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: 5007 at net/sysctl_net.c:155 ensure_safe_net_sysctl net/sysctl_net.c:155 [inline]
WARNING: CPU: 1 PID: 5007 at net/sysctl_net.c:155 register_net_sysctl+0x207/0x3c0 net/sysctl_net.c:167
Modules linked in:
CPU: 1 PID: 5007 Comm: syz-executor.0 Not tainted 6.4.0-rc1-syzkaller-00240-ge641577eb6e8 #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 01 85 8b e8 59 61 81 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:ffffc90003c2fbf8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880220b9054 RCX: 0000000000000000
RDX: ffff888018715940 RSI: ffffffff814c03e7 RDI: 0000000000000001
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880220b9048
R13: ffffffff8b850040 R14: 0000000000000000 R15: ffffffff8b694ce0
FS:  0000555555a30400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b12e78cff0 CR3: 000000006f8c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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:3444
 __do_sys_unshare kernel/fork.c:3515 [inline]
 __se_sys_unshare kernel/fork.c:3513 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3513
 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: 0033:0x7f2970288e87
Code: 73 01 c3 48 c7 c1 bc 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc3c780a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffc3c7810a8 RCX: 00007f2970288e87
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f297038cbf0
R13: 00007ffc3c780b40 R14: 0000000000000000 R15: 00000000000000f8
 </TASK>


