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Message-ID: <0000000000001081fc0606f52ed9@google.com>
Date: Thu, 05 Oct 2023 02:59:29 -0700
From: syzbot <syzbot+b42fe626038981fb7bfa@...kaller.appspotmail.com>
To: amir73il@...il.com, hdanton@...a.com,
linux-fsdevel@...r.kernel.org, linux-integrity@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-unionfs@...r.kernel.org, miklos@...redi.hu,
mszeredi@...hat.com, syzbot@...kalhler.appspotmail.com,
syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk,
zohar@...ux.ibm.com, zohar@...ibm.com
Subject: Re: [syzbot] [integrity] [overlayfs] possible deadlock in
mnt_want_write (2)
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
.11
[ 11.711476][ T1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 11.717652][ T1] Bluetooth: BNEP filters: protocol multicast
[ 11.723764][ T1] Bluetooth: BNEP socket layer initialized
[ 11.729798][ T1] Bluetooth: CMTP (CAPI Emulation) ver 1.0
[ 11.735800][ T1] Bluetooth: CMTP socket layer initialized
[ 11.741657][ T1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 11.748518][ T1] Bluetooth: HIDP socket layer initialized
[ 11.758808][ T1] NET: Registered PF_RXRPC protocol family
[ 11.764714][ T1] Key type rxrpc registered
[ 11.769426][ T1] Key type rxrpc_s registered
[ 11.774975][ T1] NET: Registered PF_KCM protocol family
[ 11.781399][ T1] lec:lane_module_init: lec.c: initialized
[ 11.787210][ T1] mpoa:atm_mpoa_init: mpc.c: initialized
[ 11.793325][ T1] l2tp_core: L2TP core driver, V2.0
[ 11.798593][ T1] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[ 11.804282][ T1] l2tp_ip: L2TP IP encapsulation support (L2TPv3)
[ 11.810911][ T1] l2tp_netlink: L2TP netlink interface
[ 11.816532][ T1] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
[ 11.823862][ T1] l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
[ 11.831528][ T1] NET: Registered PF_PHONET protocol family
[ 11.837777][ T1] 8021q: 802.1Q VLAN Support v1.8
[ 11.855888][ T1] DCCP: Activated CCID 2 (TCP-like)
[ 11.861493][ T1] DCCP: Activated CCID 3 (TCP-Friendly Rate Control)
[ 11.868489][ T1] DCCP is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
[ 11.879600][ T1] sctp: Hash tables configured (bind 32/56)
[ 11.886970][ T1] NET: Registered PF_RDS protocol family
[ 11.893414][ T1] Registered RDS/infiniband transport
[ 11.900057][ T1] Registered RDS/tcp transport
[ 11.904815][ T1] tipc: Activated (version 2.0.0)
[ 11.910959][ T1] NET: Registered PF_TIPC protocol family
[ 11.917541][ T1] tipc: Started in single node mode
[ 11.923606][ T1] NET: Registered PF_SMC protocol family
[ 11.929592][ T1] 9pnet: Installing 9P2000 support
[ 11.935356][ T1] NET: Registered PF_CAIF protocol family
[ 11.948223][ T1] NET: Registered PF_IEEE802154 protocol family
[ 11.954672][ T1] Key type dns_resolver registered
[ 11.959869][ T1] Key type ceph registered
[ 11.964886][ T1] libceph: loaded (mon/osd proto 15/24)
[ 11.971970][ T1] batman_adv: B.A.T.M.A.N. advanced 2023.3 (compatibility version 15) loaded
[ 11.981263][ T1] openvswitch: Open vSwitch switching datapath
[ 11.991164][ T1] NET: Registered PF_VSOCK protocol family
[ 11.997270][ T1] mpls_gso: MPLS GSO support
[ 12.019850][ T1] IPI shorthand broadcast: enabled
[ 12.025183][ T1] AVX2 version of gcm_enc/dec engaged.
