Hello,
syzbot tried to test the proposed patch but build/boot failed:
T1] devtmpfs: initialized
[ 2.873454][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.873454][ T1] futex hash table entries: 512 (order: 4, 65536
bytes, linear)
[ 2.875783][ T1] PM: RTC time: 21:05:06, date: 2019-07-24
[ 2.882105][ T1] NET: Registered protocol family 16
[ 2.886588][ T1] audit: initializing netlink subsys (disabled)
[ 2.888579][ T22] audit: type=2000 audit(1564002306.507:1):
state=initialized audit_enabled=0 res=1
[ 2.888579][ T1] cpuidle: using governor menu
[ 2.893505][ T1] ACPI: bus type PCI registered
[ 2.894935][ T1] PCI: Using configuration type 1 for base access
[ 3.002926][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated
0 pages
[ 3.003285][ T27] cryptomgr_test (27) used greatest stack depth: 30208
bytes left
[ 3.003285][ T29] kworker/u4:0 (29) used greatest stack depth: 27608
bytes left
[ 3.011409][ T43] kworker/u4:0 (43) used greatest stack depth: 27120
bytes left
[ 3.022044][ T1] ACPI: Added _OSI(Module Device)
[ 3.022884][ T1] ACPI: Added _OSI(Processor Device)
[ 3.023651][ T1] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 3.031207][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 3.031207][ T1] ACPI: Added _OSI(Linux-Dell-Video)
[ 3.031249][ T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 3.032156][ T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 3.082907][ T1] ACPI: 2 ACPI AML tables successfully acquired and
loaded
[ 3.097843][ T1] ACPI: Interpreter enabled
[ 3.098853][ T1] ACPI: (supports S0 S3 S4 S5)
[ 3.099590][ T1] ACPI: Using IOAPIC for interrupt routing
[ 3.100591][ T1] PCI: Using host bridge windows from ACPI; if
necessary, use "pci=nocrs" and report a bug
[ 3.104257][ T1] ACPI: Enabled 16 GPEs in block 00 to 0F
[ 3.182493][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus
00-ff])
[ 3.183851][ T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM
Segments MSI HPX-Type3]
[ 3.185519][ T1] acpi PNP0A03:00: fail to add MMCONFIG information,
can't access extended PCI configuration space under this bridge.
[ 3.192575][ T1] PCI host bridge to bus 0000:00
[ 3.193286][ T1] pci_bus 0000:00: root bus resource [io
0x0000-0x0cf7 window]
[ 3.194360][ T1] pci_bus 0000:00: root bus resource [io
0x0d00-0xffff window]
[ 3.195393][ T1] pci_bus 0000:00: root bus resource [mem
0x000a0000-0x000bffff window]
[ 3.196522][ T1] pci_bus 0000:00: root bus resource [mem
0xc0000000-0xfebfffff window]
[ 3.197715][ T1] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 3.198886][ T1] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
[ 3.204649][ T1] pci 0000:00:01.0: [8086:7110] type 00 class 0x060100
[ 3.222865][ T1] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
[ 3.241306][ T1] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed
by PIIX4 ACPI
[ 3.245348][ T1] pci 0000:00:03.0: [1af4:1004] type 00 class 0x000000
[ 3.251166][ T1] pci 0000:00:03.0: reg 0x10: [io 0xc000-0xc03f]
[ 3.255600][ T1] pci 0000:00:03.0: reg 0x14: [mem
0xfebfe000-0xfebfe07f]
[ 3.271694][ T1] pci 0000:00:04.0: [1af4:1000] type 00 class 0x020000
[ 3.277964][ T1] pci 0000:00:04.0: reg 0x10: [io 0xc040-0xc07f]
[ 3.283798][ T1] pci 0000:00:04.0: reg 0x14: [mem
0xfebff000-0xfebff07f]
[ 3.310020][ T1] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[ 3.314509][ T1] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[ 3.318340][ T1] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[ 3.322364][ T1] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[ 3.324796][ T1] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[ 3.332253][ T1] vgaarb: loaded
[ 3.333359][ T1] SCSI subsystem initialized
[ 3.334153][ T1] ACPI: bus type USB registered
[ 3.334153][ T1] usbcore: registered new interface driver usbfs
[ 3.334153][ T1] usbcore: registered new interface driver hub
[ 3.341195][ T1] usbcore: registered new device driver usb
[ 3.341471][ T1] mc: Linux media interface: v0.10
[ 3.342295][ T1] videodev: Linux video capture interface: v2.00
[ 3.343599][ T1] pps_core: LinuxPPS API ver. 1 registered
[ 3.344464][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <giometti@xxxxxxxx>
[ 3.345876][ T1] PTP clock support registered
[ 3.346781][ T1] EDAC MC: Ver: 3.0.0
[ 3.346781][ T1] Advanced Linux Sound Architecture Driver Initialized.
