Extracting prog: 1m25.254903292s Minimizing prog: 5m15.760206445s Simplifying prog options: 0s Extracting C: 24.576675837s Simplifying C: 3m48.198402827s 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 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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$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=36.006821479s, {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 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, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) program did not crash testing program (duration=36.006821479s, {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 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, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=36.006821479s, {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 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, 0x142ba3) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={0xffffffffffffffff, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, 0xffffffffffffffff) program did not crash testing program (duration=36.006821479s, {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 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, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(0xffffffffffffffff, 0x4c0a, &(0x7f0000000080)={r0, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(0xffffffffffffffff, 0x4c06, r0) program did not crash testing program (duration=36.006821479s, {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 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$loop(0x0, 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=36.006821479s, {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 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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, 0x0, 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program did not crash testing program (duration=36.006821479s, {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 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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) 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=36.006821479s, {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 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=36.006821479s, {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 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=36.006821479s, {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=36.006821479s, {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=36.006821479s, {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=36.006821479s, {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=36.006821479s, {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=36.006821479s, {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=36.006821479s, {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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=36.006821479s, {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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=36.006821479s, {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$loop(&(0x7f0000000240), 0x7, 0x142ba3) r1 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000001c0)='/sys/kernel/oops_count', 0x8a883, 0x2) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000000080)={r1, 0x0, {0x0, 0x0, 0x0, 0x4000000000007, 0x4000000000000ffc, 0x0, 0x0, 0x1e, 0xc, "faf98317e5a1149989fc8dbe43ea6acc96e3a2503dc3bd3fe37d58128bbad0099cebdc25f5ab60c9e6d680f985881a7beda9d69098c8b534464c516bdd8a0f35", "32d8cc26f7061a74df2cfc06c89f3d9e234b30c50997d3bef409ff2176ff7bfe55cd4a5d83cd4a524bd3ffe70c7f3f800b2f7b6aa54cc50a1fcaed1e831fa79a", "67523760fd40f78d2cfc03d81a8ca55ba139c01802c4dae4162e43ac61b7ad33", [0x2, 0x9]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, r1) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true reproducing took 12m57.563512059s repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/5927 is trying to acquire lock: ffff88801d28e210 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 but task is already holding lock: ffff88802829d430 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 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}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 blk_alloc_queue+0x610/0x790 block/blk-core.c:504 blk_mq_alloc_queue+0x174/0x290 block/blk-mq.c:4420 __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4467 loop_add+0x498/0xb60 drivers/block/loop.c:2045 loop_init+0x1d3/0x200 drivers/block/loop.c:2284 do_one_initcall+0x11d/0x700 init/main.c:1347 do_initcall_level init/main.c:1409 [inline] do_initcalls init/main.c:1425 [inline] do_basic_setup init/main.c:1445 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 kernel_init+0x1f/0x1e0 init/main.c:1548 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __fs_reclaim_acquire mm/page_alloc.c:4329 [inline] fs_reclaim_acquire+0xc4/0x100 mm/page_alloc.c:4343 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4565 [inline] slab_alloc_node mm/slub.c:4925 [inline] kmem_cache_alloc_noprof+0x63/0x6a0 mm/slub.c:4959 __kernfs_iattrs+0x126/0x450 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x130 