Extracting prog: 50m43.897397919s
Minimizing prog: 3m35.274999068s
Simplifying prog options: 0s
Extracting C: 2m12.29315216s
Simplifying C: 29m13.547320009s


extracting reproducer from 24 programs
testing a last program of every proc
single: executing 4 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}}): socket$inet_smc-setsockopt$inet_tcp_int
detailed listing:
executing program 0:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program did not crash
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}}): socket$nl_netfilter-sendmsg$NFT_BATCH
detailed listing:
executing program 0:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)

program did not crash
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}}): openat$vga_arbiter-write$vga_arbiter
detailed listing:
executing program 0:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)

program did not crash
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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x2, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="31010000dccd5e08cb0603000000000023010902240001000064000904340102d469e70009058acf"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
single: failed to extract reproducer
bisect: bisecting 24 programs with base timeout 30s
testing program (duration=36s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, 0x0, 0x0)
executing program 2:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
getsockopt$CAN_RAW_FD_FRAMES(r0, 0x65, 0x8, &(0x7f0000004400), &(0x7f0000002140)=0x4)
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 0:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000900)=ANY=[@ANYBLOB="140000001000010000000000000000000a00000a20000000000a05000000000000000000070000000900010073797a300000000060000000090a0103fe00000000000008070000000800084000a105010900010073797a30000000001c0009801000028060b5e6940800014000000002080001405fffffff080005400000000408000a4000000000090002"], 0xa8}, 0x1, 0x0, 0x0, 0x20000080}, 0x0)
executing program 0:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBDIACR(r0, 0x80085610, &(0x7f0000004100)=""/42)
executing program 3:
r0 = socket$igmp6(0xa, 0x3, 0x2)
getsockopt$inet6_mtu(r0, 0x29, 0x17, 0x0, &(0x7f00000000c0))
executing program 0:
r0 = syz_open_dev$video4linux(&(0x7f0000000380), 0x0, 0x0)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000040)={0x8000000, 0x204, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000000)={0x8000000, 0x0, '\x00', @ptr}})
executing program 3:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_RES_QP_GET(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000140)={0x20, 0x140a, 0xd01, 0x70bd2b, 0x25dfdbfe, "", [@RDMA_NLDEV_ATTR_PORT_INDEX={0x8, 0x3, 0x1}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8}]}, 0x20}, 0x1, 0x0, 0x0, 0x9040}, 0xc010)
executing program 0:
socketpair$unix(0x1, 0x5, 0x0, &(0x7f00000000c0)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
ioctl$SIOCSIFHWADDR(r0, 0x8b04, 0x0)
executing program 3:
r0 = syz_open_dev$vim2m(&(0x7f00000003c0), 0x7, 0x2)
ioctl$vim2m_VIDIOC_S_FMT(r0, 0xc0d05605, &(0x7f0000000b40)={0x1, @pix_mp={0x0, 0x0, 0x33424752}})
executing program 0:
r0 = syz_open_dev$radio(&(0x7f0000000000), 0x3, 0x2)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000100)={0x0, 0x1, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000200)={0x9b090d, 0x0, '\x00', @value64}})
executing program 1:
r0 = openat$ptp0(0xffffffffffffff9c, &(0x7f0000000180), 0x8101, 0x0)
ioctl$PTP_ENABLE_PPS(r0, 0x40043d04, 0x0)
executing program 0:
r0 = syz_usb_connect(0x2, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="31010000dccd5e08cb0603000000000023010902240001000064000904340102d469e70009058acf"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
executing program 3:
r0 = openat$vicodec1(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
close(r0)
executing program 1:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000040)='/dev/comedi4\x00', 0x181001, 0x0)
ioctl$COMEDI_INSN(r0, 0x8028640c, &(0x7f0000000080)={0xc000003, 0x2d, 0x0, 0x1, 0x1})
executing program 1:
mknod(&(0x7f0000000040)='./file0\x00', 0x8001420, 0x0)
open$dir(&(0x7f0000000140)='./file0\x00', 0x22043, 0x1e2)
executing program 1:
r0 = socket(0xa, 0x2400000001, 0x0)
getsockopt$inet6_buf(r0, 0x29, 0x10000000000030, 0x0, &(0x7f0000e5f000)=0x90)
executing program 3:
r0 = socket$kcm(0x2d, 0x2, 0x0)
getsockopt$IP_VS_SO_GET_DESTS(r0, 0x11d, 0x484, 0x0, 0x0)
