Extracting prog: 5m35.788223116s
Minimizing prog: 53m29.188862139s
Simplifying prog options: 8m33.008909132s
Extracting C: 4m20.484846992s
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:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

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:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program crashed: INFO: task hung in linkwatch_event
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): socket$nl_netfilter-syz_emit_ethernet
detailed listing:
executing program 0:
socket$nl_netfilter(0x10, 0x3, 0xc)
syz_emit_ethernet(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x71, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x63, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}, {"1d8d53fd95af3d87b33530609cb699258189b246d1d07bf95817d6a9f4e75bd77f7d4cb37e660682c9f56aa4876a708894d8510353370af469dd31"}}}}}}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x36, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x28, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}}}}}}, 0x0)

program crashed: INFO: task hung in addrconf_dad_work
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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}}): socket$nl_netfilter-sendmsg$NFT_BATCH-syz_emit_ethernet
program crashed: INFO: task hung in rtnl_newlink
a never seen crash title: INFO: task hung in rtnl_newlink, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 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}}): 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(0x36, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x28, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}}}}}}, 0x0)

program crashed: INFO: task hung in nl80211_pre_doit
a never seen crash title: INFO: task hung in nl80211_pre_doit, ignore
testing program (duration=6m0s, {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}}): 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(0x36, &(0x7f0000000400)={@local, @broadcast, @void, {@ipv4={0x800, @tcp={{0x5, 0x4, 0x0, 0x3b, 0x28, 0x66, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {{0x4e20, 0x4e29, 0x41424344, 0x41424344, 0x0, 0x0, 0x5, 0x16, 0x1, 0x0, 0x20}}}}}}, 0x0)

program crashed: INFO: task hung in inet_rtm_newaddr
a never seen crash title: INFO: task hung in inet_rtm_newaddr, ignore
reproducing took 1h11m58.470853078s
repro crashed as (corrupted=false):
INFO: task kworker/u4:1:12 blocked for more than 143 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D stack:20368 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6909
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4215
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz-executor:5473 blocked for more than 146 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:17456 pid:5473  tgid:5473  ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6909
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 rtnl_net_lock include/linux/rtnetlink.h:128 [inline]
 inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6922
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 __sys_sendto+0x363/0x4c0 net/socket.c:2197
 __do_sys_sendto net/socket.c:2204 [inline]
 __se_sys_sendto net/socket.c:2200 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2200
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7785587bbc
RSP: 002b:00007ffebae557b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f77862a4620 RCX: 00007f7785587bbc
RDX: 0000000000000028 RSI: 00007f77862a4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffebae55804 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f77862a4670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:5478 blocked for more than 152 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:19872 pid:5478  tgid:5478  ppid:1      flags:0x00004006

final repro crashed as (corrupted=false):
INFO: task kworker/u4:1:12 blocked for more than 143 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D stack:20368 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6909
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4215
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz-executor:5473 blocked for more than 146 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:17456 pid:5473  tgid:5473  ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6909
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 rtnl_net_lock include/linux/rtnetlink.h:128 [inline]
 inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6922
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 __sys_sendto+0x363/0x4c0 net/socket.c:2197
 __do_sys_sendto net/socket.c:2204 [inline]
 __se_sys_sendto net/socket.c:2200 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2200
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7785587bbc
RSP: 002b:00007ffebae557b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f77862a4620 RCX: 00007f7785587bbc
RDX: 0000000000000028 RSI: 00007f77862a4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffebae55804 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f77862a4670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:5478 blocked for more than 152 seconds.
      Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:19872 pid:5478  tgid:5478  ppid:1      flags:0x00004006