INFO: task kworker/u4:9:9261 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:9 state:D stack:26320 pid:9261 ppid:2 flags:0x00004000
Workqueue: loop5 loop_rootcg_workfn
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1a0 kernel/sched/core.c:6695
io_schedule+0xbe/0x130 kernel/sched/core.c:8881
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1299
__folio_lock mm/filemap.c:1662 [inline]
folio_lock include/linux/pagemap.h:950 [inline]
folio_lock include/linux/pagemap.h:946 [inline]
__filemap_get_folio+0xbab/0xdc0 mm/filemap.c:1934
shmem_get_folio_gfp+0x422/0x1950 mm/shmem.c:1877
shmem_get_folio mm/shmem.c:2068 [inline]
shmem_write_begin+0x14a/0x380 mm/shmem.c:2561
generic_perform_write+0x256/0x570 mm/filemap.c:3770
__generic_file_write_iter+0x2ae/0x500 mm/filemap.c:3898
generic_file_write_iter+0xe3/0x350 mm/filemap.c:3930
call_write_iter include/linux/fs.h:1851 [inline]
do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
do_iter_write+0x182/0x700 fs/read_write.c:861
vfs_iter_write+0x74/0xa0 fs/read_write.c:902
lo_write_bvec drivers/block/loop.c:249 [inline]
lo_write_simple drivers/block/loop.c:271 [inline]
do_req_filebacked drivers/block/loop.c:495 [inline]
loop_handle_cmd drivers/block/loop.c:1873 [inline]
loop_process_work+0xdac/0x20e0 drivers/block/loop.c:1908
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.5:409 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28248 pid:409 ppid:5139 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1a0 kernel/sched/core.c:6695
io_schedule+0xbe/0x130 kernel/sched/core.c:8881
migration_entry_wait_on_locked+0x7c9/0xc50 mm/filemap.c:1426
__migration_entry_wait+0x179/0x1a0 mm/migrate.c:317
do_swap_page+0x27aa/0x36b0 mm/memory.c:3691
handle_pte_fault mm/memory.c:4914 [inline]
__handle_mm_fault+0x1623/0x3e60 mm/memory.c:5052
handle_mm_fault+0x1b6/0x850 mm/memory.c:5198
do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f1f870393f5
RSP: 002b:00007ffd216a8f90 EFLAGS: 00010206
RAX: 0000000041748ac6 RBX: 00007f1f871ac0e8 RCX: 0000001b2bd20000
RDX: ffffffff81ddc3ac RSI: 0000001b2bd26cb8 RDI: 0000000000000022
RBP: 0000000041748ac6 R08: 0000000000000ac6 R09: 0000000041748aca
R10: 00007ffd216a9150 R11: 0000000000000246 R12: 00007f1f871a0000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff81ddc3ac
INFO: task syz-executor.2:437 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25624 pid:437 ppid:5136 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1a0 kernel/sched/core.c:6695
io_schedule+0xbe/0x130 kernel/sched/core.c:8881
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1299
folio_wait_writeback+0x3c/0xa0 mm/page-writeback.c:3127
migrate_folio_unmap mm/migrate.c:1189 [inline]
migrate_pages_batch+0x1468/0x3620 mm/migrate.c:1674
migrate_pages+0x1b73/0x2300 mm/migrate.c:1961
compact_zone+0x1cc1/0x3ac0 mm/compaction.c:2412
compact_node+0x12a/0x1c0 mm/compaction.c:2696
compact_nodes mm/compaction.c:2709 [inline]
sysctl_compaction_handler+0x9f/0xf0 mm/compaction.c:2753
proc_sys_call_handler+0x49c/0x6d0 fs/proc/proc_sysctl.c:604
call_write_iter include/linux/fs.h:1851 [inline]
do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
do_iter_write+0x182/0x700 fs/read_write.c:861
vfs_iter_write+0x74/0xa0 fs/read_write.c:902
iter_file_splice_write+0x745/0xc90 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0x114/0x180 fs/splice.c:931
splice_direct_to_actor+0x335/0x8a0 fs/splice.c:886
do_splice_direct+0x1ab/0x280 fs/splice.c:974
do_sendfile+0xb19/0x12c0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64 fs/read_write.c:1309 [inline]
__x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fce6148c0c9
RSP: 002b:00007fce621fd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fce615abf80 RCX: 00007fce6148c0c9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007fce614e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe7df4f05f R14: 00007fce621fd300 R15: 0000000000022000
INFO: task segctord:451 blocked for more than 144 seconds.
Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:segctord state:D stack:26688 pid:451 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5301 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6619
schedule+0xde/0x1a0 kernel/sched/core.c:6695
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
nilfs_segbuf_wait fs/nilfs2/segbuf.c:459 [inline]
nilfs_wait_on_logs+0xbc/0x2c0 fs/nilfs2/segbuf.c:301
nilfs_segctor_wait fs/nilfs2/segment.c:1929 [inline]
nilfs_segctor_do_construct+0x3c99/0x7100 fs/nilfs2/segment.c:2094
nilfs_segctor_construct+0x8e3/0xb30 fs/nilfs2/segment.c:2381
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2489 [inline]
nilfs_segctor_thread+0x3c7/0xf30 fs/nilfs2/segment.c:2572
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c793cb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7939b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8c794880 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x2d4 kernel/locking/lockdep.c:6544
1 lock held by klogd/4433:
#0: ffff8880b983c258 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:539
2 locks held by getty/4759:
#0: ffff88802bdc3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
4 locks held by kworker/u4:9/9261:
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888024703138 ((wq_completion)loop5){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2361
#1: ffffc900050cfda8 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2365
#2: ffff8880125fe460 (sb_writers#5){.+.+}-{0:0}, at: process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
#3: ffff8880681b5a78 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#3: ffff8880681b5a78 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: generic_file_write_iter+0x92/0x350 mm/filemap.c:3927
2 locks held by kworker/u4:13/9319:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2361
#1: ffffc9000585fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2365
6 locks held by kworker/u4:4/22515:
2 locks held by kworker/u4:14/22516:
1 lock held by syz-executor.5/409:
#0: ffff88807d823798 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807d823798 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1348
1 lock held by syz-executor.2/437:
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1323 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1309 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
1 lock held by segctord/451:
#0: ffff88807b1442a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x266/0x410 fs/nilfs2/segment.c:357
1 lock held by syz-executor.4/467:
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1323 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1309 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
1 lock held by syz-executor.2/539:
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1323 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1309 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
1 lock held by syz-executor.2/665:
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1323 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1309 [inline]
#0: ffff888027906460 (sb_writers#3){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 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+0xcae/0x1050 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 22515 Comm: kworker/u4:4 Not tainted 6.2.0-rc5-next-20230123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: bat_events batadv_purge_orig
RIP: 0010:__lock_acquire+0xb5a/0x5780 kernel/locking/lockdep.c:5068
Code: e7 a0 08 85 c0 74 c8 4c 8b 64 24 70 44 8b 7c 24 78 48 c7 c2 e8 5a 74 8e 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> c7 c0 e8 5a 74 8e 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 eb
RSP: 0018:ffffc9000acaf988 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: 434795b3e9c45454 RCX: ffffffff81640d12
RDX: 0000000000000000 RSI: 0000000034795b34 RDI: ffff888098c60aa9
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff9135fc5f
R10: fffffbfff226bf8b R11: 0000000000000000 R12: ffff888098c60a88
R13: ffff888098c60000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ee1d6a8600 CR3: 0000000026c48000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11c/0x350 kernel/locking/lockdep.c:5690
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:355 [inline]
batadv_purge_orig_ref+0x17a/0x1590 net/batman-adv/originator.c:1243
batadv_purge_orig+0x1b/0x60 net/batman-adv/originator.c:1272
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308