executing program 2:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBSENT(r0, 0x5602, 0x0)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: bisecting 24 programs
bisect: split chunks (needed=false): <24>
bisect: split chunk #0 of len 24 into 3 parts
bisect: testing without sub-chunk 1/3
testing program (duration=34s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 3:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_RES_QP_GET(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000140)={0x20, 0x140a, 0xd01, 0x70bd2b, 0x25dfdbfe, "", [@RDMA_NLDEV_ATTR_PORT_INDEX={0x8, 0x3, 0x1}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8}]}, 0x20}, 0x1, 0x0, 0x0, 0x9040}, 0xc010)
executing program 0:
socketpair$unix(0x1, 0x5, 0x0, &(0x7f00000000c0)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
ioctl$SIOCSIFHWADDR(r0, 0x8b04, 0x0)
executing program 3:
r0 = syz_open_dev$vim2m(&(0x7f00000003c0), 0x7, 0x2)
ioctl$vim2m_VIDIOC_S_FMT(r0, 0xc0d05605, &(0x7f0000000b40)={0x1, @pix_mp={0x0, 0x0, 0x33424752}})
executing program 0:
r0 = syz_open_dev$radio(&(0x7f0000000000), 0x3, 0x2)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000100)={0x0, 0x1, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000200)={0x9b090d, 0x0, '\x00', @value64}})
executing program 1:
r0 = openat$ptp0(0xffffffffffffff9c, &(0x7f0000000180), 0x8101, 0x0)
ioctl$PTP_ENABLE_PPS(r0, 0x40043d04, 0x0)
executing program 0:
r0 = syz_usb_connect(0x2, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="31010000dccd5e08cb0603000000000023010902240001000064000904340102d469e70009058acf"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
executing program 3:
r0 = openat$vicodec1(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
close(r0)
executing program 1:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000040)='/dev/comedi4\x00', 0x181001, 0x0)
ioctl$COMEDI_INSN(r0, 0x8028640c, &(0x7f0000000080)={0xc000003, 0x2d, 0x0, 0x1, 0x1})
executing program 1:
mknod(&(0x7f0000000040)='./file0\x00', 0x8001420, 0x0)
open$dir(&(0x7f0000000140)='./file0\x00', 0x22043, 0x1e2)
executing program 1:
r0 = socket(0xa, 0x2400000001, 0x0)
getsockopt$inet6_buf(r0, 0x29, 0x10000000000030, 0x0, &(0x7f0000e5f000)=0x90)
executing program 3:
r0 = socket$kcm(0x2d, 0x2, 0x0)
getsockopt$IP_VS_SO_GET_DESTS(r0, 0x11d, 0x484, 0x0, 0x0)
executing program 2:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBSENT(r0, 0x5602, 0x0)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program did not crash
bisect: testing without sub-chunk 2/3
testing program (duration=34s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, 0x0, 0x0)
executing program 2:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
getsockopt$CAN_RAW_FD_FRAMES(r0, 0x65, 0x8, &(0x7f0000004400), &(0x7f0000002140)=0x4)
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 0:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000900)=ANY=[@ANYBLOB="140000001000010000000000000000000a00000a20000000000a05000000000000000000070000000900010073797a300000000060000000090a0103fe00000000000008070000000800084000a105010900010073797a30000000001c0009801000028060b5e6940800014000000002080001405fffffff080005400000000408000a4000000000090002"], 0xa8}, 0x1, 0x0, 0x0, 0x20000080}, 0x0)
executing program 0:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBDIACR(r0, 0x80085610, &(0x7f0000004100)=""/42)
executing program 3:
r0 = socket$igmp6(0xa, 0x3, 0x2)
getsockopt$inet6_mtu(r0, 0x29, 0x17, 0x0, &(0x7f00000000c0))
executing program 0:
r0 = syz_open_dev$video4linux(&(0x7f0000000380), 0x0, 0x0)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000040)={0x8000000, 0x204, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000000)={0x8000000, 0x0, '\x00', @ptr}})
executing program 1:
mknod(&(0x7f0000000040)='./file0\x00', 0x8001420, 0x0)
open$dir(&(0x7f0000000140)='./file0\x00', 0x22043, 0x1e2)
executing program 1:
r0 = socket(0xa, 0x2400000001, 0x0)
getsockopt$inet6_buf(r0, 0x29, 0x10000000000030, 0x0, &(0x7f0000e5f000)=0x90)
executing program 3:
r0 = socket$kcm(0x2d, 0x2, 0x0)
getsockopt$IP_VS_SO_GET_DESTS(r0, 0x11d, 0x484, 0x0, 0x0)
executing program 2:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBSENT(r0, 0x5602, 0x0)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 3/3
testing program (duration=32s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, 0x0, 0x0)
executing program 2:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
getsockopt$CAN_RAW_FD_FRAMES(r0, 0x65, 0x8, &(0x7f0000004400), &(0x7f0000002140)=0x4)
