Extracting prog: 1m23.125400084s Minimizing prog: 10m35.532025866s Simplifying prog options: 0s Extracting C: 34.703502227s Simplifying C: 8m30.682781523s 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: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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) r2 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r2, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program crashed: possible deadlock in smc_switch_to_fallback single: successfully extracted reproducer found reproducer with 6 syscalls minimizing guilty program testing program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) socket$inet(0x2, 0x4000000000000001, 0x100) program did not crash testing program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-sendto$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) sendto$inet(0xffffffffffffffff, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash testing program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-socket$inet-sendto$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) socket$inet_smc(0x2b, 0x1, 0x0) r1 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r1, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash testing program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(0xffffffffffffffff, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) r1 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r1, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash testing program (duration=1m11.610455793s, {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-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet detailed listing: executing program 0: socket(0x840000000002, 0x3, 0xfa) r0 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r0, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) r1 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r1, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash testing program (duration=1m11.610455793s, {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$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet detailed listing: executing program 0: setsockopt$inet_mreqn(0xffffffffffffffff, 0x0, 0x24, 0x0, 0x0) r0 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r0, 0x0, 0x48b, &(0x7f00000000c0)={0x2, 'dummy0\x00'}, 0x18) r1 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r1, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash testing program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet detailed listing: executing program 0: r0 = socket(0x840000000002, 0x3, 0xfa) setsockopt$inet_mreqn(r0, 0x0, 0x24, 0x0, 0x0) r1 = socket$inet_smc(0x2b, 0x1, 0x0) setsockopt$IP_VS_SO_SET_STARTDAEMON(r1, 0x0, 0x48b, 0x0, 0x0) r2 = socket$inet(0x2, 0x4000000000000001, 0x100) sendto$inet(r2, 0x0, 0x0, 0x200007fd, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback simplifying C reproducer testing compiled C program (duration=1m11.610455793s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program did not crash testing compiled C program (duration=1m11.610455793s, {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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback testing compiled C program (duration=1m11.610455793s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback testing compiled C program (duration=1m11.610455793s, {Threaded:true Repeat:true 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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback testing compiled C program (duration=1m11.610455793s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback testing compiled C program (duration=1m11.610455793s, {Threaded:true Repeat:true 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-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback testing compiled C program (duration=1m11.610455793s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-setsockopt$inet_mreqn-socket$inet_smc-setsockopt$IP_VS_SO_SET_STARTDAEMON-socket$inet-sendto$inet program crashed: possible deadlock in smc_switch_to_fallback reproducing took 21m4.043731815s repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc6-syzkaller-00133-g47e55e4b410f #0 Not tainted ------------------------------------------------------ syz-executor318/5823 is trying to acquire lock: ffff888032790aa8 (&smc->clcsock_release_lock){+.+.}-{4:4}, at: smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 but task is already holding lock: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2772 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 lock_sock_nested+0x48/0x100 net/core/sock.c:3625 do_ip_setsockopt+0x1a2d/0x3cd0 net/ipv4/ip_sockglue.c:1078 ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 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 -> #1 (rtnl_mutex){+.+.}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 start_sync_thread+0xdc/0x2dc0 net/netfilter/ipvs/ip_vs_sync.c:1761 do_ip_vs_set_ctl+0x442/0x13d0 net/netfilter/ipvs/ip_vs_ctl.c:2732 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3078 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 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 -> #0 (&smc->clcsock_release_lock){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2778 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 other info that might help us debug this: Chain exists of: &smc->clcsock_release_lock --> rtnl_mutex --> sk_lock-AF_INET Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(&smc->clcsock_release_lock); *** DEADLOCK *** 1 lock held by syz-executor318/5823: #0: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] #0: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2772 stack backtrace: CPU: 1 UID: 0 PID: 5823 Comm: syz-executor318 Not tainted 6.13.0-rc6-syzkaller-00133-g47e55e4b410f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 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+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2778 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: 0033:0x7feda03bb3e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feda0376208 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007feda0445328 RCX: 00007feda03bb3e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007feda0445320 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200007fd R11: 0000000000000246 R12: 00007feda044532c R13: 00007feda0412074 R14: 0000840000000002 R15: 4000000000000001 final repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc6-syzkaller-00133-g47e55e4b410f #0 Not tainted ------------------------------------------------------ syz-executor318/5823 is trying to acquire lock: ffff888032790aa8 (&smc->clcsock_release_lock){+.+.}-{4:4}, at: smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 but task is already holding lock: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2772 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 lock_sock_nested+0x48/0x100 net/core/sock.c:3625 do_ip_setsockopt+0x1a2d/0x3cd0 net/ipv4/ip_sockglue.c:1078 ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 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 -> #1 (rtnl_mutex){+.+.}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 start_sync_thread+0xdc/0x2dc0 net/netfilter/ipvs/ip_vs_sync.c:1761 do_ip_vs_set_ctl+0x442/0x13d0 net/netfilter/ipvs/ip_vs_ctl.c:2732 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3078 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 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 -> #0 (&smc->clcsock_release_lock){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2778 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 other info that might help us debug this: Chain exists of: &smc->clcsock_release_lock --> rtnl_mutex --> sk_lock-AF_INET Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(&smc->clcsock_release_lock); *** DEADLOCK *** 1 lock held by syz-executor318/5823: #0: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1623 [inline] #0: ffff888032790258 (sk_lock-AF_INET){+.+.}-{0:0}, at: smc_sendmsg+0x55/0x530 net/smc/af_smc.c:2772 stack backtrace: CPU: 1 UID: 0 PID: 5823 Comm: syz-executor318 Not tainted 6.13.0-rc6-syzkaller-00133-g47e55e4b410f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 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+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 smc_switch_to_fallback+0x35/0xd90 net/smc/af_smc.c:903 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2778 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: 0033:0x7feda03bb3e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feda0376208 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007feda0445328 RCX: 00007feda03bb3e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007feda0445320 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200007fd R11: 0000000000000246 R12: 00007feda044532c R13: 00007feda0412074 R14: 0000840000000002 R15: 4000000000000001