Extracting prog: 40.480457835s Minimizing prog: 12m15.527219961s Simplifying prog options: 3m2.294342836s Extracting C: 1m9.780354421s Simplifying C: 0s extracting reproducer from 44 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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program crashed: possible deadlock in smc_release single: successfully extracted reproducer found reproducer with 8 syscalls minimizing guilty program testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6 detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(0xffffffffffffffff, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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}}): close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: close(0xffffffffffffffff) socket(0x2b, 0x1, 0x1) bind$inet6(0xffffffffffffffff, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(0xffffffffffffffff, 0x0) r0 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r0, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, 0x0, 0x0) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x0, 0x0, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet program did not crash simplifying guilty program options testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {Threaded:true 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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash testing program (duration=53.391861372s, {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$inet6_tcp-close-socket-bind$inet6-listen-socket$inet_mptcp-pselect6-connect$inet detailed listing: executing program 0: r0 = socket$inet6_tcp(0xa, 0x1, 0x0) close(r0) socket(0x2b, 0x1, 0x1) bind$inet6(r0, &(0x7f0000000040)={0xa, 0x4e22, 0x0, @empty}, 0x1c) listen(r0, 0x0) r1 = socket$inet_mptcp(0x2, 0x1, 0x106) pselect6(0x40, &(0x7f0000000140)={0x9, 0x100000001, 0xf, 0xb, 0x9, 0x81, 0x60a82359}, 0x0, 0x0, 0x0, 0x0) connect$inet(r1, &(0x7f0000000000)={0x2, 0x4e22, @local}, 0x10) program did not crash reproducing took 17m8.082395836s repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc1-syzkaller-g2014c95afece #0 Not tainted ------------------------------------------------------ syz.3.31/7618 is trying to acquire lock: ffff0000f1834e50 ((work_completion)(&new_smc->smc_listen_work)){+.+.}-{0:0}, at: touch_work_lockdep_map+0x74/0x11c kernel/workqueue.c:3920 but task is already holding lock: ffff0000f1831958 (sk_lock-AF_SMC/1){+.+.}-{0:0}, at: smc_release+0x1e8/0x528 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_SMC/1){+.+.}-{0:0}: lock_sock_nested+0x5c/0x11c net/core/sock.c:3645 smc_listen_out+0x114/0x3c4 net/smc/af_smc.c:1908 smc_listen_work+0x1e4/0x1078 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #0 ((work_completion)(&new_smc->smc_listen_work)){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 touch_work_lockdep_map+0x9c/0x11c kernel/workqueue.c:3920 start_flush_work kernel/workqueue.c:4174 [inline] __flush_work+0x57c/0x958 kernel/workqueue.c:4206 __cancel_work_sync kernel/workqueue.c:4362 [inline] cancel_work_sync+0xc4/0x120 kernel/workqueue.c:4399 smc_clcsock_release+0x64/0xec net/smc/smc_close.c:29 __smc_release+0x55c/0x700 net/smc/af_smc.c:301 smc_close_non_accepted+0xd8/0x260 net/smc/af_smc.c:1839 smc_close_cleanup_listen net/smc/smc_close.c:45 [inline] smc_close_active+0x9bc/0xd20 net/smc/smc_close.c:225 __smc_release+0xa0/0x700 net/smc/af_smc.c:277 smc_release+0x260/0x528 net/smc/af_smc.c:344 __sock_release net/socket.c:642 [inline] sock_close+0xa4/0x1e8 net/socket.c:1393 __fput+0x340/0x760 fs/file_table.c:448 ____fput+0x20/0x30 fs/file_table.c:476 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_SMC/1); lock((work_completion)(&new_smc->smc_listen_work)); lock(sk_lock-AF_SMC/1); lock((work_completion)(&new_smc->smc_listen_work)); *** DEADLOCK *** 3 locks held by syz.3.31/7618: #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:641 [inline] #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x80/0x1e8 net/socket.c:1393 #1: ffff0000f1831958 (sk_lock-AF_SMC/1){+.+.