Extracting prog: 6m20.926028568s
Minimizing prog: 18m41.841236995s
Simplifying prog options: 10m1.423788157s
Extracting C: 5m12.924125729s
Simplifying C: 0s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[@ANYBLOB="120000000400000004000000df0000", @ANYRES32=0x1, @ANYBLOB], 0x50)
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[@ANYBLOB="120000000400000004000000df0000", @ANYRES32=0x1, @ANYBLOB], 0x50)
program crashed: WARNING in call_timer_fn
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=6m0.91353663s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, 0x0, 0x50)
program did not crash
testing program (duration=6m0.91353663s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[], 0x50)
program did not crash
testing program (duration=6m0.91353663s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[@ANYBLOB, @ANYRES32=0x1, @ANYBLOB], 0x50)
program did not crash
extracting C reproducer
testing compiled C program (duration=6m0.91353663s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0.91353663s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[@ANYBLOB="120000000400000004000000df0000", @ANYRES32=0x1, @ANYBLOB], 0x50)
program crashed: lost connection to test machine
a never seen crash title: lost connection to test machine, ignore
testing program (duration=6m0.91353663s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$MAP_CREATE
detailed listing:
executing program 0:
bpf$MAP_CREATE(0x0, &(0x7f0000000980)=ANY=[@ANYBLOB="120000000400000004000000df0000", @ANYRES32=0x1, @ANYBLOB], 0x50)
program did not crash
reproducing took 40m17.11520067s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 56 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90
Modules linked in:
CPU: 0 PID: 56 Comm: kworker/u4:4 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441
Code: 8b 3c 24 e8 66 55 88 00 e9 d9 fc ff ff e8 2c f4 30 00 89 ee 48 c7 c7 a0 c5 1d 8d e8 5e 42 15 03 e9 1e fc ff ff e8 14 f4 30 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 fe f3 30 00
RSP: 0018:ffffc90000007af8 EFLAGS: 00010046
RAX: ffffffff8159b5ac RBX: 00000000000b0012 RCX: ffff88801f281dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff815aa245 R09: fffffbfff1d4168e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff88805d435800
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055863223fb98 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1544 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 26 91 48 c7 c6 10 05 6b 81 e8 0a b0 08 00 e8 45 c4 08 00 e9 ea fb ff ff e8 6b 7d 46 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc900015774c0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff920002aeea0 RCX: ffffffff973c0103
RDX: 0000000000000001 RSI: ffffffff8b0c2a20 RDI: ffffffff8b5f6f80
RBP: ffffc900015775a0 R08: dffffc0000000000 R09: fffffbfff2251422
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90001577500
R13: 1ffff920002aee9c R14: 0000000000000000 R15: 0000000000000203
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
qdisc_put net/sched/sch_generic.c:1104 [inline]
dev_shutdown+0x359/0x440 net/sched/sch_generic.c:1492
unregister_netdevice_many+0xac3/0x1710 net/core/dev.c:10969
unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10909
unregister_netdevice include/linux/netdevice.h:3075 [inline]
nsim_destroy+0x44/0x140 drivers/net/netdevsim/netdev.c:382
__nsim_dev_port_del+0x153/0x1b0 drivers/net/netdevsim/dev.c:1433
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1445 [inline]
nsim_dev_reload_destroy+0x286/0x490 drivers/net/netdevsim/dev.c:1662
nsim_dev_reload_down+0x94/0xc0 drivers/net/netdevsim/dev.c:968
devlink_reload+0x1f0/0x6a0 net/devlink/leftover.c:4472
