Extracting prog: 4m31.765169982s Minimizing prog: 58m4.266989435s Simplifying prog options: 14m29.042076388s Extracting C: 5m13.994376862s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector single: successfully extracted reproducer found reproducer with 6 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(0xffffffffffffffff, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)) r1 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r1, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) (async) ioctl$NBD_SET_SOCK(r0, 0xab00, 0xffffffffffffffff) r1 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r1, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(0xffffffffffffffff, 0xab00, r0) r1 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(0xffffffffffffffff, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r1, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(0x0, 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, 0x0) ioctl$NBD_SET_SOCK(r0, 0xab00, 0xffffffffffffffff) r1 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r1, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(0x0, 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK program crashed: no output from test machine a never seen crash title: no output from test machine, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-syz_open_dev$ndb-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK detailed listing: executing program 0: r0 = syz_open_dev$ndb(&(0x7f0000006200), 0x0, 0x0) socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000006240)={0xffffffffffffffff}) ioctl$NBD_SET_SOCK(r0, 0xab00, r1) r2 = syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x0) ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x9) ioctl$NBD_CLEAR_SOCK(r2, 0xab03) program crashed: INFO: task hung in read_part_sector validation run: crashed=true reproducing took 1h31m52.386536164s repro crashed as (corrupted=false): INFO: task udevd:4326 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25264 pid: 4326 ppid: 3560 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 wait_on_page_bit_common+0x83b/0xe50 mm/filemap.c:1356 wait_on_page_bit mm/filemap.c:1417 [inline] wait_on_page_locked include/linux/pagemap.h:688 [inline] wait_on_page_read mm/filemap.c:3437 [inline] do_read_cache_page+0xb05/0x1030 mm/filemap.c:3480 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0xd4/0x4f0 block/partitions/core.c:726 adfspart_check_ICS+0xc3/0xe40 block/partitions/acorn.c:360 check_partition block/partitions/core.c:148 [inline] blk_add_partitions block/partitions/core.c:611 [inline] bdev_disk_changed+0x933/0x16c0 block/partitions/core.c:697 blkdev_get_whole+0x2f9/0x390 block/bdev.c:682 blkdev_get_by_dev+0x2d0/0xa60 block/bdev.c:827 blkdev_open+0x12d/0x2c0 block/fops.c:466 do_dentry_open+0x7ff/0xf80 fs/open.c:826 do_open fs/namei.c:3616 [inline] path_openat+0x26f5/0x2fa0 fs/namei.c:3750 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f37834bb407 RSP: 002b:00007ffcdbecdf40 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f37833cd880 RCX: 00007f37834bb407 RDX: 00000000000a0800 RSI: 00005580235eea50 RDI: ffffffffffffff9c RBP: 00005580235d5910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00005580235ede00 R13: 00005580235ed410 R14: 0000000000000000 R15: 00005580235ede00 INFO: task syz.0.17:4331 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26552 pid: 4331 ppid: 4315 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blkdev_put+0xf9/0x7d0 block/bdev.c:915 blkdev_close+0x76/0xa0 block/fops.c:478 __fput+0x234/0x930 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdb86e99e59 RSP: 002b:00007ffc72ed1da8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fdb87114da0 RCX: 00007fdb86e99e59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fdb87114da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fdb87114cb0 R11: 0000000000000246 R12: 0000000000027211 R13: 00007fdb87112fac R14: 0000000000026f2b R15: 00007ffc72ed1eb0 INFO: task syz.0.17:4332 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:27800 pid: 4332 ppid: 4315 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blkdev_put+0xf9/0x7d0 block/bdev.c:915 blkdev_close+0x76/0xa0 block/fops.c:478 __fput+0x234/0x930 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdb86e99e59 RSP: 002b:00007fdb864fb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fdb87112fa0 RCX: 00007fdb86e99e59 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006 RBP: 00007fdb86f2fd6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdb87113038 R14: 00007fdb87112fa0 R15: 00007ffc72ed1c48 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c31f320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 4 locks held by kworker/u4:1/144: #0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc900016cfd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 #2: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 #3: ffffffff8c323da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #3: ffffffff8c323da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845 4 locks held by kworker/u4:2/154: #0: ffff8880b913a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #1: ffff8880b9127888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4fe/0x7d0 kernel/sched/psi.c:891 #2: ffff88807c4b0688 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5319 [inline] #2: ffff88807c4b0688 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_wiphy_work+0x31/0x260 net/wireless/core.c:420 #3: ffff88805bc60d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1036 [inline] #3: ffff88805bc60d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa8/0x10e0 net/mac80211/ibss.c:1685 2 locks held by getty/3948: #0: ffff88802c4d6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158 2 locks held by kworker/1:4/4322: #0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc90002f4fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 1 lock held by udevd/4326: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.0.17/4331: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.0.17/4332: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4341: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4343: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4344: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.1.18/4354: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.1.18/4355: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.2.19/4368: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.2.19/4369: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 