0 ]---
[    1.762737] scsi 1:0:0:0: CD-ROM            MATSHITA DVD+-RW UJ8C2    1.02 PQ: 0 ANSI: 5
[    1.765506]  sda: sda1 sda2 sda3
[    1.766304] sd 0:0:0:0: [sda] Attached SCSI disk
[    1.905686] 
[    1.905686] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
[    1.909713] Kernel Offset: 0x26000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

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