Hello,
syzbot found the following crash on:
HEAD commit: 1154c0b0 wip
git tree: https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=1197774c600000
kernel config: https://syzkaller.appspot.com/x/.config?x=b228fb19779df17d
dashboard link: https://syzkaller.appspot.com/bug?extid=4efacf59126f1ae87000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+4efacf59126f1ae87000@xxxxxxxxxxxxxxxxxxxxxxxxx
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
pci 0000:00:00.0: Limiting direct PCI/PCI transfers
PCI: CLS 0 bytes, default 64
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
software IO TLB: mapped [mem 0xbbffd000-0xbfffd000] (64MB)
RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl
timer
clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x212735223b2,
max_idle_ns: 440795277976 ns
clocksource: Switched to clocksource tsc
check: Scanning for low memory corruption every 60 seconds
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 247)
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: Power Button [PWRF]
input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
ACPI: Sleep Button [SLPF]
PCI Interrupt Link [LNKC] enabled at IRQ 11
virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
PCI Interrupt Link [LNKD] enabled at IRQ 10
virtio-pci 0000:00:04.0: 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
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
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1+ #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:dma_addressing_limited /./include/linux/dma-mapping.h:692 [inline]
RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a /kernel/dma/direct.c:408
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
RSP: 0000:ffff8881da18f628 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff812d716c
RDX: 0000000000000000 RSI: ffffffff812d7189 RDI: ffff8881d7428378
RBP: ffff8881d7428040 R08: ffff8881da180000 R09: ffffed103ade30cb
R10: ffffed103ade30ca R11: ffff8881d6f18657 R12: ffff8881d7428040
R13: ffff8881d769e8b0 R14: 0000000000000200 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000006a21000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dma_max_mapping_size+0xb5/0xf0 /kernel/dma/mapping.c:375
__scsi_init_queue+0x17e/0x510 /drivers/scsi/scsi_lib.c:1787
scsi_mq_alloc_queue+0xcb/0x170 /drivers/scsi/scsi_lib.c:1833
scsi_alloc_sdev+0x82e/0xc50 /drivers/scsi/scsi_scan.c:269
scsi_probe_and_add_lun+0x1ee5/0x2cd0 /drivers/scsi/scsi_scan.c:1078
__scsi_scan_target+0x273/0xc30 /drivers/scsi/scsi_scan.c:1562
scsi_scan_channel.part.0+0x126/0x1a0 /drivers/scsi/scsi_scan.c:1650
scsi_scan_channel /drivers/scsi/scsi_scan.c:1677 [inline]
scsi_scan_host_selected+0x2bb/0x3f0 /drivers/scsi/scsi_scan.c:1679
do_scsi_scan_host /drivers/scsi/scsi_scan.c:1817 [inline]
do_scsi_scan_host+0x1e8/0x260 /drivers/scsi/scsi_scan.c:1807
scsi_scan_host /drivers/scsi/scsi_scan.c:1847 [inline]
scsi_scan_host+0x37c/0x440 /drivers/scsi/scsi_scan.c:1835
virtscsi_probe+0x9b7/0xbb5 /drivers/scsi/virtio_scsi.c:847
virtio_dev_probe+0x463/0x710 /drivers/virtio/virtio.c:248
really_probe+0x281/0x650 /drivers/base/dd.c:548
driver_probe_device+0x101/0x1b0 /drivers/base/dd.c:709
device_driver_attach+0x108/0x140 /drivers/base/dd.c:983
__driver_attach+0xda/0x240 /drivers/base/dd.c:1060
bus_for_each_dev+0x14b/0x1d0 /drivers/base/bus.c:304
bus_add_driver+0x44e/0x5a0 /drivers/base/bus.c:645
driver_register+0x1c4/0x320 /drivers/base/driver.c:170
__write_once_size /./include/linux/compiler.h:226 [inline]
INIT_LIST_HEAD /./include/linux/list.h:28 [inline]
init+0xa1/0x115 /drivers/char/virtio_console.c:2251
do_one_initcall+0xf0/0x614 /init/main.c:939
do_initcall_level /init/main.c:1007 [inline]
do_initcalls /init/main.c:1015 [inline]
do_basic_setup /init/main.c:1032 [inline]
kernel_init_freeable+0x4a9/0x596 /init/main.c:1192
kernel_init+0xd/0x1bf /init/main.c:1110
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 73ab592d53bc046f ]---
RIP: 0010:dma_addressing_limited /./include/linux/dma-mapping.h:692 [inline]
RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a /kernel/dma/direct.c:408
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
RSP: 0000:ffff8881da18f628 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff812d716c
RDX: 0000000000000000 RSI: ffffffff812d7189 RDI: ffff8881d7428378
RBP: ffff8881d7428040 R08: ffff8881da180000 R09: ffffed103ade30cb
R10: ffffed103ade30ca R11: ffff8881d6f18657 R12: ffff8881d7428040
R13: ffff8881d769e8b0 R14: 0000000000000200 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000006a21000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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