INFO: task syz.0.344:7441 blocked for more than 144 seconds.
      Not tainted 6.12.0-next-20241120-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.344       state:D stack:14448 pid:7441  tgid:7440  ppid:5829   flags:0x00004006
Call Trace:
 <TASK>
 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
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
 bch2_trans_mutex_lock_norelock fs/bcachefs/alloc_foreground.c:43 [inline]
 writepoint_find fs/bcachefs/alloc_foreground.c:1229 [inline]
 bch2_alloc_sectors_start_trans+0x956/0x2030 fs/bcachefs/alloc_foreground.c:1335
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:333 [inline]
 bch2_btree_reserve_get+0x612/0x1890 fs/bcachefs/btree_update_interior.c:543
 bch2_btree_update_start+0xe56/0x14e0 fs/bcachefs/btree_update_interior.c:1241
 bch2_btree_split_leaf+0x121/0x880 fs/bcachefs/btree_update_interior.c:1857
 bch2_trans_commit_error+0x212/0x1390 fs/bcachefs/btree_trans_commit.c:918
 __bch2_trans_commit+0x7f95/0x9520 fs/bcachefs/btree_trans_commit.c:1095
 bch2_trans_commit fs/bcachefs/btree_update.h:182 [inline]
 bch2_check_discard_freespace_key+0xba7/0x1120 fs/bcachefs/alloc_background.c:1385
 try_alloc_bucket fs/bcachefs/alloc_foreground.c:287 [inline]
 bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:443 [inline]
 bch2_bucket_alloc_trans+0x1584/0x2fd0 fs/bcachefs/alloc_foreground.c:570
 bch2_bucket_alloc_set_trans+0x517/0xd30 fs/bcachefs/alloc_foreground.c:730
 __open_bucket_add_buckets+0x13d0/0x1ec0 fs/bcachefs/alloc_foreground.c:979
 open_bucket_add_buckets+0x33a/0x410 fs/bcachefs/alloc_foreground.c:1023
 bch2_alloc_sectors_start_trans+0xce9/0x2030
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:333 [inline]
 bch2_btree_reserve_get+0x612/0x1890 fs/bcachefs/btree_update_interior.c:543
 bch2_btree_update_start+0xe56/0x14e0 fs/bcachefs/btree_update_interior.c:1241
 bch2_btree_split_leaf+0x121/0x880 fs/bcachefs/btree_update_interior.c:1857
 bch2_trans_commit_error+0x212/0x1390 fs/bcachefs/btree_trans_commit.c:918
 __bch2_trans_commit+0x7f95/0x9520 fs/bcachefs/btree_trans_commit.c:1095
 bch2_trans_commit fs/bcachefs/btree_update.h:182 [inline]
 bch2_journal_replay+0x1a18/0x2a70 fs/bcachefs/recovery.c:353
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:222
 bch2_run_recovery_passes+0x290/0x9f0 fs/bcachefs/recovery_passes.c:285
 bch2_fs_recovery+0x2666/0x3a90 fs/bcachefs/recovery.c:898
 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2183
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efe6fb7ffba
RSP: 002b:00007efe70a25e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007efe70a25ef0 RCX: 00007efe6fb7ffba
RDX: 00000000200058c0 RSI: 0000000020000040 RDI: 00007efe70a25eb0
RBP: 00000000200058c0 R08: 00007efe70a25ef0 R09: 0000000008000000
R10: 0000000008000000 R11: 0000000000000246 R12: 0000000020000040
R13: 00007efe70a25eb0 R14: 00000000000058e5 R15: 00000000200000c0
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-next-20241120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5165 Comm: jbd2/sda1-8 Not tainted 6.12.0-next-20241120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:unwind_next_frame+0x5/0x22d0 arch/x86/kernel/unwind_orc.c:469
Code: 80 e1 07 80 c1 03 38 c1 7c 91 4c 89 f7 e8 03 c3 be 00 eb 87 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fd 49 bc 00
RSP: 0018:ffffc90010046c10 EFLAGS: 00000083
RAX: ffffc90010046d10 RBX: ffffc90010046cb8 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffc90010048000 RDI: ffffc90010046c80
RBP: 1ffff92002008d91 R08: ffffc90010046c01 R09: 0000000000000000
R10: ffffc90010046c80 R11: fffff52002008d9c R12: 1ffff92002008d92
R13: ffffc90010046c90 R14: ffffc90010046c80 R15: ffffc90010046c88
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f57493ef5e8 CR3: 000000002723c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:760
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
 insert_work+0x3e/0x330 kernel/workqueue.c:2183
 __queue_work+0xc8b/0xf50 kernel/workqueue.c:2339
 mod_delayed_work_on+0x153/0x370 kernel/workqueue.c:2588
 kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1108
 blk_insert_flush+0x3fd/0x550 block/blk-flush.c:455
 blk_mq_submit_bio+0xf3f/0x23a0 block/blk-mq.c:3144
 __submit_bio+0x2c6/0x560 block/blk-core.c:629
 __submit_bio_noacct_mq block/blk-core.c:710 [inline]
 submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:739
 journal_submit_commit_record+0x7c8/0xa90 fs/jbd2/commit.c:156
 jbd2_journal_commit_transaction+0x3c22/0x66d0 fs/jbd2/commit.c:877
 kjournald2+0x41c/0x7b0 fs/jbd2/journal.c:201
 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
 </TASK>