Extracting prog: 36m42.396965483s Minimizing prog: 3h47m48.930433917s Simplifying prog options: 57m28.505540387s Extracting C: 18m39.72603644s 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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program crashed: INFO: task hung in rtnl_lock single: successfully extracted reproducer found reproducer with 3 syscalls minimizing guilty program testing program (duration=24m50.595927766s, {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=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash testing program (duration=24m50.595927766s, {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=24m50.595927766s, {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: INFO: task hung in corrupted a never seen crash title: INFO: task hung in corrupted, ignore simplifying guilty program options testing program (duration=24m50.595927766s, {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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program crashed: INFO: task hung in rtnl_lock extracting C reproducer testing compiled C program (duration=24m50.595927766s, {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 program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing program (duration=24m50.595927766s, {Threaded:false 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(0x3e, &(0x7f0000000100)={@link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}, @link_local, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x0, 0x30, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x10, 0x4e26, 0x41424344, 0x41424344, 0x0, 0x0, 0x7, 0xc2, 0x0, 0x0, 0x0, {[@mss={0x2, 0x4, 0xa005}, @sack_perm={0x4, 0x2}]}}}}}}}, 0x0) program did not crash reproducing took 5h36m12.846982171s repro crashed as (corrupted=false): INFO: task kworker/u8:1:12 blocked for more than 434 seconds. Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #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 flags:0x00000000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: [] context_switch kernel/sched/core.c:5369 [inline] [] __schedule+0xdaa/0x393a kernel/sched/core.c:6756 [] __schedule_loop kernel/sched/core.c:6833 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6848 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6905 [] __mutex_lock_common kernel/locking/mutex.c:665 [inline] [] __mutex_lock+0x8c6/0x1082 kernel/locking/mutex.c:735 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:787 [] rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 [] addrconf_dad_work+0xbc/0x1420 net/ipv6/addrconf.c:4215 [] process_one_work+0x968/0x1f38 kernel/workqueue.c:3229 [] process_scheduled_works kernel/workqueue.c:3310 [inline] [] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391 [] kthread+0x28c/0x3a4 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:1/12: #0: ff6000001ca42148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000000d7c90 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ffffffff895df208 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 2 locks held by kworker/u9:1/30: 3 locks held by kworker/u9:2/34: 4 locks held by kworker/1:1/36: 1 lock held by khungtaskd/38: #0: ffffffff881d0c40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x2e6 kernel/locking/lockdep.c:6740 1 lock held by kswapd0/79: 1 lock held by aoe_tx0/1207: 1 lock held by klogd/2978: 2 locks held by getty/3125: #0: ff6000001cd5f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211 4 locks held by kworker/u9:3/3159: #0: ff60000018627948 ((wq_completion)wg-kex-wg0){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000073b7c90 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000031c0d2c8 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0xe4/0x5f0 drivers/net/wireguard/noise.c:529 #3: ff60000018e78cb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0xee/0x5f0 drivers/net/wireguard/noise.c:530 2 locks held by syz-executor/3180: 3 locks held by kworker/0:2/3185: #0: ff6000001dccfd48 ((wq_completion)wg-kex-wg1#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000074a7c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000018e79fb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_begin_session+0x38/0xdaa drivers/net/wireguard/noise.c:822 2 locks held by kworker/1:0/3186: 3 locks held by kworker/u9:4/3450: 4 locks held by kworker/0:3/3804: #0: ff6000001c666548 ((wq_completion)wg-kex-wg2#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff20000002c87c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff6000001aa412c8 