Extracting prog: 2m18.596144609s Minimizing prog: 9m13.945273554s Simplifying prog options: 0s Extracting C: 1m11.376445259s Simplifying C: 7m7.798502166s 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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program crashed: possible deadlock in kernfs_iop_getattr single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) program did not crash testing program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program did not crash testing program (duration=54.752339362s, {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, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) ioctl$LOOP_CONFIGURE(0xffffffffffffffff, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(0xffffffffffffffff, 0x4c06, r0) program did not crash testing program (duration=54.752339362s, {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(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r0, 0x4c0a, &(0x7f0000001600)={0xffffffffffffffff, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r0, 0x4c06, 0xffffffffffffffff) program did not crash testing program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, 0x0, 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program did not crash testing program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(0x0, 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program did not crash testing program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, 0x0) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program did not crash extracting C reproducer testing compiled C program (duration=54.752339362s, {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$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr simplifying C reproducer testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing compiled C program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD program crashed: possible deadlock in kernfs_iop_getattr testing program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true testing program (duration=54.752339362s, {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}}): openat$sysfs-syz_open_dev$loop-ioctl$LOOP_CONFIGURE-ioctl$LOOP_CHANGE_FD detailed listing: executing program 0: r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000002c0)='/sys/power/pm_wakeup_irq', 0x0, 0x1a0) r1 = syz_open_dev$loop(&(0x7f0000000440), 0x81, 0x0) ioctl$LOOP_CONFIGURE(r1, 0x4c0a, &(0x7f0000001600)={r0, 0x800, {0x2a00, 0x80010000, 0x0, 0x5, 0x0, 0x0, 0x0, 0x20, 0x1c, "fee8a2ab78fc179fd1f8a0e91ddaaca7bd6447a4b4e00d9683dda1af1ea09de2b7fb0a0100000000000000000300", "2809e8dbe108598927875397bab22d0000b420a9c81f40f05f819e01177d3d458dac00000000000000000000003b00000000000000000200", "90be8b1c5512406c7f00", [0x4, 0x40000000000000]}}) ioctl$LOOP_CHANGE_FD(r1, 0x4c06, r0) program crashed: possible deadlock in kernfs_iop_getattr validation run: crashed=true reproducing took 23m11.847303951s repro crashed as (corrupted=false): loop9: unable to read partition table loop9: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop9 (被xڬdGݡ ) failed (rc=-5) ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/6000 is trying to acquire lock: ffff888140460220 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#26){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 blk_alloc_queue+0x538/0x620 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4399 [inline] __blk_mq_alloc_disk+0x15c/0x340 block/blk-mq.c:4446 loop_add+0x411/0xad0 drivers/block/loop.c:2047 loop_init+0xd9/0x170 drivers/block/loop.c:2282 do_one_initcall+0x25a/0x860 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x334/0x4b0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x4bc/0x870 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+0x120/0x360 kernel/locking/lockdep.c:5868 __fs_reclaim_acquire mm/page_alloc.c:4305 [inline] fs_reclaim_acquire+0x72/0x100 mm/page_alloc.c:4319 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4929 [inline] slab_alloc_node mm/slub.c:5264 [inline] kmem_cache_alloc_noprof+0x45/0x700 mm/slub.c:5295 __kernfs_iattrs+0xd9/0x320 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:61 [inline] __kernfs_setattr fs/kernfs/inode.c:74 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:128 notify_change+0xc1a/0xf40 fs/attr.c:546 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x306c/0x3830 fs/namei.c:4134 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 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+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:465 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:518 loop_change_fd drivers/block/loop.c:598 [inline] lo_ioctl+0x167f/0x1c50 drivers/block/loop.c:1547 blkdev_ioctl+0x60e/0x710 block/ioctl.c:706 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &root->kernfs_iattr_rwsem --> fs_reclaim --> &q->q_usage_counter(io)#26 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#26); lock(fs_reclaim); lock(&q->q_usage_counter(io)#26); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/6000: #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:563 [inline] #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x11e4/0x1c50 drivers/block/loop.c:1547 #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 