Extracting prog: 23m26.422538418s Minimizing prog: 53m43.236731898s Simplifying prog options: 0s Extracting C: 3m8.857741232s Simplifying C: 58m32.35717669s extracting reproducer from 46 programs testing a last program of every proc single: executing 11 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$IORING_OFF_SQ_RING-syz_mount_image$ext4-openat-prlimit64-sched_setscheduler-getpid-sched_setscheduler-mmap-socketpair$unix-connect$unix-sendmmsg$unix-recvmmsg-socket$nl_generic-bpf$BPF_PROG_RAW_TRACEPOINT_LOAD-syz_open_procfs-fchdir-openat$cgroup_ro-mount-syz_open_procfs-mount$9p_fd-syz_open_dev$sndpcmc-ioctl$SNDRV_PCM_IOCTL_HW_PARAMS-ioctl$SNDRV_PCM_IOCTL_REWIND-ioctl$SNDRV_PCM_IOCTL_DRAIN-ioctl$SNDRV_PCM_IOCTL_REWIND-openat$incfs detailed listing: executing program 0: mmap$IORING_OFF_SQ_RING(0x110c230000, 0x8000002, 0x2000007, 0x401d031, 0xffffffffffffffff, 0x0) syz_mount_image$ext4(&(0x7f0000000580)='ext3\x00', &(0x7f0000000040)='./bus\x00', 0x1208002, &(0x7f0000000bc0)={[{@grpquota}, {@discard}, {@resuid}, {@debug}, {@noquota}, {@grpjquota_path={'grpjquota', 0x3d, './bus'}}, {@acl}, {@noauto_da_alloc}]}, 0x1, 0x5d8, &(0x7f00000005c0)="$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") openat(0xffffffffffffff9c, 0x0, 0x84c42, 0x1fa) prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x8b}, 0x0) sched_setscheduler(0x0, 0x2, &(0x7f0000000240)=0x8) r0 = getpid() sched_setscheduler(r0, 0x2, &(0x7f0000000200)=0x7) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f05ebbee7, 0x8031, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f00000000c0)={0xffffffffffffffff, 0xffffffffffffffff}) connect$unix(r1, &(0x7f000057eff8)=@file={0x0, './file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'}, 0x6e) sendmmsg$unix(r2, &(0x7f0000000000), 0x651, 0x0) recvmmsg(r1, &(0x7f00000000c0), 0x10106, 0x2, 0x0) socket$nl_generic(0x10, 0x3, 0x10) bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f0000001580)={0x0, 0x5, &(0x7f0000000080)=ANY=[@ANYBLOB="1800d10000300000"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, 0x0, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x7}, 0x94) r3 = syz_open_procfs(0x0, &(0x7f0000000300)='task\x00') fchdir(r3) openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0) mount(0x0, 0x0, 0x0, 0x0, 0x0) syz_open_procfs(0x0, 0x0) mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, 0x0) r4 = syz_open_dev$sndpcmc(&(0x7f00000001a0), 0x0, 0x2) ioctl$SNDRV_PCM_IOCTL_HW_PARAMS(r4, 0xc2604111, &(0x7f0000000c00)={0xe9, [[0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0x6, 0xffffffff, 0xffffffff, 0xffffffff], [0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0x3], [0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffdfff, 0xffffffff, 0xffffffff]], '\x00', [{0xd, 0x10, 0x0, 0x0, 0x1}, {0x20, 0x20, 0x0, 0x0, 0x1}, {0x2, 0x4, 0x0, 0x0, 0x1}, {0xac44, 0xac44, 0x0, 0x0, 0x1}, {0x1388, 0x186a0, 0x0, 0x0, 0x1}, {0x100, 0x400, 0x0, 0x0, 0x1}, {0x400, 0x1000, 0x0, 0x0, 0x1}, {0x2, 0x8, 0x0, 0x0, 0x1}, {0x2710, 0xf4240, 0x0, 0x0, 0x1}, {0x400, 0x1000, 0x0, 0x0, 0x1}, {0x1000, 0x4000, 0x0, 0x0, 0x1}, {0x0, 0xf4240, 0x0, 0x0, 0x1}]}) ioctl$SNDRV_PCM_IOCTL_REWIND(r4, 0x40084146, 0x0) ioctl$SNDRV_PCM_IOCTL_DRAIN(r4, 0x4144, 0x0) ioctl$SNDRV_PCM_IOCTL_REWIND(r4, 0x40084146, &(0x7f0000000200)=0x9) openat$incfs(0xffffffffffffff9c, &(0x7f0000000140)='.pending_reads\x00', 0x1a10c1, 0x9c37611dc13d0da6) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$sock_SIOCGIFINDEX-socket$inet_tcp-setsockopt$inet_tcp_int-bind$inet-connect$inet-setsockopt$inet_tcp_TCP_REPAIR_OPTIONS-setsockopt$inet_tcp_TCP_CONGESTION-setsockopt$inet_tcp_TCP_REPAIR-sendto$inet-recvfrom$inet detailed listing: executing program 0: ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, 0x0) r0 = socket$inet_tcp(0x2, 0x1, 0x0) setsockopt$inet_tcp_int(r0, 0x6, 0x210000000013, &(0x7f00000000c0)=0x100000001, 0x4) bind$inet(r0, &(0x7f0000000080)={0x2, 0x4e21, @multicast1}, 0x10) connect$inet(r0, &(0x7f0000000180)={0x2, 0x4e21, @dev={0xac, 0x14, 0x14, 0x42}}, 0x10) setsockopt$inet_tcp_TCP_REPAIR_OPTIONS(r0, 0x6, 0x16, &(0x7f0000000000)=[@mss, @sack_perm, @window={0x3, 0x7}, @mss={0x2, 0xfff}, @window={0x3, 0x0, 0x401}, @window], 0x20000000000000e4) setsockopt$inet_tcp_TCP_CONGESTION(r0, 0x6, 0xd, &(0x7f0000000040)='htcp', 