devlink_pernet_pre_exit+0x150/0x2f0 net/devlink/leftover.c:12501
ops_pre_exit_list net/core/net_namespace.c:162 [inline]
cleanup_net+0x60e/0xd20 net/core/net_namespace.c:620
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 26 91 es xchg %eax,%ecx
2: 48 c7 c6 10 05 6b 81 mov $0xffffffff816b0510,%rsi
9: e8 0a b0 08 00 call 0x8b018
e: e8 45 c4 08 00 call 0x8c458
13: e9 ea fb ff ff jmp 0xfffffc02
18: e8 6b 7d 46 09 call 0x9467d88
1d: 41 f7 c7 00 02 00 00 test $0x200,%r15d
24: 74 d0 je 0xfffffff6
26: fb sti
27: 45 84 f6 test %r14b,%r14b
* 2a: 75 cf jne 0xfffffffb <-- trapping instruction
2c: eb e0 jmp 0xe
2e: 0f 0b ud2
30: 45 31 f6 xor %r14d,%r14d
33: e9 64 ff ff ff jmp 0xffffff9c
38: 0f 0b ud2
3a: e9 a5 fe ff ff jmp 0xfffffee4
3f: 0f .byte 0xf
final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 56 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90
Modules linked in:
CPU: 0 PID: 56 Comm: kworker/u4:4 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441
Code: 8b 3c 24 e8 66 55 88 00 e9 d9 fc ff ff e8 2c f4 30 00 89 ee 48 c7 c7 a0 c5 1d 8d e8 5e 42 15 03 e9 1e fc ff ff e8 14 f4 30 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 fe f3 30 00
RSP: 0018:ffffc90000007af8 EFLAGS: 00010046
RAX: ffffffff8159b5ac RBX: 00000000000b0012 RCX: ffff88801f281dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff815aa245 R09: fffffbfff1d4168e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff88805d435800
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055863223fb98 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1544 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 26 91 48 c7 c6 10 05 6b 81 e8 0a b0 08 00 e8 45 c4 08 00 e9 ea fb ff ff e8 6b 7d 46 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc900015774c0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff920002aeea0 RCX: ffffffff973c0103
RDX: 0000000000000001 RSI: ffffffff8b0c2a20 RDI: ffffffff8b5f6f80
RBP: ffffc900015775a0 R08: dffffc0000000000 R09: fffffbfff2251422
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90001577500
R13: 1ffff920002aee9c R14: 0000000000000000 R15: 0000000000000203
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
qdisc_put net/sched/sch_generic.c:1104 [inline]
dev_shutdown+0x359/0x440 net/sched/sch_generic.c:1492
unregister_netdevice_many+0xac3/0x1710 net/core/dev.c:10969
unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10909
unregister_netdevice include/linux/netdevice.h:3075 [inline]
nsim_destroy+0x44/0x140 drivers/net/netdevsim/netdev.c:382
__nsim_dev_port_del+0x153/0x1b0 drivers/net/netdevsim/dev.c:1433
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1445 [inline]
nsim_dev_reload_destroy+0x286/0x490 drivers/net/netdevsim/dev.c:1662
nsim_dev_reload_down+0x94/0xc0 drivers/net/netdevsim/dev.c:968
devlink_reload+0x1f0/0x6a0 net/devlink/leftover.c:4472
devlink_pernet_pre_exit+0x150/0x2f0 net/devlink/leftover.c:12501
ops_pre_exit_list net/core/net_namespace.c:162 [inline]
cleanup_net+0x60e/0xd20 net/core/net_namespace.c:620
process_one_work+0x917/0x1260 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 26 91 es xchg %eax,%ecx
2: 48 c7 c6 10 05 6b 81 mov $0xffffffff816b0510,%rsi
9: e8 0a b0 08 00 call 0x8b018
e: e8 45 c4 08 00 call 0x8c458
13: e9 ea fb ff ff jmp 0xfffffc02
18: e8 6b 7d 46 09 call 0x9467d88
1d: 41 f7 c7 00 02 00 00 test $0x200,%r15d
24: 74 d0 je 0xfffffff6
26: fb sti
27: 45 84 f6 test %r14b,%r14b
* 2a: 75 cf jne 0xfffffffb <-- trapping instruction
2c: eb e0 jmp 0xe
2e: 0f 0b ud2
30: 45 31 f6 xor %r14d,%r14d
33: e9 64 ff ff ff jmp 0xffffff9c
38: 0f 0b ud2
3a: e9 a5 fe ff ff jmp 0xfffffee4
3f: 0f .byte 0xf