Re: [syzbot] [net?] general protection fault in ip6_pol_route (3)

From: syzbot
Date: Fri Feb 07 2025 - 07:24:18 EST

Next message: Zhang Yi: "Re: [RFC PATCH v2 2/8] nvme: set BLK_FEAT_WRITE_ZEROES_UNMAP if device supports DEAC bit"
Previous message: Bence Csókás: "[PATCH resubmit2] spi: atmel-quadspi: remove references to runtime PM on error path"
In reply to: Hillf Danton: "Re: [syzbot] [net?] general protection fault in ip6_pol_route (3)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

x10
[ 85.293372][ C0] ? __pfx_fib6_rule_lookup+0x10/0x10
[ 85.295445][ C0] ? __local_bh_enable_ip+0x168/0x200
[ 85.297405][ C0] ? __pfx___local_bh_disable_ip+0x10/0x10
[ 85.299560][ C0] ? ip6t_do_table+0x205/0x18a0
[ 85.301398][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10
[ 85.303557][ C0] ip6_route_input+0x859/0xd90
[ 85.305331][ C0] ? __pfx_ip6_route_input+0x10/0x10
[ 85.307250][ C0] ? __pfx_lock_release+0x10/0x10
[ 85.309244][ C0] ? ip6_rcv_finish_core+0x20f/0x410
[ 85.311229][ C0] ip6_rcv_finish+0x144/0x180
[ 85.313088][ C0] ? __pfx_ip6_rcv_finish+0x10/0x10
[ 85.315021][ C0] NF_HOOK+0x3a4/0x450
[ 85.316743][ C0] ? skb_orphan+0x4b/0xd0
[ 85.318409][ C0] ? NF_HOOK+0x9a/0x450
[ 85.320017][ C0] ? __pfx_NF_HOOK+0x10/0x10
[ 85.321814][ C0] ? __pfx_ip6_rcv_finish+0x10/0x10
[ 85.323622][ C0] ? __pfx_ipv6_rcv+0x10/0x10
[ 85.325252][ C0] __netif_receive_skb+0x1ea/0x650
[ 85.327108][ C0] ? __pfx_lock_acquire+0x10/0x10
[ 85.329035][ C0] ? __pfx___netif_receive_skb+0x10/0x10
[ 85.331023][ C0] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 85.333914][ C0] ? __pfx_lock_release+0x10/0x10
[ 85.336388][ C0] ? _raw_spin_lock_irq+0xdf/0x120
[ 85.338749][ C0] process_backlog+0x662/0x15b0
[ 85.340660][ C0] ? process_backlog+0x33b/0x15b0
[ 85.342593][ C0] ? __pfx_process_backlog+0x10/0x10
[ 85.344774][ C0] ? lockdep_hardirqs_on_prepare+0x43d/0x780
[ 85.346950][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 85.349327][ C0] ? trace_rcu_utilization+0x4b/0x1e0
[ 85.351372][ C0] __napi_poll+0xcb/0x490
[ 85.353054][ C0] net_rx_action+0x89b/0x1240
[ 85.354900][ C0] ? __pfx_net_rx_action+0x10/0x10
[ 85.356826][ C0] ? do_softirq+0x11b/0x1e0
[ 85.358585][ C0] ? __pfx_lockdep_softirqs_off+0x10/0x10
[ 85.360701][ C0] ? lockdep_softirqs_on+0x334/0x5a0
[ 85.362790][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 85.365259][ C0] handle_softirqs+0x2d4/0x9b0
[ 85.367051][ C0] ? __pfx_handle_softirqs+0x10/0x10
[ 85.369207][ C0] ? do_softirq+0x11b/0x1e0
[ 85.371014][ C0] ? __pfx_handle_softirqs+0x10/0x10
[ 85.373108][ C0] do_softirq+0x11b/0x1e0
[ 85.374820][ C0] </IRQ>
[ 85.375942][ C0] <TASK>
[ 85.377044][ C0] ? __pfx_do_softirq+0x10/0x10
[ 85.378934][ C0] ? __pfx_lockdep_softirqs_on+0x10/0x10
[ 85.381010][ C0] ? rcu_is_watching+0x15/0xb0
[ 85.382747][ C0] __local_bh_enable_ip+0x1bb/0x200
[ 85.384669][ C0] ? dev_hard_start_xmit+0x768/0x7d0
[ 85.386628][ C0] ? __dev_queue_xmit+0x2f4/0x3f50
[ 85.388554][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10
[ 85.390696][ C0] ? __dev_queue_xmit+0x2f4/0x3f50
[ 85.392723][ C0] __dev_queue_xmit+0x1775/0x3f50
[ 85.394645][ C0] ? __dev_queue_xmit+0x2f4/0x3f50
[ 85.396618][ C0] ? __pfx___dev_queue_xmit+0x10/0x10
[ 85.398643][ C0] ? neigh_resolve_output+0x450/0x740
[ 85.400773][ C0] ? read_seqbegin+0x15a/0x2c0
[ 85.402609][ C0] ? lockdep_hardirqs_on+0x99/0x150
[ 85.404653][ C0] ? read_seqbegin+0x200/0x2c0