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 0:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000900)=ANY=[@ANYBLOB="140000001000010000000000000000000a00000a20000000000a05000000000000000000070000000900010073797a300000000060000000090a0103fe00000000000008070000000800084000a105010900010073797a30000000001c0009801000028060b5e6940800014000000002080001405fffffff080005400000000408000a4000000000090002"], 0xa8}, 0x1, 0x0, 0x0, 0x20000080}, 0x0)
executing program 0:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBDIACR(r0, 0x80085610, &(0x7f0000004100)=""/42)
executing program 3:
r0 = socket$igmp6(0xa, 0x3, 0x2)
getsockopt$inet6_mtu(r0, 0x29, 0x17, 0x0, &(0x7f00000000c0))
executing program 0:
r0 = syz_open_dev$video4linux(&(0x7f0000000380), 0x0, 0x0)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000040)={0x8000000, 0x204, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000000)={0x8000000, 0x0, '\x00', @ptr}})

program did not crash
bisect: split chunks (needed=true): <8>, <8>
bisect: split chunk #0 of len 8 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=33s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 0:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000900)=ANY=[@ANYBLOB="140000001000010000000000000000000a00000a20000000000a05000000000000000000070000000900010073797a300000000060000000090a0103fe00000000000008070000000800084000a105010900010073797a30000000001c0009801000028060b5e6940800014000000002080001405fffffff080005400000000408000a4000000000090002"], 0xa8}, 0x1, 0x0, 0x0, 0x20000080}, 0x0)
executing program 0:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBDIACR(r0, 0x80085610, &(0x7f0000004100)=""/42)
executing program 3:
r0 = socket$igmp6(0xa, 0x3, 0x2)
getsockopt$inet6_mtu(r0, 0x29, 0x17, 0x0, &(0x7f00000000c0))
executing program 0:
r0 = syz_open_dev$video4linux(&(0x7f0000000380), 0x0, 0x0)
ioctl$VIDIOC_S_EXT_CTRLS(r0, 0xc0205648, &(0x7f0000000040)={0x8000000, 0x204, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000000000)={0x8000000, 0x0, '\x00', @ptr}})
executing program 1:
mknod(&(0x7f0000000040)='./file0\x00', 0x8001420, 0x0)
open$dir(&(0x7f0000000140)='./file0\x00', 0x22043, 0x1e2)
executing program 1:
r0 = socket(0xa, 0x2400000001, 0x0)
getsockopt$inet6_buf(r0, 0x29, 0x10000000000030, 0x0, &(0x7f0000e5f000)=0x90)
executing program 3:
r0 = socket$kcm(0x2d, 0x2, 0x0)
getsockopt$IP_VS_SO_GET_DESTS(r0, 0x11d, 0x484, 0x0, 0x0)
executing program 2:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBSENT(r0, 0x5602, 0x0)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program did not crash
bisect: testing without sub-chunk 2/2
testing program (duration=33s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, 0x0, 0x0)
executing program 2:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
getsockopt$CAN_RAW_FD_FRAMES(r0, 0x65, 0x8, &(0x7f0000004400), &(0x7f0000002140)=0x4)
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 1:
mknod(&(0x7f0000000040)='./file0\x00', 0x8001420, 0x0)
open$dir(&(0x7f0000000140)='./file0\x00', 0x22043, 0x1e2)
executing program 1:
r0 = socket(0xa, 0x2400000001, 0x0)
getsockopt$inet6_buf(r0, 0x29, 0x10000000000030, 0x0, &(0x7f0000e5f000)=0x90)
executing program 3:
r0 = socket$kcm(0x2d, 0x2, 0x0)
getsockopt$IP_VS_SO_GET_DESTS(r0, 0x11d, 0x484, 0x0, 0x0)
executing program 2:
r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$KDGKBSENT(r0, 0x5602, 0x0)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: split chunk #1 of len 8 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=32s, {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}}): [2, 2, 2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, 0x0, 0x0)
executing program 2:
r0 = socket$can_raw(0x1d, 0x3, 0x1)
getsockopt$CAN_RAW_FD_FRAMES(r0, 0x65, 0x8, &(0x7f0000004400), &(0x7f0000002140)=0x4)
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 2/2
bisect: no need to test this chunk, it's definitely needed
bisect: split chunks (needed=true): <4>, <4>
bisect: split chunk #0 of len 4 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=31s, {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}}): [2, 2, 2, 2, 2, 2]
detailed listing:
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 2/2
bisect: no need to test this chunk, it's definitely needed
bisect: split chunk #1 of len 4 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=31s, {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}}): [2, 2, 2, 2]
detailed listing:
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program did not crash
