syzbot


INFO: task hung in process_measurement (3)

Status: upstream: reported on 2025/11/13 09:59
Reported-by: syzbot+4e93a2dbb33785540085@syzkaller.appspotmail.com
First crash: 60d, last: 29d
Similar bugs (13)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 INFO: task hung in process_measurement 1 1 4d13h 4d13h 0/2 upstream: reported on 2026/01/07 21:55
linux-6.1 INFO: task hung in process_measurement (2) 1 1 367d 367d 0/3 auto-obsoleted due to no activity on 2025/04/20 01:13
linux-5.15 INFO: task hung in process_measurement (3) origin:lts-only 1 C done 5 5d05h 250d 0/3 upstream: reported C repro on 2025/05/07 00:26
linux-5.15 INFO: task hung in process_measurement 1 1 904d 904d 0/3 auto-obsoleted due to no activity on 2023/10/31 09:35
upstream INFO: task hung in process_measurement (3) lsm integrity 1 C done done 58 7d01h 235d 0/29 upstream: reported C repro on 2025/05/21 17:47
linux-4.19 INFO: task hung in process_measurement 1 2 2234d 2310d 0/1 auto-closed as invalid on 2020/03/29 20:33
upstream INFO: task hung in process_measurement integrity lsm 1 C done inconclusive 52 1628d 2660d 0/29 closed as invalid on 2022/02/08 10:56
upstream INFO: task hung in process_measurement (2) lsm integrity 1 C done 607 252d 856d 28/29 fixed on 2025/05/06 15:33
linux-4.19 INFO: task hung in process_measurement (3) 1 5 1042d 1047d 0/1 upstream: reported on 2023/03/02 09:48
linux-4.14 INFO: task hung in process_measurement 1 3 2129d 2185d 0/1 auto-closed as invalid on 2020/07/13 00:59
linux-6.1 INFO: task hung in process_measurement 1 39 546d 555d 0/3 auto-obsoleted due to no activity on 2024/09/23 07:47
linux-5.15 INFO: task hung in process_measurement (2) 1 97 446d 555d 0/3 auto-obsoleted due to no activity on 2025/01/01 08:25
linux-4.19 INFO: task hung in process_measurement (2) 1 1 1903d 1903d 0/1 auto-closed as invalid on 2021/02/23 17:00

Sample crash report:
INFO: task syz.6.912:8601 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D stack:28656 pid:8601  ppid:6319   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 rwsem_down_write_slowpath+0xbed/0x1090 kernel/locking/rwsem.c:1189
 inode_lock include/linux/fs.h:758 [inline]
 process_measurement+0x33c/0x1a10 security/integrity/ima/ima_main.c:242
 ima_file_mmap+0x104/0x150 security/integrity/ima/ima_main.c:429
 vm_mmap_pgoff+0x11f/0x2b0 mm/util.c:516
 ksys_mmap_pgoff+0x516/0x6f0 mm/mmap.c:1482
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
RSP: 002b:00007fb736651038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fb7359e6090 RCX: 00007fb73578f749
RDX: 88fd537e5c114b6e RSI: 0000000000003000 RDI: 0000200000000000
RBP: 00007fb735813f91 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e6128 R14: 00007fb7359e6090 R15: 00007ffde322e128
 </TASK>
INFO: task syz.6.912:8603 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D
 stack:29184 pid:8603  ppid:6319   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_ioctl+0x62/0x330 fs/reiserfs/ioctl.c:81
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
RSP: 002b:00007fb736630038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb7359e6180 RCX: 00007fb73578f749
RDX: fffffffffffff801 RSI: 0000000040044900 RDI: 0000000000000004
RBP: 00007fb735813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e6218 R14: 00007fb7359e6180 R15: 00007ffde322e128
 </TASK>
INFO: task syz.6.912:8606 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D
 stack:29184 pid:8606  ppid:6319   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_ioctl+0x62/0x330 fs/reiserfs/ioctl.c:81
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
RSP: 002b:00007fb73660f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb7359e6270 RCX: 00007fb73578f749
RDX: 0000200000000000 RSI: 00000000c00c642d RDI: 0000000000000004
RBP: 00007fb735813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e6308 R14: 00007fb7359e6270 R15: 00007ffde322e128
 </TASK>
INFO: task syz.6.912:8607 blocked for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D stack:29184 pid:8607  ppid:6319   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_ioctl+0x62/0x330 fs/reiserfs/ioctl.c:81
