Extracting prog: 2m11.532417546s
Minimizing prog: 4m19.230030375s
Simplifying prog options: 0s
Extracting C: 58.58384568s
Simplifying C: 12m13.169235076s


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
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=36.506282455s, {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=36.506282455s, {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=36.506282455s, {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=36.506282455s, {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=36.506282455s, {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=36.506282455s, {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$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
simplifying C reproducer
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {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$ext4-openat-lseek-getdents64
program did not crash
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true 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$ext4-openat-lseek-getdents64
program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
a never seen crash title: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry, ignore
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: 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=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false 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$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true 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$ext4-openat-lseek-getdents64
program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
a never seen crash title: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry, ignore
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true 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$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry
a never seen crash title: KASAN: slab-out-of-bounds Read in __ext4_check_dir_entry, ignore
testing compiled C program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4-openat-lseek-getdents64
program crashed: KASAN: use-after-free Read in __ext4_check_dir_entry
testing program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false 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)="$eJzs3EtvVFUcAPD/nXaKFUoLPnkoo0hsRFtaUFmYGI0mbExMdKHLWipBChioiRAiaAwujZ9AXZr4CVzpxqgrjVvdGxNi2IguzJj7KlM6rdPpTKcyv18y7Tn3dc7/nnt6H+dOA+hbtfRHErEtIn6JiNE8u3SBWv7rxvVLs39dvzSbRL3+yh9Jttyf1y/NlotuK35vLbY5XomofJjEniblnr9w8dTM/PzcuSI/uXD67cnzFy4+cfL0zIm5E3Nnpo8ePXJ46umnpp/sSJwjaV13v3d2765jr3/y0mw93vj+y7T+A8X8xjhyY+susxa1GI56vbJk6lD288C6t765jDSkk8EeVoQ1SY//tLmqWf8fjYG42Xij8eIHPa0c0FX1er2+Y9nU/KxYOZBk84HblT4O/ao846f3v+VnY69Aeuvac/kNUBr3jeKTzxmM9L49Gcvv2Ae6VP62iHjtyt+fpp9o+hwCAKCzvk6vfx5vdv1XiXsblttejA2NRcTBiNgZEXdFxN0RcU9Etux9EXH/Gsuv3ZLPy682TPlpuN3YWpFe/z1TjG0tvf5bHLUZGyhyI1n81eTNk/Nzh4p9Mh7VLWl+apUyvnnh54+zRJNIag3Xf+knLb+8Fizq8fvglqXrHJ9ZmFlv3KVr70fsHny2SfzJ4khAEhG7ImJ3G9tP99nJx77Ym6a3b10+/7/jX0UHxpnqn0c8mrf/lbgl/lKSl7TS+OTkHTE/d2iyPCqW++HHqy835huP7loWRpvxd0Da/nc2Pf6L+MtuUI7Xnl97GVd//WjFe5p2j/+h5NUsPVRMe3dmYeHcVMRQMWHJ9Omb65b5cvk0/vH9zfv/zoh/PivW2xMR6UH8QEQ8GBH7iro/FBEPR8T+VeL/7vlH3lp9D/W2/Y+v1v4RY0kRf+rc4sB964mBU99+tVL5rbX/kSw1Xkxp5e9fqxVsd78BAADA/0klG4NOKhOL6UplYiJ/h7987HKwFu+cOZ6PVY9FtVI+6RpteB46VTwbLvPTt+QPR8SO7E2j4Sw/MXt2fqTHsUO/27pC/0/91q2XXoDNY03jaEn36gFsPN/XhP7VvP939b0rYJNw/of+pf9D/2rW/y9H3OhBVYAN5vwP/av1/u+NALjdOP9D/9L/oS8t/0r8cPGvE9r5pv/NxM5j61p9rYnqBpbV4cRAl7Ycjf+0owuJqPR817WfqGyGauwrElsiotW1Lje0aXna7kYNq/M9/KMEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADQQf8GAAD//4F+194=")
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
testing program (duration=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false 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=36.506282455s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false 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
reproducing took 21m35.146236923s
repro crashed as (corrupted=false):
EXT4-fs warning (device loop2): dx_probe:860: inode #2: comm syz.2.18: dx entry: limit 65535 != root limit 120
EXT4-fs warning (device loop2): dx_probe:946: inode #2: comm syz.2.18: Corrupt directory, running e2fsck is recommended
==================================================================
BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
Read of size 2 at addr ffff888110db7003 by task syz.2.18/397