bisect: testing without sub-chunk 2/2
testing program (duration=31s, {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}}): [2, 2, 2, 2]
detailed listing:
executing program 2:
getgroups(0x3, &(0x7f00000018c0)=[0xee00, <r0=>0xee01, <r1=>0xffffffffffffffff])
setresgid(0x0, r1, r0)
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)

program did not crash
bisect: split chunks (needed=true): <2>, <2>, <2>
bisect: split chunk #0 of len 2 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=31s, {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}}): [2, 2, 2, 2, 2]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 1:
r0 = socket(0x10, 0x3, 0x0)
write(r0, &(0x7f0000000000)="240000001a005f0400f9f407000904018000000000000000000020000800020040000000", 0x24)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 2/2
bisect: no need to test this chunk, it's definitely needed
bisect: split chunk #1 of len 2 into 2 parts
bisect: testing without sub-chunk 1/2
testing program (duration=31s, {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}}): [2, 2, 2, 2]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 2:
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
sendmsg$NFT_BATCH(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)={{0xc8}, [@NFT_MSG_NEWTABLE={0x20, 0x0, 0xa, 0x301, 0x0, 0x0, {0x1, 0x0, 0xfffd}, [@NFTA_TABLE_NAME={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_NEWCHAIN={0x54, 0x3, 0xa, 0x201, 0x0, 0x0, {0x1}, [@NFTA_CHAIN_NAME={0x9, 0x3, 'syz2\x00'}, @NFTA_CHAIN_HOOK={0x28, 0x4, 0x0, 0x1, [@NFTA_HOOK_PRIORITY={0x8}, @NFTA_HOOK_HOOKNUM={0x8, 0x1, 0x1, 0x0, 0x5}, @NFTA_HOOK_DEV={0x14, 0x3, 'veth1_macvtap\x00'}]}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}, @NFT_MSG_DELCHAIN={0x2c, 0x5, 0xa, 0x201, 0x0, 0x0, {0x1, 0x0, 0x2000}, [@NFTA_CHAIN_HANDLE={0xc, 0x2, 0x1, 0x0, 0x1}, @NFTA_CHAIN_TABLE={0x9, 0x1, 'syz1\x00'}]}], {0x14}}, 0xc8}}, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 2/2
bisect: no need to test this chunk, it's definitely needed
bisect: split chunk #2 of len 2 into 2 parts
bisect: testing without sub-chunk 1/2
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}}): [2, 2, 2]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: the chunk can be dropped
bisect: testing without sub-chunk 2/2
bisect: no need to test this chunk, it's definitely needed
bisect: split chunks (needed=true): <1>, <1>, <1>
bisect: split chunk #0 of len 1 into 2 parts
bisect: no way to further split the chunk
bisect: split chunk #1 of len 1 into 2 parts
bisect: no way to further split the chunk
bisect: split chunk #2 of len 1 into 2 parts
bisect: no way to further split the chunk
bisect: 3 programs left: 

executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x4, 0x4)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)


bisect: trying to concatenate
bisect: concatenate 3 entries
minimizing program #0 before concatenation
testing program (duration=45s, {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}}): [1, 2, 2]
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing program (duration=45s, {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}}): [0, 2, 2]
detailed listing:
executing program 0:
executing program 3:
r0 = openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
write$vga_arbiter(r0, &(0x7f0000000040)=@other={'lock', ' ', 'mem'}, 0x7)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program did not crash
minimized 2 calls -> 1 calls
minimizing program #1 before concatenation
testing program (duration=45s, {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}}): [1, 1, 2]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
executing program 0:
openat$vga_arbiter(0xffffffffffffff9c, &(0x7f0000000000), 0x80082, 0x0)
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing program (duration=45s, {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}}): [1, 0, 2]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
executing program 0:
executing program 1:
r0 = socket$inet_smc(0x2b, 0x1, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x9, &(0x7f0000000040)=0x100000001, 0x4)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
minimized 2 calls -> 0 calls
minimizing program #2 before concatenation
testing program (duration=45s, {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}}): [1, 0, 1]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
executing program 3:
executing program 0:
