Extracting prog: 17m25.853793352s
Minimizing prog: 26m11.480675374s
Simplifying prog options: 13m17.091228642s
Extracting C: 5m13.856417384s
Simplifying C: 0s


extracting reproducer from 72 programs
testing a last program of every proc
single: executing 22 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): unlink$auto-mmap$auto-socket-getsockopt$auto-close_range$auto-close_range$auto-openat$auto_snd_rawmidi_f_ops_rawmidi-openat$auto_evdev_fops_evdev-openat$auto_evdev_fops_evdev-openat$auto_kvm_chardev_ops_kvm_main-socket$nl_generic-close_range$auto-close_range$auto-openat$auto_kvm_chardev_ops_kvm_main-ioctl$auto_KVM_CREATE_VM-ioctl$auto-ioctl$auto-ioctl$auto_KVM_GET_MSRS-unshare$auto-openat$auto_kmsg_fops_printk-lseek$auto-unshare$auto-openat$auto_snd_ctl_f_ops_control-openat$auto_snd_ctl_f_ops_control-unshare$auto-unshare$auto-mmap$auto-mmap$auto-openat$auto_tty_fops_tty_io-openat$auto_console_fops_tty_io-openat$auto_console_fops_tty_io-socket-mmap$auto-semctl$auto_SEM_INFO-socket$nl_generic-socket$nl_generic-fcntl$auto-openat$auto_kernfs_file_fops_kernfs_internal-mmap$auto-mmap$auto
detailed listing:
executing program 0:
unlink$auto(&(0x7f0000000000)='.\x00')
mmap$auto(0x0, 0x2, 0x3, 0xeb1, 0xfffffffffffffffa, 0x800000008000)
socket(0xa, 0x1, 0x84)
getsockopt$auto(0xffffffffffffffff, 0x1, 0x53, 0x0, 0x0)
close_range$auto(0x2, 0x8, 0x0) (async)
close_range$auto(0x2, 0x8, 0x0)
openat$auto_snd_rawmidi_f_ops_rawmidi(0xffffffffffffff9c, &(0x7f0000000000)='/dev/admmidi2\x00', 0x1, 0x0)
openat$auto_evdev_fops_evdev(0xffffffffffffff9c, &(0x7f0000000100)='/dev/input/event1\x00', 0x34d802, 0x0) (async)
openat$auto_evdev_fops_evdev(0xffffffffffffff9c, &(0x7f0000000100)='/dev/input/event1\x00', 0x34d802, 0x0)
r0 = openat$auto_kvm_chardev_ops_kvm_main(0xffffffffffffff9c, &(0x7f0000000180), 0x109802, 0x0)
r1 = socket$nl_generic(0x10, 0x3, 0x10)
close_range$auto(0x2, 0x8, 0x0) (async)
close_range$auto(0x2, 0x8, 0x0)
r2 = openat$auto_kvm_chardev_ops_kvm_main(0xffffffffffffff9c, &(0x7f0000000140), 0x30400, 0x0)
ioctl$auto_KVM_CREATE_VM(r2, 0xae01, 0x0)
ioctl$auto(0x3, 0xae41, r1) (async)
ioctl$auto(0x3, 0xae41, r1)
ioctl$auto_KVM_GET_MSRS(r0, 0x4008ae89, &(0x7f0000000040)={0x5, 0x0, [{0x40000071, 0x7, 0x1000}]})
unshare$auto(0x40000080)
r3 = openat$auto_kmsg_fops_printk(0xffffffffffffff9c, &(0x7f0000000100), 0x20a00, 0x0)
lseek$auto(r3, 0x0, 0x2)
unshare$auto(0x40000080)
openat$auto_snd_ctl_f_ops_control(0xffffffffffffff9c, &(0x7f0000000000)='/dev/snd/controlC2\x00', 0x0, 0x0) (async)
openat$auto_snd_ctl_f_ops_control(0xffffffffffffff9c, &(0x7f0000000000)='/dev/snd/controlC2\x00', 0x0, 0x0)
unshare$auto(0x40000080) (async)
unshare$auto(0x40000080)
mmap$auto(0x8000000, 0x40009, 0xdf, 0x9b72, 0x7, 0x28000) (async)
mmap$auto(0x8000000, 0x40009, 0xdf, 0x9b72, 0x7, 0x28000)
openat$auto_tty_fops_tty_io(0xffffffffffffff9c, &(0x7f0000000400)='/dev/ptye9\x00', 0x101e81, 0x0)
openat$auto_console_fops_tty_io(0xffffffffffffff9c, &(0x7f0000000800)='/dev/tty0\x00', 0x102, 0x0) (async)
openat$auto_console_fops_tty_io(0xffffffffffffff9c, &(0x7f0000000800)='/dev/tty0\x00', 0x102, 0x0)
socket(0x11, 0x5, 0x100)
mmap$auto(0x0, 0x200004, 0x4000000000e3, 0x44eb2, 0xffffffffffffffff, 0x300000000000)
semctl$auto_SEM_INFO(0x0, 0x4, 0x13, 0x1)
socket$nl_generic(0x10, 0x3, 0x10) (async)
r4 = socket$nl_generic(0x10, 0x3, 0x10)
fcntl$auto(r4, 0xa, 0x1)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f00000000c0)='/sys/devices/virtual/bdi/1:5/min_bytes\x00', 0x88282, 0x0)
mmap$auto(0x0, 0x20009, 0xe3, 0x100000eb1, 0x40000000000a1, 0x8000) (async)
mmap$auto(0x0, 0x20009, 0xe3, 0x100000eb1, 0x40000000000a1, 0x8000)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_genetlink_get_family_id$auto_ethtool-mmap$auto-socket-bind$auto-sendmmsg$auto-mmap$auto-ioctl$auto-mmap$auto-syslog$auto-syz_clone3-syz_open_procfs$namespace-getdents$auto-getdents$auto-msync$auto-openat$auto_kvm_chardev_ops_kvm_main-close_range$auto-ioctl$auto_KVM_CREATE_VM-fallocate$auto-mmap$auto-connect$auto