Warning: Permanently added '10.128.10.46' (ECDSA) to the list of known hosts.
2023/05/16 16:34:58 ignoring optional flag "raw_cover"="false"
2023/05/16 16:34:58 ignoring optional flag "sandbox_arg"="0"
2023/05/16 16:34:58 fuzzer started
2023/05/16 16:34:58 connecting to host at 10.128.0.169:42027
2023/05/16 16:34:58 checking machine...
2023/05/16 16:34:58 checking revisions...
2023/05/16 16:34:59 testing simple program...
syzkaller login: [   83.517990][   T48] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   83.527531][   T48] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   83.535254][   T48] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   83.543431][   T48] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   83.551658][   T48] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[   83.559302][   T48] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   83.594007][ T5007] ------------[ cut here ]------------
[   83.600185][ T5007] sysctl net/ipv4/ipfrag_low_thresh: data points to kernel global data: ipfrag_low_thresh_unused
[   83.612252][ T5007] WARNING: CPU: 1 PID: 5007 at net/sysctl_net.c:155 register_net_sysctl+0x207/0x3c0
[   83.621772][ T5007] Modules linked in:
[   83.625866][ T5007] CPU: 1 PID: 5007 Comm: syz-executor.0 Not tainted 6.4.0-rc1-syzkaller-00240-ge641577eb6e8 #0
[   83.636293][ T5007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
[   83.646867][ T5007] RIP: 0010:register_net_sysctl+0x207/0x3c0
[   83.652853][ T5007] 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 01 85 8b e8 59 61 81 f7 <0f> 0b 48 89 d8 48 c1 e8 03 0f b6 14 28 48 89 d8 83 e0 07 83 c0 01
[   83.673177][ T5007] RSP: 0018:ffffc90003c2fbf8 EFLAGS: 00010286
[   83.679336][ T5007] RAX: 0000000000000000 RBX: ffff8880220b9054 RCX: 0000000000000000
[   83.687375][ T5007] RDX: ffff888018715940 RSI: ffffffff814c03e7 RDI: 0000000000000001
[   83.695394][ T5007] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
[   83.703444][ T5007] R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880220b9048
[   83.711854][ T5007] R13: ffffffff8b850040 R14: 0000000000000000 R15: ffffffff8b694ce0
[   83.720007][ T5007] FS:  0000555555a30400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
[   83.729060][ T5007] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   83.735742][ T5007] CR2: 000055b12e78cff0 CR3: 000000006f8c6000 CR4: 00000000003506e0
[   83.743795][ T5007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   83.751877][ T5007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   83.760209][ T5007] Call Trace:
[   83.763606][ T5007]  <TASK>
[   83.766630][ T5007]  ? ip4_frag_init+0x380/0x380
[   83.771474][ T5007]  ipv4_frags_init_net+0x269/0x430
[   83.776987][ T5007]  ops_init+0xb9/0x6b0
[   83.781132][ T5007]  setup_net+0x5d1/0xc50
[   83.785416][ T5007]  ? ops_init+0x6b0/0x6b0
[   83.789955][ T5007]  copy_net_ns+0x4ee/0x8e0
[   83.794421][ T5007]  create_new_namespaces+0x3f6/0xb20
[   83.799819][ T5007]  unshare_nsproxy_namespaces+0xc1/0x1f0
[   83.805808][ T5007]  ksys_unshare+0x449/0x920
[   83.810346][ T5007]  ? unshare_fd+0x1c0/0x1c0
[   83.814877][ T5007]  ? unlock_page_memcg+0x2d0/0x2d0
[   83.820088][ T5007]  ? syscall_enter_from_user_mode+0x26/0x80
[   83.826256][ T5007]  __x64_sys_unshare+0x31/0x40
[   83.831145][ T5007]  do_syscall_64+0x39/0xb0
[   83.836104][ T5007]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   83.842060][ T5007] RIP: 0033:0x7f2970288e87
[   83.846566][ T5007] Code: 73 01 c3 48 c7 c1 bc 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 bc ff ff ff f7 d8 64 89 01 48
[   83.866699][ T5007] RSP: 002b:00007ffc3c780a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[   83.875153][ T5007] RAX: ffffffffffffffda RBX: 00007ffc3c7810a8 RCX: 00007f2970288e87
[   83.884449][ T5007] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000040000000
[   83.892650][ T5007] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[   83.901086][ T5007] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f297038cbf0
[   83.909400][ T5007] R13: 00007ffc3c780b40 R14: 0000000000000000 R15: 00000000000000f8
[   83.917948][ T5007]  </TASK>
[   83.921192][ T5007] Kernel panic - not syncing: kernel: panic_on_warn set ...
[   83.928761][ T5007] CPU: 1 PID: 5007 Comm: syz-executor.0 Not tainted 6.4.0-rc1-syzkaller-00240-ge641577eb6e8 #0
[   83.939281][ T5007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
[   83.949878][ T5007] Call Trace:
[   83.953376][ T5007]  <TASK>
[   83.956898][ T5007]  dump_stack_lvl+0xd9/0x150
[   83.961685][ T5007]  panic+0x686/0x730
[   83.965890][ T5007]  ? panic_smp_self_stop+0xa0/0xa0
[   83.971148][ T5007]  ? show_trace_log_lvl+0x285/0x390
[   83.976482][ T5007]  ? register_net_sysctl+0x207/0x3c0
[   83.981805][ T5007]  check_panic_on_warn+0xb1/0xc0
[   83.986776][ T5007]  __warn+0xf2/0x390
[   83.990716][ T5007]  ? preempt_schedule_notrace+0x5f/0xd0
[   83.996342][ T5007]  ? register_net_sysctl+0x207/0x3c0
[   84.001727][ T5007]  report_bug+0x2da/0x500
[   84.006100][ T5007]  handle_bug+0x3c/0x70
[   84.010293][ T5007]  exc_invalid_op+0x18/0x50
[   84.014839][ T5007]  asm_exc_invalid_op+0x1a/0x20
[   84.019721][ T5007] RIP: 0010:register_net_sysctl+0x207/0x3c0
[   84.025825][ T5007] 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 01 85 8b e8 59 61 81 f7 <0f> 0b 48 89 d8 48 c1 e8 03 0f b6 14 28 48 89 d8 83 e0 07 83 c0 01
[   84.046178][ T5007] RSP: 0018:ffffc90003c2fbf8 EFLAGS: 00010286
[   84.052301][ T5007] RAX: 0000000000000000 RBX: ffff8880220b9054 RCX: 0000000000000000
[   84.060323][ T5007] RDX: ffff888018715940 RSI: ffffffff814c03e7 RDI: 0000000000000001
[   84.068346][ T5007] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
[   84.076603][ T5007] R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880220b9048
[   84.084610][ T5007] R13: ffffffff8b850040 R14: 0000000000000000 R15: ffffffff8b694ce0
[   84.092806][ T5007]  ? __warn_printk+0x187/0x310
[   84.097639][ T5007]  ? register_net_sysctl+0x207/0x3c0
[   84.103064][ T5007]  ? ip4_frag_init+0x380/0x380
[   84.107873][ T5007]  ipv4_frags_init_net+0x269/0x430
[   84.113033][ T5007]  ops_init+0xb9/0x6b0
[   84.117152][ T5007]  setup_net+0x5d1/0xc50
[   84.121439][ T5007]  ? ops_init+0x6b0/0x6b0
[   84.125925][ T5007]  copy_net_ns+0x4ee/0x8e0
[   84.130467][ T5007]  create_new_namespaces+0x3f6/0xb20
[   84.135801][ T5007]  unshare_nsproxy_namespaces+0xc1/0x1f0
[   84.141484][ T5007]  ksys_unshare+0x449/0x920
[   84.146472][ T5007]  ? unshare_fd+0x1c0/0x1c0
[   84.151032][ T5007]  ? unlock_page_memcg+0x2d0/0x2d0
[   84.156283][ T5007]  ? syscall_enter_from_user_mode+0x26/0x80
[   84.162233][ T5007]  __x64_sys_unshare+0x31/0x40
[   84.167039][ T5007]  do_syscall_64+0x39/0xb0
[   84.171500][ T5007]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   84.177521][ T5007] RIP: 0033:0x7f2970288e87
[   84.182063][ T5007] Code: 73 01 c3 48 c7 c1 bc 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 bc ff ff ff f7 d8 64 89 01 48
[   84.201785][ T5007] RSP: 002b:00007ffc3c780a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[   84.210419][ T5007] RAX: ffffffffffffffda RBX: 00007ffc3c7810a8 RCX: 00007f2970288e87
[   84.219024][ T5007] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000040000000
[   84.227193][ T5007] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[   84.235195][ T5007] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f297038cbf0
[   84.243276][ T5007] R13: 00007ffc3c780b40 R14: 0000000000000000 R15: 00000000000000f8
[   84.251286][ T5007]  </TASK>
[   84.254391][ T5007] Kernel Offset: disabled
[   84.258882][ T5007] 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="go1.20.1"
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-build749537227=/tmp/go-build -gno-record-gcc-switches"

git status (err=<nil>)
HEAD detached at 1d849ab4d
nothing to commit, working tree clean


go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1d849ab4d892af13a249f75628790b47e42b7c74 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20210930-173221'" "-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=1d849ab4d892af13a249f75628790b47e42b7c74 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20210930-173221'" "-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=1d849ab4d892af13a249f75628790b47e42b7c74 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20210930-173221'" "-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 -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"1d849ab4d892af13a249f75628790b47e42b7c74\"