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
RSP: 002b:00007fb7365ee038 EFLAGS: 00000246
 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb7359e6360 RCX: 00007fb73578f749
RDX: 0000200000000180 RSI: 00000000c02064b9 RDI: 0000000000000004
RBP: 00007fb735813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e63f8 R14: 00007fb7359e6360 R15: 00007ffde322e128
 </TASK>
INFO: task syz.6.912:8609 blocked for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D stack:27904 pid:8609  ppid:6319   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
 reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
 reiserfs_ioctl+0x62/0x330 fs/reiserfs/ioctl.c:81
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
RSP: 002b:00007fb7365cd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb7359e6450 RCX: 00007fb73578f749
RDX: 0000200000000340 RSI: 0000000000008933 RDI: 0000000000000004
RBP: 00007fb735813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e64e8 R14: 00007fb7359e6450 R15: 00007ffde322e128
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c92bab0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c92c2d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
 #0: 
ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
3 locks held by kworker/1:2/126:
 #0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: ffffc90002de7d00 (deferred_process_work){+.+.}-{0:0}
, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:104
1 lock held by dhcpcd/3932:
 #0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 #0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
2 locks held by getty/4032:
 #0: ffff88814cf41098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
2 locks held by kworker/0:3/4255:
 #0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: ffffc90003c67d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
3 locks held by kworker/0:4/4309:
 #0: 
ffff88814ccf0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: ffffc90003f77d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x14d0 net/ipv6/addrconf.c:4131
3 locks held by kworker/0:5/4324:
 #0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: 
ffffc90004477d00
 (
(work_completion)(&data->fib_event_work)
){+.+.}-{0:0}
, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: 
ffff88807790d240
 (&data->fib_lock
){+.+.}-{3:3}, at: nsim_fib_event_work+0x26b/0x32b0 drivers/net/netdevsim/fib.c:1491
4 locks held by kworker/0:6/4338:
 #0: 
ffff888017471138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: ffffc90004557d00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: ffff8880696b80e0 (&type->s_umount_key#66){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
 #3: ffff88805aae5090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
6 locks held by kworker/u4:8/4394:
 #0: ffff888017616938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: ffffc90004af7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: ffffffff8db2e6d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x132/0xb80 net/core/net_namespace.c:594
 #3: ffff88806361c2f8 (&devlink->lock_key#12){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0xf8/0x270 net/devlink/leftover.c:12500
 #4: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x3b/0x150 drivers/net/netdevsim/netdev.c:381
 #5: 
ffffffff8c930df8
 (
rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x830 kernel/rcu/tree_exp.h:962
3 locks held by kworker/1:17/7938:
 #0: ffff88814ccf0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #1: 
ffffc900049b7d00
 (
(work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
 #2: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x14d0 net/ipv6/addrconf.c:4131
4 locks held by syz.6.912/8579:
1 lock held by syz.6.912/8601:
 #0: ffff8880726fb140 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #0: ffff8880726fb140 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: process_measurement+0x33c/0x1a10 security/integrity/ima/ima_main.c:242
1 lock held by syz.6.912/8603:
 #0: ffff88805aae5090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by syz.6.912/8606:
