Re: [syzbot] KASAN: use-after-free Read in kernfs_next_descendant_post (2)
From: syzbot
Date: Thu Oct 20 2022 - 23:45:45 EST
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
her
[ 5.597695][ T1] NFS: Registering the id_resolver key type
[ 5.599149][ T1] Key type id_resolver registered
[ 5.600622][ T1] Key type id_legacy registered
[ 5.601685][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 5.602778][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 5.611543][ T1] Key type cifs.spnego registered
[ 5.613253][ T1] Key type cifs.idmap registered
[ 5.614650][ T1] ntfs: driver 2.1.32 [Flags: R/W].
[ 5.616739][ T1] ntfs3: Max link count 4000
[ 5.617506][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 5.618484][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 5.621078][ T1] efs: 1.0a - http://aeschi.ch.eu.org/efs/
[ 5.622255][ T1] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 5.626600][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 5.628348][ T1] QNX4 filesystem 0.2.3 registered.
[ 5.630193][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 5.632221][ T1] fuse: init (API version 7.37)
[ 5.636288][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 5.637940][ T1] orangefs_init: module version upstream loaded
[ 5.639824][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 5.653813][ T1] SGI XFS with ACLs, security attributes, realtime, quota, fatal assert, debug enabled
[ 5.666765][ T1] 9p: Installing v9fs 9p2000 file system support
[ 5.669394][ T1] NILFS version 2 loaded
[ 5.670723][ T1] befs: version: 0.9.3
[ 5.672670][ T1] ocfs2: Registered cluster interface o2cb
[ 5.674777][ T1] ocfs2: Registered cluster interface user
[ 5.676600][ T1] OCFS2 User DLM kernel interface loaded
[ 5.687111][ T1] gfs2: GFS2 installed
[ 5.698581][ T1] ceph: loaded (mds proto 32)
[ 5.710024][ T1] NET: Registered PF_ALG protocol family
[ 5.711181][ T1] xor: automatically using best checksumming function avx
[ 5.712855][ T1] async_tx: api initialized (async)
[ 5.714028][ T1] Key type asymmetric registered
[ 5.714899][ T1] Asymmetric key parser 'x509' registered
[ 5.715986][ T1] Asymmetric key parser 'pkcs8' registered
[ 5.716969][ T1] Key type pkcs7_test registered
[ 5.720754][ T1] alg: self-tests for CTR-KDF (hmac(sha256)) passed
[ 5.721886][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 240)
[ 5.723595][ T1] io scheduler mq-deadline registered
[ 5.725006][ T1] io scheduler kyber registered
[ 5.726238][ T1] io scheduler bfq registered
[ 5.733302][ T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 5.760627][ T1] ACPI: button: Power Button [PWRF]
[ 5.763071][ T1] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 5.765552][ T1] ACPI: button: Sleep Button [SLPF]
[ 5.785152][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 5.786468][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 5.800106][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 5.801283][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 5.818083][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 5.819227][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 6.139234][ T1] N_HDLC line discipline registered with maxframe=4096
[ 6.143191][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 6.145743][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 6.153400][ T1] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 6.158094][ T1] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 6.164827][ T1] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 6.173085][ T1] Non-volatile memory driver v1.3
[ 6.191613][ T1] Linux agpgart interface v0.103
[ 6.194194][ T1] ACPI: bus type drm_connector registered
[ 6.199163][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[ 6.204590][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
[ 6.264084][ T1] Console: switching to colour frame buffer device 128x48
[ 6.281271][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 6.282951][ T1] usbcore: registered new interface driver udl
[ 6.331971][ T1] brd: module loaded
[ 6.381966][ T1] loop: module loaded
[ 6.450450][ T1] zram: Added device: zram0
[ 6.456807][ T1] null_blk: disk nullb0 created
[ 6.457559][ T1] null_blk: module loaded
[ 6.458703][ T1] Guest personality initialized and is inactive
[ 6.460362][ T1] VMCI host device registered (name=vmci, major=10, minor=119)
[ 6.461772][ T1] Initialized host personality
[ 6.463064][ T1] usbcore: registered new interface driver rtsx_usb
[ 6.464912][ T1] usbcore: registered new interface driver viperboard
[ 6.466543][ T1] usbcore: registered new interface driver dln2
[ 6.468098][ T1] usbcore: registered new interface driver pn533_usb
[ 6.472749][ T1] nfcsim 0.2 initialized
[ 6.473704][ T1] usbcore: registered new interface driver port100
[ 6.475083][ T1] usbcore: registered new interface driver nfcmrvl
[ 6.478962][ T1] Loading iSCSI transport class v2.0-870.
