INFO: task syz-executor:12708 blocked for more than 143 seconds. Not tainted 6.12.0-next-20241118-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21088 pid:12708 tgid:12708 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 __gfs2_trans_begin+0x55d/0x950 fs/gfs2/trans.c:87 gfs2_trans_begin+0x71/0xe0 fs/gfs2/trans.c:118 gfs2_write_jdata_batch fs/gfs2/aops.c:194 [inline] gfs2_write_cache_jdata+0x60e/0x1fa0 fs/gfs2/aops.c:323 gfs2_jdata_writepages+0x85/0x160 fs/gfs2/aops.c:366 gfs2_ail1_start_one fs/gfs2/log.c:134 [inline] gfs2_ail1_flush+0xb83/0xf40 fs/gfs2/log.c:215 gfs2_ail1_start fs/gfs2/log.c:246 [inline] empty_ail1_list+0x1a5/0x3c0 fs/gfs2/log.c:978 gfs2_log_flush+0x20f2/0x2610 fs/gfs2/log.c:1130 gfs2_kill_sb+0x5b/0x350 fs/gfs2/ops_fstype.c:1775 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbb1e97fa87 RSP: 002b:00007ffefb7d7fc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fbb1e97fa87 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffefb7d8080 RBP: 00007ffefb7d8080 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffefb7d9100 R13: 00007fbb1e9f15fc R14: 000000000005c4a2 R15: 00007ffefb7d9140 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-next-20241118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0xffb/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.12.0-next-20241118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:debug_rcu_head_callback kernel/rcu/rcu.h:251 [inline] RIP: 0010:rcu_do_batch kernel/rcu/tree.c:2565 [inline] RIP: 0010:rcu_core+0xa78/0x17a0 kernel/rcu/tree.c:2823 Code: 54 e8 ac ce f3 ff 48 83 c4 08 4c 89 e8 4d 8d 6f 08 4c 89 eb 48 c1 eb 03 80 3c 03 00 74 08 4c 89 ef e8 2c 92 83 00 4d 8b 75 00 <4d> 85 f6 0f 84 68 02 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 03 RSP: 0018:ffffc90000007ca0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff1100bb7a398 RCX: ffffffff817aa964 RDX: 0000000000000000 RSI: ffffffff8c5e8640 RDI: ffffffff8c5e8600 RBP: ffffc90000007ed0 R08: ffffffff90186377 R09: 1ffffffff2030c6e R10: dffffc0000000000 R11: fffffbfff2030c6f R12: ffffffff8186d9c7 R13: ffff88805dbd1cc0 R14: ffffffff82255450 R15: ffff88805dbd1cb8 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8efa513d58 CR3: 000000000e736000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x312/0x3b0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244