Extracting prog: 3m54.132597209s
Minimizing prog: 1h42m0.87061122s
Simplifying prog options: 0s
Extracting C: 2m20.199302751s
Simplifying C: 46m40.633722962s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false 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$bt_hci-bind$bt_hci-write-read-syz_emit_vhci-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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(&(0x7f0000000500)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_ext_features={{0x23, 0xd}, {0x0, 0xc9, 0x1, 0x1}}}, 0x10)
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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-read-syz_emit_vhci-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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(&(0x7f0000000500)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_ext_features={{0x23, 0xd}, {0x0, 0xc9, 0x1, 0x1}}}, 0x10)
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 12 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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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(&(0x7f0000000500)=@HCI_EVENT_PKT={0x4, @hci_ev_remote_ext_features={{0x23, 0xd}, {0x0, 0xc9, 0x1, 0x1}}}, 0x10)

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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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
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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$bt_hci-write-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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
write(r1, &(0x7f0000000700)="330000000800aaaaaaaaaa100000", 0xe)
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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-bind$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$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000600)={0x1f, 0x0, 0x3}, 0x6)
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
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$bt_l2cap-bind$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
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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-listen-syz_init_net_socket$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: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}}): 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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$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: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$bt_l2cap-bind$bt_l2cap-listen-syz_init_net_socket$bt_hci-read-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci-syz_emit_vhci
program crashed: KASAN: null-ptr-deref Read in l2cap_chan_hold_unless_zero
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_init_net_socket$bt_l2cap-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 2h43m4.142727277s
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+0x80/0x290 net/bluetooth/l2cap_core.c:511
Read of size 4 at addr 0000000000000008 by task syz.0.158/6397

CPU: 2 UID: 0 PID: 6397 Comm: syz.0.158 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:186 [inline]
 kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
 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+0x80/0x290 net/bluetooth/l2cap_core.c:511
 l2cap_sock_cleanup_listen+0x8a/0x4d0 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x69/0x280 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xb3/0x260 net/socket.c:710
 sock_close+0x1c/0x30 net/socket.c:1501
 __fput+0x3ff/0xb50 fs/file_table.c:512
 task_work_run+0x150/0x240 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+0x1d8/0x6f0 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]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3758d9de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff659f88f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f3759027da0 RCX: 00007f3758d9de99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f3759027da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f3759027cb0 R11: 0000000000000246 R12: 0000000000046482
R13: 00007f375902609c R14: 00000000000461ac R15: 00007f3759026090
 </TASK>
==================================================================

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+0x80/0x290 net/bluetooth/l2cap_core.c:511
Read of size 4 at addr 0000000000000008 by task syz.0.158/6397

CPU: 2 UID: 0 PID: 6397 Comm: syz.0.158 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:186 [inline]
 kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
 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+0x80/0x290 net/bluetooth/l2cap_core.c:511
 l2cap_sock_cleanup_listen+0x8a/0x4d0 net/bluetooth/l2cap_sock.c:1535
 l2cap_sock_release+0x69/0x280 net/bluetooth/l2cap_sock.c:1480
 __sock_release+0xb3/0x260 net/socket.c:710
 sock_close+0x1c/0x30 net/socket.c:1501
 __fput+0x3ff/0xb50 fs/file_table.c:512
 task_work_run+0x150/0x240 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+0x1d8/0x6f0 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]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3758d9de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff659f88f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f3759027da0 RCX: 00007f3758d9de99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f3759027da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f3759027cb0 R11: 0000000000000246 R12: 0000000000046482
R13: 00007f375902609c R14: 00000000000461ac R15: 00007f3759026090
 </TASK>
==================================================================