INFO: task syz-executor.4:5755 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29264 pid:5755 tgid:5745 ppid:5088 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
do_linkat+0x141/0x600 fs/namei.c:4656
__do_sys_link fs/namei.c:4710 [inline]
__se_sys_link fs/namei.c:4708 [inline]
__x64_sys_link+0x81/0xa0 fs/namei.c:4708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09b707dea9
RSP: 002b:00007f09b6bde0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f09b71ac050 RCX: 00007f09b707dea9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00007f09b70ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f09b71ac050 R15: 00007ffc3784cd88
Showing all locks held in the system:
2 locks held by kworker/u8:0/10:
#0: ffff88801a343148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900000f7d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
3 locks held by kworker/1:0/24:
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900001e7d80 ((work_completion)(&smcibdev->port_event_work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff8880543d1160 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x5d/0x200 drivers/infiniband/sw/rxe/rxe_verbs.c:54
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:8/2816:
2 locks held by getty/4829:
#0: ffff88802a94f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/1:4/5142:
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90003957d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffffffff8f301a08 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
4 locks held by kworker/1:5/5144:
#0: ffff88801ce9c148 ((wq_completion)infiniband){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90003937d80 ((work_completion)(&work->work)#2){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff8880543d1160 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x5d/0x200 drivers/infiniband/sw/rxe/rxe_verbs.c:54
#3: ffffffff8f301a08 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0x118/0xb50 drivers/infiniband/core/verbs.c:1983
1 lock held by syz-executor.4/5747:
1 lock held by syz-executor.4/5755:
#0: ffff88805c51c188 (&type->i_mutex_dir_key#12){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805c51c188 (&type->i_mutex_dir_key#12){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805c51c188 (&type->i_mutex_dir_key#12){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.3/6658:
6 locks held by syz-executor.2/7511:
#0: ffffffff949d4e98 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg+0x16a/0x6e0 drivers/infiniband/core/netlink.c:164
#1: ffffffff8efbb230 (link_ops_rwsem){++++}-{3:3}, at: nldev_newlink+0x2db/0x670 drivers/infiniband/core/nldev.c:1753
#2: ffffffff8efa7a30 (devices_rwsem){++++}-{3:3}, at: enable_device_and_get+0x104/0x3f0 drivers/infiniband/core/device.c:1322
#3: ffffffff8efa77b0 (rdma_nets_rwsem){++++}-{3:3}, at: add_compat_devs drivers/infiniband/core/device.c:1025 [inline]
#3: ffffffff8efa77b0 (rdma_nets_rwsem){++++}-{3:3}, at: enable_device_and_get+0x2cd/0x3f0 drivers/infiniband/core/device.c:1338
#4: ffff8880543d0f30 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0x112/0x720 drivers/infiniband/core/device.c:943
#5: ffff8880543d1160 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x5d/0x200 drivers/infiniband/sw/rxe/rxe_verbs.c:54
2 locks held by syz-executor.1/7519:
#0: ffffffff8f301a08 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f301a08 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x250 drivers/net/tun.c:3500
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.0/7528:
3 locks held by syz-executor.3/7531:
#0: ffff888071e5d010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
#0: ffff888071e5d010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x270 net/socket.c:658
#1: ffff888019eeb258 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline]
#1: ffff888019eeb258 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pptp_release+0x53/0x280 drivers/net/ppp/pptp.c:508
#2: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7511 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:radix_tree_descend lib/radix-tree.c:89 [inline]
RIP: 0010:idr_get_free+0x2dc/0xa40 lib/radix-tree.c:1518
Code: d5 da 0e 00 e8 45 b1 c1 f6 4c 8b 6c 24 08 89 d9 49 d3 ed 41 83 e5 3f 45 89 ef 4b 8d 7c fc 28 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 e8 05 00 00 49 8d 47 04 be 08 00 00 00 4d 8b 74 c4 08 49 8d
RSP: 0018:ffffc90003426740 EFLAGS: 00000246
RAX: 1ffff11009939248 RBX: 0000000000000006 RCX: 0000000000000006
RDX: ffff888084139e00 RSI: ffffffff8acc110b RDI: ffff88804c9c9240
RBP: dffffc0000000000 R08: 0000000000000001 R09: 000000000000003f
R10: 0000000000000006 R11: 0000000000000006 R12: ffff88804c9c9080
R13: 0000000000000033 R14: 1ffff11009939210 R15: 0000000000000033
FS: 00007fd7807de6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c03f79198 CR3: 000000002cf88000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
idr_alloc_u32+0x191/0x2f0 lib/idr.c:46
idr_alloc_cyclic+0x10c/0x230 lib/idr.c:125
__kernfs_new_node+0x11b/0x890 fs/kernfs/dir.c:630
kernfs_new_node+0x186/0x240 fs/kernfs/dir.c:700
__kernfs_create_file+0x53/0x350 fs/kernfs/file.c:1034
sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
create_files fs/sysfs/group.c:76 [inline]
internal_create_group+0x565/0xe50 fs/sysfs/group.c:180
internal_create_groups+0x9d/0x150 fs/sysfs/group.c:220
setup_port+0x405/0x1720 drivers/infiniband/core/sysfs.c:1258
ib_setup_port_attrs+0x207/0x5d0 drivers/infiniband/core/sysfs.c:1444
add_one_compat_dev+0x4c5/0x720 drivers/infiniband/core/device.c:969
add_compat_devs drivers/infiniband/core/device.c:1027 [inline]
enable_device_and_get+0x338/0x3f0 drivers/infiniband/core/device.c:1338
ib_register_device drivers/infiniband/core/device.c:1420 [inline]
ib_register_device+0x880/0xbf0 drivers/infiniband/core/device.c:1366
rxe_register_device+0x2fc/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:1524
rxe_net_add+0x86/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:534
rxe_newlink+0x70/0x190 drivers/infiniband/sw/rxe/rxe.c:197
nldev_newlink+0x396/0x670 drivers/infiniband/core/nldev.c:1763
rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2584
___sys_sendmsg+0x135/0x1e0 net/socket.c:2638
__sys_sendmsg+0x117/0x1f0 net/socket.c:2667
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd780c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd7807de0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd780dac050 RCX: 00007fd780c7dea9
RDX: 0000000000000000 RSI: 0000000020001940 RDI: 0000000000000005
RBP: 00007fd780cca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd780dac050 R15: 00007ffed96758e8
vkms_vblank_simulate: vblank timer overrun