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Message-ID: <000000000000142b0b05e657b3d8@google.com>
Date: Tue, 16 Aug 2022 01:40:24 -0700
From: syzbot <syzbot+4742b8091a2010ffd765@...kaller.appspotmail.com>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com, tj@...nel.org
Subject: [syzbot] upstream boot error: BUG: unable to handle kernel paging
request in kernfs_create_dir_ns
Hello,
syzbot found the following issue on:
HEAD commit: 4a9350597aff Merge tag 'sound-fix-6.0-rc1' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1056a56b080000
kernel config: https://syzkaller.appspot.com/x/.config?x=5d647c9572405910
dashboard link: https://syzkaller.appspot.com/bug?extid=4742b8091a2010ffd765
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4742b8091a2010ffd765@...kaller.appspotmail.com
usbcore: registered new interface driver ath9k_htc
usbcore: registered new interface driver carl9170
usbcore: registered new interface driver ath6kl_usb
usbcore: registered new interface driver ar5523
usbcore: registered new interface driver ath10k_usb
usbcore: registered new interface driver rndis_wlan
mac80211_hwsim: initializing netlink
usbcore: registered new interface driver atusb
mac802154_hwsim mac802154_hwsim: Added 2 mac802154 hwsim hardware radios
VMware vmxnet3 virtual NIC driver - version 1.7.0.0-k-NAPI
usbcore: registered new interface driver catc
usbcore: registered new interface driver kaweth
pegasus: Pegasus/Pegasus II USB Ethernet driver
usbcore: registered new interface driver pegasus
usbcore: registered new interface driver rtl8150
usbcore: registered new interface driver r8152
hso: drivers/net/usb/hso.c: Option Wireless
usbcore: registered new interface driver hso
usbcore: registered new interface driver lan78xx
usbcore: registered new interface driver asix
usbcore: registered new interface driver ax88179_178a
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver cdc_eem
usbcore: registered new interface driver dm9601
usbcore: registered new interface driver sr9700
usbcore: registered new interface driver CoreChips
usbcore: registered new interface driver smsc75xx
usbcore: registered new interface driver smsc95xx
usbcore: registered new interface driver gl620a
usbcore: registered new interface driver net1080
usbcore: registered new interface driver plusb
usbcore: registered new interface driver rndis_host
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
usbcore: registered new interface driver MOSCHIP usb-ethernet driver
usbcore: registered new interface driver int51x1
usbcore: registered new interface driver cdc_phonet
usbcore: registered new interface driver kalmia
usbcore: registered new interface driver ipheth
usbcore: registered new interface driver sierra_net
usbcore: registered new interface driver cx82310_eth
usbcore: registered new interface driver cdc_ncm
usbcore: registered new interface driver huawei_cdc_ncm
usbcore: registered new interface driver lg-vl600
usbcore: registered new interface driver qmi_wwan
usbcore: registered new interface driver cdc_mbim
usbcore: registered new interface driver ch9200
usbcore: registered new interface driver r8153_ecm
VFIO - User Level meta-driver version: 0.3
aoe: AoE v85 initialised.
BUG: unable to handle page fault for address: ffffdc000000000f
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 11826067 P4D 11826067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-syzkaller-14090-g4a9350597aff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:68 [inline]
RIP: 0010:kernfs_new_node fs/kernfs/dir.c:655 [inline]
RIP: 0010:kernfs_create_dir_ns+0x7a/0x220 fs/kernfs/dir.c:1010
Code: 89 4c 24 04 4d 85 e4 4c 0f 44 e3 e8 80 25 7f ff 8b 4c 24 04 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 78 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 01 00 00 49 8b 7c 24 78 45 89 f9 6a 01 41 89
RSP: 0000:ffffc9000027fb38 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff888016ffb0e8 RCX: 00000000000041ed
RDX: 1fffe0000000000f RSI: ffffffff81fc1040 RDI: ffff000000000078
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888147771400
R10: ffffed10281e6c62 R11: 0000000000000000 R12: ffff000000000000
R13: ffffffff8a90b800 R14: ffff888147771400 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffdc000000000f CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
sysfs_create_dir_ns+0x127/0x290 fs/sysfs/dir.c:59
create_dir lib/kobject.c:63 [inline]
kobject_add_internal+0x2c9/0x8f0 lib/kobject.c:223
kobject_add_varg lib/kobject.c:358 [inline]
kobject_init_and_add+0x101/0x160 lib/kobject.c:441
bus_add_driver+0x1e8/0x640 drivers/base/bus.c:611
driver_register+0x220/0x3a0 drivers/base/driver.c:240
i2c_register_driver+0xe1/0x1d0 drivers/i2c/i2c-core-base.c:1861
do_one_initcall+0xfe/0x650 init/main.c:1296
do_initcall_level init/main.c:1369 [inline]
do_initcalls init/main.c:1385 [inline]
do_basic_setup init/main.c:1404 [inline]
kernel_init_freeable+0x6b1/0x73a init/main.c:1611
kernel_init+0x1a/0x1d0 init/main.c:1500
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
CR2: ffffdc000000000f
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:68 [inline]
RIP: 0010:kernfs_new_node fs/kernfs/dir.c:655 [inline]
RIP: 0010:kernfs_create_dir_ns+0x7a/0x220 fs/kernfs/dir.c:1010
Code: 89 4c 24 04 4d 85 e4 4c 0f 44 e3 e8 80 25 7f ff 8b 4c 24 04 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 78 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 01 00 00 49 8b 7c 24 78 45 89 f9 6a 01 41 89
RSP: 0000:ffffc9000027fb38 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff888016ffb0e8 RCX: 00000000000041ed
RDX: 1fffe0000000000f RSI: ffffffff81fc1040 RDI: ffff000000000078
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888147771400
R10: ffffed10281e6c62 R11: 0000000000000000 R12: ffff000000000000
R13: ffffffff8a90b800 R14: ffff888147771400 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffdc000000000f CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 4c 24 04 mov %ecx,0x4(%rsp)
4: 4d 85 e4 test %r12,%r12
7: 4c 0f 44 e3 cmove %rbx,%r12
b: e8 80 25 7f ff callq 0xff7f2590
10: 8b 4c 24 04 mov 0x4(%rsp),%ecx
14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1b: fc ff df
1e: 49 8d 7c 24 78 lea 0x78(%r12),%rdi
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 4d 01 00 00 jne 0x181
34: 49 8b 7c 24 78 mov 0x78(%r12),%rdi
39: 45 89 f9 mov %r15d,%r9d
3c: 6a 01 pushq $0x1
3e: 41 rex.B
3f: 89 .byte 0x89
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
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