[ 85.406474][ C0] ? __pfx_read_seqbegin+0x10/0x10
[ 85.408532][ C0] ? neigh_resolve_output+0x2e5/0x740
[ 85.410658][ C0] ? eth_header+0x11c/0x1f0
[ 85.412483][ C0] ? __asan_memcpy+0x40/0x70
[ 85.414215][ C0] ? eth_header+0x11c/0x1f0
[ 85.415980][ C0] ? __pfx_eth_header+0x10/0x10
[ 85.417875][ C0] ? neigh_resolve_output+0x61f/0x740
[ 85.419858][ C0] ip6_finish_output2+0x12ad/0x1780
[ 85.421764][ C0] ? ip6_finish_output2+0x61d/0x1780
[ 85.423624][ C0] ? __pfx_ip6_finish_output2+0x10/0x10
[ 85.425794][ C0] ? ip6_mtu+0x81/0x3f0
[ 85.427425][ C0] ip6_finish_output+0x41e/0x840
[ 85.429249][ C0] ndisc_send_skb+0xb30/0x1450
[ 85.431073][ C0] ? ndisc_send_skb+0x563/0x1450
[ 85.432980][ C0] ? __pfx_ndisc_send_skb+0x10/0x10
[ 85.434944][ C0] ? __pfx_dst_output+0x10/0x10
[ 85.436614][ C0] ? __pfx_ndisc_ns_create+0x10/0x10
[ 85.438567][ C0] ndisc_send_ns+0xcc/0x160
[ 85.440339][ C0] ? __pfx_ndisc_send_ns+0x10/0x10
[ 85.442326][ C0] addrconf_dad_work+0xb2d/0x16a0
[ 85.444358][ C0] ? __pfx_addrconf_dad_work+0x10/0x10
[ 85.446504][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 85.449024][ C0] ? process_scheduled_works+0x976/0x1840
[ 85.451074][ C0] process_scheduled_works+0xa66/0x1840
[ 85.453146][ C0] ? __pfx_process_scheduled_works+0x10/0x10
[ 85.455426][ C0] ? assign_work+0x364/0x3d0
[ 85.457174][ C0] worker_thread+0x870/0xd30
[ 85.458768][ C0] ? _raw_spin_unlock_irqrestore+0xdd/0x140
[ 85.460971][ C0] ? __kthread_parkme+0x169/0x1d0
[ 85.463125][ C0] ? __pfx_worker_thread+0x10/0x10
[ 85.465052][ C0] kthread+0x7a9/0x920
[ 85.466620][ C0] ? __pfx_kthread+0x10/0x10
[ 85.468429][ C0] ? __pfx_worker_thread+0x10/0x10
[ 85.470430][ C0] ? __pfx_kthread+0x10/0x10
[ 85.472221][ C0] ? __pfx_kthread+0x10/0x10
[ 85.474017][ C0] ? __pfx_kthread+0x10/0x10
[ 85.475890][ C0] ? _raw_spin_unlock_irq+0x23/0x50
[ 85.478015][ C0] ? lockdep_hardirqs_on+0x99/0x150
[ 85.480047][ C0] ? __pfx_kthread+0x10/0x10
[ 85.482033][ C0] ret_from_fork+0x4b/0x80
[ 85.483827][ C0] ? __pfx_kthread+0x10/0x10
[ 85.485729][ C0] ret_from_fork_asm+0x1a/0x30
[ 85.487633][ C0] </TASK>
[ 85.488903][ C0] Modules linked in:
[ 85.490457][ C0] ---[ end trace 0000000000000000 ]---
[ 85.492579][ C0] RIP: 0010:find_match+0xae/0xc10
[ 85.494566][ C0] Code: 08 48 89 df e8 e3 e9 96 f7 4c 89 64 24 40 48 89 d8 bb c0 00 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 b4 e9 96 f7 4c 8b 23 e8 4c 03 5d 01
[ 85.501822][ C0] RSP: 0018:ffffc90000006fe0 EFLAGS: 00010206
[ 85.504104][ C0] RAX: 0000000000000018 RBX: 00000000000000c0 RCX: dffffc0000000000
[ 85.507165][ C0] RDX: ffff888030f02440 RSI: 0000000000000000 RDI: 0000000000000000
[ 85.510121][ C0] RBP: ffffffff9a7a0878 R08: ffffffff8a8f0c7f R09: ffffc90000007310
[ 85.514048][ C0] R10: ffffc90000007300 R11: fffff52000000e2e R12: ffffc90000007310
[ 85.517299][ C0] R13: ffffffff9a7a088f R14: 1ffffffff34f4111 R15: 1ffffffff34f410f
[ 85.520785][ C0] FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
[ 85.525167][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 85.527695][ C0] CR2: 00007feee96c6ff8 CR3: 0000000034810000 CR4: 0000000000352ef0
[ 85.530980][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 85.534129][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 85.537267][ C0] Kernel panic - not syncing: Fatal exception in interrupt
[ 85.540414][ C0] Kernel Offset: disabled
[ 85.542267][ C0] Rebooting in 86400 seconds..

