Extracting prog: 2m22.25257033s Minimizing prog: 9m18.747733809s Simplifying prog options: 0s Extracting C: 1m13.931601732s Simplifying C: 8m12.905614226s 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$loop-openat$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 single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=45.376154172s, {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$loop-openat$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=45.376154172s, {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$loop-openat$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=45.376154172s, {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$loop-ioctl$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=45.376154172s, {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}}): 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=45.376154172s, {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$loop-openat$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=45.376154172s, {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$loop-openat$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=45.376154172s, {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$loop-openat$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 extracting C reproducer testing compiled C program (duration=45.376154172s, {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$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr simplifying C reproducer testing compiled C program (duration=45.376154172s, {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$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.376154172s, {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$loop-openat$sysfs-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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=45.376154172s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_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=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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=45.376154172s, {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 CallComments:true 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 25m4.493406127s 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 syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/5860 is trying to acquire lock: ffff88801be8d210 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 but task is already holding lock: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#24){++++}-{0:0}: blk_alloc_queue+0x546/0x680 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4450 [inline] __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4497 loop_add+0x482/0xb40 drivers/block/loop.c:2049 loop_init+0xd9/0x170 drivers/block/loop.c:2288 do_one_initcall+0x250/0x870 init/main.c:1392 do_initcall_level+0x104/0x190 init/main.c:1454 do_initcalls+0x59/0xa0 init/main.c:1470 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703 kernel_init+0x1d/0x1d0 init/main.c:1593 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4325 [inline] fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4875 [inline] kmem_cache_alloc_noprof+0x40/0x650 mm/slub.c:4905 __kernfs_iattrs+0xdf/0x320 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:59 [inline] __kernfs_setattr fs/kernfs/inode.c:72 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:126 notify_change+0xc1a/0xf40 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4307 [inline] do_open fs/namei.c:4703 [inline] path_openat+0x2f89/0x3860 fs/namei.c:4858 do_file_open+0x23e/0x4a0 fs/namei.c:4887 do_sys_openat2+0x113/0x200 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/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+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:463 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:516 loop_change_fd drivers/block/loop.c:596 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1545 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797 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+0x15f/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)#24 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#24); lock(fs_reclaim); lock(&q->q_usage_counter(io)#24); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/5860: #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:561 [inline] #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x14c7/0x1fb0 drivers/block/loop.c:1545 #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 stack backtrace: CPU: 0 UID: 0 PID: 5860 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:463 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:516 loop_change_fd drivers/block/loop.c:596 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1545 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797 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+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9cea39cdd9 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:00007ffe22044218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9cea615fa0 RCX: 00007f9cea39cdd9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f9cea432d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9cea615fac R14: 00007f9cea615fa0 R15: 00007f9cea615fa0 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 syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/5860 is trying to acquire lock: ffff88801be8d210 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 but task is already holding lock: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#24){++++}-{0:0}: blk_alloc_queue+0x546/0x680 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4450 [inline] __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4497 loop_add+0x482/0xb40 drivers/block/loop.c:2049 loop_init+0xd9/0x170 drivers/block/loop.c:2288 do_one_initcall+0x250/0x870 init/main.c:1392 do_initcall_level+0x104/0x190 init/main.c:1454 do_initcalls+0x59/0xa0 init/main.c:1470 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703 kernel_init+0x1d/0x1d0 init/main.c:1593 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4325 [inline] fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4875 [inline] kmem_cache_alloc_noprof+0x40/0x650 mm/slub.c:4905 __kernfs_iattrs+0xdf/0x320 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:59 [inline] __kernfs_setattr fs/kernfs/inode.c:72 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:126 notify_change+0xc1a/0xf40 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 handle_truncate fs/namei.c:4307 [inline] do_open fs/namei.c:4703 [inline] path_openat+0x2f89/0x3860 fs/namei.c:4858 do_file_open+0x23e/0x4a0 fs/namei.c:4887 do_sys_openat2+0x113/0x200 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/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+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:463 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:516 loop_change_fd drivers/block/loop.c:596 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1545 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797 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+0x15f/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)#24 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#24); lock(fs_reclaim); lock(&q->q_usage_counter(io)#24); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/5860: #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:561 [inline] #0: ffff888026d0f430 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x14c7/0x1fb0 drivers/block/loop.c:1545 #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] #1: ffff8880269a7020 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline] #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:594 [inline] #2: ffff8880269a7058 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: lo_ioctl+0x1a51/0x1fb0 drivers/block/loop.c:1545 stack backtrace: CPU: 0 UID: 0 PID: 5860 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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+0x106/0x350 kernel/locking/lockdep.c:5868 down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:463 [inline] loop_assign_backing_file+0x27a/0x4b0 drivers/block/loop.c:516 loop_change_fd drivers/block/loop.c:596 [inline] lo_ioctl+0x1acb/0x1fb0 drivers/block/loop.c:1545 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797 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+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9cea39cdd9 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:00007ffe22044218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9cea615fa0 RCX: 00007f9cea39cdd9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f9cea432d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9cea615fac R14: 00007f9cea615fa0 R15: 00007f9cea615fa0 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)