Extracting prog: 1m9.441073631s
Minimizing prog: 3m37.543515218s
Simplifying prog options: 0s
Extracting C: 31.643829448s
Simplifying C: 5m59.072779381s


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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=33.131358877s, {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}}): syz_mount_image$ext4-openat-lseek
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)

program did not crash
testing program (duration=33.131358877s, {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}}): syz_mount_image$ext4-openat-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
testing program (duration=33.131358877s, {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}}): syz_mount_image$ext4-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
lseek(0xffffffffffffffff, 0x3ff, 0x0)
getdents64(0xffffffffffffffff, 0x0, 0x0)

program did not crash
testing program (duration=33.131358877s, {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-lseek-getdents64
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
testing program (duration=33.131358877s, {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}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, 0x0, 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=33.131358877s, {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}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
simplifying C reproducer
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {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}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program did not crash
testing compiled C program (duration=33.131358877s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
a never seen crash title: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry, ignore
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false 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}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program did not crash
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
a never seen crash title: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry, ignore
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program did not crash
testing compiled C program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true 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}}): syz_mount_image$ext4-openat-lseek-getdents64
program did not crash
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
validation run: crashed=true
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
validation run: crashed=true
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=33.131358877s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
detailed listing:
executing program 0:
syz_mount_image$ext4(&(0x7f0000000040)='ext4\x00', &(0x7f0000000380)='./file0\x00', 0x22000011, &(0x7f0000000000)={[{@commit}, {@noblock_validity}, {@user_xattr}]}, 0x86, 0x48e, &(0x7f00000008c0)="$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")
r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='.\x00', 0x0, 0x0)
lseek(r0, 0x3ff, 0x0)
getdents64(r0, 0x0, 0x0)

program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
validation run: crashed=true
reproducing took 15m10.228017502s
repro crashed as (corrupted=false):
EXT4-fs warning (device loop2): dx_probe:893: inode #2: comm syz.2.17: dx entry: limit 65535 != root limit 120
EXT4-fs warning (device loop2): dx_probe:966: inode #2: comm syz.2.17: Corrupt directory, running e2fsck is recommended
==================================================================
BUG: KASAN: slab-out-of-bounds in __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
Read of size 2 at addr ffff88812f294003 by task syz.2.17/374

CPU: 0 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report_generic.c:349
 __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
 ext4_readdir+0x1315/0x3e10 fs/ext4/dir.c:261
 iterate_dir+0x271/0x610 fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0xf2/0x250 fs/readdir.c:354
 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
 x64_sys_call+0x15c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f032199ce59
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:00007ffe2a6d78a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f0321c15fa0 RCX: 00007f032199ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f0321a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0321c15fac R14: 00007f0321c15fa0 R15: 00007f0321c15fa0
 </TASK>

The buggy address belongs to the object at ffff88812f294000
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 3 bytes inside of
 16-byte region [ffff88812f294000, ffff88812f294010)

The buggy address belongs to the physical page:
page:ffffea0004bca500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12f294
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042480
raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 374, tgid 374 (syz.2.17), ts 27118736912, free_ts 27110966533
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5929
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa0/0x1e0 mm/slab_common.c:958
 kmemdup_nul+0x31/0xa0 mm/util.c:157
 vfs_parse_fs_string fs/fs_context.c:178 [inline]
 generic_parse_monolithic+0x24d/0x360 fs/fs_context.c:224
 parse_monolithic_mount_data+0x7a/0x90 fs/fs_context.c:689
 do_new_mount+0x222/0xb30 fs/namespace.c:3077
 path_mount+0x659/0xfc0 fs/namespace.c:3411
 do_mount fs/namespace.c:3424 [inline]
 __do_sys_mount fs/namespace.c:3632 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3609
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x7f8/0x800 mm/page_alloc.c:3620
 free_unref_page_list+0x117/0x8c0 mm/page_alloc.c:3771
 release_pages+0xc93/0xcf0 mm/swap.c:1053
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:316
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1aa/0x370 mm/mmu_gather.c:361
 unmap_region+0x2b7/0x320 mm/mmap.c:2419
 do_mas_align_munmap+0xbed/0x1320 mm/mmap.c:2693
 do_mas_munmap+0x241/0x2b0 mm/mmap.c:2751
 __vm_munmap+0x1bd/0x330 mm/mmap.c:3050
 __do_sys_munmap mm/mmap.c:3076 [inline]
 __se_sys_munmap mm/mmap.c:3072 [inline]
 __x64_sys_munmap+0x6b/0x80 mm/mmap.c:3072
 x64_sys_call+0x8a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88812f293f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812f293f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812f294000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88812f294080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88812f294100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs error (device loop2): ext4_readdir:263: inode #2: block 3: comm syz.2.17: path /0/file0: bad entry in directory: rec_len is smaller than minimal - offset=1023, inode=255, rec_len=0, size=1024 fake=0

