Hi Vadik, Oliver,
Thanks for reporting, and sorry that 5.13.0-24-generic in -proposed
didn't solve the issue.
Let's do some analysis:
[ 1.381250] BUG: kernel NULL pointer dereference, address: 000000000000000c
[ 1.381270] RIP: 0010:amd_sfh_hid_client_init+0x47/0x350 [amd_sfh]
[ 1.381299] Call Trace:
[ 1.381302] ? __pci_set_master+0x5f/0xe0
[ 1.381310] amd_mp2_pci_probe+0xad/0x160 [amd_sfh]
[ 1.381314] local_pci_probe+0x48/0x80
...
Okay, so a null pointer dereference in the amd_sfh module. The c in
000000000000000c probably means offset +12 in the struct we are trying
to access.
Let's see where this is:
$ eu-addr2line -ifae
./usr/lib/debug/lib/modules/5.13.0-23-generic/kernel/drivers/hid/amd-sfh-hid/amd_sfh.ko
amd_sfh_hid_client_init+0x47
0x0000000000000767
amd_sfh_hid_client_init
/build/linux-k2e9CH/linux-5.13.0/drivers/hid/amd-sfh-hid/amd_sfh_client.c:147:27
Let's have a look:
134 int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
135 {
...
146
147 cl_data->num_hid_devices = amd_mp2_get_sensor_num(privdata,
&cl_data->sensor_idx[0]);
148
...
Okay, so we are dereferencing either cl_data->num_hid_devices or
&cl_data->sensor_idx[0], but they are both in cl_data, so cl_data will
be NULL.
Since you mentioned that it worked in 5.13.0-22-generic, and broke in
5.13.0-23-generic, lets see if this changed in 5.13.0-23-generic:
$ git log --grep "amd_sfh" Ubuntu-5.13.0-22.22..Ubuntu-5.13.0-23.23
commit d46ef750ed58cbeeba2d9a55c99231c30a172764
commit-impish 56559d7910e704470ad72da58469b5588e8cbf85
Author: Evgeny Novikov <novi...@ispras.ru>
Date: Tue Jun 1 19:38:01 2021 +0300
Subject:HID: amd_sfh: Fix potential NULL pointer dereference
Link:
https://github.com/torvalds/linux/commit/d46ef750ed58cbeeba2d9a55c99231c30a172764
Okay, so this patch changes the parent function to
amd_sfh_hid_client_init(), which is amd_mp2_pci_probe().
+ rc = amd_sfh_hid_client_init(privdata);
+ if (rc)
+ return rc;
+
privdata->cl_data = devm_kzalloc(&pdev->dev, sizeof(struct
amdtp_cl_data), GFP_KERNEL);
if (!privdata->cl_data)
return -ENOMEM;
...
- return amd_sfh_hid_client_init(privdata);
+ return 0;
So it seems we are moving the call to amd_sfh_hid_client_init(privdata) from
the end of the function up a bit, and interestingly, before the call to
privdata->cl_data = devm_kzalloc().
So... we are using privdata->cl_data before it is being allocated? Looks
like we have found our NULL pointer dereference.
I suppose the commit to "fix" the null pointer dereference actually
introduced another one.
Looking at this commit in the upstream tree, I came across:
commit 88a04049c08cd62e698bc1b1af2d09574b9e0aee
Author: Basavaraj Natikar <basavaraj.nati...@amd.com>
Date: Thu Sep 23 17:59:27 2021 +0530
Subject: HID: amd_sfh: Fix potential NULL pointer dereference
Link:
https://github.com/torvalds/linux/commit/88a04049c08cd62e698bc1b1af2d09574b9e0aee
This patch seems to move the call to after cl_data is allocated, which
should fix this.
- rc = amd_sfh_hid_client_init(privdata);
- if (rc)
- return rc;
-
privdata->cl_data = devm_kzalloc(&pdev->dev, sizeof(struct
amdtp_cl_data), GFP_KERNEL);
if (!privdata->cl_data)
return -ENOMEM;
- rc = devm_add_action_or_reset(&pdev->dev, amd_mp2_pci_remove, privdata);
+ mp2_select_ops(privdata);
+
+ rc = amd_sfh_hid_client_init(privdata);
This commit landed in 5.15-rc4:
$ git describe --contains 88a04049c08cd62e698bc1b1af2d09574b9e0aee
v5.15-rc4~40^2
It seems it was backported to 5.14.10:
https://lwn.net/Articles/872195/
Impish should have gotten 5.14.10 during its regular upstream -stable
patches:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1950388
The commit is listed there, but when I search the Impish git tree, it is
missing?
I think what has happened is the two commits have the same name, and
Kamal must have gotten confused and thought it was a duplicate, and
dropped it.
Here's what we are going to do.