[ 12.031096][ T1] AES CTR mode by8 optimization enabled
[ 13.986311][ T1] sched_clock: Marking stable (13940030159, 37368238)->(13987518566, -10120169)
[ 14.000622][ T1] registered taskstats version 1
[ 14.020069][ T1] Loading compiled-in X.509 certificates
[ 14.031543][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 2d553f2396bceba4be328de3fad0b481a51ca3cf'
[ 14.045807][ T1] zswap: loaded using pool lzo/zbud
[ 14.257081][ T1] debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers
[ 16.606589][ T1] Key type .fscrypt registered
[ 16.611425][ T1] Key type fscrypt-provisioning registered
[ 16.624007][ T1] kAFS: Red Hat AFS client v0.1 registering.
[ 16.646715][ T1] Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes
[ 16.656542][ T1] Key type big_key registered
[ 16.664108][ T1] Key type encrypted registered
[ 16.669211][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 16.675572][ T1] Loading compiled-in module X.509 certificates
[ 16.684589][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 2d553f2396bceba4be328de3fad0b481a51ca3cf'
[ 16.695647][ T1] ima: Allocated hash algorithm: sha256
[ 16.701654][ T1] ima: No architecture policies found
[ 16.707848][ T1] evm: Initialising EVM extended attributes:
[ 16.714189][ T1] evm: security.selinux (disabled)
[ 16.719369][ T1] evm: security.SMACK64
[ 16.723503][ T1] evm: security.SMACK64EXEC
[ 16.728365][ T1] evm: security.SMACK64TRANSMUTE
[ 16.733278][ T1] evm: security.SMACK64MMAP
[ 16.737801][ T1] evm: security.apparmor (disabled)
[ 16.742978][ T1] evm: security.ima
[ 16.746763][ T1] evm: security.capability
[ 16.751272][ T1] evm: HMAC attrs: 0x1
[ 16.757582][ T1] PM: Magic number: 11:141:828
[ 16.762692][ T1] video4linux v4l-touch6: hash matches
[ 16.768621][ T1] tty ptyt8: hash matches
[ 16.772947][ T1] tty ptyqb: hash matches
[ 16.779976][ T1] printk: console [netcon0] enabled
[ 16.785201][ T1] netconsole: network logging started
[ 16.791177][ T1] gtp: GTP module loaded (pdp ctx size 104 bytes)
[ 16.799026][ T1] rdma_rxe: loaded
[ 16.803522][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 16.814312][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 16.821808][ T1] clk: Disabling unused clocks
[ 16.822972][ T2520] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[ 16.826718][ T1] ALSA device list:
[ 16.836181][ T2520] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[ 16.849196][ T1] #0: Dummy 1
[ 16.852687][ T1] #1: Loopback 1
[ 16.856406][ T1] #2: Virtual MIDI Card 1
[ 16.864429][ T1] md: Waiting for all devices to be available before autodetect
[ 16.872287][ T1] md: If you don't use raid, use raid=noautodetect
[ 16.878935][ T1] md: Autodetecting RAID arrays.
[ 16.883975][ T1] md: autorun ...
[ 16.887676][ T1] md: ... autorun DONE.
[ 16.961157][ T1] EXT4-fs (sda1): mounted filesystem 5941fea2-f5fa-4b4e-b5ef-9af118b27b95 ro with ordered data mode. Quota mode: none.
