Extracting prog: 1m46.318075557s
Minimizing prog: 5m56.231558687s
Simplifying prog options: 2m4.196677398s
Extracting C: 1m1.411843908s
Simplifying C: 0s


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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program crashed: WARNING in hci_conn_timeout
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=53.191144448s, {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_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(0x0, 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(0x0, 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB], 0xe)

program did not crash
extracting C reproducer
testing compiled C program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
program crashed: kernel panic: kernel: panic_on_warn set ...
a never seen crash title: kernel panic: kernel: panic_on_warn set ..., ignore
simplifying guilty program options
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
testing program (duration=53.191144448s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program did not crash
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program crashed: WARNING in hci_conn_timeout
validation run: crashed=true
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program crashed: WARNING in hci_conn_timeout
validation run: crashed=true
testing program (duration=53.191144448s, {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_emit_vhci-syz_emit_vhci
detailed listing:
executing program 0:
syz_emit_vhci(&(0x7f0000000540)=ANY=[@ANYBLOB="043e1f0a"], 0x22)
syz_emit_vhci(&(0x7f0000000300)=ANY=[@ANYBLOB="040b"], 0xe)

program crashed: WARNING in hci_conn_timeout
validation run: crashed=true
reproducing took 12m23.14138221s
repro crashed as (corrupted=false):
kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:649 at hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:649, CPU#0: kworker/u34:5/6055
Modules linked in:
CPU: 0 UID: 0 PID: 6055 Comm: kworker/u34:5 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
Workqueue: hci0 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:649
Code: 44 0f b6 2d b3 28 79 07 31 ff 41 83 e5 40 44 89 ee e8 6a c5 43 f7 45 84 ed 0f 84 02 ff ff ff e9 cd 26 aa f6 e8 47 cb 43 f7 90 <0f> 0b 90 e8 3e cb 43 f7 48 8d bb ed f5 ff ff 48 b8 00 00 00 00 00
RSP: 0000:ffffc900039e7bf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802a3a0a50 RCX: 0000000000000000
RDX: ffff888029f14b00 RSI: ffffffff8ac7e8c9 RDI: ffff888029f14b00
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 000000000000762b R12: ffff88802a3a0000
R13: ffff888029f14fc4 R14: 0000000000000000 R15: ffff888053eb4c00
FS:  0000000000000000(0000) GS:ffff88809574a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7238e50 CR3: 0000000054e7d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

final repro crashed as (corrupted=false):
kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:649 at hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:649, CPU#0: kworker/u34:5/6055
Modules linked in:
CPU: 0 UID: 0 PID: 6055 Comm: kworker/u34:5 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
Workqueue: hci0 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:649
Code: 44 0f b6 2d b3 28 79 07 31 ff 41 83 e5 40 44 89 ee e8 6a c5 43 f7 45 84 ed 0f 84 02 ff ff ff e9 cd 26 aa f6 e8 47 cb 43 f7 90 <0f> 0b 90 e8 3e cb 43 f7 48 8d bb ed f5 ff ff 48 b8 00 00 00 00 00
RSP: 0000:ffffc900039e7bf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802a3a0a50 RCX: 0000000000000000
RDX: ffff888029f14b00 RSI: ffffffff8ac7e8c9 RDI: ffff888029f14b00
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 000000000000762b R12: ffff88802a3a0000
R13: ffff888029f14fc4 R14: 0000000000000000 R15: ffff888053eb4c00
FS:  0000000000000000(0000) GS:ffff88809574a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7238e50 CR3: 0000000054e7d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>