I will build you a test kernel based on 5.13.0-23-generic, that includes
Basavaraj Natikar's fix, and I will provide instructions on how to
install it. You can test it to make sure it fixes the issue, and if it
does, I will submit the patch for SRU to the 5.13 kernel.
I will write back once the test kernel has finished building, probably
tomorrow.
Thanks,
Matthew
** Changed in: linux (Ubuntu Impish)
Assignee: (unassigned) => Matthew Ruffell (mruffell)
** Tags added: seg
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https://bugs.launchpad.net/bugs/1956519
Title:
kernel panic after upgrading to kernel 5.13.0-23
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Impish:
In Progress
Bug description:
After upgrading my son's Asus PN50 with Ubuntu 21.10 to the latest
kernel 5.13.0-23, I am no longer able to boot it normally. Kernel
fails with the panic halfway through the boot process (which got
overall suspiciously slow):
[ 1.359465] BUG: kernel NULL pointer dereference, address: 000000000000000c
[ 1.359498] #PF: supervisor write access in kernel mode
[ 1.359519] #PF: error_code(0x0002) - not-present page
[ 1.359540] PGD 0 P4D 0
[ 1.359553] Oops: 0002 [#1] SMP NOPTI
[ 1.359569] CPU: 0 PID: 175 Comm: systemd-udevd Not tainted
5.13.0-23-generic #23-Ubuntu
[ 1.359602] Hardware name: ASUSTeK COMPUTER INC. MINIPC PN50/PN50, BIOS
0623 05/13/2021
[ 1.359632] RIP: 0010:amd_sfh_hid_client_init+0x47/0x350 [amd_sfh]
[ 1.359661] Code: 00 53 48 83 ec 20 48 8b 5f 08 48 8b 07 48 8d b3 22 01 00
00 4c 8d b0 c8 00 00 00 e8 23 07 00 00 45 31 c0 31 c9 ba 00 00 20 00 <89> 43 0c
48 8d 83 68 01 00 00 48 8d bb 80 01 00 00 48 c7 c6 20 6d
[ 1.359729] RSP: 0018:ffffbf71c099f9d8 EFLAGS: 00010246
[ 1.359750] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
[ 1.359777] RDX: 0000000000200000 RSI: ffffffffc03cd249 RDI:
ffffffffa680004c
[ 1.359804] RBP: ffffbf71c099fa20 R08: 0000000000000000 R09:
0000000000000006
[ 1.359831] R10: ffffbf71c0d00000 R11: 0000000000000007 R12:
0000000fffffffe0
[ 1.359857] R13: ffff992bc3387cd8 R14: ffff992bc11560c8 R15:
ffff992bc3387cd8
[ 1.359884] FS: 00007ff0ec1a48c0(0000) GS:ffff992ebf600000(0000)
knlGS:0000000000000000
[ 1.359915] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.359937] CR2: 000000000000000c CR3: 0000000102fd0000 CR4:
0000000000350ef0
[ 1.359964] Call Trace:
[ 1.359976] ? __pci_set_master+0x5f/0xe0
[ 1.359997] amd_mp2_pci_probe+0xad/0x160 [amd_sfh]
[ 1.360021] local_pci_probe+0x48/0x80
[ 1.360038] pci_device_probe+0x105/0x1c0
[ 1.360056] really_probe+0x24b/0x4c0
[ 1.360073] driver_probe_device+0xf0/0x160
[ 1.360091] device_driver_attach+0xab/0xb0
[ 1.360110] __driver_attach+0xb2/0x140
[ 1.360126] ? device_driver_attach+0xb0/0xb0
[ 1.360145] bus_for_each_dev+0x7e/0xc0
[ 1.360161] driver_attach+0x1e/0x20
[ 1.360177] bus_add_driver+0x135/0x1f0
[ 1.360194] driver_register+0x95/0xf0
[ 1.360210] ? 0xffffffffc03d2000
[ 1.360225] __pci_register_driver+0x57/0x60
[ 1.360242] amd_mp2_pci_driver_init+0x23/0x1000 [amd_sfh]
[ 1.360266] do_one_initcall+0x48/0x1d0
[ 1.360284] ? kmem_cache_alloc_trace+0xfb/0x240
[ 1.360306] do_init_module+0x62/0x290
[ 1.360323] load_module+0xa8f/0xb10
[ 1.360340] __do_sys_finit_module+0xc2/0x120
[ 1.360359] __x64_sys_finit_module+0x18/0x20
[ 1.360377] do_syscall_64+0x61/0xb0
[ 1.361638] ? ksys_mmap_pgoff+0x135/0x260
[ 1.362883] ? exit_to_user_mode_prepare+0x37/0xb0
[ 1.364121] ? syscall_exit_to_user_mode+0x27/0x50
[ 1.365343] ? __x64_sys_mmap+0x33/0x40
[ 1.366550] ? do_syscall_64+0x6e/0xb0
[ 1.367749] ? do_syscall_64+0x6e/0xb0
[ 1.368923] ? do_syscall_64+0x6e/0xb0
[ 1.370079] ? syscall_exit_to_user_mode+0x27/0x50
[ 1.371227] ? do_syscall_64+0x6e/0xb0
[ 1.372359] ? exc_page_fault+0x8f/0x170
[ 1.373478] ? asm_exc_page_fault+0x8/0x30