detailed listing:
executing program 0:
syz_genetlink_get_family_id$auto_ethtool(&(0x7f0000000200), 0xffffffffffffffff)
mmap$auto(0x0, 0x4020009, 0xdf, 0xeb1, 0x401, 0x8000)
r0 = socket(0x2, 0x1, 0x0)
bind$auto(0x3, &(0x7f0000000040)=@in={0x2, 0x3, @remote}, 0x6a)
sendmmsg$auto(r0, &(0x7f0000000140)={{&(0x7f0000000040), 0x12, 0x0, 0x9, 0x0, 0x1f, 0xb}, 0x800009}, 0x5, 0x20000000)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
ioctl$auto(0x3, 0x541b, 0x38)
mmap$auto(0x0, 0x400009, 0xdf, 0x9b72, 0x8000000000000003, 0x8000)
syslog$auto(0x3, 0x0, 0x5)
r1 = syz_clone3(&(0x7f0000000340)={0x100400, 0x0, 0x0, &(0x7f0000000100), {0x11}, &(0x7f0000000180)=""/2, 0x2, &(0x7f0000000240)=""/161, &(0x7f0000000300)=[0xffffffffffffffff, 0xffffffffffffffff, 0x0], 0x3}, 0x58)
r2 = syz_open_procfs$namespace(r1, &(0x7f0000000080)='ns/pid_for_children\x00')
getdents$auto(r2, 0x0, 0x18)
getdents$auto(r2, 0x0, 0xa2b0)
msync$auto(0x0, 0x2000000005, 0x6)
r3 = openat$auto_kvm_chardev_ops_kvm_main(0xffffffffffffff9c, &(0x7f0000000000), 0x18b040, 0x0)
close_range$auto(0x2, r3, 0x0)
ioctl$auto_KVM_CREATE_VM(r3, 0xc040aed5, 0x0)
fallocate$auto(r3, 0x1ff, 0x5, 0x6e9)
mmap$auto(0x0, 0x20009, 0xdf, 0xeb1, 0x401, 0x8000)
connect$auto(0x3, 0x0, 0x54)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-openat$auto_fops_u32_-read$auto_fops_u32_-syz_genetlink_get_family_id$auto_ovs_datapath-sendmsg$auto_OVS_DP_CMD_NEW
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r1, 0x0, 0x0)
r2 = syz_genetlink_get_family_id$auto_ovs_datapath(&(0x7f0000000040), 0xffffffffffffffff)
sendmsg$auto_OVS_DP_CMD_NEW(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000000)={0x14, r2, 0x1, 0x2070bd26, 0x25dfdbf8}, 0x14}, 0x1, 0x0, 0x0, 0x801}, 0x81)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-openat$auto_fops_u32_-read$auto_fops_u32_-syz_genetlink_get_family_id$auto_ovs_datapath
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)
syz_genetlink_get_family_id$auto_ovs_datapath(&(0x7f0000000040), 0xffffffffffffffff)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-openat$auto_fops_u32_
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-read$auto_fops_u32_
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
read$auto_fops_u32_(0xffffffffffffffff, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, 0x0, 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {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}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_fops_u32_-read$auto_fops_u32_
detailed listing:
executing program 0:
r0 = openat$auto_fops_u32_(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/netdevsim/netdevsim0/ports/1/ethtool/ring/rx_max_pending\x00', 0x400, 0x0)
read$auto_fops_u32_(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in debugfs_u32_get
validation run: crashed=true
reproducing took 1h26m46.483684852s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in debugfs_u32_get+0x65/0x80 fs/debugfs/file.c:657
Read of size 4 at addr ffff88807c8e5b00 by task syz.2.10230/16881

CPU: 0 UID: 0 PID: 16881 Comm: syz.2.10230 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1d0 mm/kasan/report.c:595
 debugfs_u32_get+0x65/0x80 fs/debugfs/file.c:657
 simple_attr_read+0x16b/0x350 fs/libfs.c:1368
 debugfs_attr_read+0x74/0xb0 fs/debugfs/file.c:523
 vfs_read+0x1e4/0xb30 fs/read_write.c:572
 ksys_read+0x12a/0x250 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7fd79ce59
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:00007ffe85aad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fa7fda15fa0 RCX: 00007fa7fd79ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa7fd832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7fda15fac R14: 00007fa7fda15fa0 R15: 00007fa7fda15fa0
 </TASK>

Allocated by task 14078:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5296 [inline]