0x4) setsockopt$inet_tcp_TCP_REPAIR(r0, 0x6, 0x13, &(0x7f00000001c0), 0x4) sendto$inet(r0, &(0x7f0000000000), 0xffffffffffffff94, 0xb, 0x0, 0x0) recvfrom$inet(r0, &(0x7f0000000080)=""/8, 0xfffffffffffffd0b, 0xc9100120, 0x0, 0xfffffffffffffd25) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prlimit64-sched_setscheduler-getpid-sched_setscheduler-syz_open_dev$vcsa-mmap-socketpair$unix-connect$unix-sendmmsg$unix-recvmmsg-sched_setscheduler-mkdirat-mount-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-openat-munmap-fsopen-fsconfig$FSCONFIG_CMD_CREATE-fsmount-openat$cgroup_procs-pread64 detailed listing: executing program 0: prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x84}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000240)=0x7) r0 = getpid() sched_setscheduler(r0, 0x2, &(0x7f0000000200)=0x7) r1 = syz_open_dev$vcsa(0x0, 0x7, 0x80280) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, r1, 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000200)={0xffffffffffffffff, 0xffffffffffffffff}) connect$unix(r2, &(0x7f000057eff8)=@abs, 0x6e) sendmmsg$unix(r3, &(0x7f0000000000), 0x651, 0x0) recvmmsg(r2, &(0x7f00000000c0), 0x10106, 0x2, 0x0) sched_setscheduler(0x0, 0x2, &(0x7f0000000000)=0x6) mkdirat(0xffffffffffffff9c, &(0x7f00000001c0)='./mysys\x00', 0x1ff) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x1d, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:05.0/resource0\x00', 0x2, 0x0) munmap(&(0x7f0000002000/0x4000)=nil, 0x4000) r4 = fsopen(&(0x7f0000001340)='cgroup2\x00', 0x0) fsconfig$FSCONFIG_CMD_CREATE(r4, 0x6, 0x0, 0x0, 0x0) r5 = fsmount(r4, 0x1, 0x0) r6 = openat$cgroup_procs(r5, &(0x7f0000000180)='cgroup.procs\x00', 0x2, 0x0) pread64(r6, &(0x7f00000000c0)=""/30, 0x1e, 0x800000000004) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program crashed: INFO: task hung in hidp_session_remove single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) ioctl$sock_bt_hidp_HIDPCONNADD(0xffffffffffffffff, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: connect$bt_l2cap(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r0 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r0, 0x400448c8, &(0x7f0000000280)={0xffffffffffffffff, 0xffffffffffffffff, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, 0x0, 0x0) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0x0, 0x0, 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0x0, &(0x7f0000000340), 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in l2cap_info_timeout a never seen crash title: INFO: task hung in l2cap_info_timeout, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in l2cap_info_timeout a never seen crash title: INFO: task hung in l2cap_info_timeout, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hidp_session_remove testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD program crashed: INFO: task hung in hci_conn_hash_flush a never seen crash title: INFO: task hung in hci_conn_hash_flush, ignore testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program crashed: INFO: task hung in hidp_session_remove validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program crashed: INFO: task hung in hidp_session_remove validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-connect$bt_l2cap-syz_init_net_socket$bt_hidp-ioctl$sock_bt_hidp_HIDPCONNADD detailed listing: executing program 0: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0) connect$bt_l2cap(r0, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x7ff}, 0xe) r1 = syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) ioctl$sock_bt_hidp_HIDPCONNADD(r1, 0x400448c8, &(0x7f0000000280)={r0, r0, 0xc, 0xffffffffffffff18, &(0x7f0000000340)='\x00', 0xb, 0x1, 0x16c0, 0x4155, 0x9, 0x1, 0x1, 'syz0\x00'}) program crashed: INFO: task hung in hidp_session_remove validation run: crashed=true reproducing took 2h28m50.274375828s repro crashed as (corrupted=false): INFO: task khidpd_16c04155:5977 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khidpd_16c04155 state:D stack:28616 pid:5977 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_timeout+0xc1/0x2d0 kernel/time/timer.c:2144 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x2c6/0x5a0 kernel/sched/completion.c:148 __flush_work+0x92f/0xac0 kernel/workqueue.c:3475 __cancel_work_timer+0x3f8/0x560 kernel/workqueue.c:3562 hidp_session_remove+0xae/0x2b0 net/bluetooth/hidp/core.c:1198 l2cap_unregister_user+0x13f/0x160 net/bluetooth/l2cap_core.c:1766 hidp_session_thread+0x194c/0x19d0 net/bluetooth/hidp/core.c:1334 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 INFO: task syz.3.38:6003 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.38 state:D stack:27560 pid:6003 ppid:5899 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0x7fd/0xe30 net/bluetooth/l2cap_core.c:7318 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5b8659e159 RSP: 002b:00007ffc194ec638 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f5b86825fa0 RCX: 00007f5b8659e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f5b8663506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5b86825fac R14: 00007f5b86825fa0 R15: 00007f5b86825fa0 INFO: task syz.1.39:6005 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.39 state:D stack:27560 pid:6005 ppid:5907 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f210959e159 RSP: 002b:00007ffd2fefca48 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f2109825fa0 RCX: 00007f210959e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f210963506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2109825fac R14: 00007f2109825fa0 R15: 00007f2109825fa0 INFO: task syz.2.19:6009 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:26664 pid:6009 ppid:5906 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5915b9e159 RSP: 002b:00007ffc1184e968 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f5915e25fa0 RCX: 00007f5915b9e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f5915c3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5915e25fac R14: 00007f5915e25fa0 R15: 00007f5915e25fa0 INFO: task syz.0.17:6010 blocked for more than 147 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26664 pid:6010 ppid:5900 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fcb7ed9e159 RSP: 002b:00007ffc5a96c048 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fcb7f025fa0 RCX: 00007fcb7ed9e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007fcb7ee3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcb7f025fac R14: 00007fcb7f025fa0 R15: 00007fcb7f025fa0 Showing all locks held in the system: 2 locks held by kworker/u4:0/11: 1 lock held by khungtaskd/29: #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6669 4 locks held by kworker/u4:2/33: 3 locks held by kworker/u4:5/60: 3 locks held by kworker/0:2/789: 2 locks held by getty/5533: #0: ffff88802d82c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x428/0x1370 drivers/tty/n_tty.c:2217 9 locks held by kworker/0:4/5945: 2 locks held by khidpd_16c04155/5977: #0: ffff88802166e338 (&conn->lock#2){+.+.}-{3:3}, at: l2cap_unregister_user+0x35/0x160 net/bluetooth/l2cap_core.c:1760 #1: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_remove+0x2c/0x2b0 net/bluetooth/hidp/core.c:1185 2 locks held by syz.3.38/6003: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 #1: ffff88802166e338 (&conn->lock#2){+.+.}-{3:3}, at: l2cap_chan_connect+0x7fd/0xe30 net/bluetooth/l2cap_core.c:7318 1 lock held by syz.1.39/6005: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.2.19/6009: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.0.17/6010: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.4.40/6091: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.7.43/6092: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.5.41/6093: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.6.42/6094: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.8.44/6146: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.9.45/6172: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.1.46/6173: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.3.47/6174: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.0.48/6191: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.2.49/6253: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.4.50/6254: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.6.51/6259: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.7.52/6271: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.5.53/6348: #0: ffffffff8e56da30 ( hidp_session_sem ){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.8.54/6351: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.9.55/6356: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.1.56/6358: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 3 locks held by modprobe/6366: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf59/0xfa0 kernel/hung_task.c:379 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 33 Comm: kworker/u4:2 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55 Code: 65 8b 05 5d f7 70 75 65 8b 0d 52 f7 70 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 RSP: 0018:ffffc90000a9f7c8 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffff888018e90000 RCX: ae03fba973fda400 RDX: dffffc0000000000 RSI: ffffffff8acad9c0 RDI: ffffffff8b1d4020 RBP: ffffc90000a9f8a8 R08: ffffffff8e8c626f R09: 1ffffffff1d18c4d R10: dffffc0000000000 R11: fffffbfff1d18c4e R12: dffffc0000000000 R13: ffff8880b8f39050 R14: 4b0e257b5fd8d71b R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10352b79b0 CR3: 000000000cf32000 CR4: 00000000003506e0 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline] lockdep_hardirqs_on_prepare+0x1b6/0x7d0 kernel/locking/lockdep.c:4386 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 crng_make_state+0x350/0x700 drivers/char/random.c:365 _get_random_bytes+0x100/0x250 drivers/char/random.c:378 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:775 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x5fe/0xa90 drivers/net/netdevsim/dev.c:851 process_one_work kernel/workqueue.c:2657 [inline] process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 final repro crashed as (corrupted=false): INFO: task khidpd_16c04155:5977 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khidpd_16c04155 state:D stack:28616 pid:5977 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_timeout+0xc1/0x2d0 kernel/time/timer.c:2144 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x2c6/0x5a0 kernel/sched/completion.c:148 __flush_work+0x92f/0xac0 kernel/workqueue.c:3475 __cancel_work_timer+0x3f8/0x560 kernel/workqueue.c:3562 hidp_session_remove+0xae/0x2b0 net/bluetooth/hidp/core.c:1198 l2cap_unregister_user+0x13f/0x160 net/bluetooth/l2cap_core.c:1766 hidp_session_thread+0x194c/0x19d0 net/bluetooth/hidp/core.c:1334 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 INFO: task syz.3.38:6003 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.38 state:D stack:27560 pid:6003 ppid:5899 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0x7fd/0xe30 net/bluetooth/l2cap_core.c:7318 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5b8659e159 RSP: 002b:00007ffc194ec638 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f5b86825fa0 RCX: 00007f5b8659e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f5b8663506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5b86825fac R14: 00007f5b86825fa0 R15: 00007f5b86825fa0 INFO: task syz.1.39:6005 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.39 state:D stack:27560 pid:6005 ppid:5907 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f210959e159 RSP: 002b:00007ffd2fefca48 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f2109825fa0 RCX: 00007f210959e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f210963506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2109825fac R14: 00007f2109825fa0 R15: 00007f2109825fa0 INFO: task syz.2.19:6009 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:26664 pid:6009 ppid:5906 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5915b9e159 RSP: 002b:00007ffc1184e968 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f5915e25fa0 RCX: 00007f5915b9e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007f5915c3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5915e25fac R14: 00007f5915e25fa0 R15: 00007f5915e25fa0 INFO: task syz.0.17:6010 blocked for more than 147 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26664 pid:6010 ppid:5900 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x15ae/0x4660 kernel/sched/core.c:6701 schedule+0xbd/0x170 kernel/sched/core.c:6775 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x673/0xc80 kernel/locking/mutex.c:747 l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 l2cap_sock_connect+0x586/0x760 net/bluetooth/l2cap_sock.c:257 __sys_connect_file net/socket.c:2057 [inline] __sys_connect+0x3da/0x470 