stack backtrace: CPU: 1 UID: 0 PID: 6000 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:465 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:518 loop_change_fd drivers/block/loop.c:598 [inline] lo_ioctl+0x167f/0x1c50 drivers/block/loop.c:1547 blkdev_ioctl+0x60e/0x710 block/ioctl.c:706 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcce058efc9 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:00007ffc7c17af78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcce07e5fa0 RCX: 00007fcce058efc9 RDX: 0000000000000003 RSI: 0000000000004c06 RDI: 0000000000000004 RBP: 00007fcce0611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcce07e5fa0 R14: 00007fcce07e5fa0 R15: 0000000000000003 ldm_validate_partition_table(): Disk read failed. Dev loop9: unable to read RDB block 0 loop9: unable to read partition table loop9: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop9 (被xڬdGݡ ) failed (rc=-5) final repro crashed as (corrupted=false): loop9: unable to read partition table loop9: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop9 (被xڬdGݡ ) failed (rc=-5) ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.17/6000 is trying to acquire lock: ffff888140460220 (&root->kernfs_iattr_rwsem){++++}-{4:4}, at: kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 but task is already holding lock: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&q->q_usage_counter(io)#26){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 blk_alloc_queue+0x538/0x620 block/blk-core.c:461 blk_mq_alloc_queue block/blk-mq.c:4399 [inline] __blk_mq_alloc_disk+0x15c/0x340 block/blk-mq.c:4446 loop_add+0x411/0xad0 drivers/block/loop.c:2047 loop_init+0xd9/0x170 drivers/block/loop.c:2282 do_one_initcall+0x25a/0x860 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x334/0x4b0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x4bc/0x870 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+0x120/0x360 kernel/locking/lockdep.c:5868 __fs_reclaim_acquire mm/page_alloc.c:4305 [inline] fs_reclaim_acquire+0x72/0x100 mm/page_alloc.c:4319 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4929 [inline] slab_alloc_node mm/slub.c:5264 [inline] kmem_cache_alloc_noprof+0x45/0x700 mm/slub.c:5295 __kernfs_iattrs+0xd9/0x320 fs/kernfs/inode.c:36 kernfs_iattrs fs/kernfs/inode.c:61 [inline] __kernfs_setattr fs/kernfs/inode.c:74 [inline] kernfs_iop_setattr+0xea/0x3f0 fs/kernfs/inode.c:128 notify_change+0xc1a/0xf40 fs/attr.c:546 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3596 [inline] do_open fs/namei.c:3979 [inline] path_openat+0x306c/0x3830 fs/namei.c:4134 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 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+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:465 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:518 loop_change_fd drivers/block/loop.c:598 [inline] lo_ioctl+0x167f/0x1c50 drivers/block/loop.c:1547 blkdev_ioctl+0x60e/0x710 block/ioctl.c:706 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &root->kernfs_iattr_rwsem --> fs_reclaim --> &q->q_usage_counter(io)#26 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&q->q_usage_counter(io)#26); lock(fs_reclaim); lock(&q->q_usage_counter(io)#26); rlock(&root->kernfs_iattr_rwsem); *** DEADLOCK *** 3 locks held by syz.0.17/6000: #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_global_lock_killable drivers/block/loop.c:118 [inline] #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: loop_change_fd drivers/block/loop.c:563 [inline] #0: ffff888142326440 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_ioctl+0x11e4/0x1c50 drivers/block/loop.c:1547 #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] #1: ffff88802551f668 (&q->q_usage_counter(io)#26){++++}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: blk_mq_freeze_queue include/linux/blk-mq.h:938 [inline] #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: loop_change_fd drivers/block/loop.c:596 [inline] #2: ffff88802551f6a0 (&q->q_usage_counter(queue)#10){+.+.}-{0:0}, at: lo_ioctl+0x1604/0x1c50 drivers/block/loop.c:1547 stack backtrace: CPU: 1 UID: 0 PID: 6000 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537 kernfs_iop_getattr+0x9e/0x450 fs/kernfs/inode.c:193 vfs_getattr_nosec+0x2e1/0x430 fs/stat.c:213 loop_query_min_dio_size drivers/block/loop.c:465 [inline] loop_assign_backing_file+0x222/0x400 drivers/block/loop.c:518 loop_change_fd drivers/block/loop.c:598 [inline] lo_ioctl+0x167f/0x1c50 drivers/block/loop.c:1547 blkdev_ioctl+0x60e/0x710 block/ioctl.c:706 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+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcce058efc9 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:00007ffc7c17af78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcce07e5fa0 RCX: 00007fcce058efc9 RDX: 0000000000000003 RSI: 0000000000004c06 RDI: 0000000000000004 RBP: 00007fcce0611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcce07e5fa0 R14: 00007fcce07e5fa0 R15: 0000000000000003 ldm_validate_partition_table(): Disk read failed. Dev loop9: unable to read RDB block 0 loop9: unable to read partition table loop9: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop9 (被xڬdGݡ ) failed (rc=-5)