socket$inet_smc(0x2b, 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing program (duration=45s, {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}}): [1, 0, 0]
detailed listing:
executing program 2:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)
executing program 3:
executing program 0:

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
minimized 2 calls -> 0 calls
testing program (duration=45s, {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
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
bisect: concatenation succeeded
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=45s, {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
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, 0x0, 0x0)

program did not crash
testing program (duration=45s, {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
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB], 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45s, {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
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
simplifying C reproducer
testing compiled C program (duration=45s, {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
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {Threaded:false Repeat:false 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
program did not crash
testing compiled C program (duration=45s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program did not crash
testing compiled C program (duration=45s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true 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_usb_connect
program did not crash
testing compiled C program (duration=45s, {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: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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:false 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
program did not crash
testing compiled C program (duration=45s, {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: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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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: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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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_usb_connect
program crashed: KFENCE: use-after-free read in media_devnode_unregister
a never seen crash title: KFENCE: use-after-free read in media_devnode_unregister, ignore
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing compiled C program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
testing program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
validation run: crashed=true
testing program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
validation run: crashed=true
testing program (duration=45s, {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:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="120100021982302013042360e5ec0102030109021b0001000060020904840001ee48b100090582"], 0x0)

program crashed: KASAN: slab-use-after-free Read in media_devnode_unregister
validation run: crashed=true
reproducing took 1h33m21.298054851s
repro crashed as (corrupted=false):
em28xx 1-1:0.132: Closing input extension
==================================================================
BUG: KASAN: slab-use-after-free in media_devnode_unregister+0xe2/0xf0 drivers/media/mc/mc-devnode.c:284
Read of size 4 at addr ffff88807f4874f0 by task kworker/1:1/43

CPU: 1 UID: 0 PID: 43 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 media_devnode_unregister+0xe2/0xf0 drivers/media/mc/mc-devnode.c:284
 media_device_unregister+0x37c/0x400 drivers/media/mc/mc-device.c:828
 em28xx_unregister_media_device drivers/media/usb/em28xx/em28xx-cards.c:3511 [inline]
 em28xx_release_resources+0xac/0x240 drivers/media/usb/em28xx/em28xx-cards.c:3532
 em28xx_usb_disconnect+0x19f/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4201
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x4d6/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x950 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1cf5/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 43:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5397
 kmalloc_noprof include/linux/slab.h:956 [inline]
 kzalloc_noprof include/linux/slab.h:1090 [inline]
 __media_device_register+0x58/0x280 drivers/media/mc/mc-device.c:720
 em28xx_usb_probe+0x1764/0x2a20 drivers/media/usb/em28xx/em28xx-cards.c:4153
