INFO: task syz-executor.0:8245 blocked for more than 143 seconds.
Not tainted 6.8.0-rc3-syzkaller-00047-g047371968ffc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25424 pid:8245 tgid:8233 ppid:5100 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x110 kernel/sched/core.c:9023
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1274
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3061
migrate_folio_unmap mm/migrate.c:1186 [inline]
migrate_pages_batch+0xd97/0x3570 mm/migrate.c:1675
migrate_pages_sync mm/migrate.c:1868 [inline]
migrate_pages+0x2523/0x3320 mm/migrate.c:1950
do_mbind mm/mempolicy.c:1344 [inline]
kernel_mbind mm/mempolicy.c:1486 [inline]
__do_sys_mbind mm/mempolicy.c:1560 [inline]
__se_sys_mbind+0x11f5/0x1a70 mm/mempolicy.c:1556
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fdac0a7dda9
RSP: 002b:00007fdac18240c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007fdac0bac050 RCX: 00007fdac0a7dda9
RDX: 0000000000000000 RSI: 0000000000800026 RDI: 0000000020001000
RBP: 00007fdac0aca47a R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fdac0bac050 R15: 00007ffea04680c8
INFO: task syz-executor.0:8247 blocked for more than 144 seconds.
Not tainted 6.8.0-rc3-syzkaller-00047-g047371968ffc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27384 pid:8247 tgid:8233 ppid:5100 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x703/0xa40 kernel/locking/rwsem.c:1528
nilfs_transaction_begin+0x31f/0x6e0 fs/nilfs2/segment.c:223
nilfs_setattr+0x11b/0x2c0 fs/nilfs2/inode.c:983
notify_change+0xb9f/0xe70 fs/attr.c:499
do_truncate+0x220/0x310 fs/open.c:66
handle_truncate fs/namei.c:3299 [inline]
do_open fs/namei.c:3645 [inline]
path_openat+0x29fd/0x3240 fs/namei.c:3798
do_filp_open+0x234/0x490 fs/namei.c:3825
do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1430
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fdac0a7dda9
RSP: 002b:00007fdac18030c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fdac0bac120 RCX: 00007fdac0a7dda9
RDX: 000000000000275a RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007fdac0aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fdac0bac120 R15: 00007ffea04680c8
INFO: task segctord:8240 blocked for more than 144 seconds.
Not tainted 6.8.0-rc3-syzkaller-00047-g047371968ffc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:segctord state:D stack:26000 pid:8240 tgid:8240 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x110 kernel/sched/core.c:9023
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1274
nilfs_lookup_dirty_data_buffers+0x242/0x840 fs/nilfs2/segment.c:727
nilfs_segctor_scan_file+0x23d/0xa10 fs/nilfs2/segment.c:1084
nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1206 [inline]
nilfs_segctor_collect fs/nilfs2/segment.c:1533 [inline]
nilfs_segctor_do_construct+0x1c74/0x6e50 fs/nilfs2/segment.c:2082
nilfs_segctor_construct+0x14d/0x930 fs/nilfs2/segment.c:2416
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2524 [inline]
nilfs_segctor_thread+0x53f/0x1150 fs/nilfs2/segment.c:2608
kthread+0x2f1/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Showing all locks held in the system:
1 lock held by ksoftirqd/0/16:
#0: ffff8880b943c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
1 lock held by khungtaskd/29:
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4818:
#0: ffff88802b93e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/u4:8/27738:
#0: ffff8880162e4d38 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff8880162e4d38 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90015a4fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90015a4fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8e136340 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4064
3 locks held by kworker/0:3/29574:
#0: ffff888014c88d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c88d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90014d77d20 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90014d77d20 (fqdir_free_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8e136340 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4064
4 locks held by syz-executor.0/8247:
#0: ffff888023d1a420 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88808c8fe2c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff88808c8fe2c0 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:64
#2: ffff888023d1a610 (sb_internal#2){.+.+}-{0:0}, at: nilfs_setattr+0x11b/0x2c0 fs/nilfs2/inode.c:983
#3: ffff88802d2502a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_begin+0x31f/0x6e0 fs/nilfs2/segment.c:223
1 lock held by segctord/8240:
#0: ffff88802d2502a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x25c/0x4f0 fs/nilfs2/segment.c:357
2 locks held by syz-executor.4/13404:
#0: ffffffff8f368a10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491
#1: ffffffff8e136340 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4064
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00047-g047371968ffc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2f1/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4505 Comm: klogd Not tainted 6.8.0-rc3-syzkaller-00047-g047371968ffc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_preemption_disabled+0x60/0x120 lib/smp_processor_id.c:19
Code: 00 48 3b 44 24 08 0f 85 cd 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f e9 5c e3 0a 00 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 c5 49 89 f6 49 89 ff 65 4c 8b 25 19 43 9d
RSP: 0018:ffffc9000314f6c0 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: ffff888070fd5940
RDX: 0000000000000000 RSI: ffffffff8baac760 RDI: ffffffff8bfe6820
RBP: ffffc9000314f860 R08: ffffffff81df4720 R09: 1ffffd40004096c0
R10: dffffc0000000000 R11: fffff940004096c1 R12: 0000000000000246
R13: ffff888070fd5940 R14: 00000000ffffffff R15: ffffffff8e130a60
FS: 00007f1e2e006380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056416c181680 CR3: 000000002e084000 CR4: 0000000000350ef0
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_is_held_type+0x100/0x190 kernel/locking/lockdep.c:5826
lock_is_held include/linux/lockdep.h:231 [inline]
__might_resched+0xf4/0x780 kernel/sched/core.c:10138
__might_fault+0x71/0x120 mm/memory.c:6057
_copy_from_iter+0x108/0x1d40 lib/iov_iter.c:278
copy_from_iter include/linux/uio.h:205 [inline]
skb_copy_datagram_from_iter+0xf3/0x6c0 net/core/datagram.c:572
unix_dgram_sendmsg+0x992/0x2200 net/unix/af_unix.c:1985
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x223/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2199
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f1e2e1689b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff7ee717f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1e2e1689b5
RDX: 000000000000005c RSI: 000056279d118590 RDI: 0000000000000003
RBP: 000056279d110910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f1e2e2f6212 R14: 00007fff7ee718f8 R15: 0000000000000000