VM DIAGNOSIS:
12:22:51 Registers:
info registers vcpu 0

CPU#0
RAX=0000000000000030 RBX=ffffffff9a718760 RCX=0000000000000000 RDX=00000000000003f8
RSI=0000000000000000 RDI=0000000000000020 RBP=0000000000000000 RSP=ffffc90000006710
R8 =ffffffff856cbcab R9 =1ffff11003de2046 R10=dffffc0000000000 R11=ffffffff856cbc60
R12=dffffc0000000000 R13=0000000000000030 R14=0000000000000030 R15=00000000000003f8
RIP=ffffffff856cbcde 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 ffff88801fc00000 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=00007feee96c6ff8 CR3=0000000034810000 CR4=00352ef0
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=0000000004040101 Opmask01=00000000011000f0 Opmask02=000000000fffffff Opmask03=0000000000000000
Opmask04=0000000000000000 Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000
ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007ffd92f51ba0 0000003000000010
ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007ffd92f51ba0 0000003000000010
ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 2e2e2e2e2e2e2e2e 2e2e2e2e2e2e2e2e
ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ff00ff00ffffffff ffff000000000000
ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000000ffffffff00 ff00ff00ff00ff00
ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ff00ff00ffffffff ffff000000000000
ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
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 0000000000000000 0000000000000000
ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2525252525252525 2525252525252525 2525252525252525 2525252525252525
ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 5548474900000000 0000000000000000 0000000000000000 0000000000000000
ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 5548474953004d52 4c4147495300424b 4c56444049405700 4d52455447495300
ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000031 0000000000000000 326874652f74656e 2f306d6973766564
ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000000000b1 00005632511b3700 00316e6170772f74 656e2f317968702f
ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000021 0000000000000000 00005632347d9233 73656d5f70636864
ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 725f0f8b9df47661 72610ff5fbfb737f 65677773777dffff 7f7f7d7f75777965
ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0032343433636672 2000313633336366 722000676e697274 7320007865686e69
ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000021 0000000000000000 0000000000000031 0000726565666965
ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000021 0000000000000000 0000000000000031 00006d5f65636864
ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 bfbfbfbfbfbfbfbf bfbfbfbfbfbfbfbf bfbfbfbfbfbfbfbf bfbf2b313423342c
ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 262821df2e2e33df 3228df3232202b22 df312e232d2435bf 2324353124322431
ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 4141414141414141 4141414141414141 4141414141414141 4141414141414141
ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a 1a1a1a1a1a1a1a1a
ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 2020202020202020 2020202020202020 2020202020202020 2020202020202020

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=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.7'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/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 -ffile-prefix-map=/tmp/go-build2809212995=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 4dfba277487
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}}' ./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
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
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=4dfba277487a7023ab9f5783302da4a9b5e9bef8 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241113-111659'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"4dfba277487a7023ab9f5783302da4a9b5e9bef8\"
/usr/bin/ld: /tmp/cc1rmchH.o: in function `test_cover_filter()':
executor.cc:(.text+0x1426b): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/cc1rmchH.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

Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=13448ca4580000

Tested on:

commit: bb066fe8 Merge tag 'pci-v6.14-fixes-2' of git://git.ke..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=d256a021904f1cd7
dashboard link: https://syzkaller.appspot.com/bug?extid=3201be560ebfa39bc6bd
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=1412f3df980000

Next message: Zhang Yi: "Re: [RFC PATCH v2 2/8] nvme: set BLK_FEAT_WRITE_ZEROES_UNMAP if device supports DEAC bit"
Previous message: Bence Csókás: "[PATCH resubmit2] spi: atmel-quadspi: remove references to runtime PM on error path"
In reply to: Hillf Danton: "Re: [syzbot] [net?] general protection fault in ip6_pol_route (3)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]