Extracting prog: 1m57.827052979s
Minimizing prog: 6m45.550723179s
Simplifying prog options: 0s
Extracting C: 25.470409332s
Simplifying C: 12m46.213159129s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)

program did not crash
testing program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
testing program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$eJzslbFrFEEUxr+Z3dtcogQttLA5i4ARzN7unkoawdgLQiJqeZgxnNnkwt0VuQNJggg21uI/YpHKwk4rawsVBAtTCoLgyMzO3s56u0mOHDa+H9zeN7Pz3rw3+/YtCIL4b/ny+cenF7cWV64AOI05TJn5b062hpv/ZwA+vnIqZvh2c/bJvtE307UMgJSZrXvE/h6AN0sOsJu4ldK2BuaMzxVwrRV3wXHZ6Htg8NNYZWYtwPDATD/eksNs2tNGxII9bMerj1qxCNQl5K1YREo1pCGN/2CPYRVA1WzBrPi6/cF6MwY6iYhFKioy3Wfk1rgid2A7+fPT8S1x3LCOQD2v+8+f7qmxb+YD6/xCcIRGN8CwbPQipuD7fs0MRWjlf8HN/DvJY0vYLYhbHVBhJtWTHcS44uxCwS1V4YebT8dCZbuepnjcTaslt37LieYlpdxRwsuVoL0mLdBjOVSpnjgwtdv4Vrw2auUd4UcYcaqsxopF+k6rGdbtD3DGWsPskjh/sP9u1M/Xf1a0kxe6cf31lF+qsvkwE8e3C63O5WYulrwy3mEvSNafmAtcsvqTa30V6r2NrXq3P1hobTTXxJrYjKLG9eBqEFyL6ro3J1eU4aKq+9OM5b9SstZjHrabvV4n3AZ6nXA4jpKr1XGXX7e/axuu+x/H/K/so6DTTj+ULL8HMz+u/5Wad0qDJwiCIAiCIAiCIAiCIAiCGIefNTC8nx2OZTFudEff/hMAAP//uVBcmw==")
openat(0xffffffffffffffff, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(0xffffffffffffffff, 0xfcff, 0x0, 0x3)