2 locks held by kworker/u4:5/4371: 1 lock held by udevd/4375: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.3.20/4385: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.3.20/4386: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4390: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.4.21/4407: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.4.21/4408: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4417: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.5.22/4433: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.5.22/4434: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.6.23/4453: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.6.23/4454: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4460: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4461: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.7.24/4477: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.7.24/4478: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.8.25/4501: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.8.25/4502: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz-executor/4506: #0: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5684 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe0f/0xe50 kernel/hung_task.c:369 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4506 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:look_up_lock_class+0x7c/0x110 kernel/locking/lockdep.c:889 Code: 48 b8 eb 83 b5 80 46 86 c8 61 49 0f af c7 48 c1 e8 34 48 8b 1c c5 00 a7 a6 92 e8 4f 01 00 00 48 85 db 74 4b 4c 39 7b 40 74 05 <48> 8b 1b eb eb 48 8b 83 b0 00 00 00 49 3b 46 18 74 35 49 81 3e 80 RSP: 0018:ffffc9000368e6d0 EFLAGS: 00000087 RAX: 0000000000000001 RBX: ffffffff8fba2380 RCX: ffff888023abbb80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888147fd5428 RBP: ffffc9000368e7d0 R08: dffffc0000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1b13f06 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888147fd5428 R15: ffffffff965f7b20 FS: 00005555753d2500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f82182a5cd2 CR3: 000000005c883000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xc0/0x890 kernel/locking/lockdep.c:1245 __lock_acquire+0x16f/0x7d10 kernel/locking/lockdep.c:4891 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:364 [inline] kobj_kset_join lib/kobject.c:203 [inline] kobject_add_internal+0x3a6/0xd90 lib/kobject.c:254 kobject_add_varg lib/kobject.c:398 [inline] kobject_init_and_add+0x128/0x190 lib/kobject.c:481 rx_queue_add_kobject net/core/net-sysfs.c:1059 [inline] net_rx_queue_update_kobjects+0x1af/0x490 net/core/net-sysfs.c:1110 register_queue_kobjects net/core/net-sysfs.c:1767 [inline] netdev_register_kobject+0x231/0x320 net/core/net-sysfs.c:2018 register_netdevice+0x1042/0x1710 net/core/dev.c:10423 geneve_configure+0x64b/0xa80 drivers/net/geneve.c:1443 geneve_newlink+0x103/0x1a0 drivers/net/geneve.c:1694 __rtnl_newlink net/core/rtnetlink.c:3529 [inline] rtnl_newlink+0x1359/0x1a50 net/core/rtnetlink.c:3577 rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5687 netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] __sys_sendto+0x46d/0x620 net/socket.c:2072 __do_sys_sendto net/socket.c:2084 [inline] __se_sys_sendto net/socket.c:2080 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f82181c168e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007fffa2395f88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00005555753d2500 RCX: 00007f82181c168e RDX: 000000000000006c RSI: 00007f8218fa8670 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00007fffa2396004 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f8218fa8670 R15: 0000000000000000 final repro crashed as (corrupted=false): INFO: task udevd:4326 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25264 pid: 4326 ppid: 3560 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 wait_on_page_bit_common+0x83b/0xe50 mm/filemap.c:1356 wait_on_page_bit mm/filemap.c:1417 [inline] wait_on_page_locked include/linux/pagemap.h:688 [inline] wait_on_page_read mm/filemap.c:3437 [inline] do_read_cache_page+0xb05/0x1030 mm/filemap.c:3480 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0xd4/0x4f0 block/partitions/core.c:726 adfspart_check_ICS+0xc3/0xe40 block/partitions/acorn.c:360 check_partition block/partitions/core.c:148 [inline] blk_add_partitions block/partitions/core.c:611 [inline] bdev_disk_changed+0x933/0x16c0 block/partitions/core.c:697 blkdev_get_whole+0x2f9/0x390 block/bdev.c:682 blkdev_get_by_dev+0x2d0/0xa60 block/bdev.c:827 blkdev_open+0x12d/0x2c0 block/fops.c:466 do_dentry_open+0x7ff/0xf80 fs/open.c:826 do_open fs/namei.c:3616 [inline] path_openat+0x26f5/0x2fa0 fs/namei.c:3750 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f37834bb407 RSP: 002b:00007ffcdbecdf40 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f37833cd880 RCX: 00007f37834bb407 RDX: 00000000000a0800 RSI: 00005580235eea50 RDI: ffffffffffffff9c RBP: 00005580235d5910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00005580235ede00 R13: 00005580235ed410 R14: 0000000000000000 R15: 00005580235ede00 INFO: task syz.0.17:4331 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26552 pid: 4331 ppid: 4315 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blkdev_put+0xf9/0x7d0 block/bdev.c:915 blkdev_close+0x76/0xa0 block/fops.c:478 __fput+0x234/0x930 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdb86e99e59 RSP: 002b:00007ffc72ed1da8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fdb87114da0 RCX: 00007fdb86e99e59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fdb87114da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fdb87114cb0 R11: 0000000000000246 R12: 0000000000027211 R13: 00007fdb87112fac R14: 0000000000026f2b R15: 00007ffc72ed1eb0 INFO: task syz.0.17:4332 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:27800 pid: 4332 ppid: 4315 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blkdev_put+0xf9/0x7d0 block/bdev.c:915 blkdev_close+0x76/0xa0 block/fops.c:478 __fput+0x234/0x930 