syzbot

 sign-in | mailing list | source | docs
🐞 Open [829]
🐞 Fixed [87]
🐞 Invalid [1201]
⬇ Missing Backports [133]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

BUG: unable to handle kernel paging request in mcp_smbus_xfer

Status: upstream: reported C repro on 2024/07/26 10:14
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+24b122f8e84c3f9d9d1d@syzkaller.appspotmail.com
First crash: 551d, last: 9h10m
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[PATCH 5.10/5.15/6.1] HID: mcp2221: Set driver data before I2C adapter add 1 (1) 2025/04/01 09:47
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/07/26 linux-5.15.y (ToT) 7c6d66f0266f C [report] BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 upstream (ToT) 2f8c4f506285 C Didn't crash
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: unable to handle kernel paging request in mcp_smbus_xfer origin:lts-only 8 C done 143 188d 551d 0/3 upstream: reported C repro on 2024/07/26 12:21
▶ ▼ Last patch testing requests (12)
Created Duration User Patch Repo Result
2025/09/27 05:02 12m retest repro linux-5.15.y report log
2025/09/27 05:02 10m retest repro linux-5.15.y report log
2025/09/27 05:02 10m retest repro linux-5.15.y report log
2025/09/27 05:02 11m retest repro linux-5.15.y report log
2025/09/27 05:02 10m retest repro linux-5.15.y report log
2025/07/14 13:44 2h40m hannelotta@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git 1c700860e8bc079c5c71d73c55e51865d273943c OK log
2025/07/14 10:20 3h03m hannelotta@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git 7c6d66f0266faf94d04b3bfe0d7a06eae3484c50 error
2025/05/04 12:53 15m retest repro linux-5.15.y report log
2025/05/04 12:53 12m retest repro linux-5.15.y report log
2025/05/04 12:53 15m retest repro linux-5.15.y report log
2025/05/04 12:53 11m retest repro linux-5.15.y report log
2025/05/04 12:53 11m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2026/01/24 20:50 1m fix candidate upstream error job log
2025/12/19 16:59 6m fix candidate upstream error job log
2025/10/23 02:50 1m fix candidate upstream error job log
2025/07/29 17:16 1m fix candidate upstream error job log
2024/10/09 22:47 1m bisect fix linux-5.15.y error job log

Sample crash report:
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
mcp2221 0003:04D8:00DD.0001: USB HID v0.05 Device [HID 04d8:00dd] on usb-dummy_hcd.0-1/input0
Unable to handle kernel paging request at virtual address dfff800000000000
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : mcp_smbus_xfer+0x64/0xdc8 drivers/hid/hid-mcp2221.c:418
lr : mcp_smbus_xfer+0x44/0xdc8 drivers/hid/hid-mcp2221.c:414
sp : ffff80001b306140
x29: ffff80001b306140 x28: 0000000000000000 x27: dfff800000000000
x26: 00000000ffff9c0b x25: 1fffe00018390036 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000018
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000
x17: ffff800016cf0000 x16: ffff8000111a97c4 x15: ffff8000167d04c0
x14: ffff0000c0958a00 x13: dfff800000000000 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000ed6395c
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000018 x0 : ffff0000c1c80088
Call trace:
 mcp_smbus_xfer+0x64/0xdc8 drivers/hid/hid-mcp2221.c:418
 __i2c_smbus_xfer+0x558/0x1fbc drivers/i2c/i2c-core-smbus.c:590
 i2c_smbus_xfer+0x1f0/0x314 drivers/i2c/i2c-core-smbus.c:545
 i2c_default_probe+0x1bc/0x240 drivers/i2c/i2c-core-base.c:-1
 i2c_detect_address drivers/i2c/i2c-core-base.c:2466 [inline]
 i2c_detect drivers/i2c/i2c-core-base.c:2541 [inline]
 i2c_do_add_adapter+0x388/0x7a0 drivers/i2c/i2c-core-base.c:1422
 __process_new_adapter+0x28/0x3c drivers/i2c/i2c-core-base.c:1429
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 i2c_register_adapter+0xd80/0x103c drivers/i2c/i2c-core-base.c:1594
 i2c_add_adapter+0x16c/0x248 drivers/i2c/i2c-core-base.c:-1
 mcp2221_probe+0x254/0x5a8 drivers/hid/hid-mcp2221.c:882
 hid_device_probe+0x230/0x338 drivers/hid/hid-core.c:2309
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26c/0xaec drivers/base/dd.c:595
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:755
 driver_probe_device+0x78/0x34c drivers/base/dd.c:785
 __device_attach_driver+0x274/0x4c4 drivers/base/dd.c:907
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:979
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1028
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3412
 hid_add_device+0x310/0x4d4 drivers/hid/hid-core.c:2461
 usbhid_probe+0x858/0xba4 drivers/hid/usbhid/hid-core.c:1424
 usb_probe_interface+0x4fc/0x994 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26c/0xaec drivers/base/dd.c:595
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:755
 driver_probe_device+0x78/0x34c drivers/base/dd.c:785
 __device_attach_driver+0x274/0x4c4 drivers/base/dd.c:907
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:979
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1028
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3412
 usb_set_configuration+0x15b8/0x1b2c drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:238
 usb_probe_device+0x120/0x25c drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26c/0xaec drivers/base/dd.c:595
 __driver_probe_device+0x180/0x314 drivers/base/dd.c:755
 driver_probe_device+0x78/0x34c drivers/base/dd.c:785
 __device_attach_driver+0x274/0x4c4 drivers/base/dd.c:907
 bus_for_each_drv+0x150/0x1d8 drivers/base/bus.c:429
 __device_attach+0x2a8/0x3d4 drivers/base/dd.c:979
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1028
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf94 drivers/base/core.c:3412
 usb_new_device+0x7ec/0x1164 drivers/usb/core/hub.c:2604
 hub_port_connect drivers/usb/core/hub.c:5467 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5607 [inline]
 port_event drivers/usb/core/hub.c:5753 [inline]
 hub_event+0x20cc/0x4188 drivers/usb/core/hub.c:5835
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Code: aa1303e0 966ba2e0 f9400273 d343fe7c (387b6b88) 
---[ end trace 5f81facddaf0ce63 ]---
----------------
Code disassembly (best guess):
   0:	aa1303e0 	mov	x0, x19
   4:	966ba2e0 	bl	0xfffffffff9ae8b84
   8:	f9400273 	ldr	x19, [x19]
   c:	d343fe7c 	lsr	x28, x19, #3
* 10:	387b6b88 	ldrb	w8, [x28, x27] <-- trapping instruction