 __kvmalloc_node_noprof+0x360/0xa00 mm/slub.c:6833
 alloc_netdev_mqs+0xd7/0x1560 net/core/dev.c:12029
 nsim_create+0x94/0x1420 drivers/net/netdevsim/netdev.c:1133
 __nsim_dev_port_add+0x3ba/0x8f0 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1570 [inline]
 nsim_drv_probe+0xeb7/0x14b0 drivers/net/netdevsim/dev.c:1731
 call_driver_probe drivers/base/dd.c:631 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:709
 __driver_probe_device+0x22e/0x480 drivers/base/dd.c:871
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:901
 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:1029
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1101
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x64/0x160 drivers/base/bus.c:613
 device_add+0x1210/0x1950 drivers/base/core.c:3706
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:471 [inline]
 new_device_store+0x40b/0x700 drivers/net/netdevsim/bus.c:191
 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1070 fs/read_write.c:688
 ksys_write+0x12a/0x250 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 13:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kfree+0x223/0x6c0 mm/slub.c:6566
 device_release+0xd2/0x270 drivers/base/core.c:2566
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3814
 free_netdev+0x5ef/0x8c0 net/core/dev.c:12223
 __nsim_dev_port_del+0x194/0x2b0 drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x10a/0x4a0 drivers/net/netdevsim/dev.c:1785
 nsim_dev_reload_down+0x66/0xd0 drivers/net/netdevsim/dev.c:1038
 devlink_reload+0x1ae/0x7a0 net/devlink/dev.c:462
 devlink_pernet_pre_exit+0x247/0x370 net/devlink/core.c:560
 ops_pre_exit_list net/core/net_namespace.c:161 [inline]
 ops_undo_list+0x187/0xab0 net/core/net_namespace.c:234
 cleanup_net+0x499/0x920 net/core/net_namespace.c:702
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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 ffff88807c8e4000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 6912 bytes inside of
 freed 8192-byte region [ffff88807c8e4000, ffff88807c8e6000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c8e0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88807c8e2011
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88813fe47640 dead000000000100 dead000000000122
raw: 0000000000000000 0000400000020002 00000000f5000000 ffff88807c8e2011
head: 00fff00000000040 ffff88813fe47640 dead000000000100 dead000000000122
head: 0000000000000000 0000400000020002 00000000f5000000 ffff88807c8e2011
head: 00fff00000000003 fffffffffffffe01 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5738, tgid 5738 (syz-executor), ts 350789534111, free_ts 350786879056
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x11a6/0x3410 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x27c/0x2bc0 mm/page_alloc.c:5221
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab mm/slub.c:3467 [inline]
 new_slab+0xa6/0x6c0 mm/slub.c:3525
 refill_objects+0x277/0x420 mm/slub.c:7272
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x375/0x650 mm/slub.c:4652
 alloc_from_pcs mm/slub.c:4750 [inline]
 slab_alloc_node mm/slub.c:4884 [inline]
 __do_kmalloc_node mm/slub.c:5295 [inline]
 __kvmalloc_node_noprof+0x7da/0xa00 mm/slub.c:6833
 alloc_netdev_mqs+0xd7/0x1560 net/core/dev.c:12029
 rtnl_create_link+0xc13/0xf80 net/core/rtnetlink.c:3672
 rtnl_newlink_create net/core/rtnetlink.c:3854 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3995 [inline]
 rtnl_newlink+0x13bd/0x2380 net/core/rtnetlink.c:4110
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6997
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2555
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 __sys_sendto+0x468/0x4b0 net/socket.c:2266
 __do_sys_sendto net/socket.c:2273 [inline]
 __se_sys_sendto net/socket.c:2269 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2269
page last free pid 5762 tgid 5762 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0x794/0x10a0 mm/page_alloc.c:2938