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdb86e99e59 RSP: 002b:00007fdb864fb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fdb87112fa0 RCX: 00007fdb86e99e59 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006 RBP: 00007fdb86f2fd6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdb87113038 R14: 00007fdb87112fa0 R15: 00007ffc72ed1c48 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c31f320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 4 locks held by kworker/u4:1/144: #0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc900016cfd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 #2: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 #3: ffffffff8c323da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #3: ffffffff8c323da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845 4 locks held by kworker/u4:2/154: #0: ffff8880b913a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #1: ffff8880b9127888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4fe/0x7d0 kernel/sched/psi.c:891 #2: ffff88807c4b0688 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5319 [inline] #2: ffff88807c4b0688 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_wiphy_work+0x31/0x260 net/wireless/core.c:420 #3: ffff88805bc60d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1036 [inline] #3: ffff88805bc60d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa8/0x10e0 net/mac80211/ibss.c:1685 2 locks held by getty/3948: #0: ffff88802c4d6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158 2 locks held by kworker/1:4/4322: #0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1 #1: ffffc90002f4fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285 1 lock held by udevd/4326: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.0.17/4331: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.0.17/4332: #0: ffff888020d08518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4341: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4343: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4344: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.1.18/4354: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.1.18/4355: #0: ffff8880209a0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.2.19/4368: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.2.19/4369: #0: ffff8880209a2518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 2 locks held by kworker/u4:5/4371: 1 lock held by udevd/4375: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.3.20/4385: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.3.20/4386: #0: ffff888020d0b518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4390: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.4.21/4407: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.4.21/4408: #0: ffff888020d14518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4417: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.5.22/4433: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.5.22/4434: #0: ffff888021108518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.6.23/4453: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.6.23/4454: #0: ffff888020d16d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by udevd/4460: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by udevd/4461: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 1 lock held by syz.7.24/4477: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.7.24/4478: #0: ffff88802110ad18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.8.25/4501: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz.8.25/4502: #0: ffff8880213c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 1 lock held by syz-executor/4506: #0: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d43dbc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5684 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe0f/0xe50 kernel/hung_task.c:369 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4506 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:look_up_lock_class+0x7c/0x110 kernel/locking/lockdep.c:889 Code: 48 b8 eb 83 b5 80 46 86 c8 61 49 0f af c7 48 c1 e8 34 48 8b 1c c5 00 a7 a6 92 e8 4f 01 00 00 48 85 db 74 4b 4c 39 7b 40 74 05 <48> 8b 1b eb eb 48 8b 83 b0 00 00 00 49 3b 46 18 74 35 49 81 3e 80 RSP: 0018:ffffc9000368e6d0 EFLAGS: 00000087 RAX: 0000000000000001 RBX: ffffffff8fba2380 RCX: ffff888023abbb80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888147fd5428 RBP: ffffc9000368e7d0 R08: dffffc0000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1b13f06 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888147fd5428 R15: ffffffff965f7b20 FS: 00005555753d2500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f82182a5cd2 CR3: 000000005c883000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xc0/0x890 kernel/locking/lockdep.c:1245 __lock_acquire+0x16f/0x7d10 kernel/locking/lockdep.c:4891 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:364 [inline] kobj_kset_join lib/kobject.c:203 [inline] kobject_add_internal+0x3a6/0xd90 lib/kobject.c:254 kobject_add_varg lib/kobject.c:398 [inline] kobject_init_and_add+0x128/0x190 lib/kobject.c:481 rx_queue_add_kobject net/core/net-sysfs.c:1059 [inline] net_rx_queue_update_kobjects+0x1af/0x490 net/core/net-sysfs.c:1110 register_queue_kobjects net/core/net-sysfs.c:1767 [inline] netdev_register_kobject+0x231/0x320 net/core/net-sysfs.c:2018 register_netdevice+0x1042/0x1710 net/core/dev.c:10423 geneve_configure+0x64b/0xa80 drivers/net/geneve.c:1443 geneve_newlink+0x103/0x1a0 drivers/net/geneve.c:1694 __rtnl_newlink net/core/rtnetlink.c:3529 [inline] rtnl_newlink+0x1359/0x1a50 net/core/rtnetlink.c:3577 rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5687 netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] __sys_sendto+0x46d/0x620 net/socket.c:2072 __do_sys_sendto net/socket.c:2084 [inline] __se_sys_sendto net/socket.c:2080 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f82181c168e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007fffa2395f88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00005555753d2500 RCX: 00007f82181c168e RDX: 000000000000006c RSI: 00007f8218fa8670 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00007fffa2396004 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f8218fa8670 R15: 0000000000000000