[ 16.973957][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
[ 17.007193][ T1] devtmpfs: mounted
[ 17.026225][ T1] Freeing unused kernel image (initmem) memory: 2884K
[ 17.033318][ T1] Write protecting the kernel read-only data: 196608k
[ 17.044849][ T1] Freeing unused kernel image (rodata/data gap) memory: 1780K
[ 17.152701][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 17.165765][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[ 17.175611][ T1] Run /sbin/init as init process
[ 17.221897][ T1] ------------[ cut here ]------------
[ 17.227549][ T1] WARNING: CPU: 1 PID: 1 at security/integrity/iint.c:85 integrity_inode_get+0x499/0x580
[ 17.237529][ T1] Modules linked in:
[ 17.241431][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.6.0-rc4-syzkaller-00001-g79be50b1a644 #0
[ 17.251093][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
[ 17.261192][ T1] RIP: 0010:integrity_inode_get+0x499/0x580
[ 17.267086][ T1] Code: eb 11 e8 ba 30 8c fd 48 c7 c7 60 e4 92 8d e8 be 1e d6 06 4c 89 e0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 97 30 8c fd <0f> 0b 31 db e9 b0 fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c
[ 17.287095][ T1] RSP: 0000:ffffc900000678f0 EFLAGS: 00010293
[ 17.293214][ T1] RAX: ffffffff8401db19 RBX: 00000000ffffffff RCX: ffff888015e58000
[ 17.301239][ T1] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000001
[ 17.309277][ T1] RBP: ffff88801db8aad8 R08: ffffffff8401d8c4 R09: 0000000000000000
[ 17.317271][ T1] R10: ffff88802871d088 R11: ffffed10050e3a13 R12: ffff88802871d000
[ 17.325268][ T1] R13: ffff88802871d0d0 R14: dffffc0000000000 R15: ffff88801db8aab0
[ 17.333277][ T1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
[ 17.342239][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.348852][ T1] CR2: 0000000000000000 CR3: 000000000d130000 CR4: 00000000003506e0
[ 17.356912][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 17.364907][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 17.372924][ T1] Call Trace:
[ 17.376200][ T1] <TASK>
[ 17.379331][ T1] ? __warn+0x162/0x4a0
[ 17.383486][ T1] ? integrity_inode_get+0x499/0x580
[ 17.388813][ T1] ? report_bug+0x2b3/0x500
[ 17.393312][ T1] ? integrity_inode_get+0x499/0x580
[ 17.398712][ T1] ? handle_bug+0x3d/0x70
[ 17.403043][ T1] ? exc_invalid_op+0x1a/0x50
[ 17.407747][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 17.412768][ T1] ? integrity_inode_get+0x244/0x580
[ 17.418159][ T1] ? integrity_inode_get+0x499/0x580
[ 17.423885][ T1] ? integrity_inode_get+0x499/0x580
[ 17.429210][ T1] process_measurement+0x44d/0x1cf0
[ 17.434430][ T1] ? ima_file_mmap+0x2b0/0x2b0
[ 17.439238][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0
[ 17.445312][ T1] ? print_irqtrace_events+0x220/0x220
[ 17.450839][ T1] ? smack_current_getsecid_subj+0x22/0xf0
[ 17.456665][ T1] ima_bprm_check+0x128/0x2b0
[ 17.461376][ T1] ? ima_file_mprotect+0x630/0x630
[ 17.466596][ T1] ? tomoyo_bprm_check_security+0x157/0x170
[ 17.472718][ T1] ? bpf_lsm_bprm_check_security+0x9/0x10
[ 17.478532][ T1] bprm_execve+0x8c7/0x17c0
[ 17.483078][ T1] ? alloc_bprm+0x900/0x900
[ 17.487748][ T1] ? copy_string_kernel+0x1c9/0x1f0
[ 17.492960][ T1] kernel_execve+0x8ea/0xa10
[ 17.497605][ T1] ? rest_init+0x300/0x300
[ 17.502038][ T1] kernel_init+0xde/0x2a0
[ 17.506364][ T1] ret_from_fork+0x48/0x80
[ 17.510808][ T1] ? rest_init+0x300/0x300
[ 17.515229][ T1] ret_from_fork_asm+0x11/0x20
[ 17.520045][ T1] </TASK>
[ 17.523071][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 17.530373][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.6.0-rc4-syzkaller-00001-g79be50b1a644 #0
[ 17.540081][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
[ 17.550128][ T1] Call Trace:
[ 17.553400][ T1] <TASK>
[ 17.556320][ T1] dump_stack_lvl+0x1e7/0x2d0
[ 17.561004][ T1] ? nf_tcp_handle_invalid+0x650/0x650
