Extracting prog: 4m52.554662646s Minimizing prog: 24m13.88143469s Simplifying prog options: 14m59.889540932s Extracting C: 5m9.722196072s 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program crashed: INFO: task hung in blkdev_fallocate single: successfully extracted reproducer found reproducer with 3 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}}): openat$nullb-dup detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) dup(r0) 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}}): openat$nullb-fallocate detailed listing: executing program 0: openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) fallocate(0xffffffffffffffff, 0x10, 0x0, 0x2000000400) 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}}): dup-fallocate detailed listing: executing program 0: r0 = dup(0xffffffffffffffff) fallocate(r0, 0x10, 0x0, 0x2000000400) 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, 0x0, 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) 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}}): openat$nullb-dup-fallocate program crashed: no output from test machine a never seen crash title: no output from test machine, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program crashed: INFO: task hung in blkdev_fallocate extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing program (duration=6m0s, {Threaded:false 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program did not crash 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program crashed: INFO: task hung in blkdev_fallocate validation run: crashed=true 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program crashed: INFO: task hung in blkdev_fallocate validation run: crashed=true 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}}): openat$nullb-dup-fallocate detailed listing: executing program 0: r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000080), 0x162e02, 0x0) r1 = dup(r0) fallocate(r1, 0x10, 0x0, 0x2000000400) program crashed: INFO: task hung in blkdev_fallocate validation run: crashed=true reproducing took 1h0m16.306975357s repro crashed as (corrupted=false): INFO: task syz.6.23:4655 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.23 state:D stack:0 pid:4655 ppid:4609 flags:0x00000001 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 rwsem_down_write_slowpath+0xb60/0x1280 kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 vfs_fallocate+0x4a4/0x5f4 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __arm64_sys_fallocate+0xc0/0x110 fs/open.c:352 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153f7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000153f8450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000153f72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by kworker/u4:2/39: 1 lock held by klogd/3924: 2 locks held by getty/4081: #0: ffff0000c0933098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000208ee2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 2 locks held by syz.7.24/4654: 1 lock held by syz.6.23/4655: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.26/4928: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.25/4935: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.27/5034: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.28/5094: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.29/5095: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.32/5167: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.30/5202: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.33/5203: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.31/5204: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.34/5205: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.37/5269: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.36/5299: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.39/5300: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.38/5301: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.35/5302: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.43/5397: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.41/5410: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.40/5411: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.42/5412: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.44/5413: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.49/5499: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.48/5500: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.45/5501: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.47/5502: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.46/5503: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.52/5595: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.53/5606: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.51/5618: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.50/5623: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.54/5624: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 ============================================= final repro crashed as (corrupted=false): INFO: task syz.6.23:4655 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.23 state:D stack:0 pid:4655 ppid:4609 flags:0x00000001 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 rwsem_down_write_slowpath+0xb60/0x1280 kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 vfs_fallocate+0x4a4/0x5f4 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __arm64_sys_fallocate+0xc0/0x110 fs/open.c:352 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153f7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000153f8450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000153f72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by kworker/u4:2/39: 1 lock held by klogd/3924: 2 locks held by getty/4081: #0: ffff0000c0933098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000208ee2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 2 locks held by syz.7.24/4654: 1 lock held by syz.6.23/4655: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.26/4928: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.25/4935: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.27/5034: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.28/5094: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.29/5095: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.32/5167: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.30/5202: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.33/5203: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.31/5204: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.34/5205: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.37/5269: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.36/5299: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.39/5300: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.38/5301: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.35/5302: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.43/5397: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.41/5410: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.40/5411: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.42/5412: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.44/5413: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.3.49/5499: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.2.48/5500: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.0.45/5501: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.9.47/5502: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.8.46/5503: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.6.52/5595: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.5.53/5606: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.1.51/5618: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.7.50/5623: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 1 lock held by syz.4.54/5624: #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000c0498738 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: blkdev_fallocate+0x1b8/0x3fc block/fops.c:712 =============================================