INFO: task syz.1.1400:11158 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1400 state:D stack:25592 pid:11158 tgid:11155 ppid:7348 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5520 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7270
__schedule_loop kernel/sched/core.c:7347 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7362
io_schedule+0x8a/0xf0 kernel/sched/core.c:8190
folio_wait_bit_common+0x3c0/0xac0 mm/filemap.c:1329
folio_lock include/linux/pagemap.h:1186 [inline]
migrate_folio_unmap mm/migrate.c:1261 [inline]
migrate_pages_batch+0x81d/0x46f0 mm/migrate.c:1919
migrate_pages_sync+0x4db/0x880 mm/migrate.c:2063
migrate_pages+0x1a83/0x2850 mm/migrate.c:2145
compact_zone+0x2643/0x4640 mm/compaction.c:2698
compact_node+0x17f/0x2c0 mm/compaction.c:2945
compact_nodes mm/compaction.c:2967 [inline]
sysctl_compaction_handler mm/compaction.c:3018 [inline]
sysctl_compaction_handler+0x141/0x210 mm/compaction.c:3005
proc_sys_call_handler+0x47f/0x5a0 fs/proc/proc_sysctl.c:600
iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
do_splice_from fs/splice.c:936 [inline]
direct_splice_actor+0x192/0x690 fs/splice.c:1159
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1228
do_sendfile+0xadc/0xe20 fs/read_write.c:1371
__do_sys_sendfile64 fs/read_write.c:1426 [inline]
__se_sys_sendfile64 fs/read_write.c:1418 [inline]
__x64_sys_sendfile64+0x154/0x220 fs/read_write.c:1418
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe27a39e0d9
RSP: 002b:00007fe27b29b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe27a626090 RCX: 00007fe27a39e0d9
RDX: 00002000000000c0 RSI: 000000000000000b RDI: 000000000000000c
RBP: 00007fe27a435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe27a626128 R14: 00007fe27a626090 R15: 00007ffdf7ad3f28
Showing all locks held in the system:
locks held by ksoftirqd/2/23: 1, last CPU#2:
#0: ffff88806a628418 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:2071 [inline]
#0: ffff88806a628418 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x1b7/0x9c0 kernel/time/hrtimer.c:2124
locks held by khungtaskd/43: 1, last CPU#1:
#0: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6793
locks held by getty/5524: 2, on CPU#2:
#0: ffff88802b8d90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900033732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x14e0 drivers/tty/n_tty.c:2211
locks held by kworker/u32:3/5800: 4, last CPU#0:
#0: ffff88802543b940 ((wq_completion)krds_cp_wq#3/0){+.+.}-{0:0}, at: process_one_work+0x1466/0x1b10 kernel/workqueue.c:3362
#1: ffff88806a424568 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:218 [inline]
#1: ffff88806a424568 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2e0c/0x6920 kernel/sched/core.c:7264
#2: ffff8880001e6a60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#2: ffff8880001e6a60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: inet_shutdown+0x67/0x410 net/ipv4/af_inet.c:913
#3: ffff888113355d60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#3: ffff888113355d60 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect+0x43/0xa0 net/ipv4/af_inet.c:754
locks held by syz.0.15/5915: 2, on CPU#0:
#0: ffff888027cfe460 (sb_writers#12){.+.+}-{0:0}, at: do_pwritev+0x1ac/0x270 fs/read_write.c:1154
#1: ffff888058243c00 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline]
#1: ffff888058243c00 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: v9fs_file_fsync+0x14c/0x1c0 fs/9p/vfs_file.c:427
locks held by udevd/7645: 1, on CPU#1:
#0: ffff88802935d350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:990
locks held by syz.1.1400/11158: 1, on CPU#1:
#0: ffff888035c10460 (sb_writers#3){.+.+}-{0:0}, at: splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 43 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:123
nmi_trigger_cpumask_backtrace+0x21f/0x2a0 lib/nmi_backtrace.c:66
trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0,2-3:
NMI backtrace for cpu 2