program did not crash
testing program (duration=46.553053035s, {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: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-openat-fadvise64
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
testing program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, 0x0, 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
testing program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, 0x0, 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
extracting C reproducer
testing compiled C program (duration=46.553053035s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
simplifying C reproducer
testing compiled C program (duration=46.553053035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: slab-out-of-bounds Read in z_erofs_transform_plain
a never seen crash title: KASAN: slab-out-of-bounds Read in z_erofs_transform_plain, ignore
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program did not crash
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program did not crash
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true 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}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true 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}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: slab-out-of-bounds Read in z_erofs_transform_plain
a never seen crash title: KASAN: slab-out-of-bounds Read in z_erofs_transform_plain, ignore
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program did not crash
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true 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}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program did not crash
testing compiled C program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program crashed: KASAN: slab-out-of-bounds Read in z_erofs_transform_plain
validation run: crashed=true
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
validation run: crashed=false
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$eJzslbFrFEEUxr+Z3dtcogQttLA5i4ARzN7unkoawdgLQiJqeZgxnNnkwt0VuQNJggg21uI/YpHKwk4rawsVBAtTCoLgyMzO3s56u0mOHDa+H9zeN7Pz3rw3+/YtCIL4b/ny+cenF7cWV64AOI05TJn5b062hpv/ZwA+vnIqZvh2c/bJvtE307UMgJSZrXvE/h6AN0sOsJu4ldK2BuaMzxVwrRV3wXHZ6Htg8NNYZWYtwPDATD/eksNs2tNGxII9bMerj1qxCNQl5K1YREo1pCGN/2CPYRVA1WzBrPi6/cF6MwY6iYhFKioy3Wfk1rgid2A7+fPT8S1x3LCOQD2v+8+f7qmxb+YD6/xCcIRGN8CwbPQipuD7fs0MRWjlf8HN/DvJY0vYLYhbHVBhJtWTHcS44uxCwS1V4YebT8dCZbuepnjcTaslt37LieYlpdxRwsuVoL0mLdBjOVSpnjgwtdv4Vrw2auUd4UcYcaqsxopF+k6rGdbtD3DGWsPskjh/sP9u1M/Xf1a0kxe6cf31lF+qsvkwE8e3C63O5WYulrwy3mEvSNafmAtcsvqTa30V6r2NrXq3P1hobTTXxJrYjKLG9eBqEFyL6ro3J1eU4aKq+9OM5b9SstZjHrabvV4n3AZ6nXA4jpKr1XGXX7e/axuu+x/H/K/so6DTTj+ULL8HMz+u/5Wad0qDJwiCIAiCIAiCIAiCIAiCGIefNTC8nx2OZTFudEff/hMAAP//uVBcmw==")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
validation run: crashed=false
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
validation run: crashed=true
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$eJzslbFrFEEUxr+Z3dtcogQttLA5i4ARzN7unkoawdgLQiJqeZgxnNnkwt0VuQNJggg21uI/YpHKwk4rawsVBAtTCoLgyMzO3s56u0mOHDa+H9zeN7Pz3rw3+/YtCIL4b/ny+cenF7cWV64AOI05TJn5b062hpv/ZwA+vnIqZvh2c/bJvtE307UMgJSZrXvE/h6AN0sOsJu4ldK2BuaMzxVwrRV3wXHZ6Htg8NNYZWYtwPDATD/eksNs2tNGxII9bMerj1qxCNQl5K1YREo1pCGN/2CPYRVA1WzBrPi6/cF6MwY6iYhFKioy3Wfk1rgid2A7+fPT8S1x3LCOQD2v+8+f7qmxb+YD6/xCcIRGN8CwbPQipuD7fs0MRWjlf8HN/DvJY0vYLYhbHVBhJtWTHcS44uxCwS1V4YebT8dCZbuepnjcTaslt37LieYlpdxRwsuVoL0mLdBjOVSpnjgwtdv4Vrw2auUd4UcYcaqsxopF+k6rGdbtD3DGWsPskjh/sP9u1M/Xf1a0kxe6cf31lF+qsvkwE8e3C63O5WYulrwy3mEvSNafmAtcsvqTa30V6r2NrXq3P1hobTTXxJrYjKLG9eBqEFyL6ro3J1eU4aKq+9OM5b9SstZjHrabvV4n3AZ6nXA4jpKr1XGXX7e/axuu+x/H/K/so6DTTj+ULL8HMz+u/5Wad0qDJwiCIAiCIAiCIAiCIAiCGIefNTC8nx2OZTFudEff/hMAAP//uVBcmw==")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program did not crash
validation run: crashed=false
testing program (duration=46.553053035s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$erofs-openat-openat-fadvise64
detailed listing:
executing program 0:
syz_mount_image$erofs(&(0x7f0000000200), &(0x7f0000000100)='./file0\x00', 0x810801, &(0x7f0000000000)=ANY=[], 0x4, 0x232, &(0x7f0000000480)="$eJzslbFrFEEUxr+Z3dtcogQttLA5i4ARzN7unkoawdgLQiJqeZgxnNnkwt0VuQNJggg21uI/YpHKwk4rawsVBAtTCoLgyMzO3s56u0mOHDa+H9zeN7Pz3rw3+/YtCIL4b/ny+cenF7cWV64AOI05TJn5b062hpv/ZwA+vnIqZvh2c/bJvtE307UMgJSZrXvE/h6AN0sOsJu4ldK2BuaMzxVwrRV3wXHZ6Htg8NNYZWYtwPDATD/eksNs2tNGxII9bMerj1qxCNQl5K1YREo1pCGN/2CPYRVA1WzBrPi6/cF6MwY6iYhFKioy3Wfk1rgid2A7+fPT8S1x3LCOQD2v+8+f7qmxb+YD6/xCcIRGN8CwbPQipuD7fs0MRWjlf8HN/DvJY0vYLYhbHVBhJtWTHcS44uxCwS1V4YebT8dCZbuepnjcTaslt37LieYlpdxRwsuVoL0mLdBjOVSpnjgwtdv4Vrw2auUd4UcYcaqsxopF+k6rGdbtD3DGWsPskjh/sP9u1M/Xf1a0kxe6cf31lF+qsvkwE8e3C63O5WYulrwy3mEvSNafmAtcsvqTa30V6r2NrXq3P1hobTTXxJrYjKLG9eBqEFyL6ro3J1eU4aKq+9OM5b9SstZjHrabvV4n3AZ6nXA4jpKr1XGXX7e/axuu+x/H/K/so6DTTj+ULL8HMz+u/5Wad0qDJwiCIAiCIAiCIAiCIAiCGIefNTC8nx2OZTFudEff/hMAAP//uVBcmw==")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
openat(r0, &(0x7f0000000080)='./file0\x00', 0x10400, 0x0)
fadvise64(r0, 0xfcff, 0x0, 0x3)

program crashed: KASAN: use-after-free Read in z_erofs_transform_plain
validation run: crashed=true
reproducing took 28m1.712720213s
repro crashed as (corrupted=false):
loop0: rw=524288, sector=16, nr_sectors = 16 limit=16
syz.0.17: attempt to access beyond end of device
loop0: rw=524288, sector=14425508768, nr_sectors = 8 limit=16
==================================================================
BUG: KASAN: use-after-free in memcpy_to_page include/linux/highmem.h:403 [inline]
BUG: KASAN: use-after-free in z_erofs_transform_plain+0x3a4/0x490 fs/erofs/decompressor.c:346
Read of size 1622 at addr ffff0000d3a13e5b by task syz.0.17/4520