[ 3.346781][ T1] PCI: Using ACPI for IRQ routing
[ 3.353286][ T1] Bluetooth: Core ver 2.22
[ 3.354202][ T1] NET: Registered protocol family 31
[ 3.354955][ T1] Bluetooth: HCI device and connection manager
initialized
[ 3.355989][ T1] Bluetooth: HCI socket layer initialized
[ 3.356767][ T1] Bluetooth: L2CAP socket layer initialized
[ 3.357644][ T1] Bluetooth: SCO socket layer initialized
[ 3.358472][ T1] NET: Registered protocol family 8
[ 3.359220][ T1] NET: Registered protocol family 20
[ 3.360093][ T1] NetLabel: Initializing
[ 3.360715][ T1] NetLabel: domain hash size = 128
[ 3.361148][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 3.362492][ T1] NetLabel: unlabeled traffic allowed by default
[ 3.363724][ T1] nfc: nfc_init: NFC Core ver 0.1
[ 3.363724][ T1] NET: Registered protocol family 39
[ 3.365420][ T1] clocksource: Switched to clocksource kvm-clock
[ 4.371843][ T1] VFS: Disk quotas dquot_6.6.0
[ 4.372992][ T1] VFS: Dquot-cache hash table entries: 512 (order 0,
4096 bytes)
[ 4.374598][ T1] *** VALIDATE hugetlbfs ***
[ 4.376107][ T1] pnp: PnP ACPI init
[ 4.387313][ T1] pnp: PnP ACPI: found 7 devices
[ 4.413711][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 4.413717][ T1] thermal_sys: Registered thermal governor 'user_space'
[ 4.419892][ T1] clocksource: acpi_pm: mask: 0xffffff max_cycles:
0xffffff, max_idle_ns: 2085701024 ns
[ 4.422972][ T1] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7
window]
[ 4.424189][ T1] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff
window]
[ 4.425394][ T1] pci_bus 0000:00: resource 6 [mem
0x000a0000-0x000bffff window]
[ 4.426791][ T1] pci_bus 0000:00: resource 7 [mem
0xc0000000-0xfebfffff window]
[ 4.428947][ T1] NET: Registered protocol family 2
[ 4.431371][ T1] tcp_listen_portaddr_hash hash table entries: 4096
(order: 6, 294912 bytes, linear)
[ 4.433417][ T1] TCP established hash table entries: 65536 (order: 7,
524288 bytes, linear)
[ 4.435847][ T1] TCP bind hash table entries: 65536 (order: 10,
4194304 bytes, linear)
[ 4.443410][ T1] TCP: Hash tables configured (established 65536 bind
65536)
[ 4.445306][ T1] UDP hash table entries: 4096 (order: 7, 655360
bytes, linear)
[ 4.447824][ T1] UDP-Lite hash table entries: 4096 (order: 7, 655360
bytes, linear)
[ 4.450432][ T1] NET: Registered protocol family 1
[ 4.453345][ T1] RPC: Registered named UNIX socket transport module.
[ 4.454510][ T1] RPC: Registered udp transport module.
[ 4.455454][ T1] RPC: Registered tcp transport module.
[ 4.456446][ T1] RPC: Registered tcp NFSv4.1 backchannel transport
module.
