INFO: task syz.3.614:8064 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.614 state:D stack:27168 pid:8064 tgid:8064 ppid:7717 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
request_wait_answer+0x4f8/0x900 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x511/0xd20 fs/fuse/dev.c:513
fuse_flush+0x4f3/0x6d0 fs/fuse/file.c:542
filp_flush+0xbd/0x1a0 fs/open.c:1523
filp_close+0x1c/0x30 fs/open.c:1536
__range_close fs/file.c:722 [inline]
__close_range+0x3e5/0x9b0 fs/file.c:791
__do_sys_close_range fs/open.c:1589 [inline]
__se_sys_close_range fs/open.c:1586 [inline]
__x64_sys_close_range+0x72/0xb0 fs/open.c:1586
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f601b375bd9
RSP: 002b:00007ffefa422578 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f601b505a60 RCX: 00007f601b375bd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f601b505a60 R08: 0000000000000006 R09: 0000001dfa42289f
R10: 00000000005dbf30 R11: 0000000000000246 R12: 000000000007f02f
R13: 0000000000000032 R14: 00007f601b505a60 R15: 00007ffefa422660
INFO: task syz.3.614:8068 blocked for more than 144 seconds.
Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.614 state:D stack:26800 pid:8068 tgid:8064 ppid:7717 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
request_wait_answer+0x4f8/0x900 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x511/0xd20 fs/fuse/dev.c:513
fuse_do_getattr+0x268/0x520 fs/fuse/dir.c:1271
fuse_update_get_attr+0x54c/0x630 fs/fuse/dir.c:1328
fuse_cache_read_iter fs/fuse/file.c:1042 [inline]
fuse_file_read_iter+0x351/0x480 fs/fuse/file.c:1705
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x869/0xbd0 fs/read_write.c:476
ksys_read+0x12f/0x260 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f601b375bd9
RSP: 002b:00007f601c09a048 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f601b504038 RCX: 00007f601b375bd9
RDX: 0000000800000000 RSI: 0000000020012400 RDI: 000000000000000a
RBP: 00007f601b3e4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f601b504038 R15: 00007ffefa422498
Showing all locks held in the system:
3 locks held by kworker/0:1/9:
#0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1: ffffc900000e7d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
1 lock held by khungtaskd/30:
#0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8dbb1620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:4/63:
4 locks held by kworker/u8:7/2448:
#0: ffff8880162d3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1: ffffc90009157d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2: ffffffff8f732e90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594
#3: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:173 [inline]
#3: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x24/0x130 net/sched/act_gate.c:659
3 locks held by kworker/u8:9/2825:
#0: ffff888029dcc948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1: ffffc90009607d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733
4 locks held by udevd/4534:
#0: ffff8880291b3540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff88804e379c88 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888066cc4c38 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88807a7090e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88807a7090e8 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
2 locks held by dhcpcd/4747:
#0: ffffffff8f71e968 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a8/0x6c0 net/socket.c:1303
#1: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553
2 locks held by getty/4845:
#0: ffff88802a5c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by syz.2.459/7310:
1 lock held by syz.3.523/7654:
1 lock held by syz.4.572/7854:
1 lock held by syz.3.614/8068:
#0: ffff88802d019748 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1191
4 locks held by syz-executor/8407:
#0: ffff88802f732420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1: ffff88801d765888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff888021f2c4b8 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3: ffffffff8ed831a8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
7 locks held by syz-executor/8408:
#0: ffff88802f732420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1: ffff88802e873488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff888021f2c3c8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3: ffffffff8ed831a8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x187/0x730 drivers/net/netdevsim/bus.c:166
#4: ffff88807a7090e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff88807a7090e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#5: ffff88807a70c250 (&devlink->lock_key#27){+.+.}-{3:3}, at: nsim_drv_probe+0xd5/0x1490 drivers/net/netdevsim/dev.c:1534
#6: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: nsim_init_netdevsim drivers/net/netdevsim/netdev.c:678 [inline]
#6: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: nsim_create+0x4c9/0xb20 drivers/net/netdevsim/netdev.c:750
2 locks held by syz-executor/8419:
#0: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
#1: ffffffff8dbbcdb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:323
1 lock held by syz-executor/8452:
#0: ffffffff8dbbcdb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:291
1 lock held by syz-executor/8476:
#0: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f748128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8452 Comm: syz-executor Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:mark_lock+0x130/0xc60 kernel/locking/lockdep.c:4697
Code: 00 00 00 48 8b 84 24 08 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 4c 09 00 00 48 8d 65 d8 89 d0 5b 41 5c 41 5d 41 5e 41 5f 5d cc cc cc cc 48 8d 7e 22 48 89 f8 48 c1 e8 03 0f b6 04 10 48 89
RSP: 0018:ffffc90003f77710 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff284ce21
RDX: 0000000000000001 RSI: 0000000000000200 RDI: ffffffff94267108
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff284ca58
R10: ffffffff942652c7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88802a6028e0 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055898a2a5d10 CR3: 000000002d39c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4599 [inline]
__lock_acquire+0x992/0x3b30 kernel/locking/lockdep.c:5091
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
page_ext_get+0x3a/0x310 mm/page_ext.c:521
__reset_page_owner+0x32/0x400 mm/page_owner.c:290
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1093 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2588
vfree+0x181/0x7a0 mm/vmalloc.c:3355
kcov_put kernel/kcov.c:429 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:425
kcov_close+0x10/0x20 kernel/kcov.c:525
__fput+0x408/0xbb0 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa9b/0x2ba0 kernel/exit.c:876
do_group_exit+0xd3/0x2a0 kernel/exit.c:1025
get_signal+0x2616/0x2710 kernel/signal.c:2909
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f822f77796c
Code: Unable to access opcode bytes at 0x7f822f777942.
RSP: 002b:00007fff34e75af0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: 0000000000000068 RBX: 00007f8230434620 RCX: 00007f822f77796c
RDX: 0000000000000068 RSI: 00007f8230434670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff34e75b44 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f8230434670 R15: 0000000000000000