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x12c/0x904 drivers/net/wireguard/noise.c:598 #3: ff60000018e7a938 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x4b4/0x904 drivers/net/wireguard/noise.c:632 1 lock held by syz-executor/3809: #0: ffffffff895df208 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 2 locks held by syz-executor/3810: 4 locks held by kworker/1:3/4490: 3 locks held by kworker/1:4/4580: #0: ff6000001dccfd48 ((wq_completion)wg-kex-wg1#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000035c7c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000018e79fb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_begin_session+0x38/0xdaa drivers/net/wireguard/noise.c:822 2 locks held by kworker/1:5/4581: 5 locks held by kworker/0:4/4582: 2 locks held by cmp/4586: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:136 [] __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:347 [] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] [] watchdog+0xcee/0x1170 kernel/hung_task.c:397 [] kthread+0x28c/0x3a4 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 4490 Comm: kworker/1:3 Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0 Hardware name: riscv-virtio,qemu (DT) Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] epc : _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] ra : _raw_spin_unlock_irqrestore+0x86/0xd4 kernel/locking/spinlock.c:194 epc : ffffffff861e4106 ra : ffffffff861e4156 sp : ff20000000017b60 gp : ffffffff899f4f80 tp : ff6000001c4bb480 t0 : 3df1592f76153240 t1 : fffffffef219c2e3 t2 : 0000000000000000 s0 : ff20000000017b80 s1 : 0000000000000002 a0 : 0000000000000001 a1 : ffffffff8663f920 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001 a5 : 0000000000000000 a6 : ff6000001c4bc038 a7 : 1fec000003897807 s2 : ffffffff90ce1718 s3 : dfffffff00000000 s4 : 0000000000000006 s5 : 0000000000000000 s6 : ff6000004a32ea50 s7 : 1fe4000000002f74 s8 : 0000000000000001 s9 : ffffffff90ce1718 s10: 0000000200000022 s11: 1fec000009465d2b t3 : ff6000001c4bbfa0 t4 : fffffffef219c2e3 t5 : fffffffef219c2e4 t6 : 000000000000000b status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline] [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] [] _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194 [] debug_object_active_state+0x274/0x2c4 lib/debugobjects.c:1055 [] debug_rcu_head_unqueue kernel/rcu/rcu.h:233 [inline] [] rcu_do_batch kernel/rcu/tree.c:2559 [inline] [] rcu_core+0x9c0/0x1ea0 kernel/rcu/tree.c:2823 [] rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2840 [] handle_softirqs+0x4b2/0x132e kernel/softirq.c:554 [] __do_softirq kernel/softirq.c:588 [inline] [] invoke_softirq kernel/softirq.c:428 [inline] [] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:655 [] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:671 [] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:378 [] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355 final repro crashed as (corrupted=false): INFO: task kworker/u8:1:12 blocked for more than 434 seconds. Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #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 flags:0x00000000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: [] context_switch kernel/sched/core.c:5369 [inline] [] __schedule+0xdaa/0x393a kernel/sched/core.c:6756 [] __schedule_loop kernel/sched/core.c:6833 [inline] [] schedule+0xc4/0x324 kernel/sched/core.c:6848 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6905 [] __mutex_lock_common kernel/locking/mutex.c:665 [inline] [] __mutex_lock+0x8c6/0x1082 kernel/locking/mutex.c:735 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:787 [] rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 [] addrconf_dad_work+0xbc/0x1420 net/ipv6/addrconf.c:4215 [] process_one_work+0x968/0x1f38 kernel/workqueue.c:3229 [] process_scheduled_works kernel/workqueue.c:3310 [inline] [] worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391 [] kthread+0x28c/0x3a4 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:1/12: #0: ff6000001ca42148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000000d7c90 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ffffffff895df208 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 2 locks held by kworker/u9:1/30: 3 locks held by kworker/u9:2/34: 4 locks held by kworker/1:1/36: 1 lock held by khungtaskd/38: #0: ffffffff881d0c40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x68/0x2e6 kernel/locking/lockdep.c:6740 1 lock held by