[ 4.458621][ T1] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 4.459864][ T1] PCI: CLS 0 bytes, default 64
[ 4.461378][ T1] PCI-DMA: Using software bounce buffering for IO
(SWIOTLB)
[ 4.462761][ T1] software IO TLB: mapped [mem 0xbbffd000-0xbfffd000]
(64MB)
[ 4.466413][ T1] RAPL PMU: API unit is 2^-32 Joules, 0 fixed
counters, 10737418240 ms ovfl timer
[ 4.467994][ T1] clocksource: tsc: mask: 0xffffffffffffffff
max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns
[ 4.469791][ T1] clocksource: Switched to clocksource tsc
[ 4.473423][ T1] check: Scanning for low memory corruption every 60
seconds
[ 4.478343][ T1] Initialise system trusted keyrings
[ 4.479810][ T1] workingset: timestamp_bits=40 max_order=21
bucket_order=0
[ 4.521420][ T1] NFS: Registering the id_resolver key type
[ 4.522729][ T1] Key type id_resolver registered
[ 4.523526][ T1] Key type id_legacy registered
[ 4.524942][ T1] 9p: Installing v9fs 9p2000 file system support
[ 4.531784][ T1] Key type asymmetric registered
[ 4.532779][ T1] Asymmetric key parser 'x509' registered
[ 4.533772][ T1] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 247)
[ 4.535226][ T1] io scheduler mq-deadline registered
[ 4.536032][ T1] io scheduler kyber registered
[ 4.539777][ T1] usbcore: registered new interface driver udlfb
[ 4.541021][ T1] usbcore: registered new interface driver smscufx
[ 4.543014][ T1] input: Power Button as
/devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 4.544520][ T1] ACPI: Power Button [PWRF]
[ 4.545743][ T1] input: Sleep Button as
/devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 4.547129][ T1] ACPI: Sleep Button [SLPF]
[ 4.560609][ T1] PCI Interrupt Link [LNKC] enabled at IRQ 11
[ 4.562043][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for
legacy driver
[ 4.575190][ T1] PCI Interrupt Link [LNKD] enabled at IRQ 10
[ 4.576547][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for
legacy driver
[ 4.582237][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing
enabled
[ 4.606272][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud =
115200) is a 16550A
[ 4.631884][ T1] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud =
115200) is a 16550A
[ 4.656881][ T1] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud =
115200) is a 16550A
[ 4.682193][ T1] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud =
115200) is a 16550A
[ 4.687302][ T1] Non-volatile memory driver v1.3
[ 4.688815][ T1] Linux agpgart interface v0.103
[ 4.695497][ T1] usbcore: registered new interface driver udl
[ 4.719445][ T1] loop: module loaded
[ 4.721039][ T1] usbcore: registered new interface driver rtsx_usb
[ 4.723136][ T1] usbcore: registered new interface driver viperboard
[ 4.725065][ T1] usbcore: registered new interface driver dln2
[ 4.726853][ T1] usbcore: registered new interface driver pn533_usb
[ 4.729089][ T1] usbcore: registered new interface driver port100
[ 4.731604][ T1] usbcore: registered new interface driver nfcmrvl
[ 4.746210][ T1] scsi host0: Virtio SCSI HBA
[ 4.792288][ T1] kasan: CONFIG_KASAN_INLINE enabled
[ 4.793729][ T1] kasan: GPF could be caused by NULL-ptr deref or user
memory access
[ 4.795771][ T1] general protection fault: 0000 [#1] SMP KASAN
[ 4.797547][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1+
#1
[ 4.799786][ T1] Hardware name: Google Google Compute Engine/Google
Compute Engine, BIOS Google 01/01/2011
[ 4.801153][ T1] RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a
[ 4.801153][ T1] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1e
01 00 00 48 8b 9d 38 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1
ea 03 <80> 3c 02 00 0f 85 06 01 00 00 48 8d bd 48 03 00 00 48 8b 1b 48 b8
[ 4.801153][ T1] RSP: 0000:ffff8881da18f628 EFLAGS: 00010246
[ 4.801153][ T1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX:
ffffffff812d716c
[ 4.801153][ T1] RDX: 0000000000000000 RSI: ffffffff812d7189 RDI:
ffff8881d829fa78
[ 4.801153][ T1] RBP: ffff8881d829f740 R08: ffff8881da180000 R09:
ffffed103ad210cb
[ 4.801153][ T1] R10: ffffed103ad210ca R11: ffff8881d6908657 R12:
ffff8881d829f740
[ 4.801153][ T1] R13: ffff8881d76a57b0 R14: 0000000000000200 R15:
