From: syzbot <syzbot+30b53487d00b4f7f0922@syzkaller.appspotmail.com>
To: dmantipov@yandex.ru, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in ocfs2_dx_dir_lookup_rec
Date: Tue, 28 Oct 2025 23:32:02 -0700 [thread overview]
Message-ID: <6901b4e2.a70a0220.5b2ed.0011.GAE@google.com> (raw)
In-Reply-To: <20251029062150.d06jg%dmantipov@yandex.ru>
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
67.405772][ T138] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 67.422310][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready
[ 67.428814][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[ 67.436709][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 67.444616][ T138] bridge0: port 2(bridge_slave_1) entered blocking state
[ 67.450434][ T138] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 67.457539][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready
[ 67.464951][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
[ 67.472504][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready
[ 67.479592][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 67.486473][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready
[ 67.495730][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 67.506916][ T5650] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 67.515281][ T5650] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 67.528862][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 67.536372][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 67.542979][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 67.557870][ T138] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 67.610902][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[ 67.617048][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[ 67.627882][ T5650] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 67.640213][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready
[ 67.654490][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
[ 67.662159][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
[ 67.668580][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
[ 67.677187][ T5650] device veth0_vlan entered promiscuous mode
[ 67.691806][ T5650] device veth1_vlan entered promiscuous mode
[ 67.706055][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready
[ 67.713533][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready
[ 67.720200][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
[ 67.729527][ T5650] device veth0_macvtap entered promiscuous mode
[ 67.749810][ T5650] device veth1_macvtap entered promiscuous mode
[ 67.761853][ T5650] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 67.767891][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
[ 67.776673][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
[ 67.784850][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
[ 67.793939][ T5650] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 67.801258][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
[ 67.808485][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
[ 67.817996][ T5650] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 67.828026][ T5650] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 67.835828][ T5650] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 67.843642][ T5650] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 67.857737][ T18] ================================================================================
[ 67.865522][ T18] UBSAN: signed-integer-overflow in ./arch/x86/include/asm/atomic.h:165:11
[ 67.872603][ T18] 995543531 + 1319321246 cannot be represented in type 'int'
[ 67.879702][ T18] CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0
[ 67.886045][ T18] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
[ 67.895362][ T18] Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
[ 67.901364][ T18] Call Trace:
[ 67.904328][ T18] dump_stack+0xfd/0x16e
[ 67.908005][ T18] ubsan_epilogue+0xa/0x30
[ 67.911778][ T18] handle_overflow+0x192/0x1b0
[ 67.915876][ T18] ? prandom_u32+0x217/0x260
[ 67.919849][ T18] ip_idents_reserve+0x14a/0x170
[ 67.924126][ T18] __ip_select_ident+0xe4/0x1c0
[ 67.928256][ T18] iptunnel_xmit+0x468/0x850
[ 67.932244][ T18] udp_tunnel_xmit_skb+0x1ba/0x290
[ 67.936638][ T18] send4+0x5d4/0xaf0
[ 67.939990][ T18] wg_socket_send_skb_to_peer+0xcd/0x1c0
[ 67.944630][ T18] wg_packet_handshake_send_worker+0x16b/0x280
[ 67.949906][ T18] process_one_work+0x85e/0xff0
[ 67.954046][ T18] worker_thread+0xa9b/0x1430
[ 67.958082][ T18] ? rcu_lock_release+0x20/0x20
[ 67.962220][ T18] kthread+0x386/0x410
[ 67.965686][ T18] ? rcu_lock_release+0x20/0x20
[ 67.969859][ T18] ? kthread_blkcg+0xd0/0xd0
[ 67.973836][ T18] ret_from_fork+0x1f/0x30
[ 67.977674][ T18] ================================================================================
[ 67.985359][ T18] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[ 67.991361][ T18] CPU: 0 PID: 18 Comm: kworker/u2:1 Not tainted syzkaller #0
[ 67.997465][ T18] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
[ 68.006318][ T18] Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
[ 68.012069][ T18] Call Trace:
[ 68.014829][ T18] dump_stack+0xfd/0x16e
[ 68.018379][ T18] panic+0x2f0/0x9c0
[ 68.021631][ T18] check_panic_on_warn+0x95/0xe0
[ 68.025741][ T18] handle_overflow+0x192/0x1b0
[ 68.029775][ T18] ? prandom_u32+0x217/0x260
[ 68.033699][ T18] ip_idents_reserve+0x14a/0x170
[ 68.037834][ T18] __ip_select_ident+0xe4/0x1c0
[ 68.042016][ T18] iptunnel_xmit+0x468/0x850
[ 68.045881][ T18] udp_tunnel_xmit_skb+0x1ba/0x290
[ 68.050153][ T18] send4+0x5d4/0xaf0
[ 68.053501][ T18] wg_socket_send_skb_to_peer+0xcd/0x1c0
[ 68.058253][ T18] wg_packet_handshake_send_worker+0x16b/0x280
[ 68.063426][ T18] process_one_work+0x85e/0xff0
[ 68.067469][ T18] worker_thread+0xa9b/0x1430
[ 68.071345][ T18] ? rcu_lock_release+0x20/0x20
[ 68.075396][ T18] kthread+0x386/0x410
[ 68.078889][ T18] ? rcu_lock_release+0x20/0x20
[ 68.083007][ T18] ? kthread_blkcg+0xd0/0xd0
[ 68.086908][ T18] ret_from_fork+0x1f/0x30
[ 68.090956][ T18] Kernel Offset: disabled
[ 68.094683][ T18] Rebooting in 86400 seconds..
