Extracting prog: 1m52.651414894s
Minimizing prog: 21m35.15372002s
Simplifying prog options: 0s
Extracting C: 46.068489763s
Simplifying C: 4m10.048341788s


extracting reproducer from 74 programs
testing a last program of every proc
single: executing 24 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat$selinux_status-mmap$IORING_OFF_SQ_RING-mlockall
detailed listing:
executing program 0:
r0 = openat$selinux_status(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
mmap$IORING_OFF_SQ_RING(0x0, 0x73, 0x1, 0x17052, r0, 0x0) (async)
mlockall(0x1)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap-ioctl$TUNGETVNETLE-bpf$OBJ_GET_PROG-bpf$PROG_BIND_MAP-ioctl$UFFDIO_API-mount$9p_fd
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
r4 = userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r5 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r5)
r6 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r7=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r8=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r6}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r7}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r8}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r9 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r9, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r5, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r5, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)
ioctl$TUNGETVNETLE(r0, 0x800454dd, &(0x7f0000000040))
r10 = bpf$OBJ_GET_PROG(0x7, &(0x7f0000000100)=@generic={&(0x7f00000000c0)='./file0\x00', 0x0, 0x18}, 0x18)
bpf$PROG_BIND_MAP(0x23, &(0x7f0000000280)={r10, r0}, 0xc)
ioctl$UFFDIO_API(r4, 0xc018aa3f, &(0x7f00000002c0)={0xaa, 0x100})
mount$9p_fd(0x0, &(0x7f0000000000)='./file0\x00', &(0x7f0000000080), 0x0, &(0x7f0000000400)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX=r0, @ANYBLOB=',wfdno=', @ANYRES8=r9])

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
single: successfully extracted reproducer
found reproducer with 26 syscalls
minimizing guilty program
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap-ioctl$TUNGETVNETLE-bpf$OBJ_GET_PROG-bpf$PROG_BIND_MAP-ioctl$UFFDIO_API
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
r4 = userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r5 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r5)
r6 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r7=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r8=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r6}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r7}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r8}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r9 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r9, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r5, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r5, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)
ioctl$TUNGETVNETLE(r0, 0x800454dd, &(0x7f0000000040))
r10 = bpf$OBJ_GET_PROG(0x7, &(0x7f0000000100)=@generic={&(0x7f00000000c0)='./file0\x00', 0x0, 0x18}, 0x18)
bpf$PROG_BIND_MAP(0x23, &(0x7f0000000280)={r10, r0}, 0xc)
ioctl$UFFDIO_API(r4, 0xc018aa3f, &(0x7f00000002c0)={0xaa, 0x100})

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap-ioctl$TUNGETVNETLE-bpf$OBJ_GET_PROG-bpf$PROG_BIND_MAP
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)
ioctl$TUNGETVNETLE(r0, 0x800454dd, &(0x7f0000000040))
r9 = bpf$OBJ_GET_PROG(0x7, &(0x7f0000000100)=@generic={&(0x7f00000000c0)='./file0\x00', 0x0, 0x18}, 0x18)
bpf$PROG_BIND_MAP(0x23, &(0x7f0000000280)={r9, r0}, 0xc)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap-ioctl$TUNGETVNETLE-bpf$OBJ_GET_PROG
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)
ioctl$TUNGETVNETLE(r0, 0x800454dd, &(0x7f0000000040))
bpf$OBJ_GET_PROG(0x7, &(0x7f0000000100)=@generic={&(0x7f00000000c0)='./file0\x00', 0x0, 0x18}, 0x18)

program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap-ioctl$TUNGETVNETLE
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)
ioctl$TUNGETVNETLE(r0, 0x800454dd, &(0x7f0000000040))

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE-mremap
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000001200))
mremap(&(0x7f0000a96000/0x1000)=nil, 0x1000, 0x400000, 0x3, &(0x7f0000000000/0x400000)=nil)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE-ioctl$TUNGETVNETLE
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000001200))

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD-ioctl$TUNGETVNETLE
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)
ioctl$TUNGETVNETLE(r4, 0x40047459, &(0x7f0000000180))

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp-ioctl$TUNSETOFFLOAD
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
r8 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TUNSETOFFLOAD(r8, 0xc004743e, 0x110e22fff6)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse-openat$ppp
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")
openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat-syz_mount_image$fuse
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
r5 = ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380)={0x0, <r6=>0x0}, &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480)={0x0, 0x0, 0x0, 0x0, <r7=>0x0})
syz_mount_image$fuse(&(0x7f0000000300), &(0x7f0000000340)='./file0\x00', 0x20, &(0x7f0000000500)={{'fd', 0x3d, r5}, 0x2c, {'rootmode', 0x3d, 0x8000}, 0x2c, {'user_id', 0x3d, r6}, 0x2c, {'group_id', 0x3d, 0xee00}, 0x2c, {[], [{@appraise}, {@fowner_eq={'fowner', 0x3d, r7}}]}}, 0x1, 0x0, &(0x7f00000005c0)="8ceb3d451f431775ac41aff9e7f7598504c9211dd6db4e1f636e6f440b3bf20d331b36c1872a901017ab43e99b58e984d4775a0d")

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred-lstat
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380), &(0x7f00000003c0)=0xc)
lstat(&(0x7f0000000440)='./file0\x00', &(0x7f0000000480))

