Extracting prog: 2m51.156545643s
Minimizing prog: 7m53.587642468s
Simplifying prog options: 0s
Extracting C: 1m28.766460721s
Simplifying C: 9m9.203971353s


extracting reproducer from 30 programs
first checking the prog from the crash report
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}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_udp_int(r0, 0x11, 0x68, &(0x7f0000000080)=0xa40, 0x4)
setsockopt$inet6_udp_encap(r0, 0x11, 0x64, &(0x7f0000000000)=0x2, 0x4)

program crashed: WARNING in udp_tunnel_update_gro_rcv
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=53.702117995s, {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}}): socket$inet6-setsockopt$inet6_udp_int
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_udp_int(r0, 0x11, 0x68, &(0x7f0000000080)=0xa40, 0x4)

program did not crash
testing program (duration=53.702117995s, {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}}): socket$inet6-setsockopt$inet6_udp_encap
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_udp_encap(r0, 0x11, 0x64, &(0x7f0000000000)=0x2, 0x4)

program did not crash
testing program (duration=53.702117995s, {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}}): setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
detailed listing:
executing program 0:
setsockopt$inet6_udp_int(0xffffffffffffffff, 0x11, 0x68, &(0x7f0000000080)=0xa40, 0x4)
setsockopt$inet6_udp_encap(0xffffffffffffffff, 0x11, 0x64, &(0x7f0000000000)=0x2, 0x4)

program did not crash
testing program (duration=53.702117995s, {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}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_udp_int(r0, 0x11, 0x68, 0x0, 0x0)
setsockopt$inet6_udp_encap(r0, 0x11, 0x64, &(0x7f0000000000)=0x2, 0x4)

program did not crash
testing program (duration=53.702117995s, {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}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x2, 0x0)
setsockopt$inet6_udp_int(r0, 0x11, 0x68, &(0x7f0000000080)=0xa40, 0x4)
setsockopt$inet6_udp_encap(r0, 0x11, 0x64, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=53.702117995s, {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}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
simplifying C reproducer
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
testing compiled C program (duration=53.702117995s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-setsockopt$inet6_udp_int-setsockopt$inet6_udp_encap
program crashed: WARNING in udp_tunnel_update_gro_rcv
reproducing took 21m22.714638609s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5835 at net/ipv4/udp_offload.c:123 udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123
Modules linked in:
CPU: 0 UID: 0 PID: 5835 Comm: syz-executor498 Not tainted 6.14.0-syzkaller-13320-g420aabef3ab5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123
Code: 00 00 e8 c6 5a 2f f7 48 c1 e5 04 48 8d b5 20 53 c7 9a ba 10 00 00 00 4c 89 ff e8 ce 87 99 f7 e9 ce 00 00 00 e8 a4 5a 2f f7 90 <0f> 0b 90 e9 de fd ff ff bf 01 00 00 00 89 ee e8 cf 5e 2f f7 85 ed
RSP: 0018:ffffc9000409fa88 EFLAGS: 00010293
RAX: ffffffff8a93fc9c RBX: 0000000000000000 RCX: ffff88802fcb1e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8a93fabe R09: 1ffffffff20bfb2e
R10: dffffc0000000000 R11: fffffbfff20bfb2f R12: ffff888035c9a838
R13: dffffc0000000000 R14: ffff888035c9a878 R15: 1ffff11006b9350f
FS:  0000000000000000(0000) GS:ffff888124f96000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f56117fa0d0 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udp_tunnel_cleanup_gro include/net/udp_tunnel.h:205 [inline]
 udpv6_destroy_sock+0x212/0x270 net/ipv6/udp.c:1829
 sk_common_release+0x71/0x2e0 net/core/sock.c:3896
 inet_release+0x17d/0x200 net/ipv4/af_inet.c:435
 __sock_release net/socket.c:647 [inline]
 sock_close+0xbc/0x240 net/socket.c:1391
 __fput+0x3e9/0x9f0 fs/file_table.c:465
 task_work_run+0x251/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa11/0x27f0 kernel/exit.c:953
 do_group_exit+0x207/0x2c0 kernel/exit.c:1102
 __do_sys_exit_group kernel/exit.c:1113 [inline]
 __se_sys_exit_group kernel/exit.c:1111 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f561177ec79
Code: Unable to access opcode bytes at 0x7f561177ec4f.
RSP: 002b:00007ffcb788cb48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f561177ec79
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f56117f9270 R08: ffffffffffffffb8 R09: 00007ffcb788cd68
R10: 0000200000000000 R11: 0000000000000246 R12: 00007f56117f9270
R13: 0000000000000000 R14: 00007f56117f9cc0 R15: 00007f5611750a70
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5835 at net/ipv4/udp_offload.c:123 udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123
Modules linked in:
CPU: 0 UID: 0 PID: 5835 Comm: syz-executor498 Not tainted 6.14.0-syzkaller-13320-g420aabef3ab5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123
Code: 00 00 e8 c6 5a 2f f7 48 c1 e5 04 48 8d b5 20 53 c7 9a ba 10 00 00 00 4c 89 ff e8 ce 87 99 f7 e9 ce 00 00 00 e8 a4 5a 2f f7 90 <0f> 0b 90 e9 de fd ff ff bf 01 00 00 00 89 ee e8 cf 5e 2f f7 85 ed
RSP: 0018:ffffc9000409fa88 EFLAGS: 00010293
RAX: ffffffff8a93fc9c RBX: 0000000000000000 RCX: ffff88802fcb1e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8a93fabe R09: 1ffffffff20bfb2e
R10: dffffc0000000000 R11: fffffbfff20bfb2f R12: ffff888035c9a838
R13: dffffc0000000000 R14: ffff888035c9a878 R15: 1ffff11006b9350f
FS:  0000000000000000(0000) GS:ffff888124f96000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f56117fa0d0 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udp_tunnel_cleanup_gro include/net/udp_tunnel.h:205 [inline]
 udpv6_destroy_sock+0x212/0x270 net/ipv6/udp.c:1829
 sk_common_release+0x71/0x2e0 net/core/sock.c:3896
 inet_release+0x17d/0x200 net/ipv4/af_inet.c:435
 __sock_release net/socket.c:647 [inline]
 sock_close+0xbc/0x240 net/socket.c:1391
 __fput+0x3e9/0x9f0 fs/file_table.c:465
 task_work_run+0x251/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa11/0x27f0 kernel/exit.c:953
 do_group_exit+0x207/0x2c0 kernel/exit.c:1102
 __do_sys_exit_group kernel/exit.c:1113 [inline]
 __se_sys_exit_group kernel/exit.c:1111 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f561177ec79
Code: Unable to access opcode bytes at 0x7f561177ec4f.
RSP: 002b:00007ffcb788cb48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f561177ec79
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f56117f9270 R08: ffffffffffffffb8 R09: 00007ffcb788cd68
R10: 0000200000000000 R11: 0000000000000246 R12: 00007f56117f9270
R13: 0000000000000000 R14: 00007f56117f9cc0 R15: 00007f5611750a70
 </TASK>