INFO: task syz-executor.2:10805 blocked for more than 143 seconds.
Not tainted 5.15.152-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:22560 pid:10805 ppid: 6230 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x2ce/0x370 fs/fs-writeback.c:2684
try_to_writeback_inodes_sb+0x94/0xb0 fs/fs-writeback.c:2732
ext4_nonda_switch fs/ext4/inode.c:2933 [inline]
ext4_da_write_begin+0x228/0xb60 fs/ext4/inode.c:2960
generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785
ext4_buffered_write_iter+0x227/0x360 fs/ext4/file.c:268
ext4_file_write_iter+0x87c/0x1990
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f324754ddb1
RSP: 002b:00000000200002e0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f324767bf80 RCX: 00007f324754dda9
RDX: 0000000020000300 RSI: 00000000200002e0 RDI: 0000000000080000
RBP: 00007f324759a47a R08: 0000000020000380 R09: 0000000020000380
R10: 0000000020000340 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f324767bf80 R15: 00007ffcb7a56828
Showing all locks held in the system:
3 locks held by kworker/1:0/21:
#0: ffff888011c71938 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90000db7d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7f/0xb70 net/wireless/reg.c:2436
1 lock held by khungtaskd/26:
#0: ffffffff8c91f720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:2/154:
3 locks held by kworker/0:3/1281:
#0: ffff888011c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900054afd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
2 locks held by getty/3258:
#0: ffff888024fbe098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc9000209b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
3 locks held by kworker/1:4/3561:
#0: ffff8880244c2138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90003167d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcc/0x1720 net/ipv6/addrconf.c:4111
2 locks held by kworker/0:6/3564:
#0: ffff888011c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900031a7d20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
2 locks held by kworker/u4:7/4792:
5 locks held by kworker/u4:8/6570:
#0: ffff888011dcd138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900050cfd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9cfe50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:558
#3: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11576 [inline]
#3: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x1ac/0x3f0 net/core/dev.c:11614
#4: ffffffff8c923ce8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#4: ffffffff8c923ce8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
3 locks held by kworker/0:9/8728:
#0: ffff888011c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900048d7d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by syz-executor.2/10805:
#0: ffff88814aec8460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825
#1: ffff88805d10e7a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
#1: ffff88805d10e7a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa0/0x360 fs/ext4/file.c:262
#2: ffff88814aec80e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1d/0xb0 fs/fs-writeback.c:2729
2 locks held by syz-executor.4/11107:
1 lock held by syz-executor.1/11112:
1 lock held by syz-executor.4/11116:
2 locks held by syz-executor.1/11120:
2 locks held by syz-executor.4/11124:
1 lock held by syz-executor.1/11128:
2 locks held by syz-executor.4/11140:
3 locks held by syz-executor.1/11143:
2 locks held by syz-executor.4/11148:
2 locks held by syz-executor.4/11167:
3 locks held by syz-executor.3/11171:
2 locks held by syz-executor.3/11181:
1 lock held by syz-executor.1/11182:
1 lock held by syz-executor.3/11186:
2 locks held by syz-executor.3/11193:
2 locks held by syz-executor.3/11202:
3 locks held by syz-executor.1/11208:
1 lock held by syz-executor.0/11511:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
1 lock held by syz-executor.1/11514:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
2 locks held by syz-executor.4/11542:
#0: ffffffff8d9cfe50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
#1: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x1d0 drivers/net/wireguard/device.c:404
2 locks held by syz-executor.2/11545:
#0: ffffffff8d9cfe50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
#1: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x1d0 drivers/net/wireguard/device.c:404
2 locks held by syz-executor.3/11547:
#0: ffffffff8d9cfe50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
#1: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20f/0x700 net/ipv4/ip_tunnel.c:1083
1 lock held by syz-executor.0/11552:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
1 lock held by syz-executor.1/11556:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
1 lock held by syz-executor.4/11567:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
1 lock held by syz-executor.2/11570:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
1 lock held by syz-executor.3/11572:
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dba08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5626
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11182 Comm: syz-executor.1 Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5363 [inline]
RIP: 0010:lock_is_held_type+0xa8/0x180 kernel/locking/lockdep.c:5666
Code: 83 bd e8 0a 00 00 00 7e 47 4c 89 ed 48 81 c5 f0 0a 00 00 31 db 48 83 fb 31 73 24 48 89 ef 4c 89 fe e8 fc 01 00 00 85 c0 75 2a <48> ff c3 49 63 85 e8 0a 00 00 48 83 c5 28 48 39 c3 7c d8 eb 11 48
RSP: 0018:ffffc90005c15f88 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000005 RSI: ffff8880b9a3a318 RDI: ffff88807a6e28d8
RBP: ffff88807a6e28d8 R08: dffffc0000000000 R09: fffffbfff1bc71b6
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046
R13: ffff88807a6e1dc0 R14: 00000000ffffffff R15: ffff8880b9a3a318
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563ef621c030 CR3: 0000000022fde000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:287 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1317 [inline]
rq_clock_pelt kernel/sched/pelt.h:137 [inline]
cfs_rq_clock_pelt kernel/sched/pelt.h:150 [inline]
update_load_avg+0xdc/0x1110 kernel/sched/fair.c:3869
enqueue_entity+0x118/0x1ec0 kernel/sched/fair.c:4496
enqueue_task_fair+0x245/0x1710 kernel/sched/fair.c:5813
enqueue_task+0x181/0x3a0 kernel/sched/core.c:1977
activate_task+0x4d/0xa0 kernel/sched/core.c:2005
attach_task+0xf2/0x180 kernel/sched/fair.c:8289
attach_tasks kernel/sched/fair.c:8324 [inline]
load_balance+0x57d8/0x7c60 kernel/sched/fair.c:10250
newidle_balance+0x4d4/0xef0 kernel/sched/fair.c:11212
pick_next_task_fair+0x27d/0x9c0 kernel/sched/fair.c:7608
__pick_next_task kernel/sched/core.c:5650 [inline]
pick_next_task kernel/sched/core.c:5758 [inline]
__schedule+0x86d/0x45b0 kernel/sched/core.c:6340
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
add_transaction_credits+0x85c/0xc00 fs/jbd2/transaction.c:316
start_this_handle+0x747/0x1570 fs/jbd2/transaction.c:423
jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:521
__ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_writepages+0x114f/0x3d10 fs/ext4/inode.c:2800
do_writepages+0x481/0x730 mm/page-writeback.c:2364
filemap_fdatawrite_wbc+0x1d6/0x230 mm/filemap.c:400
__filemap_fdatawrite_range mm/filemap.c:433 [inline]
__filemap_fdatawrite mm/filemap.c:439 [inline]
filemap_flush+0x10c/0x150 mm/filemap.c:466
ext4_release_file+0x7d/0x300 fs/ext4/file.c:141
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x6a3/0x2480 kernel/exit.c:872
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:314
exc_general_protection+0x358/0x4f0 arch/x86/kernel/traps.c:562
asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7f0fc432fdb1
Code: Unable to access opcode bytes at RIP 0x7f0fc432fd87.
RSP: 002b:00000000200002e0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0fc445df80 RCX: 00007f0fc432fda9
RDX: 0000000020000300 RSI: 00000000200002e0 RDI: 0000000000080000
RBP: 00007f0fc437c47a R08: 0000000020000380 R09: 0000000020000380
R10: 0000000020000340 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0fc445df80 R15: 00007ffd9a4ee428