[ 6.507427][ T1] scsi host0: Virtio SCSI HBA
[ 6.546621][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 6.549977][ T91] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
[ 6.577518][ T1] Rounding down aligned max_sectors from 4294967295 to 4294967288
[ 6.579716][ T1] db_root: cannot open: /etc/target
[ 6.581597][ T1] slram: not enough parameters.
[ 6.589382][ T1] ftl_cs: FTL header not found.
[ 6.626146][ T1] wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
[ 6.627700][ T1] wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved.
[ 6.637162][ T1] eql: Equalizer2002: Simon Janes (simon@xxxxxxx) and David S. Miller (davem@xxxxxxxxxx)
[ 6.647509][ T1] MACsec IEEE 802.1AE
[ 6.657940][ T1] tun: Universal TUN/TAP device driver, 1.6
[ 6.715241][ T1] ------------[ cut here ]------------
[ 6.716632][ T1] WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 __netif_set_xps_queue+0x88e/0x1f30
[ 6.718427][ T1] Modules linked in:
[ 6.719252][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc1-syzkaller-00025-gaae703b02f92-dirty #0
[ 6.721441][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 6.723065][ T1] RIP: 0010:__netif_set_xps_queue+0x88e/0x1f30
[ 6.724387][ T1] Code: fa 48 c7 c2 a0 a8 f4 8a be 2e 0a 00 00 48 c7 c7 40 a7 f4 8a c6 05 a2 69 74 06 01 e8 f2 e3 f1 01 e9 ef fd ff ff e8 e2 ae 24 fa <0f> 0b e9 8e fa ff ff 8b 6c 24 38 e8 d2 ae 24 fa 49 8d 7c 24 04 48
[ 6.727854][ T1] RSP: 0018:ffffc90000067898 EFLAGS: 00010293
[ 6.728833][ T1] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
[ 6.731435][ T1] RDX: ffff88813fe50000 RSI: ffffffff8757dc0e RDI: 0000000000000004
[ 6.734156][ T1] RBP: 0000000000000002 R08: 0000000000000004 R09: 0000000000000002
[ 6.735691][ T1] R10: 0000000000000002 R11: 000000000008c07e R12: ffff88801fb48680
[ 6.737253][ T1] R13: 0000000000000003 R14: ffff88801fb48698 R15: 0000000000000002
[ 6.738658][ T1] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
[ 6.740493][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.741783][ T1] CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 0000000000350ef0
[ 6.743162][ T1] Call Trace:
[ 6.744268][ T1] <TASK>
[ 6.744948][ T1] ? vp_bus_name+0xc0/0xc0
[ 6.745802][ T1] virtnet_set_affinity+0x4f0/0x750
[ 6.746726][ T1] ? skb_recv_done+0x120/0x120
[ 6.747533][ T1] virtnet_probe+0x12ae/0x31e0
[ 6.748436][ T1] ? virtnet_find_vqs+0xc30/0xc30
[ 6.749270][ T1] virtio_dev_probe+0x577/0x870
[ 6.750252][ T1] ? virtio_features_ok+0x1e0/0x1e0
[ 6.751234][ T1] really_probe+0x249/0xb90
[ 6.752007][ T1] __driver_probe_device+0x1df/0x4d0
[ 6.752884][ T1] driver_probe_device+0x4c/0x1a0
[ 6.753955][ T1] __driver_attach+0x1d0/0x550
[ 6.754899][ T1] ? __device_attach_driver+0x2e0/0x2e0
[ 6.756222][ T1] bus_for_each_dev+0x147/0x1d0
[ 6.756970][ T1] ? subsys_dev_iter_exit+0x20/0x20