CPU: 2 UID: 0 PID: 23 Comm: ksoftirqd/2 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:clockevents_program_event+0x1e8/0x820 kernel/time/clockevents.c:350
Code: ff 31 ff 41 89 c5 89 c6 e8 f5 60 10 00 45 84 ed 74 5f e8 db 66 10 00 48 8b 44 24 70 b9 e0 06 00 00 48 89 c2 48 c1 ea 20 0f 30 <31> db e8 c1 66 10 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00
RSP: 0018:ffffc9000061fba8 EFLAGS: 00000003
RAX: 000000c7dd5373b7 RBX: ffff88806a623d80 RCX: 00000000000006e0
RDX: 00000000000000c7 RSI: ffffffff81fa9af5 RDI: ffff88801f6c8000
RBP: 0000004c5cd28cbf R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff920000c3f7f
R13: 0000000000000001 R14: 0000000000000001 R15: ffff88806a623dc0
FS: 0000000000000000(0000) GS:ffff8880d5da2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a17293c000 CR3: 00000000258f7000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 20000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
tick_program_event+0xa9/0x140 kernel/time/tick-oneshot.c:48
hrtimer_rearm_event kernel/time/hrtimer.c:710 [inline]
__hrtimer_reprogram kernel/time/hrtimer.c:738 [inline]
__hrtimer_reprogram kernel/time/hrtimer.c:713 [inline]
hrtimer_reprogram+0x460/0x6c0 kernel/time/hrtimer.c:902
hrtimer_update_softirq_timer kernel/time/hrtimer.c:1336 [inline]
hrtimer_run_softirq+0x24d/0x360 kernel/time/hrtimer.c:2144
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
run_ksoftirqd kernel/softirq.c:1108 [inline]
run_ksoftirqd+0x38/0x60 kernel/softirq.c:1100
smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5800 Comm: kworker/u32:3 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: krds_cp_wq#3/0 rds_connect_worker
RIP: 0010:check_preemption_disabled+0x1e/0xe0 lib/smp_processor_id.c:54
Code: 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 15 89 e7 c0 08 65 8b 2d 92 e7 c0 08 85 d2 74 0f 48 83 c4 08 <89> e8 5b 5d 41 5c c3 cc cc cc cc 9c 58 f6 c4 02 74 ea 65 4c 8b 25
RSP: 0018:ffffc900000071c0 EFLAGS: 00000096
RAX: 0000000000000001 RBX: ffffffff81c958ce RCX: 0000000000000000
RDX: 0000000000000502 RSI: ffffffff8e3d3fc0 RDI: ffffffff8c615f80
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed100d487ac8
R10: ffff88806a43d643 R11: 0000000000000001 R12: 0000000000000000
R13: ffffc90000007368 R14: ffff888044409464 R15: ffff8880444094a4
FS: 0000000000000000(0000) GS:ffff8880d5ba2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055afdaef6168 CR3: 000000000eb94000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 20000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
lockdep_hardirqs_off+0x92/0xe0 kernel/locking/lockdep.c:4527
trace_hardirqs_off+0x12/0x170 kernel/trace/trace_preemptirq.c:104
__local_bh_enable_ip+0xce/0x120 kernel/softirq.c:455
rt_set_nexthop.isra.0+0x349/0x1240 net/ipv4/route.c:1662
__mkroute_output net/ipv4/route.c:2710 [inline]
ip_route_output_key_hash_rcu+0x94a/0x2870 net/ipv4/route.c:2904
ip_route_output_key_hash+0x118/0x2b0 net/ipv4/route.c:2734
__ip_route_output_key include/net/route.h:169 [inline]
ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2961
inet_csk_route_req+0x766/0xd50 net/ipv4/inet_connection_sock.c:777
tcp_v4_route_req+0x389/0x460 net/ipv4/tcp_ipv4.c:1625
tcp_conn_request+0x10cd/0x2f40 net/ipv4/tcp_input.c:7701
tcp_v4_conn_request net/ipv4/tcp_ipv4.c:1661 [inline]
tcp_v4_conn_request+0xc5/0x2f0 net/ipv4/tcp_ipv4.c:1655
tcp_v6_conn_request+0x34c/0x4f0 net/ipv6/tcp_ipv6.c:1319
tcp_rcv_state_process+0x575/0x7190 net/ipv4/tcp_input.c:7184
tcp_v4_do_rcv+0x691/0x1260 net/ipv4/tcp_ipv4.c:1876
tcp_v4_rcv+0x3e9d/0x4840 net/ipv4/tcp_ipv4.c:2238
ip_protocol_deliver_rcu+0xba/0x4d0 net/ipv4/ip_input.c:207
ip_local_deliver_finish+0x3f2/0x6e0 net/ipv4/ip_input.c:241
NF_HOOK include/linux/netfilter.h:325 [inline]
NF_HOOK include/linux/netfilter.h:319 [inline]
ip_local_deliver+0x19a/0x1f0 net/ipv4/ip_input.c:262
dst_input include/net/dst.h:480 [inline]
ip_rcv_finish net/ipv4/ip_input.c:492 [inline]
NF_HOOK include/linux/netfilter.h:325 [inline]
