Extracting prog: 4m17.011020317s
Minimizing prog: 1h30m41.019892221s
Simplifying prog options: 0s
Extracting C: 2m26.087506706s
Simplifying C: 46m28.003190209s


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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
single: successfully extracted reproducer
found reproducer with 9 syscalls
minimizing guilty program
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
read(0xffffffffffffffff, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
bind$bt_l2cap(0xffffffffffffffff, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(0xffffffffffffffff, 0xa)
r0 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r0, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, 0x0, 0x0)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, 0x0, 0x0)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(0x0, 0x0)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(0x0, 0x0)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(0x0, 0x0)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
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: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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
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:true Repeat:true RepeatTimes:0 Procs:1 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0)
bind$bt_l2cap(r0, &(0x7f0000000000)={0x1f, 0x0, @any, 0x3}, 0xe)
listen(r0, 0xa)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
read(r1, &(0x7f0000000800)=""/100, 0x64)
syz_emit_vhci(&(0x7f0000000100)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_request={{0x4, 0xa}, {@fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, '\x00', 0x1}}}, 0xd)
syz_emit_vhci(&(0x7f0000000200)=@HCI_EVENT_PKT={0x4, @hci_ev_conn_complete={{0x3, 0xb}, {0x0, 0xc9, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x10}, 0x1}}}, 0xe)
syz_emit_vhci(&(0x7f0000000400)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_features={{0xb, 0xb}, {0x0, 0xc9}}}, 0xe)
syz_emit_vhci(&(0x7f0000000300)=@HCI_EVENT_PKT={0x4, @hci_ev_disconn_complete={{0x5, 0x4}, {0x0, 0xc9, 0x16}}}, 0x7)

program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
validation run: crashed=true
reproducing took 2h31m18.95574329s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: null-ptr-deref in refcount_read include/linux/refcount.h:170 [inline]
BUG: KASAN: null-ptr-deref in __refcount_add_not_zero include/linux/refcount.h:176 [inline]
BUG: KASAN: null-ptr-deref in __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
BUG: KASAN: null-ptr-deref in refcount_inc_not_zero include/linux/refcount.h:335 [inline]
BUG: KASAN: null-ptr-deref in kref_get_unless_zero include/linux/kref.h:133 [inline]
BUG: KASAN: null-ptr-deref in l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
Read of size 4 at addr 0000000000000008 by task syz.0.160/5373

CPU: 0 UID: 0 PID: 5373 Comm: syz.0.160 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_report+0x58/0x84 mm/kasan/report.c:485
 kasan_report+0x8c/0xc4 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x17c/0x1ac mm/kasan/generic.c:200
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 refcount_read include/linux/refcount.h:170 [inline]
 __refcount_add_not_zero include/linux/refcount.h:176 [inline]
 __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
 refcount_inc_not_zero include/linux/refcount.h:335 [inline]
 kref_get_unless_zero include/linux/kref.h:133 [inline]
 l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
 l2cap_sock_cleanup_listen+0x94/0x508 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x68/0x208 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xa0/0x1d4 net/socket.c:710
 sock_close+0x24/0x38 net/socket.c:1501
 __fput+0x338/0x74c fs/file_table.c:512
 ____fput+0x20/0x30 fs/file_table.c:540
 task_work_run+0x1cc/0x25c kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x10c/0x17c kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000001
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 5373 Comm: syz.0.160 Tainted: G    B               syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
pc : atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
pc : refcount_read include/linux/refcount.h:170 [inline]
pc : __refcount_add_not_zero include/linux/refcount.h:176 [inline]
pc : __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
pc : refcount_inc_not_zero include/linux/refcount.h:335 [inline]
pc : kref_get_unless_zero include/linux/kref.h:133 [inline]
pc : l2cap_chan_hold_unless_zero+0x9c/0x264 net/bluetooth/l2cap_core.c:511
lr : instrument_atomic_read include/linux/instrumented.h:82 [inline]
lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
lr : refcount_read include/linux/refcount.h:170 [inline]
lr : __refcount_add_not_zero include/linux/refcount.h:176 [inline]
lr : __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
lr : refcount_inc_not_zero include/linux/refcount.h:335 [inline]
lr : kref_get_unless_zero include/linux/kref.h:133 [inline]
lr : l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
sp : ffff800099dc7ac0
x29: ffff800099dc7b20 x28: dfff800000000000 x27: 000000000c2e0003
x26: ffff0000c1e1c690 x25: ffff0000c5370000 x24: ffff8000879d8560
x23: 0000000000000008 x22: ffff800099dc7ac0 x21: ffff7000133b8f58
x20: dfff800000000000 x19: 0000000000000000 x18: 00000000ffffffff
x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d
x14: 3d3d3d3d3d3d3d3d x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: ffff700011456b21 x9 : 0000000000000000
x8 : 0000000000000001 x7 : 0000000000000000 x6 : ffff80008048ce54
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f6ad8
x2 : 0000000000000000 x1 : ffff0000dd3f0000 x0 : 0000000000000000
Call trace:
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P)
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline] (P)
 refcount_read include/linux/refcount.h:170 [inline] (P)
 __refcount_add_not_zero include/linux/refcount.h:176 [inline] (P)
 __refcount_inc_not_zero include/linux/refcount.h:317 [inline] (P)
 refcount_inc_not_zero include/linux/refcount.h:335 [inline] (P)
 kref_get_unless_zero include/linux/kref.h:133 [inline] (P)
 l2cap_chan_hold_unless_zero+0x9c/0x264 net/bluetooth/l2cap_core.c:511 (P)
 l2cap_sock_cleanup_listen+0x94/0x508 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x68/0x208 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xa0/0x1d4 net/socket.c:710
 sock_close+0x24/0x38 net/socket.c:1501
 __fput+0x338/0x74c fs/file_table.c:512
 ____fput+0x20/0x30 fs/file_table.c:540
 task_work_run+0x1cc/0x25c kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x10c/0x17c kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Code: 91002277 390012a8 96c04c2e d343fee8 (38f46908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	91002277 	add	x23, x19, #0x8
   4:	390012a8 	strb	w8, [x21, #4]
   8:	96c04c2e 	bl	0xfffffffffb0130c0
   c:	d343fee8 	lsr	x8, x23, #3
* 10:	38f46908 	ldrsb	w8, [x8, x20] <-- trapping instruction