[ 6.758183][ T1] bus_add_driver+0x4c9/0x640
[ 6.759241][ T1] driver_register+0x220/0x3a0
[ 6.760270][ T1] ? veth_init+0x11/0x11
[ 6.761196][ T1] virtio_net_driver_init+0x93/0xd2
[ 6.762104][ T1] do_one_initcall+0x13d/0x780
[ 6.763172][ T1] ? trace_event_raw_event_initcall_level+0x1f0/0x1f0
[ 6.764469][ T1] ? parameq+0x140/0x170
[ 6.765271][ T1] kernel_init_freeable+0x6ff/0x788
[ 6.766089][ T1] ? rest_init+0x270/0x270
[ 6.766807][ T1] kernel_init+0x1a/0x1d0
[ 6.767976][ T1] ? rest_init+0x270/0x270
[ 6.768818][ T1] ret_from_fork+0x1f/0x30
[ 6.770003][ T1] </TASK>
[ 6.770460][ T1] Kernel panic - not syncing: panic_on_warn set ...
[ 6.771442][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc1-syzkaller-00025-gaae703b02f92-dirty #0
[ 6.773956][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 6.776134][ T1] Call Trace:
[ 6.776861][ T1] <TASK>
[ 6.777450][ T1] dump_stack_lvl+0xcd/0x134
[ 6.779001][ T1] panic+0x2c8/0x622
[ 6.779782][ T1] ? panic_print_sys_info.part.0+0x110/0x110
[ 6.781025][ T34] sd 0:0:1:0: [sda] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB)
[ 6.781062][ T34] sd 0:0:1:0: [sda] 4096-byte physical blocks
[ 6.781197][ T34] sd 0:0:1:0: [sda] Write Protect is off
[ 6.781220][ T34] sd 0:0:1:0: [sda] Mode Sense: 1f 00 00 08
[ 6.781450][ T34] sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 6.787778][ T1] ? __warn.cold+0x24b/0x350
[ 6.789536][ T91] sd 0:0:1:0: Attached scsi generic sg0 type 0
[ 6.790433][ T1] ? __netif_set_xps_queue+0x88e/0x1f30
[ 6.790433][ T1] __warn.cold+0x25c/0x350
[ 6.790433][ T1] ? __netif_set_xps_queue+0x88e/0x1f30
[ 6.790433][ T1] report_bug+0x1bc/0x210
[ 6.790433][ T1] handle_bug+0x3c/0x70
[ 6.794504][ T34] sda: sda1
[ 6.795927][ T34] sd 0:0:1:0: [sda] Attached SCSI disk
[ 6.790433][ T1] exc_invalid_op+0x14/0x40
[ 6.790433][ T1] asm_exc_invalid_op+0x16/0x20
[ 6.799643][ T1] RIP: 0010:__netif_set_xps_queue+0x88e/0x1f30
[ 6.799643][ T1] Code: fa 48 c7 c2 a0 a8 f4 8a be 2e 0a 00 00 48 c7 c7 40 a7 f4 8a c6 05 a2 69 74 06 01 e8 f2 e3 f1 01 e9 ef fd ff ff e8 e2 ae 24 fa <0f> 0b e9 8e fa ff ff 8b 6c 24 38 e8 d2 ae 24 fa 49 8d 7c 24 04 48
[ 6.799643][ T1] RSP: 0018:ffffc90000067898 EFLAGS: 00010293
[ 6.799643][ T1] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
[ 6.799643][ T1] RDX: ffff88813fe50000 RSI: ffffffff8757dc0e RDI: 0000000000000004
[ 6.799643][ T1] RBP: 0000000000000002 R08: 0000000000000004 R09: 0000000000000002
[ 6.799643][ T1] R10: 0000000000000002 R11: 000000000008c07e R12: ffff88801fb48680
[ 6.799643][ T1] R13: 0000000000000003 R14: ffff88801fb48698 R15: 0000000000000002
[ 6.799643][ T1] ? __netif_set_xps_queue+0x88e/0x1f30
[ 6.799643][ T1] ? __netif_set_xps_queue+0x88e/0x1f30
[ 6.799643][ T1] ? vp_bus_name+0xc0/0xc0
[ 6.799643][ T1] virtnet_set_affinity+0x4f0/0x750