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm-getsockopt$sock_cred
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)
getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000380), &(0x7f00000003c0)=0xc)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-close
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
r4 = openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
close(r4)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-openat$tun-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
openat$tun(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-bpf$PROG_LOAD-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
bpf$PROG_LOAD(0x5, &(0x7f00000001c0)={0x11, 0x2000000000000207, &(0x7f0000000180)=ANY=[@ANYRES16], 0x0, 0x0, 0x0, 0x0, 0x41100, 0x0, '\x00', 0x0, @fallback=0x2e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0}, 0x94)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-userfaultfd-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
userfaultfd(0x80001)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
r3 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r3, &(0x7f0000000200)=@pppol2tp={0x18, 0x1, {0x0, r3, {0x2, 0x4e23, @rand_addr=0x64010102}, 0x3, 0x0, 0x1}}, 0x26)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-socket$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
socket$pppl2tp(0x18, 0x1, 0x1)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-socket$inet6_udp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$pppl2tp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, 0xffffffffffffffff, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-close-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-openat-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): fsopen-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
fsopen(&(0x7f0000000140)='fuseblk\x00', 0x0)
close(0xffffffffffffffff)
r0 = socket$pppl2tp(0x18, 0x1, 0x1)
r1 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r0, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r1, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(0xffffffffffffffff, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, 0x0, 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
testing program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, 0x0, 0x0)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program did not crash
extracting C reproducer
testing compiled C program (duration=33.631610251s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Write in pppol2tp_release
simplifying C reproducer
testing compiled C program (duration=33.631610251s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=33.631610251s, {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: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}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Write in pppol2tp_release
testing compiled C program (duration=33.631610251s, {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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=33.631610251s, {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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=33.631610251s, {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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing compiled C program (duration=33.631610251s, {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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
testing program (duration=33.631610251s, {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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
testing program (duration=33.631610251s, {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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session
validation run: crashed=true
testing program (duration=33.631610251s, {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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-close-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$KVM_GET_STATS_FD_vm
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x40042, 0x1)
close(r0)
r1 = socket$pppl2tp(0x18, 0x1, 0x1)
r2 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$pppl2tp(r1, &(0x7f0000000240)=@pppol2tpin6={0x18, 0x1, {0x0, r2, 0x208, 0x0, 0x0, 0x0, {0xa, 0x4e22, 0x0, @rand_addr=' \x01\x00', 0x2000000}}}, 0x32)
ioctl$KVM_GET_STATS_FD_vm(r0, 0xaece)

program crashed: KASAN: use-after-free Write in pppol2tp_release
validation run: crashed=true
reproducing took 30m30.494881142s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
Write of size 8 at addr ffff88810eb3f950 by task syz.2.17/369

CPU: 1 PID: 369 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f860c1d6e59
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:00007ffed65c32b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffed65c33a0 RCX: 00007f860c1d6e59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000006068 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b32c20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f860c45efac R14: 00007f860c45efa8 R15: 00007f860c45efa0

Allocated by task 369:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 369:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff88810eb3f800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff88810eb3f800, ffff88810eb3fa00)
The buggy address belongs to the page:
page:ffffea00043acf00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10eb3c
head:ffffea00043acf00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 365, ts 24694308529, free_ts 24145373837
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb30 net/netlink/af_netlink.c:2443
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2514
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page mm/page_alloc.c:5443 [inline]
 __free_pages+0x146/0x390 mm/page_alloc.c:5454
 __vunmap+0x801/0x980 mm/vmalloc.c:2307
 __vfree mm/vmalloc.c:2356 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2387
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:873
 do_group_exit+0x149/0x310 kernel/exit.c:987
 get_signal+0xfb1/0x1300 kernel/signal.c:2794
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56

Memory state around the buggy address:
 ffff88810eb3f800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810eb3f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810eb3f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88810eb3f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810eb3fa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
Write of size 8 at addr ffff88810eb3f950 by task syz.2.17/369

CPU: 1 PID: 369 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x85/0xf0 kernel/locking/mutex.c:298
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:442
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f860c1d6e59
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:00007ffed65c32b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffed65c33a0 RCX: 00007f860c1d6e59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000006068 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b32c20000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f860c45efac R14: 00007f860c45efa8 R15: 00007f860c45efa0

Allocated by task 369:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x19f/0x330 mm/slub.c:4038
 kmalloc include/linux/slab.h:560 [inline]
 kzalloc include/linux/slab.h:667 [inline]
 l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772
 __sys_connect_file net/socket.c:1867 [inline]
 __sys_connect+0x3ce/0x450 net/socket.c:1884
 __do_sys_connect net/socket.c:1894 [inline]
 __se_sys_connect net/socket.c:1891 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:1891
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 369:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kfree+0xc0/0x270 mm/slub.c:4196
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xb2/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:439
 __sock_release net/socket.c:597 [inline]
 sock_close+0xb8/0x200 net/socket.c:1287
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff88810eb3f800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff88810eb3f800, ffff88810eb3fa00)
The buggy address belongs to the page:
page:ffffea00043acf00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10eb3c
head:ffffea00043acf00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 365, ts 24694308529, free_ts 24145373837
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 __kmalloc_track_caller+0x1e4/0x310 mm/slub.c:4541
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xdc/0x520 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x35c/0xb30 net/netlink/af_netlink.c:2443
 netlink_rcv_skb+0x267/0x430 net/netlink/af_netlink.c:2514
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x467/0x620 net/socket.c:2007
 __do_sys_sendto net/socket.c:2019 [inline]
 __se_sys_sendto net/socket.c:2015 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2015
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page mm/page_alloc.c:5443 [inline]
 __free_pages+0x146/0x390 mm/page_alloc.c:5454
 __vunmap+0x801/0x980 mm/vmalloc.c:2307
 __vfree mm/vmalloc.c:2356 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2387
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:873
 do_group_exit+0x149/0x310 kernel/exit.c:987
 get_signal+0xfb1/0x1300 kernel/signal.c:2794
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56

Memory state around the buggy address:
 ffff88810eb3f800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810eb3f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810eb3f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88810eb3f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810eb3fa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================