CPU: 0 PID: 397 Comm: syz.2.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report_generic.c:307
 __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
 ext4_readdir+0x123f/0x3ab0 fs/ext4/dir.c:261
 iterate_dir+0x260/0x570 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
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f8057b80eb9
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:00007ffd1afb8708 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8057dfbfa0 RCX: 00007f8057b80eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f8057beec1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8057dfbfac R14: 00007f8057dfbfa0 R15: 00007f8057dfbfa0

Allocated by task 105:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x605/0xb50 net/netlink/af_netlink.c:1889
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430
 __sys_sendmsg net/socket.c:2459 [inline]
 __do_sys_sendmsg net/socket.c:2468 [inline]
 __se_sys_sendmsg net/socket.c:2466 [inline]
 __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff888110db7000
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 3 bytes inside of
 248-byte region [ffff888110db7000, ffff888110db70f8)
The buggy address belongs to the page:
page:ffffea0004436dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888110db7140 pfn:0x110db7
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea00043c9400 0000000200000002 ffff888107d92180
raw: ffff888110db7140 00000000800c0000 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 105, ts 4591616762, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5370
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x605/0xb50 net/netlink/af_netlink.c:1889
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430
 __sys_sendmsg net/socket.c:2459 [inline]
 __do_sys_sendmsg net/socket.c:2468 [inline]
 __se_sys_sendmsg net/socket.c:2466 [inline]
 __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888110db6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888110db6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888110db7000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888110db7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
 ffff888110db7100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs error (device loop2): ext4_readdir:263: inode #2: block 3: comm syz.2.18: path /1/file0: bad entry in directory: directory entry overrun - offset=1023, inode=3468742911, rec_len=33036, size=1024 fake=0

final repro crashed as (corrupted=false):
EXT4-fs warning (device loop2): dx_probe:860: inode #2: comm syz.2.18: dx entry: limit 65535 != root limit 120
EXT4-fs warning (device loop2): dx_probe:946: inode #2: comm syz.2.18: Corrupt directory, running e2fsck is recommended
==================================================================
BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
Read of size 2 at addr ffff888110db7003 by task syz.2.18/397

CPU: 0 PID: 397 Comm: syz.2.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report_generic.c:307
 __ext4_check_dir_entry+0x7c2/0x970 fs/ext4/dir.c:85
 ext4_readdir+0x123f/0x3ab0 fs/ext4/dir.c:261
 iterate_dir+0x260/0x570 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
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f8057b80eb9
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:00007ffd1afb8708 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8057dfbfa0 RCX: 00007f8057b80eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f8057beec1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8057dfbfac R14: 00007f8057dfbfa0 R15: 00007f8057dfbfa0

Allocated by task 105:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x605/0xb50 net/netlink/af_netlink.c:1889
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430
 __sys_sendmsg net/socket.c:2459 [inline]
 __do_sys_sendmsg net/socket.c:2468 [inline]
 __se_sys_sendmsg net/socket.c:2466 [inline]
 __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff888110db7000
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 3 bytes inside of
 248-byte region [ffff888110db7000, ffff888110db70f8)
The buggy address belongs to the page:
page:ffffea0004436dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888110db7140 pfn:0x110db7
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea00043c9400 0000000200000002 ffff888107d92180
raw: ffff888110db7140 00000000800c0000 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 105, ts 4591616762, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5370
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 alloc_skb include/linux/skbuff.h:1126 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1178 [inline]
 netlink_sendmsg+0x605/0xb50 net/netlink/af_netlink.c:1889
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430
 __sys_sendmsg net/socket.c:2459 [inline]
 __do_sys_sendmsg net/socket.c:2468 [inline]
 __se_sys_sendmsg net/socket.c:2466 [inline]
 __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888110db6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888110db6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888110db7000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888110db7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
 ffff888110db7100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs error (device loop2): ext4_readdir:263: inode #2: block 3: comm syz.2.18: path /1/file0: bad entry in directory: directory entry overrun - offset=1023, inode=3468742911, rec_len=33036, size=1024 fake=0