WARNING in register_net_sysctl
------------[ cut here ]------------
sysctl net/ipv4/ipfrag_low_thresh: data points to kernel global data: ipfrag_low_thresh_unused
WARNING: CPU: 1 PID: 5003 at net/sysctl_net.c:155 ensure_safe_net_sysctl net/sysctl_net.c:155 [inline]
WARNING: CPU: 1 PID: 5003 at net/sysctl_net.c:155 register_net_sysctl+0x207/0x3c0 net/sysctl_net.c:167
Modules linked in:
CPU: 1 PID: 5003 Comm: syz-executor.0 Not tainted 6.4.0-rc2-next-20230516-syzkaller-02748-g885df05bf634 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:ensure_safe_net_sysctl net/sysctl_net.c:155 [inline]
RIP: 0010:register_net_sysctl+0x207/0x3c0 net/sysctl_net.c:167
Code: 8b 43 f4 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 a9 01 00 00 48 8b 53 ec 4c 89 e9 4c 89 fe 48 c7 c7 c0 98 85 8b e8 69 13 7f f7 <0f> 0b 48 89 d8 48 c1 e8 03 0f b6 14 28 48 89 d8 83 e0 07 83 c0 01
RSP: 0018:ffffc9000431fbf8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88802b885854 RCX: 0000000000000000
RDX: ffff888025668000 RSI: ffffffff814bd247 RDI: 0000000000000001
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802b885848
R13: ffffffff8b859740 R14: 0000000000000000 R15: ffffffff8b69e220
FS: 00005555556f4400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005569b5bf6048 CR3: 0000000070ac2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip4_frags_ns_ctl_register net/ipv4/ip_fragment.c:618 [inline]
ipv4_frags_init_net net/ipv4/ip_fragment.c:689 [inline]
ipv4_frags_init_net+0x269/0x430 net/ipv4/ip_fragment.c:660
ops_init+0xb9/0x6b0 net/core/net_namespace.c:136
setup_net+0x5d1/0xc50 net/core/net_namespace.c:339
copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228
ksys_unshare+0x449/0x920 kernel/fork.c:3440
__do_sys_unshare kernel/fork.c:3511 [inline]
__se_sys_unshare kernel/fork.c:3509 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:3509
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f312268d687
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffccb2c92a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffccb2c98e8 RCX: 00007f312268d687
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00007ffccb2c9380 R14: 00007f31227ac9d8 R15: 000000000000000c
Warning: Permanently added '10.128.1.107' (ECDSA) to the list of known hosts.
2023/05/16 09:51:38 fuzzer started
2023/05/16 09:51:38 connecting to host at 10.128.0.169:46207
2023/05/16 09:51:38 checking machine...
2023/05/16 09:51:38 checking revisions...
2023/05/16 09:51:38 testing simple program...
syzkaller login: [ 61.471070][ T5000] cgroup: Unknown subsys name 'net'
[ 61.644574][ T5000] cgroup: Unknown subsys name 'rlimit'
[ 61.740753][ T4995] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4995 'syz-fuzzer'
[ 61.874427][ T5004] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 61.882874][ T5004] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 61.891021][ T5004] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 61.899600][ T5004] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 61.907341][ T5004] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[ 61.914726][ T5004] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 61.943805][ T5003] ------------[ cut here ]------------
[ 61.949385][ T5003] sysctl net/ipv4/ipfrag_low_thresh: data points to kernel global data: ipfrag_low_thresh_unused
[ 61.961327][ T5003] WARNING: CPU: 1 PID: 5003 at net/sysctl_net.c:155 register_net_sysctl+0x207/0x3c0
[ 61.970820][ T5003] Modules linked in:
[ 61.975019][ T5003] CPU: 1 PID: 5003 Comm: syz-executor.0 Not tainted 6.4.0-rc2-next-20230516-syzkaller-02748-g885df05bf634 #0
