Extracting prog: 2m33.683422486s
Minimizing prog: 11m56.708791736s
Simplifying prog options: 0s
Extracting C: 31.084746862s
Simplifying C: 23m33.728056132s


extracting reproducer from 24 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program crashed: KASAN: use-after-free Write in fuse_copy_do
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=47.303203065s, {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$fuse-mount$fuse
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})

program did not crash
testing program (duration=47.303203065s, {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$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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}}): mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(0xffffffffffffffff, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, 0x0, 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, 0x0, &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', 0x0, 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, 0x0)
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
testing program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=47.303203065s, {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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
simplifying C reproducer
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program did not crash
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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: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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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: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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program did not crash
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true 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$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program did not crash
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program crashed: KASAN: use-after-free Write in fuse_copy_do
testing compiled C program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
program did not crash
testing program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program crashed: KASAN: use-after-free Write in fuse_copy_do
validation run: crashed=true
testing program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program did not crash
validation run: crashed=false
testing program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program crashed: KASAN: use-after-free Write in fuse_copy_do
validation run: crashed=true
testing program (duration=47.303203065s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none 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:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$fuse-mount$fuse-write$FUSE_NOTIFY_STORE
detailed listing:
executing program 0:
r0 = openat$fuse(0xffffffffffffff9c, &(0x7f0000000140), 0x2, 0x0)
mount$fuse(0x0, &(0x7f0000002880)='.\x00', &(0x7f00000028c0), 0x4001, &(0x7f00000000c0)={{'fd', 0x3d, r0}, 0x2c, {'rootmode', 0x3d, 0x4000}})
write$FUSE_NOTIFY_STORE(r0, &(0x7f0000000080)={0x2a, 0x4, 0x0, {0x1, 0x7fff, 0x2, 0x0, [0x0, 0x0]}}, 0x2a)

program crashed: KASAN: use-after-free Write in fuse_copy_do
validation run: crashed=true
reproducing took 43m31.017170246s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in fuse_copy_do+0x193/0x380 fs/fuse/dev.c:-1
Write of size 2 at addr ffff88806b776fff by task syz.0.17/5979

CPU: 1 UID: 0 PID: 5979 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 fuse_copy_do+0x193/0x380 fs/fuse/dev.c:-1
 fuse_copy_folio+0xefc/0x1b00 fs/fuse/dev.c:1166
 fuse_notify_store fs/fuse/dev.c:1821 [inline]
 fuse_notify fs/fuse/dev.c:2109 [inline]
 fuse_dev_do_write+0x2b9d/0x4060 fs/fuse/dev.c:2205
 fuse_dev_write+0x177/0x220 fs/fuse/dev.c:2289
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6dc79c799
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:00007ffe111ae6e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc6dca15fa0 RCX: 00007fc6dc79c799
RDX: 000000000000002a RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fc6dc832bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6dca15fac R14: 00007fc6dca15fa0 R15: 00007fc6dca15fa0
 </TASK>

The buggy address belongs to the physical page:
page: refcount:3 mapcount:0 mapping:ffff8880569dcf20 index:0x7 pfn:0x6b776
memcg:ffff88802d9e9880
aops:empty_aops ino:1 dentry name(?):"/"
flags: 0xfff00000000005(locked|referenced|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000005 0000000000000000 dead000000000122 ffff8880569dcf20
raw: 0000000000000007 0000000000000000 00000003ffffffff ffff88802d9e9880
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5979, tgid 5979 (syz.0.17), ts 86096551103, free_ts 85712953532
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1892
 prep_new_page mm/page_alloc.c:1900 [inline]
 get_page_from_freelist+0x23a1/0x2440 mm/page_alloc.c:3965
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5253
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2484
 alloc_frozen_pages_noprof mm/mempolicy.c:2555 [inline]
 alloc_pages_noprof+0xa8/0x190 mm/mempolicy.c:2575
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2585
 filemap_alloc_folio_noprof+0x111/0x470 mm/filemap.c:1013
 __filemap_get_folio_mpol+0x3fc/0xb00 mm/filemap.c:2011
 __filemap_get_folio include/linux/pagemap.h:774 [inline]
 filemap_grab_folio include/linux/pagemap.h:854 [inline]
 fuse_notify_store fs/fuse/dev.c:1813 [inline]
 fuse_notify fs/fuse/dev.c:2109 [inline]
 fuse_dev_do_write+0x298b/0x4060 fs/fuse/dev.c:2205
 fuse_dev_write+0x177/0x220 fs/fuse/dev.c:2289
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5978 tgid 5978 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1436 [inline]
 free_unref_folios+0xd71/0x1530 mm/page_alloc.c:3043
 folios_put_refs+0x9ff/0xb40 mm/swap.c:1008
 free_pages_and_swap_cache+0x537/0x5b0 mm/swap_state.c:404
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:151 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:417 [inline]
 tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424
 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549
 exit_mmap+0x498/0xa10 mm/mmap.c:1315
 __mmput+0x118/0x430 kernel/fork.c:1179
 exit_mm+0x18e/0x250 kernel/exit.c:581
 do_exit+0x8b9/0x2580 kernel/exit.c:962
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1116
 __do_sys_exit_group kernel/exit.c:1127 [inline]
 __se_sys_exit_group kernel/exit.c:1125 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1125
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88806b776f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806b776f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806b777000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88806b777080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806b777100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in fuse_copy_do+0x193/0x380 fs/fuse/dev.c:-1
Write of size 2 at addr ffff88806b776fff by task syz.0.17/5979

