Messages in this thread |  | | Date | Wed, 24 May 2023 13:12:00 -0400 | From | Steven Rostedt <> | Subject | [BUG 6.4-rc3] BUG: kernel NULL pointer dereference in __dev_fwnode |
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I started adding fixes to my urgent branch rebased on top of v6.4-rc3 and ran my tests. Unfortunately they crashed on unrelated code.
Here's the dump:
BUG: kernel NULL pointer dereference, address: 00000000000003e8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI CPU: 0 PID: 1 Comm: swapper/0 Tainted: G N 6.3.0-rc1-test-00011-g27a2195efa8d #49 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__dev_fwnode+0x9/0x2a Code: ff 85 c0 78 16 48 8b 3c 24 89 c6 59 e9 e0 f7 ff ff b8 ea ff ff ff c3 cc cc cc cc 5a c3 cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 <48> 8b 87 e8 03 00 00 48 83 c0 18 c3 cc cc cc cc 48 RSP: 0000:ffffc90000013d88 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810b7a8800 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88810b7a8e20 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810b7a8800 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000fffffffe0 FS: 0000000000000000(0000) GS:ffff88817ae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000003e8 CR3: 000000000221a001 CR4: 0000000000170eb0 Call Trace: <TASK> power_supply_get_battery_info+0x9d/0x6c7 ? preempt_count_sub+0x13/0x20 ? _raw_spin_unlock_irqrestore+0x3d/0x54 __power_supply_register+0x32f/0x48b test_power_init+0x29/0xa0 ? axp20x_usb_power_driver_init+0x17/0x17 do_one_initcall+0x105/0x28f kernel_init_freeable+0x19e/0x1f2 ? rest_init+0x14e/0x14e kernel_init+0x1a/0x127 ret_from_fork+0x22/0x30 </TASK> Modules linked in: CR2: 00000000000003e8 ---[ end trace 0000000000000000 ]---
Attached is the config. I ran a bisect and it found it to be this commit:
27a2195efa8d2 ("power: supply: core: auto-exposure of simple-battery data")
I checked out that commit and tested it, and it crashed. I then reverted that commit, and the crash goes away.
The crash also goes away by reverting that commit on v6.4-rc3.
-- Steve [unhandled content-type:application/octet-stream] |  |