[ 61.987075][ T5003] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
[ 61.997394][ T5003] RIP: 0010:register_net_sysctl+0x207/0x3c0
[ 62.003530][ T5003] Code: 8b 43 f4 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 a9 01 00 00 48 8b 53 ec 4c 89 e9 4c 89 fe 48 c7 c7 c0 98 85 8b e8 69 13 7f f7 <0f> 0b 48 89 d8 48 c1 e8 03 0f b6 14 28 48 89 d8 83 e0 07 83 c0 01
[ 62.023310][ T5003] RSP: 0018:ffffc9000431fbf8 EFLAGS: 00010286
[ 62.029404][ T5003] RAX: 0000000000000000 RBX: ffff88802b885854 RCX: 0000000000000000
[ 62.037463][ T5003] RDX: ffff888025668000 RSI: ffffffff814bd247 RDI: 0000000000000001
[ 62.045592][ T5003] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
[ 62.053616][ T5003] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802b885848
[ 62.061604][ T5003] R13: ffffffff8b859740 R14: 0000000000000000 R15: ffffffff8b69e220
[ 62.069657][ T5003] FS: 00005555556f4400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
[ 62.078783][ T5003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 62.085445][ T5003] CR2: 00005569b5bf6048 CR3: 0000000070ac2000 CR4: 00000000003506e0
[ 62.093678][ T5003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 62.101663][ T5003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 62.109725][ T5003] Call Trace:
[ 62.113073][ T5003]
[ 62.116306][ T5003] ? ip4_frag_init+0x380/0x380
[ 62.121125][ T5003] ipv4_frags_init_net+0x269/0x430
[ 62.126317][ T5003] ops_init+0xb9/0x6b0
[ 62.130598][ T5003] setup_net+0x5d1/0xc50
[ 62.134905][ T5003] ? down_read_killable+0x14a/0x4f0
[ 62.140145][ T5003] ? ops_init+0x6b0/0x6b0
[ 62.144554][ T5003] copy_net_ns+0x4ee/0x8e0
[ 62.149009][ T5003] create_new_namespaces+0x3f6/0xb20
[ 62.154369][ T5003] unshare_nsproxy_namespaces+0xc1/0x1f0
[ 62.160079][ T5003] ksys_unshare+0x449/0x920
[ 62.164667][ T5003] ? unshare_fd+0x1c0/0x1c0
[ 62.169207][ T5003] ? unlock_page_memcg+0x3b0/0x3b0
[ 62.174393][ T5003] ? syscall_enter_from_user_mode+0x26/0x80
[ 62.180595][ T5003] __x64_sys_unshare+0x31/0x40
[ 62.185458][ T5003] do_syscall_64+0x39/0xb0
[ 62.189912][ T5003] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 62.195953][ T5003] RIP: 0033:0x7f312268d687
[ 62.200388][ T5003] Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[ 62.220559][ T5003] RSP: 002b:00007ffccb2c92a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[ 62.229048][ T5003] RAX: ffffffffffffffda RBX: 00007ffccb2c98e8 RCX: 00007f312268d687
[ 62.237100][ T5003] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
[ 62.251729][ T5003] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[ 62.259788][ T5003] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
[ 62.267944][ T5003] R13: 00007ffccb2c9380 R14: 00007f31227ac9d8 R15: 000000000000000c
[ 62.276084][ T5003]
[ 62.279553][ T5003] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 62.286824][ T5003] CPU: 1 PID: 5003 Comm: syz-executor.0 Not tainted 6.4.0-rc2-next-20230516-syzkaller-02748-g885df05bf634 #0
[ 62.298383][ T5003] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
[ 62.309267][ T5003] Call Trace:
[ 62.312642][ T5003]
[ 62.315668][ T5003] dump_stack_lvl+0xd9/0x150
[ 62.320362][ T5003] panic+0x686/0x730
[ 62.324524][ T5003] ? panic_smp_self_stop+0xa0/0xa0
[ 62.329661][ T5003] ? show_trace_log_lvl+0x285/0x390
[ 62.334890][ T5003] ? register_net_sysctl+0x207/0x3c0
[ 62.340191][ T5003] check_panic_on_warn+0xb1/0xc0
[ 62.345138][ T5003] __warn+0xf2/0x390
[ 62.349114][ T5003] ? preempt_schedule_notrace+0x5f/0xd0
