PCI-DMA: Using software bounce buffering for IO (SWIOTLB) software IO TLB: mapped [mem 0x00000000bbffd000-0x00000000bfffd000] (64MB) RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb6c613963, max_idle_ns: 440795245426 ns clocksource: Switched to clocksource tsc Initialise system trusted keyrings workingset: timestamp_bits=40 max_order=21 bucket_order=0 NFS: Registering the id_resolver key type Key type id_resolver registered Key type id_legacy registered 9p: Installing v9fs 9p2000 file system support Key type asymmetric registered Asymmetric key parser 'x509' registered Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246) io scheduler mq-deadline registered io scheduler kyber registered usbcore: registered new interface driver udlfb usbcore: registered new interface driver smscufx input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 ACPI: button: Power Button [PWRF] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1 ACPI: button: Sleep Button [SLPF] ACPI: \_SB_.LNKC: Enabled at IRQ 11 virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver ACPI: \_SB_.LNKD: Enabled at IRQ 10 virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver ACPI: \_SB_.LNKB: Enabled at IRQ 10 virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A Non-volatile memory driver v1.3 Linux agpgart interface v0.103 ACPI: bus type drm_connector registered usbcore: registered new interface driver udl loop: module loaded usbcore: registered new interface driver rtsx_usb usbcore: registered new interface driver viperboard usbcore: registered new interface driver dln2 usbcore: registered new interface driver pn533_usb usbcore: registered new interface driver port100 usbcore: registered new interface driver nfcmrvl scsi host0: Virtio SCSI HBA scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6 sd 0:0:1:0: Attached scsi generic sg0 type 0 Rounding down aligned max_sectors from 4294967295 to 4294967288 db_root: cannot open: /etc/target BUG: unable to handle page fault for address: ffffdc0000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 100026067 P4D 100026067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc1-syzkaller-00028-g4dce3b375179 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:strlen+0x1a/0x90 lib/string.c:487 Code: e8 cb 25 53 ff 48 8b 74 24 08 48 8b 3c 24 eb c0 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 48 80 7d 00 00 RSP: 0000:ffffc9000001f578 EFLAGS: 00010296 RAX: dffffc0000000000 RBX: ffff88810e778008 RCX: 0000000000000000 RDX: 1fffe00000000000 RSI: ffff888100911800 RDI: ffff000000000000 RBP: ffff000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: ffffffffffffffec R11: 0000000000000000 R12: ffff88810cf4d600 R13: ffff88810cf4d600 R14: ffff888100911800 R15: ffff000000000000 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000000 CR3: 0000000007825000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __fortify_strlen include/linux/fortify-string.h:141 [inline] insert_entry fs/proc/proc_sysctl.c:164 [inline] insert_header+0x2c0/0xf90 fs/proc/proc_sysctl.c:259 __register_sysctl_table+0x6fb/0x10a0 fs/proc/proc_sysctl.c:1379 neigh_sysctl_register+0x2c8/0x5e0 net/core/neighbour.c:3821 devinet_sysctl_register+0xb1/0x230 net/ipv4/devinet.c:2623 inetdev_init+0x286/0x580 net/ipv4/devinet.c:279 inetdev_event+0xa85/0x1610 net/ipv4/devinet.c:1534 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] register_netdevice+0x1127/0x1680 net/core/dev.c:10103 virtnet_probe+0x1378/0x30f0 drivers/net/virtio_net.c:3929 virtio_dev_probe+0x577/0x870 drivers/virtio/virtio.c:305 call_driver_probe drivers/base/dd.c:530 [inline] really_probe+0x249/0xb90 drivers/base/dd.c:609 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:748 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:778 __driver_attach+0x223/0x550 drivers/base/dd.c:1150 bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:301 bus_add_driver+0x4c9/0x640 drivers/base/bus.c:618 driver_register+0x220/0x3a0 drivers/base/driver.c:240 virtio_net_driver_init+0x93/0xd2 drivers/net/virtio_net.c:4108 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+0x6ac/0x735 init/main.c:1611 kernel_init+0x1a/0x1d0 init/main.c:1500 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: CR2: ffffdc0000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:strlen+0x1a/0x90 lib/string.c:487 Code: e8 cb 25 53 ff 48 8b 74 24 08 48 8b 3c 24 eb c0 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 48 80 7d 00 00 RSP: 0000:ffffc9000001f578 EFLAGS: 00010296 RAX: dffffc0000000000 RBX: ffff88810e778008 RCX: 0000000000000000 RDX: 1fffe00000000000 RSI: ffff888100911800 RDI: ffff000000000000 RBP: ffff000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: ffffffffffffffec R11: 0000000000000000 R12: ffff88810cf4d600 R13: ffff88810cf4d600 R14: ffff888100911800 R15: ffff000000000000 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000000 CR3: 0000000007825000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 cb 25 53 ff callq 0xff5325d0 5: 48 8b 74 24 08 mov 0x8(%rsp),%rsi a: 48 8b 3c 24 mov (%rsp),%rdi e: eb c0 jmp 0xffffffd0 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 48 89 fa mov %rdi,%rdx 1d: 55 push %rbp 1e: 48 89 fd mov %rdi,%rbp 21: 48 c1 ea 03 shr $0x3,%rdx 25: 53 push %rbx 26: 48 83 ec 08 sub $0x8,%rsp * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 48 89 fa mov %rdi,%rdx 31: 83 e2 07 and $0x7,%edx 34: 38 d0 cmp %dl,%al 36: 7f 04 jg 0x3c 38: 84 c0 test %al,%al 3a: 75 48 jne 0x84 3c: 80 7d 00 00 cmpb $0x0,0x0(%rbp)