Extracting prog: 34m46.4887783s Minimizing prog: 3h30m5.45956197s Simplifying prog options: 54m57.734493465s Extracting C: 18m34.56467505s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 45s testing program (duration=45s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 5m0s testing program (duration=5m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 16m0s testing program (duration=16m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program crashed: INFO: task hung in rtnl_lock single: successfully extracted reproducer found reproducer with 3 syscalls minimizing guilty program testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-syz_emit_ethernet detailed listing: executing program 0: socket$nl_netfilter(0x10, 0x3, 0xc) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: sendmsg$NFT_BATCH(0xffffffffffffffff, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, 0x0, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, 0x0}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={0x0, 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x0, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet 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=22m54.423596452s, {Threaded:false Repeat:true RepeatTimes:0 Procs:2 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash testing program (duration=22m54.423596452s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet detailed listing: executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$NFT_BATCH(r0, &(0x7f00000000c0)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000200)=ANY=[@ANYBLOB="140000001000010000000000000000000000000a20000000000a010300000000000000000100fffd0900010073797a300000000040000000030a01020000000000000000010000000900030073797a3200000000140004800800024032658aeb08000140000000010900010073797a300000000044000000060a010400000000000001040100000008000b40000000000900010073797a30000000001c000480180001800d00010073796e70726f7879000000000400028014000000110001"], 0xcc}}, 0x0) syz_emit_ethernet(0x3a, &(0x7f0000000140)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x2c, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x6, 0xc2, 0x0, 0x0, 0x0, {[@nop]}}}}}}}, 0x0) program did not crash reproducing took 5h18m24.247527145s repro crashed as (corrupted=false): INFO: task kworker/u8:1:12 blocked for more than 420 seconds. Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:1 state:D stack:0 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: [] context_switch kernel/sched/core.c:5377 [inline] [] __schedule+0xe4c/0x3d70 kernel/sched/core.c:6764 [] __schedule_loop kernel/sched/core.c:6841 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6856 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6913 [] __mutex_lock_common kernel/locking/mutex.c:662 [inline] [] __mutex_lock+0x9b2/0x1230 kernel/locking/mutex.c:730 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:782 [] rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 [] rtnl_net_lock include/linux/rtnetlink.h:129 [inline] [] addrconf_verify_work+0x1c/0x3c net/ipv6/addrconf.c:4730 [] process_one_work+0x96a/0x1f3a kernel/workqueue.c:3236 [] process_scheduled_works kernel/workqueue.c:3317 [inline] [] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3398 [] kthread+0x37e/0x7b6 kernel/kthread.c:464 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327 Showing all locks held in the system: 1 lock held by kthreadd/2: 4 locks held by kworker/0:0/8: 3 locks held by kworker/u8:1/12: #0: ffffaf8018b28948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f80000d7bd0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 3 locks held by kworker/u9:0/27: #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f80001d7bd0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 1 lock held by khungtaskd/37: #0: ffffffff883d8200 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x288 kernel/locking/lockdep.c:6742 4 locks held by kworker/1:2/830: 1 lock held by klogd/2993: 2 locks held by getty/3141: #0: ffffaf8018e360a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ffff8f800008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211 1 lock held by syz-executor/3190: 4 locks held by kworker/0:1/3192: 2 locks held by kworker/1:0/3193: 2 locks held by kworker/u9:3/3720: #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f8003c07bd0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 5 locks held by kworker/1:3/3870: 4 locks held by kworker/0:3/3871: 2 locks held by syz-executor/3878: 3 locks held by kworker/u9:4/4566: 4 locks held by