[ 62.354754][ T5003] ? register_net_sysctl+0x207/0x3c0
[ 62.360062][ T5003] report_bug+0x2da/0x500
[ 62.365275][ T5003] handle_bug+0x3c/0x70
[ 62.369459][ T5003] exc_invalid_op+0x18/0x50
[ 62.374074][ T5003] asm_exc_invalid_op+0x1a/0x20
[ 62.379019][ T5003] RIP: 0010:register_net_sysctl+0x207/0x3c0
[ 62.384953][ T5003] Code: 8b 43 f4 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 a9 01 00 00 48 8b 53 ec 4c 89 e9 4c 89 fe 48 c7 c7 c0 98 85 8b e8 69 13 7f f7 <0f> 0b 48 89 d8 48 c1 e8 03 0f b6 14 28 48 89 d8 83 e0 07 83 c0 01
[ 62.404672][ T5003] RSP: 0018:ffffc9000431fbf8 EFLAGS: 00010286
[ 62.410759][ T5003] RAX: 0000000000000000 RBX: ffff88802b885854 RCX: 0000000000000000
[ 62.418732][ T5003] RDX: ffff888025668000 RSI: ffffffff814bd247 RDI: 0000000000000001
[ 62.426707][ T5003] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
[ 62.434701][ T5003] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802b885848
[ 62.442986][ T5003] R13: ffffffff8b859740 R14: 0000000000000000 R15: ffffffff8b69e220
[ 62.450989][ T5003] ? __warn_printk+0x187/0x310
[ 62.455786][ T5003] ? register_net_sysctl+0x207/0x3c0
[ 62.461657][ T5003] ? ip4_frag_init+0x380/0x380
[ 62.471044][ T5003] ipv4_frags_init_net+0x269/0x430
[ 62.476272][ T5003] ops_init+0xb9/0x6b0
[ 62.480489][ T5003] setup_net+0x5d1/0xc50
[ 62.484769][ T5003] ? down_read_killable+0x14a/0x4f0
[ 62.490107][ T5003] ? ops_init+0x6b0/0x6b0
[ 62.494466][ T5003] copy_net_ns+0x4ee/0x8e0
[ 62.498906][ T5003] create_new_namespaces+0x3f6/0xb20
[ 62.504335][ T5003] unshare_nsproxy_namespaces+0xc1/0x1f0
[ 62.510016][ T5003] ksys_unshare+0x449/0x920
[ 62.514654][ T5003] ? unshare_fd+0x1c0/0x1c0
[ 62.519195][ T5003] ? unlock_page_memcg+0x3b0/0x3b0
[ 62.524332][ T5003] ? syscall_enter_from_user_mode+0x26/0x80
[ 62.530262][ T5003] __x64_sys_unshare+0x31/0x40
[ 62.535042][ T5003] do_syscall_64+0x39/0xb0
[ 62.539467][ T5003] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 62.545375][ T5003] RIP: 0033:0x7f312268d687
[ 62.549793][ T5003] Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[ 62.569500][ T5003] RSP: 002b:00007ffccb2c92a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[ 62.577923][ T5003] RAX: ffffffffffffffda RBX: 00007ffccb2c98e8 RCX: 00007f312268d687
[ 62.585992][ T5003] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
[ 62.593964][ T5003] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[ 62.602121][ T5003] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
[ 62.610110][ T5003] R13: 00007ffccb2c9380 R14: 00007f31227ac9d8 R15: 000000000000000c
[ 62.618113][ T5003]
[ 62.621420][ T5003] Kernel Offset: disabled
[ 62.626242][ T5003] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=)
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="go1.20.1"
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 -fdebug-prefix-map=/tmp/go-build3132506128=/tmp/go-build -gno-record-gcc-switches"
git status (err=)
HEAD detached at 0a9c11b64
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=0a9c11b64c9f99ba6bf90f22430b6794577c7aeb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230206-133939'" "-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=0a9c11b64c9f99ba6bf90f22430b6794577c7aeb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230206-133939'" "-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=0a9c11b64c9f99ba6bf90f22430b6794577c7aeb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230206-133939'" "-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=\"0a9c11b64c9f99ba6bf90f22430b6794577c7aeb\"