INFO: task syz.4.3030:11831 blocked for more than 143 seconds.
Not tainted 6.11.0-rc5-syzkaller-00050-g3ec3f5fc4a91 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.3030 state:D stack:23280 pid:11831 tgid:11829 ppid:5234 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
disable_device+0x170/0x280 drivers/infiniband/core/device.c:1295
__ib_unregister_device+0x2b4/0x470 drivers/infiniband/core/device.c:1493
ib_unregister_device_and_put+0x5a/0x80 drivers/infiniband/core/device.c:1557
nldev_dellink+0x215/0x310 drivers/infiniband/core/nldev.c:1824
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:1331 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2597
___sys_sendmsg+0x135/0x1e0 net/socket.c:2651
__sys_sendmsg+0x117/0x1f0 net/socket.c:2680
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: 0033:0x7f4ede779e79
RSP: 002b:00007f4edf5f3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4ede915f80 RCX: 00007f4ede779e79
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f4ede7e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4ede915f80 R15: 00007fffc7042de8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb5d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb5d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb5d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
1 lock held by klogd/4659:
2 locks held by getty/4972:
#0: ffff8880300680a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5219:
3 locks held by kworker/1:6/5271:
#0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000367fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8ddc14b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
1 lock held by syz-executor/8363:
#0: ffffffff8ddc14b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
2 locks held by syz.4.3030/11831:
#0: ffffffff9522c498 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg+0x16a/0x6e0 drivers/infiniband/core/netlink.c:164
#1: ffff88806592c6b0 (&device->unregistration_lock){+.+.}-{3:3}, at: __ib_unregister_device+0x23b/0x470 drivers/infiniband/core/device.c:1489
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc5-syzkaller-00050-g3ec3f5fc4a91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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+0xf0c/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 UID: 0 PID: 5219 Comm: syz-executor Not tainted 6.11.0-rc5-syzkaller-00050-g3ec3f5fc4a91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:220 [inline]
RIP: 0010:unwind_next_frame+0x2fa/0x23a0 arch/x86/kernel/unwind_orc.c:494
Code: 91 4b 8d 14 76 4c 8d ac 12 64 92 9d 90 83 c0 01 49 81 fd bc 60 5b 91 89 44 24 34 0f 83 08 0a 00 00 e8 1a 94 4d 00 8b 54 24 34 <48> 8d 14 52 48 8d 94 12 64 92 9d 90 48 81 fa bc 60 5b 91 0f 87 e6
RSP: 0018:ffffc9000317f6c0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc9000317f740 RCX: ffffffff813ce13d
RDX: 000000000003055c RSI: ffffffff813ce1f6 RDI: ffffffff915ec7f0
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000000d9cc
R10: 00000000000a4000 R11: 0000000000000000 R12: ffffffff81d9cc00
R13: ffffffff90afb256 R14: 0000000000030553 R15: ffffc9000317f775
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3220fff8 CR3: 000000002c966000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612
vfree+0x181/0x7a0 mm/vmalloc.c:3364
kcov_put kernel/kcov.c:438 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:434
kcov_close+0x10/0x20 kernel/kcov.c:534
__fput+0x408/0xbb0 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xaa3/0x2bb0 kernel/exit.c:882
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x25fd/0x2770 kernel/signal.c:2917
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+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fad9857868a
Code: Unable to access opcode bytes at 0x7fad98578660.
RSP: 002b:00007ffdc0b8a0d8 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fad9857868a
RDX: 00007ffdc0b8a100 RSI: 00007ffdc0b8a190 RDI: 00000000ffffff9c
RBP: 00007ffdc0b8a190 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000286 R12: 00007ffdc0b8b210
R13: 00007fad985e77dc R14: 0000000000095ac3 R15: 00007ffdc0b8b250