}-{0:0}, at: smc_release+0x1e8/0x528 #2: ffff80008fdb1ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:336 stack backtrace: CPU: 1 UID: 0 PID: 7618 Comm: syz.3.31 Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208 check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 touch_work_lockdep_map+0x9c/0x11c kernel/workqueue.c:3920 start_flush_work kernel/workqueue.c:4174 [inline] __flush_work+0x57c/0x958 kernel/workqueue.c:4206 __cancel_work_sync kernel/workqueue.c:4362 [inline] cancel_work_sync+0xc4/0x120 kernel/workqueue.c:4399 smc_clcsock_release+0x64/0xec net/smc/smc_close.c:29 __smc_release+0x55c/0x700 net/smc/af_smc.c:301 smc_close_non_accepted+0xd8/0x260 net/smc/af_smc.c:1839 smc_close_cleanup_listen net/smc/smc_close.c:45 [inline] smc_close_active+0x9bc/0xd20 net/smc/smc_close.c:225 __smc_release+0xa0/0x700 net/smc/af_smc.c:277 smc_release+0x260/0x528 net/smc/af_smc.c:344 __sock_release net/socket.c:642 [inline] sock_close+0xa4/0x1e8 net/socket.c:1393 __fput+0x340/0x760 fs/file_table.c:448 ____fput+0x20/0x30 fs/file_table.c:476 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 final repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc1-syzkaller-g2014c95afece #0 Not tainted ------------------------------------------------------ syz.3.31/7618 is trying to acquire lock: ffff0000f1834e50 ((work_completion)(&new_smc->smc_listen_work)){+.+.}-{0:0}, at: touch_work_lockdep_map+0x74/0x11c kernel/workqueue.c:3920 but task is already holding lock: ffff0000f1831958 (sk_lock-AF_SMC/1){+.+.}-{0:0}, at: smc_release+0x1e8/0x528 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_SMC/1){+.+.}-{0:0}: lock_sock_nested+0x5c/0x11c net/core/sock.c:3645 smc_listen_out+0x114/0x3c4 net/smc/af_smc.c:1908 smc_listen_work+0x1e4/0x1078 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #0 ((work_completion)(&new_smc->smc_listen_work)){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 touch_work_lockdep_map+0x9c/0x11c kernel/workqueue.c:3920 start_flush_work kernel/workqueue.c:4174 [inline] __flush_work+0x57c/0x958 kernel/workqueue.c:4206 __cancel_work_sync kernel/workqueue.c:4362 [inline] cancel_work_sync+0xc4/0x120 kernel/workqueue.c:4399 smc_clcsock_release+0x64/0xec net/smc/smc_close.c:29 __smc_release+0x55c/0x700 net/smc/af_smc.c:301 smc_close_non_accepted+0xd8/0x260 net/smc/af_smc.c:1839 smc_close_cleanup_listen net/smc/smc_close.c:45 [inline] smc_close_active+0x9bc/0xd20 net/smc/smc_close.c:225 __smc_release+0xa0/0x700 net/smc/af_smc.c:277 smc_release+0x260/0x528 net/smc/af_smc.c:344 __sock_release net/socket.c:642 [inline] sock_close+0xa4/0x1e8 net/socket.c:1393 __fput+0x340/0x760 fs/file_table.c:448 ____fput+0x20/0x30 fs/file_table.c:476 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_SMC/1); lock((work_completion)(&new_smc->smc_listen_work)); lock(sk_lock-AF_SMC/1); lock((work_completion)(&new_smc->smc_listen_work)); *** DEADLOCK *** 3 locks held by syz.3.31/7618: #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:641 [inline] #0: ffff0000db3ae208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x80/0x1e8 net/socket.c:1393 #1: ffff0000f1831958 (sk_lock-AF_SMC/1){+.+.}-{0:0}, at: smc_release+0x1e8/0x528 #2: ffff80008fdb1ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:336 stack backtrace: CPU: 1 UID: 0 PID: 7618 Comm: syz.3.31 Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208 check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 touch_work_lockdep_map+0x9c/0x11c kernel/workqueue.c:3920 start_flush_work kernel/workqueue.c:4174 [inline] __flush_work+0x57c/0x958 kernel/workqueue.c:4206 __cancel_work_sync kernel/workqueue.c:4362 [inline] cancel_work_sync+0xc4/0x120 kernel/workqueue.c:4399 smc_clcsock_release+0x64/0xec net/smc/smc_close.c:29 __smc_release+0x55c/0x700 net/smc/af_smc.c:301 smc_close_non_accepted+0xd8/0x260 net/smc/af_smc.c:1839 smc_close_cleanup_listen net/smc/smc_close.c:45 [inline] smc_close_active+0x9bc/0xd20 net/smc/smc_close.c:225 __smc_release+0xa0/0x700 net/smc/af_smc.c:277 smc_release+0x260/0x528 net/smc/af_smc.c:344 __sock_release net/socket.c:642 [inline] sock_close+0xa4/0x1e8 net/socket.c:1393 __fput+0x340/0x760 fs/file_table.c:448 ____fput+0x20/0x30 fs/file_table.c:476 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600