net/socket.c:2074 __do_sys_connect net/socket.c:2084 [inline] __se_sys_connect net/socket.c:2081 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2081 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fcb7ed9e159 RSP: 002b:00007ffc5a96c048 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fcb7f025fa0 RCX: 00007fcb7ed9e159 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007fcb7ee3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcb7f025fac R14: 00007fcb7f025fa0 R15: 00007fcb7f025fa0 Showing all locks held in the system: 2 locks held by kworker/u4:0/11: 1 lock held by khungtaskd/29: #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6669 4 locks held by kworker/u4:2/33: 3 locks held by kworker/u4:5/60: 3 locks held by kworker/0:2/789: 2 locks held by getty/5533: #0: ffff88802d82c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x428/0x1370 drivers/tty/n_tty.c:2217 9 locks held by kworker/0:4/5945: 2 locks held by khidpd_16c04155/5977: #0: ffff88802166e338 (&conn->lock#2){+.+.}-{3:3}, at: l2cap_unregister_user+0x35/0x160 net/bluetooth/l2cap_core.c:1760 #1: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_remove+0x2c/0x2b0 net/bluetooth/hidp/core.c:1185 2 locks held by syz.3.38/6003: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 #1: ffff88802166e338 (&conn->lock#2){+.+.}-{3:3}, at: l2cap_chan_connect+0x7fd/0xe30 net/bluetooth/l2cap_core.c:7318 1 lock held by syz.1.39/6005: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.2.19/6009: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.0.17/6010: #0: ffff8880756140b8 (&hdev->lock){+.+.}-{3:3}, at: l2cap_chan_connect+0xfc/0xe30 net/bluetooth/l2cap_core.c:7195 1 lock held by syz.4.40/6091: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.7.43/6092: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.5.41/6093: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.6.42/6094: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.8.44/6146: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.9.45/6172: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.1.46/6173: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.3.47/6174: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.0.48/6191: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.2.49/6253: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.4.50/6254: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.6.51/6259: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.7.52/6271: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.5.53/6348: #0: ffffffff8e56da30 ( hidp_session_sem ){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.8.54/6351: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.9.55/6356: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 1 lock held by syz.1.56/6358: #0: ffffffff8e56da30 (hidp_session_sem){++++}-{3:3}, at: hidp_session_find+0x1a/0x100 net/bluetooth/hidp/core.c:1046 3 locks held by modprobe/6366: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf59/0xfa0 kernel/hung_task.c:379 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 33 Comm: kworker/u4:2 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55 Code: 65 8b 05 5d f7 70 75 65 8b 0d 52 f7 70 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 RSP: 0018:ffffc90000a9f7c8 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffff888018e90000 RCX: ae03fba973fda400 RDX: dffffc0000000000 RSI: ffffffff8acad9c0 RDI: ffffffff8b1d4020 RBP: ffffc90000a9f8a8 R08: ffffffff8e8c626f R09: 1ffffffff1d18c4d R10: dffffc0000000000 R11: fffffbfff1d18c4e R12: dffffc0000000000 R13: ffff8880b8f39050 R14: 4b0e257b5fd8d71b R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10352b79b0 CR3: 000000000cf32000 CR4: 00000000003506e0 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline] lockdep_hardirqs_on_prepare+0x1b6/0x7d0 kernel/locking/lockdep.c:4386 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 crng_make_state+0x350/0x700 drivers/char/random.c:365 _get_random_bytes+0x100/0x250 drivers/char/random.c:378 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:775 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x5fe/0xa90 drivers/net/netdevsim/dev.c:851 process_one_work kernel/workqueue.c:2657 [inline] process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293