[ 6.799643][ T1] ? skb_recv_done+0x120/0x120
[ 6.799643][ T1] virtnet_probe+0x12ae/0x31e0
[ 6.799643][ T1] ? virtnet_find_vqs+0xc30/0xc30
[ 6.799643][ T1] virtio_dev_probe+0x577/0x870
[ 6.799643][ T1] ? virtio_features_ok+0x1e0/0x1e0
[ 6.799643][ T1] really_probe+0x249/0xb90
[ 6.799643][ T1] __driver_probe_device+0x1df/0x4d0
[ 6.799643][ T1] driver_probe_device+0x4c/0x1a0
[ 6.799643][ T1] __driver_attach+0x1d0/0x550
[ 6.799643][ T1] ? __device_attach_driver+0x2e0/0x2e0
[ 6.799643][ T1] bus_for_each_dev+0x147/0x1d0
[ 6.799643][ T1] ? subsys_dev_iter_exit+0x20/0x20
[ 6.799643][ T1] bus_add_driver+0x4c9/0x640
[ 6.799643][ T1] driver_register+0x220/0x3a0
[ 6.799643][ T1] ? veth_init+0x11/0x11
[ 6.829623][ T1] virtio_net_driver_init+0x93/0xd2
[ 6.829623][ T1] do_one_initcall+0x13d/0x780
[ 6.829623][ T1] ? trace_event_raw_event_initcall_level+0x1f0/0x1f0
[ 6.829623][ T1] ? parameq+0x140/0x170
[ 6.829623][ T1] kernel_init_freeable+0x6ff/0x788
[ 6.829623][ T1] ? rest_init+0x270/0x270
[ 6.829623][ T1] kernel_init+0x1a/0x1d0
[ 6.829623][ T1] ? rest_init+0x270/0x270
[ 6.829623][ T1] ret_from_fork+0x1f/0x30
[ 6.829623][ T1] </TASK>
[ 6.829623][ T1] Kernel Offset: disabled
[ 6.829623][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
GO111MODULE="auto"
GOARCH="amd64"
GOBIN=""
GOCACHE="/syzkaller/.cache/go-build"
GOENV="/syzkaller/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/syzkaller/jobs/linux/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/syzkaller/jobs/linux/gopath"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct";
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2307492022=/tmp/go-build -gno-record-gcc-switches"
git status (err=<nil>)
HEAD detached at b31320fc8
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:32: run command via tools/syz-env for best compatibility, see:
Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b31320fc8f3519e40494f64ebf77c13d16284bfd -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221018-073740'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b31320fc8f3519e40494f64ebf77c13d16284bfd -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221018-073740'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=b31320fc8f3519e40494f64ebf77c13d16284bfd -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221018-073740'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"b31320fc8f3519e40494f64ebf77c13d16284bfd\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=16f2e14a880000
Tested on:
commit: aae703b0 Merge tag 'for-6.1-rc1-tag' of git://git.kern..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=ea03ca45176080bc
dashboard link: https://syzkaller.appspot.com/bug?extid=6bc35f3913193fe7f0d3
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch: https://syzkaller.appspot.com/x/patch.diff?x=135783e6880000