kworker/1:4/4644: #0: ffffaf80288a7948 ((wq_completion)wg-kex-wg0#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f8001e87bd0 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)(( unsigned long)((worker))))); (typeof((typeof(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffaf801b55d308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x12c/0x904 drivers/net/wireguard/noise.c:598 #3: ffffaf8012a88cb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x4b4/0x904 drivers/net/wireguard/noise.c:632 2 locks held by rm/4650: 1 lock held by syz.2.18/4651: #0: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120 [] dump_stack+0x1c/0x24 lib/dump_stack.c:129 [] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113 [] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62 [] arch_trigger_cpumask_backtrace+0x2c/0x3e arch/riscv/kernel/smp.c:348 [] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] [] watchdog+0xcf2/0x11de kernel/hung_task.c:399 [] kthread+0x37e/0x7b6 kernel/kthread.c:464 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3190 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 Hardware name: riscv-virtio,qemu (DT) epc : __sanitizer_cov_trace_pc+0x70/0x78 kernel/kcov.c:235 ra : __virt_to_phys+0x24/0x262 arch/riscv/mm/physaddr.c:14 epc : ffffffff804dbef2 ra : ffffffff8009c11c sp : ffff8f80074c7ac0 gp : ffffffff89c1d3c0 tp : ffffaf8018cb9a40 t0 : 19f325f1980d9992 t1 : fffff5ef0ddade60 t2 : 0000000000000017 s0 : ffff8f80074c7ad0 s1 : ffffaf803d62e000 a0 : ffffaf803d62e000 a1 : 0000000000000004 a2 : 0000000000000002 a3 : ffffffff8009c11c a4 : 0000000000000000 a5 : ffffaf8018cbaa40 a6 : fffff5ef0ddade61 a7 : ffffaf806ed6f303 s2 : ffffaf803d62e000 s3 : ffffffff87d8fe80 s4 : 0000000000000000 s5 : ffffffff80a71258 s6 : ffff8f80074c7b80 s7 : 00000000000000f5 s8 : ffffffff87d8feb8 s9 : ffffffff87d8fe78 s10: ffffffff87d8fe80 s11: ffffaf8037b89200 t3 : ffffaf8018cba570 t4 : fffff5ef0ddade60 t5 : fffff5ef0ddade61 t6 : 000000000000000c status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] __sanitizer_cov_trace_pc+0x70/0x78 kernel/kcov.c:233 [] __virt_to_phys+0x24/0x262 arch/riscv/mm/physaddr.c:14 [] virt_to_folio include/linux/mm.h:1295 [inline] [] virt_to_slab mm/slab.h:211 [inline] [] qlink_to_cache mm/kasan/quarantine.c:131 [inline] [] qlist_free_all+0xa2/0x168 mm/kasan/quarantine.c:176 [] kasan_quarantine_reduce+0x158/0x1ba mm/kasan/quarantine.c:286 [] __kasan_slab_alloc+0x5c/0x82 mm/kasan/common.c:329 [] kasan_slab_alloc include/linux/kasan.h:250 [inline] [] slab_post_alloc_hook mm/slub.c:4115 [inline] [] slab_alloc_node mm/slub.c:4164 [inline] [] __do_kmalloc_node mm/slub.c:4293 [inline] [] __kmalloc_noprof+0x216/0x5be mm/slub.c:4306 [] kmalloc_noprof include/linux/slab.h:905 [inline] [] kmalloc_array_noprof include/linux/slab.h:946 [inline] [] alloc_pipe_info+0x1e4/0x538 fs/pipe.c:816 [] get_pipe_inode fs/pipe.c:891 [inline] [] create_pipe_files+0x8e/0x75c fs/pipe.c:923 [] __do_pipe_flags fs/pipe.c:974 [inline] [] do_pipe2+0xc0/0x1c0 fs/pipe.c:1025 [] __do_sys_pipe2 fs/pipe.c:1043 [inline] [] __se_sys_pipe2 fs/pipe.c:1041 [inline] [] __riscv_sys_pipe2+0x52/0x72 fs/pipe.c:1041 [] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331 [] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197 final repro crashed as (corrupted=false): INFO: task kworker/u8:1:12 blocked for more than 420 seconds. Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:1 state:D stack:0 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: [] context_switch kernel/sched/core.c:5377 [inline] [] __schedule+0xe4c/0x3d70 kernel/sched/core.c:6764 [] __schedule_loop kernel/sched/core.c:6841 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6856 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6913 [] __mutex_lock_common kernel/locking/mutex.c:662 [inline] [] __mutex_lock+0x9b2/0x1230 kernel/locking/mutex.c:730 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:782 [] rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 [] rtnl_net_lock include/linux/rtnetlink.h:129 [inline] [] addrconf_verify_work+0x1c/0x3c net/ipv6/addrconf.c:4730 [] process_one_work+0x96a/0x1f3a kernel/workqueue.c:3236 [] process_scheduled_works kernel/workqueue.c:3317 [inline] [] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3398 [] kthread+0x37e/0x7b6 kernel/kthread.c:464 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327 Showing all locks held in the system: 1 lock held by kthreadd/2: 4 locks held by kworker/0:0/8: 3 locks held by kworker/u8:1/12: #0: ffffaf8018b28948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f80000d7bd0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 3 locks held by kworker/u9:0/27: #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f80001d7bd0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 1 lock held by khungtaskd/37: #0: ffffffff883d8200 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x288 kernel/locking/lockdep.c:6742 4 locks held by kworker/1:2/830: 1 lock held by klogd/2993: 2 locks held by getty/3141: #0: ffffaf8018e360a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ffff8f800008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211 1 lock held by syz-executor/3190: 4 locks held by kworker/0:1/3192: 2 locks held by kworker/1:0/3193: 2 locks held by kworker/u9:3/3720: #0: ffffaf8011a89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f8003c07bd0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 5 locks held by kworker/1:3/3870: 4 locks held by kworker/0:3/3871: 2 locks held by syz-executor/3878: 3 locks held by kworker/u9:4/4566: 4 locks held by kworker/1:4/4644: #0: ffffaf80288a7948 ((wq_completion)wg-kex-wg0#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f3a kernel/workqueue.c:3211 #1: ffff8f8001e87bd0 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)(( unsigned long)((worker))))); (typeof((typeof(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f3a kernel/workqueue.c:3211 #2: ffffaf801b55d308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x12c/0x904 drivers/net/wireguard/noise.c:598 #3: ffffaf8012a88cb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x4b4/0x904 drivers/net/wireguard/noise.c:632 2 locks held by rm/4650: 1 lock held by syz.2.18/4651: #0: ffffffff898011c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120 [] dump_stack+0x1c/0x24 lib/dump_stack.c:129 [] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113 [] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62 [] arch_trigger_cpumask_backtrace+0x2c/0x3e arch/riscv/kernel/smp.c:348 [] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] [] watchdog+0xcf2/0x11de kernel/hung_task.c:399 [] kthread+0x37e/0x7b6 kernel/kthread.c:464 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:327 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3190 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-g245aece3750d #0 Hardware name: riscv-virtio,qemu (DT) epc : __sanitizer_cov_trace_pc+0x70/0x78 kernel/kcov.c:235 ra : __virt_to_phys+0x24/0x262 arch/riscv/mm/physaddr.c:14 epc : ffffffff804dbef2 ra : ffffffff8009c11c sp : ffff8f80074c7ac0 gp : ffffffff89c1d3c0 tp : ffffaf8018cb9a40 t0 : 19f325f1980d9992 t1 : fffff5ef0ddade60 t2 : 0000000000000017 s0 : ffff8f80074c7ad0 s1 : ffffaf803d62e000 a0 : ffffaf803d62e000 a1 : 0000000000000004 a2 : 0000000000000002 a3 : ffffffff8009c11c a4 : 0000000000000000 a5 : ffffaf8018cbaa40 a6 : fffff5ef0ddade61 a7 : ffffaf806ed6f303 s2 : ffffaf803d62e000 s3 : ffffffff87d8fe80 s4 : 0000000000000000 s5 : ffffffff80a71258 s6 : ffff8f80074c7b80 s7 : 00000000000000f5 s8 : ffffffff87d8feb8 s9 : ffffffff87d8fe78 s10: ffffffff87d8fe80 s11: ffffaf8037b89200 t3 : ffffaf8018cba570 t4 : fffff5ef0ddade60 t5 : fffff5ef0ddade61 t6 : 000000000000000c status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] __sanitizer_cov_trace_pc+0x70/0x78 kernel/kcov.c:233 [] __virt_to_phys+0x24/0x262 arch/riscv/mm/physaddr.c:14 [] virt_to_folio include/linux/mm.h:1295 [inline] [] virt_to_slab mm/slab.h:211 [inline] [] qlink_to_cache mm/kasan/quarantine.c:131 [inline] [] qlist_free_all+0xa2/0x168 mm/kasan/quarantine.c:176 [] kasan_quarantine_reduce+0x158/0x1ba mm/kasan/quarantine.c:286 [] __kasan_slab_alloc+0x5c/0x82 mm/kasan/common.c:329 [] kasan_slab_alloc include/linux/kasan.h:250 [inline] [] slab_post_alloc_hook mm/slub.c:4115 [inline] [] slab_alloc_node mm/slub.c:4164 [inline] [] __do_kmalloc_node mm/slub.c:4293 [inline] [] __kmalloc_noprof+0x216/0x5be mm/slub.c:4306 [] kmalloc_noprof include/linux/slab.h:905 [inline] [] kmalloc_array_noprof include/linux/slab.h:946 [inline] [] alloc_pipe_info+0x1e4/0x538 fs/pipe.c:816 [] get_pipe_inode fs/pipe.c:891 [inline] [] create_pipe_files+0x8e/0x75c fs/pipe.c:923 [] __do_pipe_flags fs/pipe.c:974 [inline] [] do_pipe2+0xc0/0x1c0 fs/pipe.c:1025 [] __do_sys_pipe2 fs/pipe.c:1043 [inline] [] __se_sys_pipe2 fs/pipe.c:1041 [inline] [] __riscv_sys_pipe2+0x52/0x72 fs/pipe.c:1041 [] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90 [] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331 [] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:197