 usb_probe_interface+0x665/0xc30 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694
 hub_port_connect drivers/usb/core/hub.c:5566 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 43:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
 kasan_save_free_info mm/kasan/kasan.h:406 [inline]
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2484 [inline]
 slab_free mm/slub.c:6121 [inline]
 kfree+0x199/0x6d0 mm/slub.c:6329
 media_devnode_release+0x61/0xa0 drivers/media/mc/mc-devnode.c:57
 device_release+0x9c/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x480 lib/kobject.c:737
 media_devnode_unregister+0x6d/0xf0 drivers/media/mc/mc-devnode.c:281
 media_device_unregister+0x37c/0x400 drivers/media/mc/mc-device.c:828
 em28xx_unregister_media_device drivers/media/usb/em28xx/em28xx-cards.c:3511 [inline]
 em28xx_release_resources+0xac/0x240 drivers/media/usb/em28xx/em28xx-cards.c:3532
 em28xx_usb_disconnect+0x19f/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4201
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x4d6/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x950 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1cf5/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88807f487000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1264 bytes inside of
 freed 2048-byte region [ffff88807f487000, ffff88807f487800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f480
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a842000 ffffea0001f04800 dead000000000002
raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a842000 ffffea0001f04800 dead000000000002
head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001fd2001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5884, tgid 5884 (syz-executor), ts 97002998287, free_ts 96959536657
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3863
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5153
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2996 [inline]
 allocate_slab+0x8a/0x330 mm/slub.c:3164
 new_slab mm/slub.c:3218 [inline]
 ___slab_alloc+0xbd1/0x13f0 mm/slub.c:4420
 __slab_alloc+0x55/0xa0 mm/slub.c:4511
 __slab_alloc_node mm/slub.c:4586 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 __do_kmalloc_node mm/slub.c:5365 [inline]
 __kmalloc_node_track_caller_noprof+0x5c7/0x800 mm/slub.c:5385
 kmemdup_noprof+0x2b/0x70 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:765 [inline]
 ip_vs_control_net_init_sysctl net/netfilter/ipvs/ip_vs_ctl.c:4283 [inline]
 ip_vs_control_net_init+0x816/0x1900 net/netfilter/ipvs/ip_vs_ctl.c:4462
 __ip_vs_init+0x2d2/0x460 net/netfilter/ipvs/ip_vs_core.c:2308
 ops_init+0x35c/0x5c0 net/core/net_namespace.c:136
 setup_net+0x10c/0x320 net/core/net_namespace.c:438
 copy_net_ns+0x31b/0x4d0 net/core/net_namespace.c:570
 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218
page last free pid 5884 tgid 5884 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2900
 discard_slab mm/slub.c:3262 [inline]
 __put_partials+0x146/0x170 mm/slub.c:3727
 put_cpu_partial+0x17c/0x250 mm/slub.c:3802
 __slab_free+0x2b9/0x390 mm/slub.c:5555
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4710 [inline]
 slab_alloc_node mm/slub.c:5008 [inline]
 kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5015
 getname_flags+0xb8/0x540 fs/namei.c:146
 user_path_at+0x24/0x60 fs/namei.c:3126
 do_mount fs/namespace.c:4122 [inline]
 __do_sys_mount fs/namespace.c:4324 [inline]
 __se_sys_mount+0x2d4/0x410 fs/namespace.c:4301
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88807f487380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807f487400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807f487480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88807f487500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807f487580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
em28xx 1-1:0.132: Closing input extension
==================================================================
BUG: KASAN: slab-use-after-free in media_devnode_unregister+0xe2/0xf0 drivers/media/mc/mc-devnode.c:284
Read of size 4 at addr ffff88807f4874f0 by task kworker/1:1/43

CPU: 1 UID: 0 PID: 43 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 media_devnode_unregister+0xe2/0xf0 drivers/media/mc/mc-devnode.c:284
 media_device_unregister+0x37c/0x400 drivers/media/mc/mc-device.c:828
 em28xx_unregister_media_device drivers/media/usb/em28xx/em28xx-cards.c:3511 [inline]
 em28xx_release_resources+0xac/0x240 drivers/media/usb/em28xx/em28xx-cards.c:3532