final repro crashed as (corrupted=false):
EXT4-fs warning (device loop2): dx_probe:893: inode #2: comm syz.2.17: dx entry: limit 65535 != root limit 120
EXT4-fs warning (device loop2): dx_probe:966: inode #2: comm syz.2.17: Corrupt directory, running e2fsck is recommended
==================================================================
BUG: KASAN: slab-out-of-bounds in __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
Read of size 2 at addr ffff88812f294003 by task syz.2.17/374

CPU: 0 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report_generic.c:349
 __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
 ext4_readdir+0x1315/0x3e10 fs/ext4/dir.c:261
 iterate_dir+0x271/0x610 fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0xf2/0x250 fs/readdir.c:354
 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
 x64_sys_call+0x15c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f032199ce59
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:00007ffe2a6d78a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f0321c15fa0 RCX: 00007f032199ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f0321a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0321c15fac R14: 00007f0321c15fa0 R15: 00007f0321c15fa0
 </TASK>

The buggy address belongs to the object at ffff88812f294000
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 3 bytes inside of
 16-byte region [ffff88812f294000, ffff88812f294010)

The buggy address belongs to the physical page:
page:ffffea0004bca500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12f294
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042480
raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 374, tgid 374 (syz.2.17), ts 27118736912, free_ts 27110966533
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5929
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa0/0x1e0 mm/slab_common.c:958
 kmemdup_nul+0x31/0xa0 mm/util.c:157
 vfs_parse_fs_string fs/fs_context.c:178 [inline]
 generic_parse_monolithic+0x24d/0x360 fs/fs_context.c:224
 parse_monolithic_mount_data+0x7a/0x90 fs/fs_context.c:689
 do_new_mount+0x222/0xb30 fs/namespace.c:3077
 path_mount+0x659/0xfc0 fs/namespace.c:3411
 do_mount fs/namespace.c:3424 [inline]
 __do_sys_mount fs/namespace.c:3632 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3609
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x7f8/0x800 mm/page_alloc.c:3620
 free_unref_page_list+0x117/0x8c0 mm/page_alloc.c:3771
 release_pages+0xc93/0xcf0 mm/swap.c:1053
 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:316
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu mm/mmu_gather.c:261 [inline]
 tlb_finish_mmu+0x1aa/0x370 mm/mmu_gather.c:361
 unmap_region+0x2b7/0x320 mm/mmap.c:2419
 do_mas_align_munmap+0xbed/0x1320 mm/mmap.c:2693
 do_mas_munmap+0x241/0x2b0 mm/mmap.c:2751
 __vm_munmap+0x1bd/0x330 mm/mmap.c:3050
 __do_sys_munmap mm/mmap.c:3076 [inline]
 __se_sys_munmap mm/mmap.c:3072 [inline]
 __x64_sys_munmap+0x6b/0x80 mm/mmap.c:3072
 x64_sys_call+0x8a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88812f293f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812f293f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812f294000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88812f294080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88812f294100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs error (device loop2): ext4_readdir:263: inode #2: block 3: comm syz.2.17: path /0/file0: bad entry in directory: rec_len is smaller than minimal - offset=1023, inode=255, rec_len=0, size=1024 fake=0