Extracting prog: 3m57.608607671s Minimizing prog: 43m59.933663167s Simplifying prog options: 13m7.819414525s Extracting C: 5m14.408574544s 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:4 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-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) 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:4 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-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program crashed: possible deadlock in smc_vlan_by_tcpsk single: successfully extracted reproducer found reproducer with 5 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-socket-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-socket-connect$auto-connect$auto detailed listing: executing program 0: socket(0x2, 0x1, 0x0) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: getsockopt$auto(0xffffffffffffffff, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, 0x0) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, 0x0, 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, 0x0, 0x55) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-getsockopt$auto-socket-connect$auto-connect$auto program crashed: no output from test machine a never seen crash title: no output from test machine, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-getsockopt$auto-socket-connect$auto-connect$auto detailed listing: executing program 0: r0 = socket(0x2, 0x1, 0x0) getsockopt$auto(r0, 0x0, 0x30, 0x0, &(0x7f00000000c0)=0xb) socket(0x2, 0x801, 0x100) connect$auto(0x3, &(0x7f00000000c0), 0x55) connect$auto(0x3, &(0x7f00000000c0), 0x55) program did not crash reproducing took 1h6m19.770271268s repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Not tainted ------------------------------------------------------ kworker/0:0/8 is trying to acquire lock: ffffffff8fabfc48 (rtnl_mutex){+.+.}-{4:4}, at: smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 but task is already holding lock: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect_work+0x53c/0xae0 net/smc/af_smc.c:1597 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+.}-{0:0}: lock_sock_nested+0x3a/0xf0 net/core/sock.c:3622 lock_sock include/net/sock.h:1623 [inline] sockopt_lock_sock net/core/sock.c:1126 [inline] sockopt_lock_sock+0x54/0x70 net/core/sock.c:1117 do_ip_getsockopt+0x115c/0x2bf0 net/ipv4/ip_sockglue.c:1703 ip_getsockopt+0x9c/0x1e0 net/ipv4/ip_sockglue.c:1765 tcp_getsockopt+0x9e/0x100 net/ipv4/tcp.c:4671 do_sock_getsockopt+0x3fe/0x870 net/socket.c:2374 __sys_getsockopt+0x12f/0x260 net/socket.c:2403 __do_sys_getsockopt net/socket.c:2410 [inline] __se_sys_getsockopt net/socket.c:2407 [inline] __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2407 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (rtnl_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 __smc_connect+0x466/0x4890 net/smc/af_smc.c:1517 smc_connect_work+0x54f/0xae0 net/smc/af_smc.c:1610 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 3 locks held by kworker/0:0/8: #0: ffff88814d353548 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204 #1: ffffc900000d7d80 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 #2: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] #2: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect_work+0x53c/0xae0 net/smc/af_smc.c:1597 stack backtrace: CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: smc_hs_wq smc_connect_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x41c/0x610 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 __smc_connect+0x466/0x4890 net/smc/af_smc.c:1517 smc_connect_work+0x54f/0xae0 net/smc/af_smc.c:1610 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 final repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Not tainted ------------------------------------------------------ kworker/0:0/8 is trying to acquire lock: ffffffff8fabfc48 (rtnl_mutex){+.+.}-{4:4}, at: smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 but task is already holding lock: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect_work+0x53c/0xae0 net/smc/af_smc.c:1597 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+.}-{0:0}: lock_sock_nested+0x3a/0xf0 net/core/sock.c:3622 lock_sock include/net/sock.h:1623 [inline] sockopt_lock_sock net/core/sock.c:1126 [inline] sockopt_lock_sock+0x54/0x70 net/core/sock.c:1117 do_ip_getsockopt+0x115c/0x2bf0 net/ipv4/ip_sockglue.c:1703 ip_getsockopt+0x9c/0x1e0 net/ipv4/ip_sockglue.c:1765 tcp_getsockopt+0x9e/0x100 net/ipv4/tcp.c:4671 do_sock_getsockopt+0x3fe/0x870 net/socket.c:2374 __sys_getsockopt+0x12f/0x260 net/socket.c:2403 __do_sys_getsockopt net/socket.c:2410 [inline] __se_sys_getsockopt net/socket.c:2407 [inline] __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2407 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (rtnl_mutex){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 __smc_connect+0x466/0x4890 net/smc/af_smc.c:1517 smc_connect_work+0x54f/0xae0 net/smc/af_smc.c:1610 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 3 locks held by kworker/0:0/8: #0: ffff88814d353548 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204 #1: ffffc900000d7d80 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 #2: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] #2: ffff8880781d8dd8 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_connect_work+0x53c/0xae0 net/smc/af_smc.c:1597 stack backtrace: CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: smc_hs_wq smc_connect_work Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x41c/0x610 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 smc_vlan_by_tcpsk+0x251/0x620 net/smc/smc_core.c:1903 __smc_connect+0x466/0x4890 net/smc/af_smc.c:1517 smc_connect_work+0x54f/0xae0 net/smc/af_smc.c:1610 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244