Extracting prog: 4m38.615370469s
Minimizing prog: 24m18.031527378s
Simplifying prog options: 0s
Extracting C: 3m4.921637602s
Simplifying C: 23m13.417986868s
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$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C 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$nullb-dup-fallocate
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$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: 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$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$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: 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$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$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 1h4m37.713637665s
repro crashed as (corrupted=false):
INFO: task syz.4.21:6077 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:27800 pid:6077 tgid:6077 ppid:5954 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f569c59c819
RSP: 002b:00007fffa5647e18 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f569c815fa0 RCX: 00007f569c59c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f569c632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f569c815fac R14: 00007f569c815fa0 R15: 00007f569c815fa0
INFO: task syz.2.19:6078 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19 state:D stack:27800 pid:6078 tgid:6078 ppid:5945 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7710f9c819
RSP: 002b:00007ffc63336d48 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f7711215fa0 RCX: 00007f7710f9c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f7711032c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7711215fac R14: 00007f7711215fa0 R15: 00007f7711215fa0
INFO: task syz.0.17:6079 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:27784 pid:6079 tgid:6079 ppid:5939 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f00e559c819
RSP: 002b:00007ffd0d989a48 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f00e5815fa0 RCX: 00007f00e559c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f00e5632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f00e5815fac R14: 00007f00e5815fa0 R15: 00007f00e5815fa0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by getty/5570:
#0: ffff88803a5780a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14f0 drivers/tty/n_tty.c:2211
2 locks held by syz.1.18/6076:
1 lock held by syz.4.21/6077:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.19/6078:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.17/6079:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.24/6220:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.23/6221:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.26/6222:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.22/6223:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.25/6224:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.27/6315:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.28/6316:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.29/6321:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.30/6332:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.31/6333:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.32/6457:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.33/6459:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.34/6470:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.36/6472:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.35/6473:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.37/6561:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.38/6562:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.39/6582:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.40/6583:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.41/6584:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.42/6684:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.43/6697:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.45/6718:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.46/6719:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.44/6720:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.47/6800:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.48/6822:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.49/6829:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.50/6834:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.51/6835:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: d6 88 02 e9 83 42 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 b0 13 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df0 EFLAGS: 00000242
RAX: 000000000016cc19 RBX: ffff88801e6f2500 RCX: ffffffff8b97e045
RDX: 0000000000000000 RSI: ffffffff8df53c55 RDI: ffffffff8c1c0e00
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10170a67ad
R10: ffff8880b8533d6b R11: 0000000000000000 R12: 0000000000000001
R13: ffffed1003cde4a0 R14: 0000000000000001 R15: ffffffff90dbba50
FS: 0000000000000000(0000) GS:ffff8881243ef000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556065a4e8 CR3: 0000000070655000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148
final repro crashed as (corrupted=false):
INFO: task syz.4.21:6077 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:27800 pid:6077 tgid:6077 ppid:5954 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f569c59c819
RSP: 002b:00007fffa5647e18 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f569c815fa0 RCX: 00007f569c59c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f569c632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f569c815fac R14: 00007f569c815fa0 R15: 00007f569c815fa0
INFO: task syz.2.19:6078 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19 state:D stack:27800 pid:6078 tgid:6078 ppid:5945 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7710f9c819
RSP: 002b:00007ffc63336d48 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f7711215fa0 RCX: 00007f7710f9c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f7711032c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7711215fac R14: 00007f7711215fa0 R15: 00007f7711215fa0
INFO: task syz.0.17:6079 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:27784 pid:6079 tgid:6079 ppid:5939 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7282
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7339
rwsem_down_write_slowpath+0x4c2/0x12c0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1c7/0x1f0 kernel/locking/rwsem.c:1626
inode_lock include/linux/fs.h:1029 [inline]
blkdev_fallocate+0x24b/0x440 block/fops.c:907
vfs_fallocate+0x576/0x10d0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xd5/0x140 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f00e559c819
RSP: 002b:00007ffd0d989a48 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f00e5815fa0 RCX: 00007f00e559c819
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004
RBP: 00007f00e5632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f00e5815fac R14: 00007f00e5815fa0 R15: 00007f00e5815fa0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e7e5460 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
2 locks held by getty/5570:
#0: ffff88803a5780a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14f0 drivers/tty/n_tty.c:2211
2 locks held by syz.1.18/6076:
1 lock held by syz.4.21/6077:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.19/6078:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.17/6079:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.24/6220:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.23/6221:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.26/6222:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.22/6223:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.25/6224:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.27/6315:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.28/6316:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.29/6321:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.30/6332:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.31/6333:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.32/6457:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.33/6459:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.34/6470:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.36/6472:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.35/6473:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.37/6561:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.38/6562:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.39/6582:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.40/6583:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.41/6584:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.6.42/6684:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.7.43/6697:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.8.45/6718:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.9.46/6719:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.5.44/6720:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.0.47/6800:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.1.48/6822:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.2.49/6829:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.3.50/6834:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
1 lock held by syz.4.51/6835:
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888027d41360 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x24b/0x440 block/fops.c:907
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: d6 88 02 e9 83 42 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 b0 13 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df0 EFLAGS: 00000242
RAX: 000000000016cc19 RBX: ffff88801e6f2500 RCX: ffffffff8b97e045
RDX: 0000000000000000 RSI: ffffffff8df53c55 RDI: ffffffff8c1c0e00
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed10170a67ad
R10: ffff8880b8533d6b R11: 0000000000000000 R12: 0000000000000001
R13: ffffed1003cde4a0 R14: 0000000000000001 R15: ffffffff90dbba50
FS: 0000000000000000(0000) GS:ffff8881243ef000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556065a4e8 CR3: 0000000070655000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148