Extracting prog: 2m32.427212984s Minimizing prog: 22m12.213999038s Simplifying prog options: 0s Extracting C: 1m22.418417791s Simplifying C: 20m22.767239386s 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:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program crashed: possible deadlock in kernfs_iop_getattr single: successfully extracted reproducer found reproducer with 8 syscalls minimizing guilty program testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE detailed listing: executing program 0: syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r1 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r2 = openat$cgroup_ro(r0, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f00000002c0)={r2, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r2 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) ioctl$LOOP_CONFIGURE(r2, 0x4c0a, &(0x7f00000002c0)={0xffffffffffffffff, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(0xffffffffffffffff, 0x4c0a, &(0x7f00000002c0)={r3, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r3 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r2, 0x4c0a, &(0x7f00000002c0)={r3, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, 0xffffffffffffffff) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r2 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r3 = openat$cgroup_ro(0xffffffffffffffff, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r2, 0x4c0a, &(0x7f00000002c0)={r3, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: chdir(&(0x7f0000000480)='./cgroup\x00') r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r2 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r3 = openat$cgroup_ro(r0, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r2, 0x4c0a, &(0x7f00000002c0)={r3, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(0xffffffffffffffff, 0x4c06, r1) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(0x0, 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, 0x0, 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(0x0, 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, 0x0, 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash testing program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, 0x0) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program did not crash extracting C reproducer testing compiled C program (duration=55.785007329s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr simplifying C reproducer testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program did not crash testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {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: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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {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:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program did not crash testing compiled C program (duration=55.785007329s, {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: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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program did not crash testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=55.785007329s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-chdir-openat-openat$cgroup_ro-syz_open_dev$loop-openat$cgroup_ro-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) chdir(&(0x7f0000000480)='./cgroup\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000280)='.\x00', 0x0, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) r3 = syz_open_dev$loop(&(0x7f0000000100), 0xd79, 0x0) r4 = openat$cgroup_ro(r1, &(0x7f0000000140)='cgroup.stat\x00', 0x275a, 0x0) ioctl$LOOP_CONFIGURE(r3, 0x4c0a, &(0x7f00000002c0)={r4, 0x0, {0x2a00, 0x80010000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x13, 0x1c, "fee8a2ab78fcffffffffffffff2000b8785d960000000000000000000000000f00000000000100000000000000000000000000000200", "2809e897bdb2128bfc82525edd665240f45f819e01982861ac0000000000000000001100", "90be8b1c551265406c7f306003d8a0f4bd00", [0x20]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r2) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true reproducing took 49m50.00197144s repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/6001 is trying to acquire lock: ffff888140450a20 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#26){++++}-{0:0}: blk_alloc_queue+0x52f/0x610 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4415 [inline] __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4462 loop_add+0x482/0xb40 drivers/block/loop.c:2050 loop_init+0xd9/0x170 drivers/block/loop.c:2289 do_one_initcall+0x250/0x840 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x2a6/0x3d0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4331 [inline] fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4345 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4904 [inline] slab_alloc_node mm/slub.c:5239 [inline] kmem_cache_alloc_noprof+0x45/0x6e0 mm/slub.c:5270 __kernfs_iattrs+0xdf/0x340 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:61 [inline] __kernfs_setattr fs/kernfs/inode.c:74 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:128 notify_change+0xc1a/0xf40 fs/attr.c:546 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4244 [inline] do_open fs/namei.c:4641 [inline] path_openat+0x360c/0x3e20 fs/namei.c:4796 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&root->kernfs_iattr_rwsem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:464 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:517 loop_change_fd drivers/block/loop.c:597 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1546 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:792 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &root->kernfs_iattr_rwsem --> fs_reclaim --> &q->q_usage_counter(io)#26 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#26); lock(fs_reclaim); lock(&q->q_usage_counter(io)#26); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/6001: #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:562 [inline] #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x14c7/0x1fb0 drivers/block/loop.c:1546 #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 stack backtrace: CPU: 1 UID: 0 PID: 6001 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:464 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:517 loop_change_fd drivers/block/loop.c:597 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1546 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:792 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fac2239aeb9 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:00007fff2df96ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fac22615fa0 RCX: 00007fac2239aeb9 RDX: 0000000000000005 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007fac22408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fac22615fac R14: 00007fac22615fa0 R15: 00007fac22615fa0 final repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/6001 is trying to acquire lock: ffff888140450a20 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#26){++++}-{0:0}: blk_alloc_queue+0x52f/0x610 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4415 [inline] __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4462 loop_add+0x482/0xb40 drivers/block/loop.c:2050 loop_init+0xd9/0x170 drivers/block/loop.c:2289 do_one_initcall+0x250/0x840 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x2a6/0x3d0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4331 [inline] fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4345 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4904 [inline] slab_alloc_node mm/slub.c:5239 [inline] kmem_cache_alloc_noprof+0x45/0x6e0 mm/slub.c:5270 __kernfs_iattrs+0xdf/0x340 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:61 [inline] __kernfs_setattr fs/kernfs/inode.c:74 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:128 notify_change+0xc1a/0xf40 fs/attr.c:546 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4244 [inline] do_open fs/namei.c:4641 [inline] path_openat+0x360c/0x3e20 fs/namei.c:4796 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&root->kernfs_iattr_rwsem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:464 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:517 loop_change_fd drivers/block/loop.c:597 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1546 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:792 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &root->kernfs_iattr_rwsem --> fs_reclaim --> &q->q_usage_counter(io)#26 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#26); lock(fs_reclaim); lock(&q->q_usage_counter(io)#26); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/6001: #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:562 [inline] #0: ffff888024cb7448 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x14c7/0x1fb0 drivers/block/loop.c:1546 #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] #1: ffff888024ba4ca0 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:954 [inline] #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:595 [inline] #2: ffff888024ba4cd8 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1546 stack backtrace: CPU: 1 UID: 0 PID: 6001 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:464 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:517 loop_change_fd drivers/block/loop.c:597 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1546 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:792 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fac2239aeb9 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:00007fff2df96ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fac22615fa0 RCX: 00007fac2239aeb9 RDX: 0000000000000005 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007fac22408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fac22615fac R14: 00007fac22615fa0 R15: 00007fac22615fa0