 #0: ffff88805aae5090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by syz.6.912/8607:
 #0: ffff88805aae5090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by syz.6.912/8609:
 #0: ffff88805aae5090
 (
&sbi->lock
){+.+.}-{3:3}
, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by syz-executor/10009:
 #0: 
ffffffff8db3b3a8
 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
1 lock held by syz-executor/10020:
 #0: ffffffff8db3b3a8 (rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
1 lock held by syz-executor/10028:
 #0: 
ffffffff8db3b3a8
 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xeee/0xf30 kernel/hung_task.c:377
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8579 Comm: syz.6.912 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x81/0x290 mm/kasan/generic.c:189
Code: 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 48 f7 d3 4c 01 db 41 80 39 00 0f 85 c1 01 00 00 <49> ff c1 48 ff c3 75 ee e9 1c 01 00 00 44 89 cb 83 e3 07 0f 84 b5
RSP: 0018:ffffc90000007780 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff8163bb14
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff908c8250
RBP: 0000000000000008 R08: dffffc0000000000 R09: fffffbfff211904a
R10: fffffbfff211904b R11: 1ffffffff211904a R12: 0000000000000100
R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000001
FS:  00007fb7366726c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005576ed732a38 CR3: 000000007c854000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 mark_lock+0x94/0x320 kernel/locking/lockdep.c:4606
 mark_usage kernel/locking/lockdep.c:4549 [inline]
 __lock_acquire+0xd6f/0x7c50 kernel/locking/lockdep.c:5003
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 call_timer_fn+0xde/0x670 kernel/time/timer.c:1698
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x529/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1948 [inline]
RIP: 0010:vprintk_emit+0x461/0x680 kernel/printk/printk.c:2302
Code: 85 8f 01 00 00 e8 af b9 1a 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 9e b9 1a 00 eb 06 e8 97 b9 1a 00 fb 48 c7 c7 c0 f3 91 8c <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 37 db
RSP: 0018:ffffc9000e14ece0 EFLAGS: 00000246
RAX: ffffffff81662639 RBX: ffffffff816624e5 RCX: 0000000000080000
RDX: ffffc9000f963000 RSI: 000000000007ffff RDI: ffffffff8c91f3c0
RBP: ffffc9000e14edd0 R08: dffffc0000000000 R09: fffffbfff2119072
R10: fffffbfff2119072 R11: 1ffffffff2119071 R12: dffffc0000000000
R13: 1ffff92001c29da0 R14: 0000000000000200 R15: 0000000000000086
 _printk+0xcc/0x110 kernel/printk/printk.c:2328
 __reiserfs_warning+0x14e/0x1a0 fs/reiserfs/prints.c:290
 reiserfs_read_bitmap_block+0x24c/0x730 fs/reiserfs/bitmap.c:1434
 scan_bitmap_block+0x1ad/0xde0 fs/reiserfs/bitmap.c:164
 scan_bitmap fs/reiserfs/bitmap.c:402 [inline]
 allocate_without_wrapping_disk fs/reiserfs/bitmap.c:1161 [inline]
 blocknrs_and_prealloc_arrays_from_search_start fs/reiserfs/bitmap.c:1274 [inline]
 reiserfs_allocate_blocknrs+0x367a/0x53b0 fs/reiserfs/bitmap.c:1375
 _allocate_block fs/reiserfs/inode.c:-1 [inline]
 reiserfs_get_block+0x266f/0x3ef0 fs/reiserfs/inode.c:756
 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991
 reiserfs_write_begin+0x206/0x4c0 fs/reiserfs/inode.c:2775
 generic_perform_write+0x2f7/0x5a0 mm/filemap.c:3862
 __generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x44c/0x960 fs/read_write.c:584
 ksys_write+0x143/0x240 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb73578f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb736672038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb7359e5fa0 RCX: 00007fb73578f749
RDX: 0000000000000118 RSI: 0000200000000340 RDI: 0000000000000004
RBP: 00007fb735813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7359e6038 R14: 00007fb7359e5fa0 R15: 00007ffde322e128
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/13 18:12 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in process_measurement
2025/11/13 09:58 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in process_measurement
* Struck through repros no longer work on HEAD.