Extracting prog: 3m23.386037242s Minimizing prog: 13m8.243242318s Simplifying prog options: 0s Extracting C: 35.060632027s Simplifying C: 12m16.100830456s 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:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr program crashed: possible deadlock in kernfs_iop_getattr single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={0xffffffffffffffff, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, 0xffffffffffffffff) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(0xffffffffffffffff, 0x4c0a, &(0x7f0000000380)={r0, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(0xffffffffffffffff, 0x4c06, r0) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(0x0, 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, 0x0, 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, 0x0) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash program did not crash extracting C reproducer testing compiled C program (duration=45.384722295s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr simplifying C reproducer testing compiled C program (duration=45.384722295s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {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:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {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:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.384722295s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing program (duration=45.384722295s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=45.384722295s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=45.384722295s, {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:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = syz_open_dev$loop(&(0x7f0000000240), 0x7, 0x180862) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/fscaps', 0x40000, 0x2d) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000380)={r1, 0x0, {0x0, 0x0, 0x0, 0x4, 0x4000000000000ffd, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3ff03e37d581270bad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "3209cc26f7061a74df34400700080000234b30c50997d3bed109ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa58dc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x400000000007]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true reproducing took 33m4.838059621s repro crashed as (corrupted=false): loop7: unable to read partition table loop7: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop7 (Cj̖P=}Xp %`ր{֐ȵ4FLQk݊) failed (rc=-5) ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc6-next-20250718-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.16/6077 is trying to acquire lock: ffff88801b6ffa20 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#25){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 blk_alloc_queue+0x538/0x620 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4400 [inline] __blk_mq_alloc_disk+0x15c/0x340 block/blk-mq.c:4447 loop_add+0x411/0xad0 drivers/block/loop.c:2034 loop_init+0x173/0x230 drivers/block/loop.c:2269 do_one_initcall+0x233/0x820 init/main.c:1269 do_initcall_level+0x137/0x1f0 init/main.c:1331 do_initcalls+0x69/0xd0 init/main.c:1347 kernel_init_freeable+0x3d9/0x590 init/main.c:1579 kernel_init+0x1d/0x1d0 init/main.c:1469 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __fs_reclaim_acquire mm/page_alloc.c:4234 [inline] fs_reclaim_acquire+0x72/0x100 mm/page_alloc.c:4248 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4131 [inline] slab_alloc_node mm/slub.c:4209 [inline] kmem_cache_alloc_noprof+0x44/0x3c0 mm/slub.c:4236 __kernfs_iattrs+0xd9/0x320 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+0xb36/0xe40 fs/attr.c:552 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3508 [inline] do_open fs/namei.c:3891 [inline] path_openat+0x306c/0x3830 fs/namei.c:4046 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1539 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2de/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:455 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:508 loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1860/0x1d00 drivers/block/loop.c:1534 blkdev_ioctl+0x5a5/0x6d0 block/ioctl.c:710 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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)#25 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#25); lock(fs_reclaim); lock(&q->q_usage_counter(io)#25); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.16/6077: #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:551 [inline] #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0xfbf/0x1d00 drivers/block/loop.c:1534 #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 stack backtrace: CPU: 0 UID: 0 PID: 6077 Comm: syz.0.16 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1539 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2de/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:455 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:508 loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1860/0x1d00 drivers/block/loop.c:1534 blkdev_ioctl+0x5a5/0x6d0 block/ioctl.c:710 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f846318e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2ebda2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f84633b5fa0 RCX: 00007f846318e9a9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f8463210d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f84633b5fa0 R14: 00007f84633b5fa0 R15: 0000000000000003 ldm_validate_partition_table(): Disk read failed. Dev loop7: unable to read RDB block 0 loop7: unable to read partition table loop7: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop7 (Cj̖P=}Xp %`ր{֐ȵ4FLQk݊) failed (rc=-5) final repro crashed as (corrupted=false): loop7: unable to read partition table loop7: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop7 (Cj̖P=}Xp %`ր{֐ȵ4FLQk݊) failed (rc=-5) ====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc6-next-20250718-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.16/6077 is trying to acquire lock: ffff88801b6ffa20 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#25){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 blk_alloc_queue+0x538/0x620 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4400 [inline] __blk_mq_alloc_disk+0x15c/0x340 block/blk-mq.c:4447 loop_add+0x411/0xad0 drivers/block/loop.c:2034 loop_init+0x173/0x230 drivers/block/loop.c:2269 do_one_initcall+0x233/0x820 init/main.c:1269 do_initcall_level+0x137/0x1f0 init/main.c:1331 do_initcalls+0x69/0xd0 init/main.c:1347 kernel_init_freeable+0x3d9/0x590 init/main.c:1579 kernel_init+0x1d/0x1d0 init/main.c:1469 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __fs_reclaim_acquire mm/page_alloc.c:4234 [inline] fs_reclaim_acquire+0x72/0x100 mm/page_alloc.c:4248 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4131 [inline] slab_alloc_node mm/slub.c:4209 [inline] kmem_cache_alloc_noprof+0x44/0x3c0 mm/slub.c:4236 __kernfs_iattrs+0xd9/0x320 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+0xb36/0xe40 fs/attr.c:552 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3508 [inline] do_open fs/namei.c:3891 [inline] path_openat+0x306c/0x3830 fs/namei.c:4046 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1539 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2de/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:455 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:508 loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1860/0x1d00 drivers/block/loop.c:1534 blkdev_ioctl+0x5a5/0x6d0 block/ioctl.c:710 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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)#25 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#25); lock(fs_reclaim); lock(&q->q_usage_counter(io)#25); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.16/6077: #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:551 [inline] #0: ffff888025122400 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0xfbf/0x1d00 drivers/block/loop.c:1534 #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] #1: ffff888141f61e18 (&q->q_usage_counter(io)#25){++++}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:934 [inline] #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:584 [inline] #2: ffff888141f61e50 (&q->q_usage_counter(queue)#21){+.+.}-{0:0}, at: lo_ioctl+0x17f2/0x1d00 drivers/block/loop.c:1534 stack backtrace: CPU: 0 UID: 0 PID: 6077 Comm: syz.0.16 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1539 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2de/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:455 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:508 loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1860/0x1d00 drivers/block/loop.c:1534 blkdev_ioctl+0x5a5/0x6d0 block/ioctl.c:710 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f846318e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2ebda2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f84633b5fa0 RCX: 00007f846318e9a9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f8463210d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f84633b5fa0 R14: 00007f84633b5fa0 R15: 0000000000000003 ldm_validate_partition_table(): Disk read failed. Dev loop7: unable to read RDB block 0 loop7: unable to read partition table loop7: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop7 (Cj̖P=}Xp %`ր{֐ȵ4FLQk݊) failed (rc=-5)