0000000000000000
[ 4.801153][ T1] FS: 0000000000000000(0000)
GS:ffff8881db300000(0000) knlGS:0000000000000000
[ 4.801153][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.801153][ T1] CR2: 0000000000000000 CR3: 0000000006a21000 CR4:
00000000001406e0
[ 4.801153][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 4.801153][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 4.801153][ T1] Call Trace:
[ 4.801153][ T1] dma_max_mapping_size+0xb5/0xf0
[ 4.801153][ T1] __scsi_init_queue+0x17e/0x510
[ 4.801153][ T1] scsi_mq_alloc_queue+0xcb/0x170
[ 4.801153][ T1] scsi_alloc_sdev+0x82e/0xc50
[ 4.801153][ T1] scsi_probe_and_add_lun+0x1ee5/0x2cd0
[ 4.801153][ T1] ? find_held_lock+0x2d/0x110
[ 4.801153][ T1] ? __pm_runtime_resume+0x111/0x180
[ 4.801153][ T1] ? scsi_alloc_sdev+0xc50/0xc50
[ 4.801153][ T1] ? mark_held_locks+0x9f/0xe0
[ 4.801153][ T1] ? _raw_spin_unlock_irqrestore+0x3e/0x50
[ 4.801153][ T1] ? lockdep_hardirqs_on+0x379/0x580
[ 4.801153][ T1] __scsi_scan_target+0x273/0xc30
[ 4.801153][ T1] ? find_held_lock+0x2d/0x110
[ 4.801153][ T1] ? __pm_runtime_resume+0x111/0x180
[ 4.801153][ T1] ? scsi_probe_and_add_lun+0x2cd0/0x2cd0
[ 4.801153][ T1] ? mark_lock+0xbc/0x1130
[ 4.801153][ T1] scsi_scan_channel.part.0+0x126/0x1a0
[ 4.801153][ T1] scsi_scan_host_selected+0x2bb/0x3f0
[ 4.801153][ T1] do_scsi_scan_host+0x1e8/0x260
[ 4.801153][ T1] scsi_scan_host+0x37c/0x440
[ 4.801153][ T1] virtscsi_probe+0x9b7/0xbb5
[ 4.801153][ T1] ? virtscsi_restore+0x240/0x240
[ 4.801153][ T1] virtio_dev_probe+0x463/0x710
[ 4.801153][ T1] ? virtio_device_restore+0x1f0/0x1f0
[ 4.801153][ T1] really_probe+0x281/0x650
[ 4.801153][ T1] driver_probe_device+0x101/0x1b0
[ 4.801153][ T1] device_driver_attach+0x108/0x140
[ 4.801153][ T1] __driver_attach+0xda/0x240
[ 4.801153][ T1] ? device_driver_attach+0x140/0x140
[ 4.801153][ T1] bus_for_each_dev+0x14b/0x1d0
[ 4.801153][ T1] ? subsys_dev_iter_exit+0x20/0x20
[ 4.801153][ T1] bus_add_driver+0x44e/0x5a0
[ 4.801153][ T1] driver_register+0x1c4/0x320
[ 4.801153][ T1] ? spi_transport_init+0x132/0x132
[ 4.801153][ T1] init+0xa1/0x115
[ 4.801153][ T1] do_one_initcall+0xf0/0x614
[ 4.801153][ T1] ? perf_trace_initcall_level+0x3e0/0x3e0
[ 4.801153][ T1] ? parameq+0x110/0x160
[ 4.801153][ T1] kernel_init_freeable+0x4a9/0x596
[ 4.801153][ T1] ? rest_init+0x371/0x371
[ 4.801153][ T1] kernel_init+0xd/0x1bf
[ 4.801153][ T1] ret_from_fork+0x24/0x30
[ 4.801153][ T1] Modules linked in:
[ 4.899360][ T1] ---[ end trace 6822302347232fe4 ]---
[ 4.900898][ T1] RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a
[ 4.902841][ T1] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1e
01 00 00 48 8b 9d 38 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1
ea 03 <80> 3c 02 00 0f 85 06 01 00 00 48 8d bd 48 03 00 00 48 8b 1b 48 b8
[ 4.908805][ T1] RSP: 0000:ffff8881da18f628 EFLAGS: 00010246
[ 4.910502][ T1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX:
ffffffff812d716c
[ 4.913042][ T1] RDX: 0000000000000000 RSI: ffffffff812d7189 RDI:
ffff8881d829fa78
[ 4.915172][ T1] RBP: ffff8881d829f740 R08: ffff8881da180000 R09:
ffffed103ad210cb
[ 4.917564][ T1] R10: ffffed103ad210ca R11: ffff8881d6908657 R12:
ffff8881d829f740
[ 4.919814][ T1] R13: ffff8881d76a57b0 R14: 0000000000000200 R15:
0000000000000000
[ 4.922373][ T1] FS: 0000000000000000(0000)
GS:ffff8881db300000(0000) knlGS:0000000000000000
[ 4.925294][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.927267][ T1] CR2: 0000000000000000 CR3: 0000000006a21000 CR4:
00000000001406e0
[ 4.929685][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 4.931826][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 4.934300][ T1] Kernel panic - not syncing: Fatal exception
[ 4.936582][ T1] Kernel Offset: disabled
[ 4.937961][ T1] Rebooting in 86400 seconds..
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=138cfa5c600000
Tested on:
commit: 1154c0b0 wip
git tree: https://github.com/google/kasan.git usb-fuzzer
kernel config: https://syzkaller.appspot.com/x/.config?x=b228fb19779df17d
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
patch: https://syzkaller.appspot.com/x/patch.diff?x=17678cc8600000
