Extracting prog: 8m45.752469463s
Minimizing prog: 30m40.425956557s
Simplifying prog options: 0s
Extracting C: 3m10.295421597s
Simplifying C: 21m43.401208391s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs: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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

program did not crash
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

program did not crash
single: failed to extract reproducer
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

program crashed: INFO: task hung in hfs_mdb_commit
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-unlinkat
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, 0x0, 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f0000000000), &(0x7f0000000100)='./file1\x00', 0x1200001, &(0x7f0000000080)={[{@gid}, {@codepage={'codepage', 0x3d, 'cp850'}}, {}, {@iocharset={'iocharset', 0x3d, 'cp869'}}]}, 0x2, 0x33c, &(0x7f0000001f80)="$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")
mount(0x0, &(0x7f0000000000)='.\x00', 0x0, 0x2012024, 0x0)
unlinkat(0xffffffffffffff9c, 0x0, 0x0)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs-mount-unlinkat
program crashed: INFO: task hung in hfs_mdb_commit
reproducing took 1h4m19.875083678s
repro crashed as (corrupted=false):
INFO: task kworker/1:1:43 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1     state:D stack:26760 pid:43    tgid:43    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_long flush_mdb
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 io_schedule+0x81/0xe0 kernel/sched/core.c:7723
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:247
 __wait_on_bit_lock+0xe9/0x4f0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0x123/0x170 kernel/sched/wait_bit.c:117
 lock_buffer include/linux/buffer_head.h:434 [inline]
 hfs_mdb_commit+0xb0d/0x1160 fs/hfs/mdb.c:325
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by kworker/1:1/43:
 #0: ffff88801a481548 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88801a481548 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
 #1: ffffc90000b37bc0 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90000b37bc0 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
5 locks held by kworker/u8:5/1092:
 #0: ffff8880b873b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
 #1: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
 #2: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xe5/0x250 kernel/sched/psi.c:912
 #3: ffffffff99c37570 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0xbb/0x420 lib/debugobjects.c:818
 #4: ffffffff8dfea588 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145
2 locks held by getty/5584:
 #0: ffff888034bf20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by syz-executor151/5843:
 #0: ffff8880b873b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
 #1: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
 #2: ffff8880738bb600 (&sb->s_type->i_lock_key#24){+.+.}-{3:3}, at: spin_trylock include/linux/spinlock.h:361 [inline]
 #2: ffff8880738bb600 (&sb->s_type->i_lock_key#24){+.+.}-{3:3}, at: lock_for_kill+0x84/0x210 fs/dcache.c:714
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: page_table_check_set+0x18d/0x730 mm/page_table_check.c:112

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
 watchdog+0xfee/0x1030 kernel/hung_task.c:470
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18587 Comm: syz-executor151 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x11/0x90 kernel/kcov.c:321
Code: cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 a0 99 92 <65> 8b 15 48 4d d9 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc9000ed773d8 EFLAGS: 00000246
RAX: ffffffff822cb04f RBX: 0000000000000000 RCX: ffff88804fb13c00
RDX: ffff88804fb13c00 RSI: 0000000000006aae RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff88801e21565f R09: 1ffff11003c42acb
R10: dffffc0000000000 R11: ffffed1003c42acc R12: ffff88801e215610
R13: 0000000000000000 R14: 0000000000076aae R15: 0000000000076aae
FS:  0000555566b1a380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc57c07c00 CR3: 0000000077f2c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 page_ext_iter_next_fast_possible include/linux/page_ext.h:80 [inline]
 page_ext_iter_next include/linux/page_ext.h:155 [inline]
 __page_table_check_zero+0x29f/0x530 mm/page_table_check.c:139
 page_table_check_alloc include/linux/page_table_check.h:35 [inline]
 post_alloc_hook+0x253/0x2a0 mm/page_alloc.c:1705
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2438
 shmem_alloc_folio mm/shmem.c:1851 [inline]
 shmem_alloc_and_add_folio+0x447/0xf60 mm/shmem.c:1890
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2532
 shmem_get_folio mm/shmem.c:2638 [inline]
 shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3288
 generic_perform_write+0x2c4/0x910 mm/filemap.c:4112
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3463
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc60079f60
Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 21 a1 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffdd5e4b108 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffdd5e4b120 RCX: 00007efc60079f60
RDX: 0000000000008000 RSI: 00007efc57c00000 RDI: 0000000000000003
RBP: 000000000004618b R08: 000000000000033a R09: 0000000000000334
R10: 00000000000001c8 R11: 0000000000000202 R12: 00007ffdd5e4b2c0
R13: 00007efc57c00000 R14: 0000000000000003 R15: 00007ffdd5e4b160
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.257 msecs