[ 1.374584] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 1.375684] RIP: 0033:0x7ff0ec73a94d
[ 1.376767] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d b3 64 0f 00 f7 d8 64 89 01 48
[ 1.377926] RSP: 002b:00007ffd00724ba8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 1.379076] RAX: ffffffffffffffda RBX: 000055e130084390 RCX:
00007ff0ec73a94d
[ 1.380225] RDX: 0000000000000000 RSI: 00007ff0ec8ca3fe RDI:
0000000000000005
[ 1.381363] RBP: 0000000000020000 R08: 0000000000000000 R09:
0000000000000000
[ 1.382488] R10: 0000000000000005 R11: 0000000000000246 R12:
00007ff0ec8ca3fe
[ 1.383598] R13: 000055e130083370 R14: 000055e130084480 R15:
000055e130086cb0
[ 1.384698] Modules linked in: ahci(+) libahci i2c_piix4(+) r8169(+)
amd_sfh(+) i2c_hid_acpi realtek i2c_hid xhci_pci(+) xhci_pci_renesas wmi(+)
video(+) fjes(+) hid
[ 1.385841] CR2: 000000000000000c
[ 1.386955] ---[ end trace b2ebcacf74b788da ]---
[ 1.388064] RIP: 0010:amd_sfh_hid_client_init+0x47/0x350 [amd_sfh]
[ 1.389176] Code: 00 53 48 83 ec 20 48 8b 5f 08 48 8b 07 48 8d b3 22 01 00
00 4c 8d b0 c8 00 00 00 e8 23 07 00 00 45 31 c0 31 c9 ba 00 00 20 00 <89> 43 0c
48 8d 83 68 01 00 00 48 8d bb 80 01 00 00 48 c7 c6 20 6d
[ 1.390374] RSP: 0018:ffffbf71c099f9d8 EFLAGS: 00010246
[ 1.391560] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
[ 1.392338] piix4_smbus 0000:00:14.0: Auxiliary SMBus Host Controller at
0xb20
[ 1.392763] RDX: 0000000000200000 RSI: ffffffffc03cd249 RDI:
ffffffffa680004c
[ 1.395162] RBP: ffffbf71c099fa20 R08: 0000000000000000 R09:
0000000000000006
[ 1.396372] R10: ffffbf71c0d00000 R11: 0000000000000007 R12:
0000000fffffffe0
[ 1.397564] R13: ffff992bc3387cd8 R14: ffff992bc11560c8 R15:
ffff992bc3387cd8
[ 1.398754] FS: 00007ff0ec1a48c0(0000) GS:ffff992ebf600000(0000)
knlGS:0000000000000000
[ 1.399916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.401044] CR2: 000000000000000c CR3: 0000000102fd0000 CR4:
0000000000350ef0
Previous kernel 5.13.0-22 works alright.
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: linux-image-5.13.0-23-generic 5.13.0-23.23
ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19
Uname: Linux 5.13.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-id',
'/dev/snd/controlC1', '/dev/snd/pcmC1D0c', '/dev/snd/controlC2',
'/dev/snd/hwC2D0', '/dev/snd/pcmC2D0c', '/dev/snd/pcmC2D0p',
'/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0',
'/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p',
'/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: unknown
Date: Wed Jan 5 19:00:15 2022
InstallationDate: Installed on 2021-01-01 (369 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: ASUSTeK COMPUTER INC. MINIPC PN50
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_ct91lc@/vmlinuz-5.13.0-22-generic
root=ZFS=rpool/ROOT/ubuntu_ct91lc ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-5.13.0-22-generic N/A
linux-backports-modules-5.13.0-22-generic N/A
linux-firmware 1.201.3
SourcePackage: linux
UpgradeStatus: Upgraded to impish on 2021-10-17 (80 days ago)
WifiSyslog:
dmi.bios.date: 05/13/2021
dmi.bios.release: 6.23
dmi.bios.vendor: ASUSTeK COMPUTER INC.
dmi.bios.version: 0623
dmi.board.asset.tag: Default string
dmi.board.name: PN50
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 35
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnASUSTeKCOMPUTERINC.:bvr0623:bd05/13/2021:br6.23:svnASUSTeKCOMPUTERINC.:pnMINIPCPN50:pvr0623:rvnASUSTeKCOMPUTERINC.:rnPN50:rvrTobefilledbyO.E.M.:cvnDefaultstring:ct35:cvrDefaultstring:sku:
dmi.product.family: Vivo PC
dmi.product.name: MINIPC PN50
dmi.product.version: 0623
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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