 em28xx_usb_disconnect+0x19f/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4201
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x4d6/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x950 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1cf5/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 43:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5397
 kmalloc_noprof include/linux/slab.h:956 [inline]
 kzalloc_noprof include/linux/slab.h:1090 [inline]
 __media_device_register+0x58/0x280 drivers/media/mc/mc-device.c:720
 em28xx_usb_probe+0x1764/0x2a20 drivers/media/usb/em28xx/em28xx-cards.c:4153
 usb_probe_interface+0x665/0xc30 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694
 hub_port_connect drivers/usb/core/hub.c:5566 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 43:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
 kasan_save_free_info mm/kasan/kasan.h:406 [inline]
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2484 [inline]
 slab_free mm/slub.c:6121 [inline]
 kfree+0x199/0x6d0 mm/slub.c:6329
 media_devnode_release+0x61/0xa0 drivers/media/mc/mc-devnode.c:57
 device_release+0x9c/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x480 lib/kobject.c:737
 media_devnode_unregister+0x6d/0xf0 drivers/media/mc/mc-devnode.c:281
 media_device_unregister+0x37c/0x400 drivers/media/mc/mc-device.c:828
 em28xx_unregister_media_device drivers/media/usb/em28xx/em28xx-cards.c:3511 [inline]
 em28xx_release_resources+0xac/0x240 drivers/media/usb/em28xx/em28xx-cards.c:3532
 em28xx_usb_disconnect+0x19f/0x2f0 drivers/media/usb/em28xx/em28xx-cards.c:4201
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x4d6/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x950 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1cf5/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88807f487000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1264 bytes inside of
 freed 2048-byte region [ffff88807f487000, ffff88807f487800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f480
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a842000 ffffea0001f04800 dead000000000002
raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a842000 ffffea0001f04800 dead000000000002
head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001fd2001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5884, tgid 5884 (syz-executor), ts 97002998287, free_ts 96959536657
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3863
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5153
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2996 [inline]
 allocate_slab+0x8a/0x330 mm/slub.c:3164
 new_slab mm/slub.c:3218 [inline]
 ___slab_alloc+0xbd1/0x13f0 mm/slub.c:4420
 __slab_alloc+0x55/0xa0 mm/slub.c:4511
 __slab_alloc_node mm/slub.c:4586 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 __do_kmalloc_node mm/slub.c:5365 [inline]
 __kmalloc_node_track_caller_noprof+0x5c7/0x800 mm/slub.c:5385
 kmemdup_noprof+0x2b/0x70 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:765 [inline]
 ip_vs_control_net_init_sysctl net/netfilter/ipvs/ip_vs_ctl.c:4283 [inline]
 ip_vs_control_net_init+0x816/0x1900 net/netfilter/ipvs/ip_vs_ctl.c:4462
 __ip_vs_init+0x2d2/0x460 net/netfilter/ipvs/ip_vs_core.c:2308
 ops_init+0x35c/0x5c0 net/core/net_namespace.c:136
 setup_net+0x10c/0x320 net/core/net_namespace.c:438
 copy_net_ns+0x31b/0x4d0 net/core/net_namespace.c:570
 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218
page last free pid 5884 tgid 5884 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2900
 discard_slab mm/slub.c:3262 [inline]
 __put_partials+0x146/0x170 mm/slub.c:3727
 put_cpu_partial+0x17c/0x250 mm/slub.c:3802
 __slab_free+0x2b9/0x390 mm/slub.c:5555
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4710 [inline]
 slab_alloc_node mm/slub.c:5008 [inline]
 kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5015
 getname_flags+0xb8/0x540 fs/namei.c:146
 user_path_at+0x24/0x60 fs/namei.c:3126
 do_mount fs/namespace.c:4122 [inline]
 __do_sys_mount fs/namespace.c:4324 [inline]
 __se_sys_mount+0x2d4/0x410 fs/namespace.c:4301
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88807f487380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807f487400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807f487480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88807f487500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807f487580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================