VM DIAGNOSIS:
06:30:55 Registers:
info registers vcpu 0
CPU#0
RAX=0000000000000039 RBX=0000000000000039 RCX=0000000000000000 RDX=00000000000003f8
RSI=0000000000000000 RDI=0000000000000020 RBP=00000000000003f8 RSP=ffffc900004474e0
R8 =dffffc0000000000 R9 =fffff52000088e9e R10=fffff52000088e9e R11=ffffffff83f6a690
R12=dffffc0000000000 R13=1ffffffff2ad0463 R14=ffffffff9616bde0 R15=0000000000000000
RIP=ffffffff83f6a708 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 ffffffff 00c00000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0000 0000000000000000 ffffffff 00c00000
FS =0000 0000000000000000 ffffffff 00c00000
GS =0000 ffff888020600000 ffffffff 00c00000
LDT=0000 0000000000000000 ffffffff 00c00000
TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy
GDT= fffffe0000001000 0000007f
IDT= fffffe0000000000 00000fff
CR0=80050033 CR2=00005649c4ac8168 CR3=000000003cee0000 CR4=00350ef0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
Opmask00=0000000004222200 Opmask01=0000000000000fff Opmask02=00000000ffffffef Opmask03=0000000000000000
Opmask04=0000000000000000 Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000
ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 34c0e75a57eedab6 df075a43b3530442
ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 cd93e3d1997b1ad0 ac02d2502393cada
ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 739bb957f0df0046 e893118a65186997
ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 dcce5dad54d123ff 05ce08a3fac4eb3e
ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000ffffffff 00000000000000b4
ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000034
ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0ad426484b0072e0 3ee4763b2d2ad138
ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 542de23f41d7d499 0000000000000000
ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 64f818e79afcdfd0 39f02c83a206bdbb
ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 3caa366800000000 8c2d7c3421c3af63
ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2a1a2c77e3ec1418 ef53c166bcfc26d7
ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 5689bc5aba259e21 eb51e68077b68e8f
ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 a54ff53a3c6ef372 bb67ae856a09e667
ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 5be0cd191f83d9ab 9b05688c510e527f
ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2525252525252525 2525252525252525 2525252525252525 2525252525252525
ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 6c6c255b20642523 00202c0028732520 3e2d205d736d756c 6c255b2064252300
ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4949005b05410006 000509000d560005 1b08055d56485049 49005b0541000600
ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1854730157=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at 001c90610fb
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:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=001c90610fb2f2ac7cbbc9cd6af3f547b821a8ad -X github.com/google/syzkaller/prog.gitRevisionDate=20250926-171341" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=001c90610fb2f2ac7cbbc9cd6af3f547b821a8ad -X github.com/google/syzkaller/prog.gitRevisionDate=20250926-171341" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=001c90610fb2f2ac7cbbc9cd6af3f547b821a8ad -X github.com/google/syzkaller/prog.gitRevisionDate=20250926-171341" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -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 -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"001c90610fb2f2ac7cbbc9cd6af3f547b821a8ad\"
/usr/bin/ld: /tmp/ccDmF0ws.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=11583e7c580000
Tested on:
commit: d3d0b4e2 Linux 5.10.245
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y
kernel config: https://syzkaller.appspot.com/x/.config?x=7c6f4ecbfb251fb
dashboard link: https://syzkaller.appspot.com/bug?extid=30b53487d00b4f7f0922
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=145b6fe2580000
next parent reply other threads:[~2025-10-29 6:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20251029062150.d06jg%dmantipov@yandex.ru>
2025-10-29 6:32 ` syzbot [this message]
[not found] <20251029062739.-2Z1X%dmantipov@yandex.ru>
2025-10-29 8:59 ` [syzbot] [ocfs2?] KASAN: use-after-free Read in ocfs2_dx_dir_lookup_rec syzbot
[not found] <20251029062544.2my66%dmantipov@yandex.ru>
2025-10-29 7:27 ` syzbot
[not found] <20251028182245.3DboF%dmantipov@yandex.ru>
2025-10-28 19:32 ` syzbot
[not found] <20251028182008.x51jP%dmantipov@yandex.ru>
2025-10-28 18:52 ` syzbot
[not found] <20251028181926.Doh7s%dmantipov@yandex.ru>
2025-10-28 18:27 ` syzbot
[not found] <20251028104156.3QE-I%dmantipov@yandex.ru>
2025-10-28 10:45 ` syzbot
[not found] <20251028104117.mg9_S%dmantipov@yandex.ru>
2025-10-28 10:43 ` syzbot
[not found] <20251028104003.Vih0s%dmantipov@yandex.ru>
2025-10-28 10:41 ` syzbot
[not found] <20251024071529.h1Iuk%dmantipov@yandex.ru>
2025-10-24 9:37 ` syzbot
[not found] <20251024071518.JlvGX%dmantipov@yandex.ru>
2025-10-24 8:09 ` syzbot
[not found] <20251024071150.SJlVy%dmantipov@yandex.ru>
2025-10-24 7:22 ` syzbot
[not found] <20251022121231.xCumE%dmantipov@yandex.ru>
2025-10-22 12:55 ` syzbot
[not found] <f051f396-cc01-4d8e-a6db-22f7578b1499@yandex.ru>
2025-09-29 14:05 ` syzbot
2025-09-28 10:54 syzbot
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