kswapd0/79: 1 lock held by aoe_tx0/1207: 1 lock held by klogd/2978: 2 locks held by getty/3125: #0: ff6000001cd5f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211 4 locks held by kworker/u9:3/3159: #0: ff60000018627948 ((wq_completion)wg-kex-wg0){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000073b7c90 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000031c0d2c8 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0xe4/0x5f0 drivers/net/wireguard/noise.c:529 #3: ff60000018e78cb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0xee/0x5f0 drivers/net/wireguard/noise.c:530 2 locks held by syz-executor/3180: 3 locks held by kworker/0:2/3185: #0: ff6000001dccfd48 ((wq_completion)wg-kex-wg1#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000074a7c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000018e79fb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_begin_session+0x38/0xdaa drivers/net/wireguard/noise.c:822 2 locks held by kworker/1:0/3186: 3 locks held by kworker/u9:4/3450: 4 locks held by kworker/0:3/3804: #0: ff6000001c666548 ((wq_completion)wg-kex-wg2#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff20000002c87c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff6000001aa412c8 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x12c/0x904 drivers/net/wireguard/noise.c:598 #3: ff60000018e7a938 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x4b4/0x904 drivers/net/wireguard/noise.c:632 1 lock held by syz-executor/3809: #0: ffffffff895df208 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:79 2 locks held by syz-executor/3810: 4 locks held by kworker/1:3/4490: 3 locks held by kworker/1:4/4580: #0: ff6000001dccfd48 ((wq_completion)wg-kex-wg1#2){+.+.}-{0:0}, at: process_one_work+0x848/0x1f38 kernel/workqueue.c:3204 #1: ff200000035c7c90 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))); (typeof(({ unsigned long __pcpu_ptr = ( unsigned long)((worker)); (typeof(*((worker))) *)(__pcpu_ptr); }))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f38 kernel/workqueue.c:3204 #2: ff60000018e79fb8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_begin_session+0x38/0xdaa drivers/net/wireguard/noise.c:822 2 locks held by kworker/1:5/4581: 5 locks held by kworker/0:4/4582: 2 locks held by cmp/4586: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:136 [] __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:347 [] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] [] watchdog+0xcee/0x1170 kernel/hung_task.c:397 [] kthread+0x28c/0x3a4 kernel/kthread.c:389 [] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 4490 Comm: kworker/1:3 Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0 Hardware name: riscv-virtio,qemu (DT) Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] epc : _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] ra : _raw_spin_unlock_irqrestore+0x86/0xd4 kernel/locking/spinlock.c:194 epc : ffffffff861e4106 ra : ffffffff861e4156 sp : ff20000000017b60 gp : ffffffff899f4f80 tp : ff6000001c4bb480 t0 : 3df1592f76153240 t1 : fffffffef219c2e3 t2 : 0000000000000000 s0 : ff20000000017b80 s1 : 0000000000000002 a0 : 0000000000000001 a1 : ffffffff8663f920 a2 : 0000000000000003 a3 : 0000000000000101 a4 : 0000000000000001 a5 : 0000000000000000 a6 : ff6000001c4bc038 a7 : 1fec000003897807 s2 : ffffffff90ce1718 s3 : dfffffff00000000 s4 : 0000000000000006 s5 : 0000000000000000 s6 : ff6000004a32ea50 s7 : 1fe4000000002f74 s8 : 0000000000000001 s9 : ffffffff90ce1718 s10: 0000000200000022 s11: 1fec000009465d2b t3 : ff6000001c4bbfa0 t4 : fffffffef219c2e3 t5 : fffffffef219c2e4 t6 : 000000000000000b status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001 [] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline] [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] [] _raw_spin_unlock_irqrestore+0x36/0xd4 kernel/locking/spinlock.c:194 [] debug_object_active_state+0x274/0x2c4 lib/debugobjects.c:1055 [] debug_rcu_head_unqueue kernel/rcu/rcu.h:233 [inline] [] rcu_do_batch kernel/rcu/tree.c:2559 [inline] [] rcu_core+0x9c0/0x1ea0 kernel/rcu/tree.c:2823 [] rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2840 [] handle_softirqs+0x4b2/0x132e kernel/softirq.c:554 [] __do_softirq kernel/softirq.c:588 [inline] [] invoke_softirq kernel/softirq.c:428 [inline] [] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:655 [] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:671 [] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:378 [] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:355