Crashes (262):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/21 11:14 linux-5.15.y 1c700860e8bc d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2025/03/13 05:10 linux-5.15.y c16c81c81336 1a5d9317 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/12/01 16:48 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 13:27 linux-5.15.y 7c6d66f0266f 3f86dfed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 12:37 linux-5.15.y 7c6d66f0266f 3f86dfed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 11:38 linux-5.15.y 7c6d66f0266f 3f86dfed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 11:08 linux-5.15.y 7c6d66f0266f 3f86dfed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2025/10/01 10:04 linux-5.15.y 43bb85222e53 65a0eece .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/08/28 17:36 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2025/08/28 15:43 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2024/07/26 10:13 linux-5.15.y 7c6d66f0266f 3f86dfed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in mcp_smbus_xfer
2026/01/28 14:51 linux-5.15.y 9eec9a14ee10 004c195c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/28 13:28 linux-5.15.y 9eec9a14ee10 004c195c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/28 00:35 linux-5.15.y 9eec9a14ee10 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/27 16:18 linux-5.15.y 9eec9a14ee10 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/27 13:48 linux-5.15.y 9eec9a14ee10 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/27 12:37 linux-5.15.y 9eec9a14ee10 9a514c2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/27 01:38 linux-5.15.y 9eec9a14ee10 efb3e894 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/26 12:59 linux-5.15.y 9eec9a14ee10 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/26 00:05 linux-5.15.y 9eec9a14ee10 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/25 03:30 linux-5.15.y 9eec9a14ee10 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/23 14:52 linux-5.15.y 9eec9a14ee10 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/22 21:59 linux-5.15.y 9eec9a14ee10 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/21 12:33 linux-5.15.y 9eec9a14ee10 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/21 09:45 linux-5.15.y 9eec9a14ee10 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/21 08:03 linux-5.15.y 9eec9a14ee10 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/20 18:37 linux-5.15.y 9eec9a14ee10 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/20 15:23 linux-5.15.y 9eec9a14ee10 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/20 07:31 linux-5.15.y 9eec9a14ee10 572effc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/18 05:22 linux-5.15.y 68efe5a6c16a 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/17 23:12 linux-5.15.y 68efe5a6c16a 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/16 18:52 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/14 16:56 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/13 12:16 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/12 15:13 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/10 16:01 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/10 05:45 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/10 02:32 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/09 14:04 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/08 21:53 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/07 02:48 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/06 08:43 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/05 02:17 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2026/01/01 09:49 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/31 17:50 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/29 23:20 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/24 11:05 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/20 19:39 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/19 08:54 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/15 07:24 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/14 23:32 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/12 20:37 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/12 08:47 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
2025/12/12 02:19 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in mcp_smbus_xfer
* Struck through repros no longer work on HEAD.