fs/kernfs/inode.c:127 notify_change+0xb25/0x1330 fs/attr.c:556 do_truncate+0x1df/0x240 fs/open.c:68 handle_truncate fs/namei.c:4305 [inline] do_open fs/namei.c:4704 [inline] path_openat+0x370f/0x4280 fs/namei.c:4859 do_file_open+0x20e/0x430 fs/namei.c:4888 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&root->kernfs_iattr_rwsem){++++}-{4:4}: check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2d4/0x430 fs/stat.c:213 vfs_getattr+0x4a/0x60 fs/stat.c:262 loop_query_min_dio_size.isra.0+0x117/0x250 drivers/block/loop.c:459 loop_assign_backing_file drivers/block/loop.c:512 [inline] loop_change_fd drivers/block/loop.c:592 [inline] lo_ioctl+0x13aa/0x1bc0 drivers/block/loop.c:1541 blkdev_ioctl+0x5ad/0x6f0 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 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.0.17/5927: #0: ffff888026368430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable+0x30/0xb0 drivers/block/loop.c:118 #1: ffff88802829d430 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 #2: ffff88802829d468 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 stack backtrace: CPU: 1 UID: 0 PID: 5927 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2d4/0x430 fs/stat.c:213 vfs_getattr+0x4a/0x60 fs/stat.c:262 loop_query_min_dio_size.isra.0+0x117/0x250 drivers/block/loop.c:459 loop_assign_backing_file drivers/block/loop.c:512 [inline] loop_change_fd drivers/block/loop.c:592 [inline] lo_ioctl+0x13aa/0x1bc0 drivers/block/loop.c:1541 blkdev_ioctl+0x5ad/0x6f0 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcf2679ce59 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:00007ffd1c787ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcf26a15fa0 RCX: 00007fcf2679ce59 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007fcf26832e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcf26a15fac R14: 00007fcf26a15fa0 R15: 00007fcf26a15fa0 final repro crashed as (corrupted=false): ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/5927 is trying to acquire lock: ffff88801d28e210 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 but task is already holding lock: ffff88802829d430 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 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}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 blk_alloc_queue+0x610/0x790 block/blk-core.c:504 blk_mq_alloc_queue+0x174/0x290 block/blk-mq.c:4420 __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4467 loop_add+0x498/0xb60 drivers/block/loop.c:2045 loop_init+0x1d3/0x200 drivers/block/loop.c:2284 do_one_initcall+0x11d/0x700 init/main.c:1347 do_initcall_level init/main.c:1409 [inline] do_initcalls init/main.c:1425 [inline] do_basic_setup init/main.c:1445 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 kernel_init+0x1f/0x1e0 init/main.c:1548 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __fs_reclaim_acquire mm/page_alloc.c:4329 [inline] fs_reclaim_acquire+0xc4/0x100 mm/page_alloc.c:4343 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4565 [inline] slab_alloc_node mm/slub.c:4925 [inline] kmem_cache_alloc_noprof+0x63/0x6a0 mm/slub.c:4959 __kernfs_iattrs+0x126/0x450 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x130 fs/kernfs/inode.c:127 notify_change+0xb25/0x1330 fs/attr.c:556 do_truncate+0x1df/0x240 fs/open.c:68 handle_truncate fs/namei.c:4305 [inline] do_open fs/namei.c:4704 [inline] path_openat+0x370f/0x4280 fs/namei.c:4859 do_file_open+0x20e/0x430 fs/namei.c:4888 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&root->kernfs_iattr_rwsem){++++}-{4:4}: check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2d4/0x430 fs/stat.c:213 vfs_getattr+0x4a/0x60 fs/stat.c:262 loop_query_min_dio_size.isra.0+0x117/0x250 drivers/block/loop.c:459 loop_assign_backing_file drivers/block/loop.c:512 [inline] loop_change_fd drivers/block/loop.c:592 [inline] lo_ioctl+0x13aa/0x1bc0 drivers/block/loop.c:1541 blkdev_ioctl+0x5ad/0x6f0 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 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.0.17/5927: #0: ffff888026368430 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable+0x30/0xb0 drivers/block/loop.c:118 #1: ffff88802829d430 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 #2: ffff88802829d468 (&q->q_usage_counter(queue)#8){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206 stack backtrace: CPU: 1 UID: 0 PID: 5927 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:192 vfs_getattr_nosec+0x2d4/0x430 fs/stat.c:213 vfs_getattr+0x4a/0x60 fs/stat.c:262 loop_query_min_dio_size.isra.0+0x117/0x250 drivers/block/loop.c:459 loop_assign_backing_file drivers/block/loop.c:512 [inline] loop_change_fd drivers/block/loop.c:592 [inline] lo_ioctl+0x13aa/0x1bc0 drivers/block/loop.c:1541 blkdev_ioctl+0x5ad/0x6f0 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcf2679ce59 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:00007ffd1c787ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcf26a15fa0 RCX: 00007fcf2679ce59 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007fcf26832e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcf26a15fac R14: 00007fcf26a15fa0 R15: 00007fcf26a15fa0