Extracting prog: 1m16.498521329s
Minimizing prog: 7m26.826394054s
Simplifying prog options: 0s
Extracting C: 23.294889102s
Simplifying C: 4m51.06010646s


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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program crashed: possible deadlock in digi_set_modem_signals
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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}}): mkdir-mount-openat
detailed listing:
executing program 0:
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, 0x0, 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', 0x0, 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program did not crash
testing program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, 0x0, 0xe002, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
simplifying C reproducer
testing compiled C program (duration=37.314431125s, {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_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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_usb_connect-mkdir-mount-openat
program did not crash
testing compiled C program (duration=37.314431125s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing compiled C program (duration=37.314431125s, {Threaded:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
program crashed: possible deadlock in digi_set_modem_signals
testing program (duration=37.314431125s, {Threaded:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program crashed: possible deadlock in digi_set_modem_signals
validation run: crashed=true
testing program (duration=37.314431125s, {Threaded:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program crashed: possible deadlock in digi_set_modem_signals
validation run: crashed=true
testing program (duration=37.314431125s, {Threaded:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-mkdir-mount-openat
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x5c, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040c505020000010102030109024a0001010080320904000008ff0000000705810200020007050102000200070582020002000705020200020007058302000200070503020002000705840200020007050402000200"], 0x0)
mkdir(&(0x7f0000000100)='mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='mnt\x00', &(0x7f0000000400)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000400)='mnt/ttyUSB0\x00', 0xe002, 0x0)

program crashed: possible deadlock in digi_set_modem_signals
validation run: crashed=true
reproducing took 16m22.113529384s
repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.17/5915 is trying to acquire lock:
ffff888032a61818 (&priv->dp_port_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
ffff888032a61818 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1c4/0x870 drivers/usb/serial/digi_acceleport.c:525

but task is already holding lock:
ffff888032a61018 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1b7/0x870 drivers/usb/serial/digi_acceleport.c:524

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&priv->dp_port_lock);
  lock(&priv->dp_port_lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by syz.0.17/5915:
 #0: ffff8880364b21b0 (&tty->legacy_mutex){+.+.}-{4:4}, at: tty_init_dev.part.0+0x39/0x470 drivers/tty/tty_io.c:1406
 #1: ffff888032a61018 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1b7/0x870 drivers/usb/serial/digi_acceleport.c:524

stack backtrace:
CPU: 1 UID: 0 PID: 5915 Comm: syz.0.17 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
 print_deadlock_bug.cold+0xbd/0xca kernel/locking/lockdep.c:3041
 check_deadlock kernel/locking/lockdep.c:3093 [inline]
 validate_chain kernel/locking/lockdep.c:3895 [inline]
 __lock_acquire+0x1256/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 spin_lock include/linux/spinlock.h:342 [inline]
 digi_set_modem_signals.constprop.0+0x1c4/0x870 drivers/usb/serial/digi_acceleport.c:525
 serial_port_dtr_rts+0x8a/0xb0 drivers/usb/serial/usb-serial.c:768
 tty_port_raise_dtr_rts drivers/tty/tty_port.c:456 [inline]
 tty_port_block_til_ready+0x5ae/0x910 drivers/tty/tty_port.c:540
 tty_port_open+0x19c/0x1f0 drivers/tty/tty_port.c:775
 tty_open+0x3dd/0xfa0 drivers/tty/tty_io.c:2137
 chrdev_open+0x234/0x6a0 fs/char_dev.c:411
 do_dentry_open+0x6ab/0x14d0 fs/open.c:947
 vfs_open+0x82/0x3f0 fs/open.c:1052
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2873/0x4280 fs/namei.c:4863
 do_file_open+0x20e/0x430 fs/namei.c:4892
 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c6d39e0d9
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:00007ffcf5f8a938 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9c6d625fa0 RCX: 00007f9c6d39e0d9
RDX: 000000000000e002 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f9c6d435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c6d625fac R14: 00007f9c6d625fa0 R15: 00007f9c6d625fa0
 </TASK>

final repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.17/5915 is trying to acquire lock:
ffff888032a61818 (&priv->dp_port_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
ffff888032a61818 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1c4/0x870 drivers/usb/serial/digi_acceleport.c:525

but task is already holding lock:
ffff888032a61018 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1b7/0x870 drivers/usb/serial/digi_acceleport.c:524

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&priv->dp_port_lock);
  lock(&priv->dp_port_lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by syz.0.17/5915:
 #0: ffff8880364b21b0 (&tty->legacy_mutex){+.+.}-{4:4}, at: tty_init_dev.part.0+0x39/0x470 drivers/tty/tty_io.c:1406
 #1: ffff888032a61018 (&priv->dp_port_lock){....}-{3:3}, at: digi_set_modem_signals.constprop.0+0x1b7/0x870 drivers/usb/serial/digi_acceleport.c:524

stack backtrace:
CPU: 1 UID: 0 PID: 5915 Comm: syz.0.17 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
 print_deadlock_bug.cold+0xbd/0xca kernel/locking/lockdep.c:3041
 check_deadlock kernel/locking/lockdep.c:3093 [inline]
 validate_chain kernel/locking/lockdep.c:3895 [inline]
 __lock_acquire+0x1256/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 spin_lock include/linux/spinlock.h:342 [inline]
 digi_set_modem_signals.constprop.0+0x1c4/0x870 drivers/usb/serial/digi_acceleport.c:525
 serial_port_dtr_rts+0x8a/0xb0 drivers/usb/serial/usb-serial.c:768
 tty_port_raise_dtr_rts drivers/tty/tty_port.c:456 [inline]
 tty_port_block_til_ready+0x5ae/0x910 drivers/tty/tty_port.c:540
 tty_port_open+0x19c/0x1f0 drivers/tty/tty_port.c:775
 tty_open+0x3dd/0xfa0 drivers/tty/tty_io.c:2137
 chrdev_open+0x234/0x6a0 fs/char_dev.c:411
 do_dentry_open+0x6ab/0x14d0 fs/open.c:947
 vfs_open+0x82/0x3f0 fs/open.c:1052
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2873/0x4280 fs/namei.c:4863
 do_file_open+0x20e/0x430 fs/namei.c:4892
 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c6d39e0d9
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:00007ffcf5f8a938 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9c6d625fa0 RCX: 00007f9c6d39e0d9
RDX: 000000000000e002 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f9c6d435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c6d625fac R14: 00007f9c6d625fa0 R15: 00007f9c6d625fa0
 </TASK>