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4570 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 __kmalloc_cache_noprof+0x243/0x6f0 mm/slub.c:5415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270
 __netdev_tracker_alloc include/linux/netdevice.h:4471 [inline]
 netdev_hold include/linux/netdevice.h:4500 [inline]
 netdev_hold include/linux/netdevice.h:4495 [inline]
 netdev_queue_add_kobject net/core/net-sysfs.c:1979 [inline]
 netdev_queue_update_kobjects+0x2db/0x6f0 net/core/net-sysfs.c:2041
 register_queue_kobjects net/core/net-sysfs.c:2104 [inline]
 netdev_register_kobject+0x2b3/0x3d0 net/core/net-sysfs.c:2347
 register_netdevice+0x151c/0x24b0 net/core/dev.c:11423
 __ip_tunnel_create+0x52b/0x670 net/ipv4/ip_tunnel.c:268
 ip_tunnel_init_net+0x230/0x780 net/ipv4/ip_tunnel.c:1147
 ops_init+0x1e2/0x5f0 net/core/net_namespace.c:137
 setup_net+0x118/0x3a0 net/core/net_namespace.c:446
 copy_net_ns+0x46f/0x7c0 net/core/net_namespace.c:579
 create_new_namespaces+0x3ea/0xac0 kernel/nsproxy.c:132
 unshare_nsproxy_namespaces+0xf2/0x220 kernel/nsproxy.c:234

Memory state around the buggy address:
 ffff88807c8e5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c8e5a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807c8e5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88807c8e5b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c8e5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in debugfs_u32_get+0x65/0x80 fs/debugfs/file.c:657
Read of size 4 at addr ffff88807c8e5b00 by task syz.2.10230/16881

CPU: 0 UID: 0 PID: 16881 Comm: syz.2.10230 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1d0 mm/kasan/report.c:595
 debugfs_u32_get+0x65/0x80 fs/debugfs/file.c:657
 simple_attr_read+0x16b/0x350 fs/libfs.c:1368
 debugfs_attr_read+0x74/0xb0 fs/debugfs/file.c:523
 vfs_read+0x1e4/0xb30 fs/read_write.c:572
 ksys_read+0x12a/0x250 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7fd79ce59
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:00007ffe85aad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fa7fda15fa0 RCX: 00007fa7fd79ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa7fd832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7fda15fac R14: 00007fa7fda15fa0 R15: 00007fa7fda15fa0
 </TASK>

Allocated by task 14078:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5296 [inline]
 __kvmalloc_node_noprof+0x360/0xa00 mm/slub.c:6833
 alloc_netdev_mqs+0xd7/0x1560 net/core/dev.c:12029
 nsim_create+0x94/0x1420 drivers/net/netdevsim/netdev.c:1133
 __nsim_dev_port_add+0x3ba/0x8f0 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1570 [inline]
 nsim_drv_probe+0xeb7/0x14b0 drivers/net/netdevsim/dev.c:1731
 call_driver_probe drivers/base/dd.c:631 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:709
 __driver_probe_device+0x22e/0x480 drivers/base/dd.c:871
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:901
 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:1029
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1101
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x64/0x160 drivers/base/bus.c:613
 device_add+0x1210/0x1950 drivers/base/core.c:3706
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:471 [inline]
 new_device_store+0x40b/0x700 drivers/net/netdevsim/bus.c:191
 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1070 fs/read_write.c:688
 ksys_write+0x12a/0x250 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 13:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kfree+0x223/0x6c0 mm/slub.c:6566
 device_release+0xd2/0x270 drivers/base/core.c:2566
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3814
 free_netdev+0x5ef/0x8c0 net/core/dev.c:12223
 __nsim_dev_port_del+0x194/0x2b0 drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x10a/0x4a0 drivers/net/netdevsim/dev.c:1785
 nsim_dev_reload_down+0x66/0xd0 drivers/net/netdevsim/dev.c:1038