[ 17.566476][ T1] ? panic+0x770/0x770
[ 17.570546][ T1] ? vscnprintf+0x5d/0x80
[ 17.574964][ T1] panic+0x30f/0x770
[ 17.578877][ T1] ? __warn+0x171/0x4a0
[ 17.583027][ T1] ? __memcpy_flushcache+0x2b0/0x2b0
[ 17.588307][ T1] ? ret_from_fork_asm+0x11/0x20
[ 17.593262][ T1] __warn+0x314/0x4a0
[ 17.597275][ T1] ? integrity_inode_get+0x499/0x580
[ 17.602597][ T1] report_bug+0x2b3/0x500
[ 17.606935][ T1] ? integrity_inode_get+0x499/0x580
[ 17.612218][ T1] handle_bug+0x3d/0x70
[ 17.616365][ T1] exc_invalid_op+0x1a/0x50
[ 17.620862][ T1] asm_exc_invalid_op+0x1a/0x20
[ 17.625711][ T1] RIP: 0010:integrity_inode_get+0x499/0x580
[ 17.631598][ T1] Code: eb 11 e8 ba 30 8c fd 48 c7 c7 60 e4 92 8d e8 be 1e d6 06 4c 89 e0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 97 30 8c fd <0f> 0b 31 db e9 b0 fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c
[ 17.651202][ T1] RSP: 0000:ffffc900000678f0 EFLAGS: 00010293
[ 17.657365][ T1] RAX: ffffffff8401db19 RBX: 00000000ffffffff RCX: ffff888015e58000
[ 17.665448][ T1] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000001
[ 17.673405][ T1] RBP: ffff88801db8aad8 R08: ffffffff8401d8c4 R09: 0000000000000000
[ 17.681392][ T1] R10: ffff88802871d088 R11: ffffed10050e3a13 R12: ffff88802871d000
[ 17.689449][ T1] R13: ffff88802871d0d0 R14: dffffc0000000000 R15: ffff88801db8aab0
[ 17.697440][ T1] ? integrity_inode_get+0x244/0x580
[ 17.702744][ T1] ? integrity_inode_get+0x499/0x580
[ 17.708088][ T1] process_measurement+0x44d/0x1cf0
[ 17.713299][ T1] ? ima_file_mmap+0x2b0/0x2b0
[ 17.718152][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0
[ 17.724212][ T1] ? print_irqtrace_events+0x220/0x220
[ 17.729771][ T1] ? smack_current_getsecid_subj+0x22/0xf0
[ 17.735568][ T1] ima_bprm_check+0x128/0x2b0
[ 17.740240][ T1] ? ima_file_mprotect+0x630/0x630
[ 17.745342][ T1] ? tomoyo_bprm_check_security+0x157/0x170
[ 17.751221][ T1] ? bpf_lsm_bprm_check_security+0x9/0x10
[ 17.756946][ T1] bprm_execve+0x8c7/0x17c0
[ 17.761458][ T1] ? alloc_bprm+0x900/0x900
[ 17.765952][ T1] ? copy_string_kernel+0x1c9/0x1f0
[ 17.771134][ T1] kernel_execve+0x8ea/0xa10
[ 17.775738][ T1] ? rest_init+0x300/0x300
[ 17.780153][ T1] kernel_init+0xde/0x2a0
[ 17.784472][ T1] ret_from_fork+0x48/0x80
[ 17.788876][ T1] ? rest_init+0x300/0x300
[ 17.793276][ T1] ret_from_fork_asm+0x11/0x20
[ 17.798036][ T1] </TASK>
[ 17.801282][ T1] Kernel Offset: disabled
[ 17.805673][ 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-2/linux/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/syzkaller/jobs-2/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="go1.20.1"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build3394607480=/tmp/go-build -gno-record-gcc-switches"
git status (err=<nil>)
HEAD detached at 0b6a67ac4
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=0b6a67ac4b0dc26f43030c5edd01c9175f13b784 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230913-073137'" "-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=0b6a67ac4b0dc26f43030c5edd01c9175f13b784 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230913-073137'" "-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=0b6a67ac4b0dc26f43030c5edd01c9175f13b784 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230913-073137'" "-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 -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"0b6a67ac4b0dc26f43030c5edd01c9175f13b784\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=137bc1b2680000
Tested on:
commit: 79be50b1 ima: annotate iint mutex to avoid lockdep fal..
git tree: https://github.com/amir73il/linux ima-ovl-fix
kernel config: https://syzkaller.appspot.com/x/.config?x=57da1ac039c4c78a
dashboard link: https://syzkaller.appspot.com/bug?extid=b42fe626038981fb7bfa
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
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