CPU: 0 PID: 4520 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x258/0x290 mm/kasan/generic.c:189
 memcpy+0x48/0x90 mm/kasan/shadow.c:65
 memcpy_to_page include/linux/highmem.h:403 [inline]
 z_erofs_transform_plain+0x3a4/0x490 fs/erofs/decompressor.c:346
 z_erofs_decompress+0x9c/0xd4 fs/erofs/decompressor.c:434
 z_erofs_decompress_pcluster fs/erofs/zdata.c:1159 [inline]
 z_erofs_decompress_queue+0x100c/0x1b40 fs/erofs/zdata.c:1240
 z_erofs_runqueue+0x152c/0x16cc fs/erofs/zdata.c:1603
 z_erofs_readahead+0x84c/0xbf4 fs/erofs/zdata.c:1739
 read_pages+0x158/0x680 mm/readahead.c:161
 page_cache_ra_unbounded+0x490/0x574 mm/readahead.c:270
 do_page_cache_ra mm/readahead.c:300 [inline]
 force_page_cache_ra+0x248/0x2b0 mm/readahead.c:331
 force_page_cache_readahead mm/internal.h:125 [inline]
 generic_fadvise+0x340/0x5b8 mm/fadvise.c:107
 vfs_fadvise mm/fadvise.c:185 [inline]
 ksys_fadvise64_64 mm/fadvise.c:199 [inline]
 __do_sys_fadvise64_64 mm/fadvise.c:207 [inline]
 __se_sys_fadvise64_64 mm/fadvise.c:205 [inline]
 __arm64_sys_fadvise64_64+0x12c/0x174 mm/fadvise.c:205
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:000000000a2b55f9 refcount:2 mapcount:0 mapping:00000000945dc32e index:0x1 pfn:0x113a13
memcg:ffff0000dab96000
aops:managed_cache_aops ino:0
flags: 0x5ffd00000002014(uptodate|lru|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd00000002014 fffffc0003aff708 fffffc0003a75308 ffff0000e57107c8
raw: 0000000000000001 ffff0000c8518000 00000002ffffffff ffff0000dab96000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d3a13f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000d3a13f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000d3a14000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff0000d3a14080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d3a14100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
loop0: rw=524288, sector=16, nr_sectors = 16 limit=16
syz.0.17: attempt to access beyond end of device
loop0: rw=524288, sector=14425508768, nr_sectors = 8 limit=16
==================================================================
BUG: KASAN: use-after-free in memcpy_to_page include/linux/highmem.h:403 [inline]
BUG: KASAN: use-after-free in z_erofs_transform_plain+0x3a4/0x490 fs/erofs/decompressor.c:346
Read of size 1622 at addr ffff0000d3a13e5b by task syz.0.17/4520

CPU: 0 PID: 4520 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x258/0x290 mm/kasan/generic.c:189
 memcpy+0x48/0x90 mm/kasan/shadow.c:65
 memcpy_to_page include/linux/highmem.h:403 [inline]
 z_erofs_transform_plain+0x3a4/0x490 fs/erofs/decompressor.c:346
 z_erofs_decompress+0x9c/0xd4 fs/erofs/decompressor.c:434
 z_erofs_decompress_pcluster fs/erofs/zdata.c:1159 [inline]
 z_erofs_decompress_queue+0x100c/0x1b40 fs/erofs/zdata.c:1240
 z_erofs_runqueue+0x152c/0x16cc fs/erofs/zdata.c:1603
 z_erofs_readahead+0x84c/0xbf4 fs/erofs/zdata.c:1739
 read_pages+0x158/0x680 mm/readahead.c:161
 page_cache_ra_unbounded+0x490/0x574 mm/readahead.c:270
 do_page_cache_ra mm/readahead.c:300 [inline]
 force_page_cache_ra+0x248/0x2b0 mm/readahead.c:331
 force_page_cache_readahead mm/internal.h:125 [inline]
 generic_fadvise+0x340/0x5b8 mm/fadvise.c:107
 vfs_fadvise mm/fadvise.c:185 [inline]
 ksys_fadvise64_64 mm/fadvise.c:199 [inline]
 __do_sys_fadvise64_64 mm/fadvise.c:207 [inline]
 __se_sys_fadvise64_64 mm/fadvise.c:205 [inline]
 __arm64_sys_fadvise64_64+0x12c/0x174 mm/fadvise.c:205
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:000000000a2b55f9 refcount:2 mapcount:0 mapping:00000000945dc32e index:0x1 pfn:0x113a13
memcg:ffff0000dab96000
aops:managed_cache_aops ino:0
flags: 0x5ffd00000002014(uptodate|lru|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd00000002014 fffffc0003aff708 fffffc0003a75308 ffff0000e57107c8
raw: 0000000000000001 ffff0000c8518000 00000002ffffffff ffff0000dab96000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d3a13f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000d3a13f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000d3a14000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff0000d3a14080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d3a14100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================