final repro crashed as (corrupted=false):
INFO: task kworker/1:1:43 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1     state:D stack:26760 pid:43    tgid:43    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_long flush_mdb
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 io_schedule+0x81/0xe0 kernel/sched/core.c:7723
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:247
 __wait_on_bit_lock+0xe9/0x4f0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0x123/0x170 kernel/sched/wait_bit.c:117
 lock_buffer include/linux/buffer_head.h:434 [inline]
 hfs_mdb_commit+0xb0d/0x1160 fs/hfs/mdb.c:325
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by kworker/1:1/43:
 #0: ffff88801a481548 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff88801a481548 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
 #1: ffffc90000b37bc0 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc90000b37bc0 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
5 locks held by kworker/u8:5/1092:
 #0: ffff8880b873b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
 #1: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
 #2: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xe5/0x250 kernel/sched/psi.c:912
 #3: ffffffff99c37570 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0xbb/0x420 lib/debugobjects.c:818
 #4: ffffffff8dfea588 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145
2 locks held by getty/5584:
 #0: ffff888034bf20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by syz-executor151/5843:
 #0: ffff8880b873b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
 #1: ffff8880b8723f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
 #2: ffff8880738bb600 (&sb->s_type->i_lock_key#24){+.+.}-{3:3}, at: spin_trylock include/linux/spinlock.h:361 [inline]
 #2: ffff8880738bb600 (&sb->s_type->i_lock_key#24){+.+.}-{3:3}, at: lock_for_kill+0x84/0x210 fs/dcache.c:714
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: page_table_check_set+0x18d/0x730 mm/page_table_check.c:112

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
 watchdog+0xfee/0x1030 kernel/hung_task.c:470
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18587 Comm: syz-executor151 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x11/0x90 kernel/kcov.c:321
Code: cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 a0 99 92 <65> 8b 15 48 4d d9 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc9000ed773d8 EFLAGS: 00000246
RAX: ffffffff822cb04f RBX: 0000000000000000 RCX: ffff88804fb13c00
RDX: ffff88804fb13c00 RSI: 0000000000006aae RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff88801e21565f R09: 1ffff11003c42acb
R10: dffffc0000000000 R11: ffffed1003c42acc R12: ffff88801e215610
R13: 0000000000000000 R14: 0000000000076aae R15: 0000000000076aae
FS:  0000555566b1a380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc57c07c00 CR3: 0000000077f2c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 page_ext_iter_next_fast_possible include/linux/page_ext.h:80 [inline]
 page_ext_iter_next include/linux/page_ext.h:155 [inline]
 __page_table_check_zero+0x29f/0x530 mm/page_table_check.c:139
 page_table_check_alloc include/linux/page_table_check.h:35 [inline]
 post_alloc_hook+0x253/0x2a0 mm/page_alloc.c:1705
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2438
 shmem_alloc_folio mm/shmem.c:1851 [inline]
 shmem_alloc_and_add_folio+0x447/0xf60 mm/shmem.c:1890
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2532
 shmem_get_folio mm/shmem.c:2638 [inline]
 shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3288
 generic_perform_write+0x2c4/0x910 mm/filemap.c:4112
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3463
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc60079f60
Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 21 a1 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffdd5e4b108 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffdd5e4b120 RCX: 00007efc60079f60
RDX: 0000000000008000 RSI: 00007efc57c00000 RDI: 0000000000000003
RBP: 000000000004618b R08: 000000000000033a R09: 0000000000000334
R10: 00000000000001c8 R11: 0000000000000202 R12: 00007ffdd5e4b2c0
R13: 00007efc57c00000 R14: 0000000000000003 R15: 00007ffdd5e4b160
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.257 msecs