Extracting prog: 25.690638549s Minimizing prog: 5m32.505591107s Simplifying prog options: 0s Extracting C: 20.381420078s Simplifying C: 3m54.188730066s extracting reproducer from 24 programs first checking the prog from the crash report 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 single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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 extracting C reproducer testing compiled C program (duration=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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=31.246709899s, {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 12m2.673573584s repro crashed as (corrupted=false): 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-syzkaller-00281-gf4a40a4282f4 #0 Not tainted ------------------------------------------------------ syz.0.16/6107 is trying to acquire lock: ffff88801ca8e220 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 but task is already holding lock: ffff8881067c4520 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&q->q_usage_counter(io)#24){++++}-{0:0}: blk_alloc_queue+0x619/0x760 block/blk-core.c:461 blk_mq_alloc_queue+0x175/0x290 block/blk-mq.c:4396 __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4443 loop_add+0x49e/0xb70 drivers/block/loop.c:2012 loop_init+0x164/0x270 drivers/block/loop.c:2247 do_one_initcall+0x120/0x6e0 init/main.c:1274 do_initcall_level init/main.c:1336 [inline] do_initcalls init/main.c:1352 [inline] do_basic_setup init/main.c:1371 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1584 kernel_init+0x1c/0x2b0 init/main.c:1474 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4045 [inline] fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:4059 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4099 [inline] slab_alloc_node mm/slub.c:4177 [inline] kmem_cache_alloc_noprof+0x53/0x3b0 mm/slub.c:4204 __kernfs_iattrs+0xbc/0x3f0 fs/kernfs/inode.c:37 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x120 fs/kernfs/inode.c:127 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4055 do_filp_open+0x20b/0x470 fs/namei.c:4082 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (iattr_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747 __kernfs_iattrs+0x2b/0x3f0 fs/kernfs/inode.c:32 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x120 fs/kernfs/inode.c:127 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4055 do_filp_open+0x20b/0x470 fs/namei.c:4082 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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 kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 vfs_getattr_nosec+0x2ac/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:455 loop_assign_backing_file drivers/block/loop.c:508 [inline] loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1d2e/0x2760 drivers/block/loop.c:1515 blkdev_ioctl+0x277/0x6d0 block/ioctl.c:704 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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.0.16/6107: #0: ffff888026e59400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable+0x30/0xb0 drivers/block/loop.c:118 #1: ffff8881067c4520 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 #2: ffff8881067c4558 (&q->q_usage_counter(queue)#20){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 stack backtrace: CPU: 3 UID: 0 PID: 6107 Comm: syz.0.16 Not tainted 6.16.0-rc6-syzkaller-00281-gf4a40a4282f4 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046 check_noncircular+0x14c/0x170 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 kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 vfs_getattr_nosec+0x2ac/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:455 loop_assign_backing_file drivers/block/loop.c:508 [inline] loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1d2e/0x2760 drivers/block/loop.c:1515 blkdev_ioctl+0x277/0x6d0 block/ioctl.c:704 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f953038e9a9 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:00007fff56faab48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f95305b5fa0 RCX: 00007f953038e9a9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f9530410d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f95305b5fa0 R14: 00007f95305b5fa0 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: 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-syzkaller-00281-gf4a40a4282f4 #0 Not tainted ------------------------------------------------------ syz.0.16/6107 is trying to acquire lock: ffff88801ca8e220 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 but task is already holding lock: ffff8881067c4520 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&q->q_usage_counter(io)#24){++++}-{0:0}: blk_alloc_queue+0x619/0x760 block/blk-core.c:461 blk_mq_alloc_queue+0x175/0x290 block/blk-mq.c:4396 __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4443 loop_add+0x49e/0xb70 drivers/block/loop.c:2012 loop_init+0x164/0x270 drivers/block/loop.c:2247 do_one_initcall+0x120/0x6e0 init/main.c:1274 do_initcall_level init/main.c:1336 [inline] do_initcalls init/main.c:1352 [inline] do_basic_setup init/main.c:1371 [inline] kernel_init_freeable+0x5c2/0x900 init/main.c:1584 kernel_init+0x1c/0x2b0 init/main.c:1474 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4045 [inline] fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:4059 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4099 [inline] slab_alloc_node mm/slub.c:4177 [inline] kmem_cache_alloc_noprof+0x53/0x3b0 mm/slub.c:4204 __kernfs_iattrs+0xbc/0x3f0 fs/kernfs/inode.c:37 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x120 fs/kernfs/inode.c:127 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4055 do_filp_open+0x20b/0x470 fs/namei.c:4082 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (iattr_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747 __kernfs_iattrs+0x2b/0x3f0 fs/kernfs/inode.c:32 kernfs_iattrs fs/kernfs/inode.c:60 [inline] __kernfs_setattr+0x4d/0x3c0 fs/kernfs/inode.c:73 kernfs_iop_setattr+0xda/0x120 fs/kernfs/inode.c:127 notify_change+0x6a9/0x1230 fs/attr.c:552 do_truncate+0x1d7/0x230 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x2678/0x2cb0 fs/namei.c:4055 do_filp_open+0x20b/0x470 fs/namei.c:4082 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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 kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 vfs_getattr_nosec+0x2ac/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:455 loop_assign_backing_file drivers/block/loop.c:508 [inline] loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1d2e/0x2760 drivers/block/loop.c:1515 blkdev_ioctl+0x277/0x6d0 block/ioctl.c:704 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 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.0.16/6107: #0: ffff888026e59400 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable+0x30/0xb0 drivers/block/loop.c:118 #1: ffff8881067c4520 (&q->q_usage_counter(io)#24){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 #2: ffff8881067c4558 (&q->q_usage_counter(queue)#20){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:205 stack backtrace: CPU: 3 UID: 0 PID: 6107 Comm: syz.0.16 Not tainted 6.16.0-rc6-syzkaller-00281-gf4a40a4282f4 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2046 check_noncircular+0x14c/0x170 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 kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 down_read+0x9b/0x480 kernel/locking/rwsem.c:1524 kernfs_iop_getattr+0x9c/0xf0 fs/kernfs/inode.c:191 vfs_getattr_nosec+0x2ac/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:455 loop_assign_backing_file drivers/block/loop.c:508 [inline] loop_change_fd drivers/block/loop.c:586 [inline] lo_ioctl+0x1d2e/0x2760 drivers/block/loop.c:1515 blkdev_ioctl+0x277/0x6d0 block/ioctl.c:704 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f953038e9a9 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:00007fff56faab48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f95305b5fa0 RCX: 00007f953038e9a9 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 RBP: 00007f9530410d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f95305b5fa0 R14: 00007f95305b5fa0 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)