CPU: 1 UID: 0 PID: 5979 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 fuse_copy_do+0x193/0x380 fs/fuse/dev.c:-1
 fuse_copy_folio+0xefc/0x1b00 fs/fuse/dev.c:1166
 fuse_notify_store fs/fuse/dev.c:1821 [inline]
 fuse_notify fs/fuse/dev.c:2109 [inline]
 fuse_dev_do_write+0x2b9d/0x4060 fs/fuse/dev.c:2205
 fuse_dev_write+0x177/0x220 fs/fuse/dev.c:2289
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6dc79c799
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:00007ffe111ae6e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc6dca15fa0 RCX: 00007fc6dc79c799
RDX: 000000000000002a RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fc6dc832bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6dca15fac R14: 00007fc6dca15fa0 R15: 00007fc6dca15fa0
 </TASK>

The buggy address belongs to the physical page:
page: refcount:3 mapcount:0 mapping:ffff8880569dcf20 index:0x7 pfn:0x6b776
memcg:ffff88802d9e9880
aops:empty_aops ino:1 dentry name(?):"/"
flags: 0xfff00000000005(locked|referenced|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000005 0000000000000000 dead000000000122 ffff8880569dcf20
raw: 0000000000000007 0000000000000000 00000003ffffffff ffff88802d9e9880
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5979, tgid 5979 (syz.0.17), ts 86096551103, free_ts 85712953532
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1892
 prep_new_page mm/page_alloc.c:1900 [inline]
 get_page_from_freelist+0x23a1/0x2440 mm/page_alloc.c:3965
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5253
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2484
 alloc_frozen_pages_noprof mm/mempolicy.c:2555 [inline]
 alloc_pages_noprof+0xa8/0x190 mm/mempolicy.c:2575
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2585
 filemap_alloc_folio_noprof+0x111/0x470 mm/filemap.c:1013
 __filemap_get_folio_mpol+0x3fc/0xb00 mm/filemap.c:2011
 __filemap_get_folio include/linux/pagemap.h:774 [inline]
 filemap_grab_folio include/linux/pagemap.h:854 [inline]
 fuse_notify_store fs/fuse/dev.c:1813 [inline]
 fuse_notify fs/fuse/dev.c:2109 [inline]
 fuse_dev_do_write+0x298b/0x4060 fs/fuse/dev.c:2205
 fuse_dev_write+0x177/0x220 fs/fuse/dev.c:2289
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5978 tgid 5978 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1436 [inline]
 free_unref_folios+0xd71/0x1530 mm/page_alloc.c:3043
 folios_put_refs+0x9ff/0xb40 mm/swap.c:1008
 free_pages_and_swap_cache+0x537/0x5b0 mm/swap_state.c:404
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:151 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:417 [inline]
 tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:424
 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:549
 exit_mmap+0x498/0xa10 mm/mmap.c:1315
 __mmput+0x118/0x430 kernel/fork.c:1179
 exit_mm+0x18e/0x250 kernel/exit.c:581
 do_exit+0x8b9/0x2580 kernel/exit.c:962
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1116
 __do_sys_exit_group kernel/exit.c:1127 [inline]
 __se_sys_exit_group kernel/exit.c:1125 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1125
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88806b776f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806b776f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806b777000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88806b777080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806b777100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================