 devlink_reload+0x1ae/0x7a0 net/devlink/dev.c:462
 devlink_pernet_pre_exit+0x247/0x370 net/devlink/core.c:560
 ops_pre_exit_list net/core/net_namespace.c:161 [inline]
 ops_undo_list+0x187/0xab0 net/core/net_namespace.c:234
 cleanup_net+0x499/0x920 net/core/net_namespace.c:702
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 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 ffff88807c8e4000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 6912 bytes inside of
 freed 8192-byte region [ffff88807c8e4000, ffff88807c8e6000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c8e0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88807c8e2011
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88813fe47640 dead000000000100 dead000000000122
raw: 0000000000000000 0000400000020002 00000000f5000000 ffff88807c8e2011
head: 00fff00000000040 ffff88813fe47640 dead000000000100 dead000000000122
head: 0000000000000000 0000400000020002 00000000f5000000 ffff88807c8e2011
head: 00fff00000000003 fffffffffffffe01 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5738, tgid 5738 (syz-executor), ts 350789534111, free_ts 350786879056
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x11a6/0x3410 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x27c/0x2bc0 mm/page_alloc.c:5221
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab mm/slub.c:3467 [inline]
 new_slab+0xa6/0x6c0 mm/slub.c:3525
 refill_objects+0x277/0x420 mm/slub.c:7272
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x375/0x650 mm/slub.c:4652
 alloc_from_pcs mm/slub.c:4750 [inline]
 slab_alloc_node mm/slub.c:4884 [inline]
 __do_kmalloc_node mm/slub.c:5295 [inline]
 __kvmalloc_node_noprof+0x7da/0xa00 mm/slub.c:6833
 alloc_netdev_mqs+0xd7/0x1560 net/core/dev.c:12029
 rtnl_create_link+0xc13/0xf80 net/core/rtnetlink.c:3672
 rtnl_newlink_create net/core/rtnetlink.c:3854 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3995 [inline]
 rtnl_newlink+0x13bd/0x2380 net/core/rtnetlink.c:4110
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6997
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2555
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 __sys_sendto+0x468/0x4b0 net/socket.c:2266
 __do_sys_sendto net/socket.c:2273 [inline]
 __se_sys_sendto net/socket.c:2269 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2269
page last free pid 5762 tgid 5762 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0x794/0x10a0 mm/page_alloc.c:2938
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4570 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 __kmalloc_cache_noprof+0x243/0x6f0 mm/slub.c:5415
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ref_tracker_alloc+0x190/0x590 lib/ref_tracker.c:270
 __netdev_tracker_alloc include/linux/netdevice.h:4471 [inline]
 netdev_hold include/linux/netdevice.h:4500 [inline]
 netdev_hold include/linux/netdevice.h:4495 [inline]
 netdev_queue_add_kobject net/core/net-sysfs.c:1979 [inline]
 netdev_queue_update_kobjects+0x2db/0x6f0 net/core/net-sysfs.c:2041
 register_queue_kobjects net/core/net-sysfs.c:2104 [inline]
 netdev_register_kobject+0x2b3/0x3d0 net/core/net-sysfs.c:2347
 register_netdevice+0x151c/0x24b0 net/core/dev.c:11423
 __ip_tunnel_create+0x52b/0x670 net/ipv4/ip_tunnel.c:268
 ip_tunnel_init_net+0x230/0x780 net/ipv4/ip_tunnel.c:1147
 ops_init+0x1e2/0x5f0 net/core/net_namespace.c:137
 setup_net+0x118/0x3a0 net/core/net_namespace.c:446
 copy_net_ns+0x46f/0x7c0 net/core/net_namespace.c:579
 create_new_namespaces+0x3ea/0xac0 kernel/nsproxy.c:132
 unshare_nsproxy_namespaces+0xf2/0x220 kernel/nsproxy.c:234

Memory state around the buggy address:
 ffff88807c8e5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c8e5a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807c8e5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88807c8e5b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c8e5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================