NF_HOOK include/linux/netfilter.h:319 [inline]
ip_rcv+0x33a/0x3c0 net/ipv4/ip_input.c:612
__netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6264
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6377
process_backlog+0x487/0x1600 net/core/dev.c:6728
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7787
napi_poll net/core/dev.c:7850 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:8007
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
do_softirq kernel/softirq.c:546 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:533
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:914 [inline]
__dev_queue_xmit+0xa27/0x4970 net/core/dev.c:4961
dev_queue_xmit include/linux/netdevice.h:3461 [inline]
neigh_hh_output include/net/neighbour.h:544 [inline]
neigh_output include/net/neighbour.h:558 [inline]
ip_finish_output2+0xf4a/0x2400 net/ipv4/ip_output.c:236
__ip_finish_output.part.0+0x444/0x6f0 net/ipv4/ip_output.c:314
__ip_finish_output net/ipv4/ip_output.c:302 [inline]
ip_finish_output net/ipv4/ip_output.c:324 [inline]
NF_HOOK_COND include/linux/netfilter.h:314 [inline]
ip_output+0x39b/0xc10 net/ipv4/ip_output.c:437
dst_output include/net/dst.h:470 [inline]
ip_local_out+0x193/0x1f0 net/ipv4/ip_output.c:131
__ip_queue_xmit+0x885/0x1f40 net/ipv4/ip_output.c:533
__tcp_transmit_skb+0x3506/0x4f20 net/ipv4/tcp_output.c:1716
tcp_transmit_skb net/ipv4/tcp_output.c:1734 [inline]
tcp_connect+0x37d0/0x55f0 net/ipv4/tcp_output.c:4383
tcp_v4_connect+0x1607/0x1b40 net/ipv4/tcp_ipv4.c:345
__inet_stream_connect+0x208/0xf90 net/ipv4/af_inet.c:684
inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:755
kernel_connect+0x107/0x160 net/socket.c:3755
rds_tcp_conn_path_connect+0x72b/0xaa0 net/rds/tcp_connect.c:205
rds_connect_worker+0x1b4/0x2d0 net/rds/threads.c:176
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
process_scheduled_works kernel/workqueue.c:3470 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
NMI backtrace for cpu 3
CPU: 3 UID: 0 PID: 5116 Comm: syslogd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0xe/0xc0 kernel/rcu/tree.c:752
Code: 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 48 ff 05 3a 13 99 12 8d 2c d8 09 48 c7 c3 68 1c 89 94 89 c5 83 f8 07 0f 87 83 00 00
RSP: 0018:ffffc9000614f5b0 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffc9000614fe78 RCX: ffffffff91f66901
RDX: ffffc9000614fe80 RSI: ffffc9000614fe48 RDI: ffffc9000614f648
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000001921e R12: ffffc9000614f688
R13: ffffc9000614f638 R14: ffffc9000614fe78 R15: ffffc9000614f66c
FS: 00007f48c8413c80(0000) GS:ffff8880d5ea2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc3e4ca708 CR3: 0000000026146000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 20000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0x745/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2678 [inline]
slab_free mm/slub.c:6372 [inline]
kmem_cache_free+0x127/0x6b0 mm/slub.c:6499
kfree_skbmem+0x19a/0x210 net/core/skbuff.c:1145
__kfree_skb net/core/skbuff.c:1212 [inline]
consume_skb net/core/skbuff.c:1445 [inline]
consume_skb+0xd1/0x110 net/core/skbuff.c:1439
__unix_dgram_recvmsg+0x754/0xc30 net/unix/af_unix.c:2672
unix_dgram_recvmsg+0xcd/0x100 net/unix/af_unix.c:2689
sock_recvmsg_nosec net/socket.c:1151 [inline]
sock_recvmsg+0x1d5/0x220 net/socket.c:1173
sock_read_iter+0x2b0/0x3a0 net/socket.c:1242
new_sync_read fs/read_write.c:493 [inline]
vfs_read+0x960/0xb40 fs/read_write.c:574
ksys_read+0x1f8/0x250 fs/read_write.c:716
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48c8563407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffea866cbe0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f48c8413c80 RCX: 00007f48c8563407
RDX: 00000000000000ff RSI: 000055b814488300 RDI: 0000000000000000
RBP: 000055b8144882c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055b81448835c
R13: 0000000000000000 R14: 000055b814488300 R15: 000055b7e5486d98