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: null-ptr-deref in refcount_read include/linux/refcount.h:170 [inline]
BUG: KASAN: null-ptr-deref in __refcount_add_not_zero include/linux/refcount.h:176 [inline]
BUG: KASAN: null-ptr-deref in __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
BUG: KASAN: null-ptr-deref in refcount_inc_not_zero include/linux/refcount.h:335 [inline]
BUG: KASAN: null-ptr-deref in kref_get_unless_zero include/linux/kref.h:133 [inline]
BUG: KASAN: null-ptr-deref in l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
Read of size 4 at addr 0000000000000008 by task syz.0.160/5373

CPU: 0 UID: 0 PID: 5373 Comm: syz.0.160 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_report+0x58/0x84 mm/kasan/report.c:485
 kasan_report+0x8c/0xc4 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x17c/0x1ac mm/kasan/generic.c:200
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 refcount_read include/linux/refcount.h:170 [inline]
 __refcount_add_not_zero include/linux/refcount.h:176 [inline]
 __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
 refcount_inc_not_zero include/linux/refcount.h:335 [inline]
 kref_get_unless_zero include/linux/kref.h:133 [inline]
 l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
 l2cap_sock_cleanup_listen+0x94/0x508 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x68/0x208 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xa0/0x1d4 net/socket.c:710
 sock_close+0x24/0x38 net/socket.c:1501
 __fput+0x338/0x74c fs/file_table.c:512
 ____fput+0x20/0x30 fs/file_table.c:540
 task_work_run+0x1cc/0x25c kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x10c/0x17c kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000001
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 5373 Comm: syz.0.160 Tainted: G    B               syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
pc : atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
pc : refcount_read include/linux/refcount.h:170 [inline]
pc : __refcount_add_not_zero include/linux/refcount.h:176 [inline]
pc : __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
pc : refcount_inc_not_zero include/linux/refcount.h:335 [inline]
pc : kref_get_unless_zero include/linux/kref.h:133 [inline]
pc : l2cap_chan_hold_unless_zero+0x9c/0x264 net/bluetooth/l2cap_core.c:511
lr : instrument_atomic_read include/linux/instrumented.h:82 [inline]
lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
lr : refcount_read include/linux/refcount.h:170 [inline]
lr : __refcount_add_not_zero include/linux/refcount.h:176 [inline]
lr : __refcount_inc_not_zero include/linux/refcount.h:317 [inline]
lr : refcount_inc_not_zero include/linux/refcount.h:335 [inline]
lr : kref_get_unless_zero include/linux/kref.h:133 [inline]
lr : l2cap_chan_hold_unless_zero+0x98/0x264 net/bluetooth/l2cap_core.c:511
sp : ffff800099dc7ac0
x29: ffff800099dc7b20 x28: dfff800000000000 x27: 000000000c2e0003
x26: ffff0000c1e1c690 x25: ffff0000c5370000 x24: ffff8000879d8560
x23: 0000000000000008 x22: ffff800099dc7ac0 x21: ffff7000133b8f58
x20: dfff800000000000 x19: 0000000000000000 x18: 00000000ffffffff
x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d
x14: 3d3d3d3d3d3d3d3d x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: ffff700011456b21 x9 : 0000000000000000
x8 : 0000000000000001 x7 : 0000000000000000 x6 : ffff80008048ce54
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f6ad8
x2 : 0000000000000000 x1 : ffff0000dd3f0000 x0 : 0000000000000000
Call trace:
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P)
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline] (P)
 refcount_read include/linux/refcount.h:170 [inline] (P)
 __refcount_add_not_zero include/linux/refcount.h:176 [inline] (P)
 __refcount_inc_not_zero include/linux/refcount.h:317 [inline] (P)
 refcount_inc_not_zero include/linux/refcount.h:335 [inline] (P)
 kref_get_unless_zero include/linux/kref.h:133 [inline] (P)
 l2cap_chan_hold_unless_zero+0x9c/0x264 net/bluetooth/l2cap_core.c:511 (P)
 l2cap_sock_cleanup_listen+0x94/0x508 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x68/0x208 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xa0/0x1d4 net/socket.c:710
 sock_close+0x24/0x38 net/socket.c:1501
 __fput+0x338/0x74c fs/file_table.c:512
 ____fput+0x20/0x30 fs/file_table.c:540
 task_work_run+0x1cc/0x25c kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x10c/0x17c kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Code: 91002277 390012a8 96c04c2e d343fee8 (38f46908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	91002277 	add	x23, x19, #0x8
   4:	390012a8 	strb	w8, [x21, #4]
   8:	96c04c2e 	bl	0xfffffffffb0130c0
   c:	d343fee8 	lsr	x8, x23, #3
* 10:	38f46908 	ldrsb	w8, [x8, x20] <-- trapping instruction