bisecting fixing commit since c7d102232649226a69dddd58a4942cf13cff4f7c
building syzkaller on 6c236867ce33c0c16b102e02a08226d7eb9b2046
testing commit c7d102232649226a69dddd58a4942cf13cff4f7c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 3b78dda367e897f317f26e1057bdf850e34bc92a15f820e4da5bc9edb52d6ad0
all runs: crashed: INFO: task hung in synchronize_rcu
testing current HEAD 7d18a07897d07495ee140dd319b0e9265c0f68ba
testing commit 7d18a07897d07495ee140dd319b0e9265c0f68ba
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 06d3acb246a82c2cd0e0231ff00e6dea0166fbf414eaa8625a432ac47614192a
run #0: crashed: INFO: task hung in synchronize_rcu
run #1: crashed: INFO: task hung in synchronize_rcu
run #2: crashed: INFO: task hung in synchronize_rcu
run #3: crashed: INFO: task hung in synchronize_rcu
run #4: crashed: INFO: task hung in synchronize_rcu
run #5: crashed: INFO: task hung in synchronize_rcu
run #6: crashed: INFO: task hung in synchronize_rcu
run #7: crashed: INFO: task hung in synchronize_rcu
run #8: crashed: INFO: task hung in synchronize_rcu
run #9: crashed: INFO: task hung in __lru_add_drain_all
revisions tested: 2, total time: 28m40.587039787s (build: 12m41.686331054s, test: 15m22.598689433s)
the crash still happens on HEAD
commit msg: sch_qfq: prevent shift-out-of-bounds in qfq_init_qdisc
crash: INFO: task hung in __lru_add_drain_all
INFO: task khugepaged:32 blocked for more than 143 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:23984 pid: 32 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26e0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x48b/0xa30 kernel/workqueue.c:3084
__lru_add_drain_all+0x33a/0x6e0 mm/swap.c:849
khugepaged_do_scan mm/khugepaged.c:2222 [inline]
khugepaged+0xf0/0x3ec0 mm/khugepaged.c:2283
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task dhcpcd:16143 blocked for more than 144 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:29120 pid:16143 ppid: 3216 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26e0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:836
packet_release+0x8bf/0xb40 net/packet/af_packet.c:3135
__sock_release+0xbb/0x270 net/socket.c:649
sock_close+0xf/0x20 net/socket.c:1314
__fput+0x204/0x8d0 fs/file_table.c:280
task_work_run+0xc0/0x160 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f18dfe46fc3
RSP: 002b:00007ffe11bcc848 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000563e4ebe8b60 RCX: 00007f18dfe46fc3
RDX: 000000000000010f RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000563e4f89bb40 R09: 00007f18dff16a60
R10: 0000000001000000 R11: 0000000000000246 R12: 0000563e4f8a00c0
R13: 0000563e4f89ca28 R14: 00007ffe11bed12c R15: 00007ffe11bed154
INFO: task dhcpcd:16144 blocked for more than 145 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:29328 pid:16144 ppid: 3216 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26e0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
synchronize_rcu_expedited+0x471/0x620 kernel/rcu/tree_exp.h:852
__unregister_prot_hook+0x344/0x460 net/packet/af_packet.c:381
packet_do_bind+0x549/0xbd0 net/packet/af_packet.c:3210
__sys_bind+0x16b/0x1d0 net/socket.c:1693
__do_sys_bind net/socket.c:1704 [inline]
__se_sys_bind net/socket.c:1702 [inline]
__x64_sys_bind+0x6a/0xb0 net/socket.c:1702
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f18dfe55ce7
RSP: 002b:00007ffe11bcc848 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000563e4ebe8b60 RCX: 00007f18dfe55ce7
RDX: 0000000000000014 RSI: 00007ffe11bcc858 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000563e4f89c4a0 R09: 00007f18dff16a60
R10: 0000000001000000 R11: 0000000000000217 R12: 0000563e4f8a00c0
R13: 0000563e4f89cba8 R14: 00007ffe11bed12c R15: 00007ffe11bed154
INFO: task dhcpcd:16156 blocked for more than 146 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:29328 pid:16156 ppid: 3216 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26e0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x5a8/0x620 kernel/rcu/tree_exp.h:836
__unregister_prot_hook+0x344/0x460 net/packet/af_packet.c:381
packet_do_bind+0x549/0xbd0 net/packet/af_packet.c:3210
__sys_bind+0x16b/0x1d0 net/socket.c:1693
__do_sys_bind net/socket.c:1704 [inline]
__se_sys_bind net/socket.c:1702 [inline]
__x64_sys_bind+0x6a/0xb0 net/socket.c:1702
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f18dfe55ce7
RSP: 002b:00007ffe11bcc848 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000563e4ebe8b60 RCX: 00007f18dfe55ce7
RDX: 0000000000000014 RSI: 00007ffe11bcc858 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000563e4f89bb40 R09: 00007f18dff16a60
R10: 0000000001000000 R11: 0000000000000217 R12: 0000563e4f8a00c0
R13: 0000563e4f89ced8 R14: 00007ffe11bed12c R15: 00007ffe11bed154
Showing all locks held in the system:
2 locks held by kworker/u4:0/8:
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:478 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1316 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1614 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26e0 kernel/sched/core.c:6167
#1: ffffc90000cd7db8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1420 kernel/workqueue.c:2273
2 locks held by ksoftirqd/0/13:
1 lock held by khungtaskd/26:
#0: ffffffff8ab78b80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/32:
#0: ffffffff8ac576c8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x5a/0x6e0 mm/swap.c:798
2 locks held by kworker/u4:2/44:
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1420 kernel/workqueue.c:2269
#1: ffffc9000114fdb8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1420 kernel/workqueue.c:2273
2 locks held by kworker/u4:5/1042:
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88800fc69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1420 kernel/workqueue.c:2269
#1: ffffc900048efdb8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1420 kernel/workqueue.c:2273
2 locks held by getty/3313:
#0: ffff88814a93e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900027962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2113
3 locks held by kworker/0:7/3970:
2 locks held by kworker/u4:6/6922:
2 locks held by dhcpcd/16143:
#0: ffff88805afa9a10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff88805afa9a10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release+0x76/0x270 net/socket.c:648
#1: ffffffff8ab81ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#1: ffffffff8ab81ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:836
2 locks held by dhcpcd/16144:
#0: ffff88804c79e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff88804c79e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
#1: ffffffff8ab81ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#1: ffffffff8ab81ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:836
1 lock held by dhcpcd/16156:
#0: ffff888072f46120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888072f46120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/17741:
#0: ffff88804a222120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff88804a222120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/17786:
#0: ffff888025a34120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888025a34120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/17951:
#0: ffff888056712120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888056712120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/18068:
#0: ffff888048bda120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888048bda120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/23965:
#0: ffff888049bfc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888049bfc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/24066:
#0: ffff888063e62120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888063e62120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
1 lock held by dhcpcd/24158:
#0: ffff888026dee120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1645 [inline]
#0: ffff888026dee120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xbd0 net/packet/af_packet.c:3173
2 locks held by syz-executor.1/25701:
#0: ffff88805fc52c10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff88805fc52c10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release+0x76/0x270 net/socket.c:648
#1: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xad/0x2e0 net/ipv6/ip6mr.c:1582
2 locks held by syz-executor.3/25702:
#0: ffff88805fe9c410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff88805fe9c410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release+0x76/0x270 net/socket.c:648
#1: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xad/0x2e0 net/ipv6/ip6mr.c:1582
2 locks held by syz-executor.4/25703:
#0: ffff8880743ed610 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff8880743ed610 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release+0x76/0x270 net/socket.c:648
#1: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xad/0x2e0 net/ipv6/ip6mr.c:1582
2 locks held by syz-executor.5/25706:
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:478 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1316 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1614 [inline]
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26e0 kernel/sched/core.c:6167
#1: ffff8880b9f279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
1 lock held by syz-executor.3/25727:
1 lock held by syz-executor.0/25724:
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.2/25730:
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.1/25729:
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
1 lock held by syz-executor.5/25733:
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c2531c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5568
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x0/0x150 kernel/rcu/tree.c:1166
Code: 4c 8b 44 24 38 4c 8b 4c 24 30 4c 8b 54 24 28 48 8b 54 24 20 48 8b 44 24 18 e9 41 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 <65> 8b 15 69 4d a9 7e 81 e2 00 00 f0 00 b8 01 00 00 00 75 0a 8b 15
RSP: 0018:ffffc90000d274d8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880212c3aa0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff89216460 RDI: ffffffff8a63d8a0
RBP: ffffc90000d27558 R08: 0000000000000001 R09: ffffc90000d27738
R10: fffffbfff1dcd128 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000001 R14: ffffc90000d27748 R15: ffff88807c05a000
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f739b980718 CR3: 0000000020dfc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_held_common kernel/rcu/update.c:102 [inline]
rcu_read_lock_held+0x21/0x40 kernel/rcu/update.c:309
__in6_dev_get include/net/addrconf.h:313 [inline]
ip6_ignore_linkdown include/net/addrconf.h:404 [inline]
find_match.part.0+0x19d/0xb20 net/ipv6/route.c:738
find_match net/ipv6/route.c:825 [inline]
__find_rr_leaf+0x14f/0xa40 net/ipv6/route.c:826
find_rr_leaf net/ipv6/route.c:847 [inline]
rt6_select net/ipv6/route.c:891 [inline]
fib6_table_lookup+0x496/0x840 net/ipv6/route.c:2185
ip6_pol_route+0x17d/0xe10 net/ipv6/route.c:2221
pol_lookup_func include/net/ip6_fib.h:580 [inline]
fib6_rule_lookup+0xfb/0x630 net/ipv6/fib6_rules.c:115
ip6_route_input_lookup net/ipv6/route.c:2291 [inline]
ip6_route_input+0x56a/0xa10 net/ipv6/route.c:2587
ip6_rcv_finish net/ipv6/ip6_input.c:74 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x1c5/0x330 net/ipv6/ip6_input.c:297
__netif_receive_skb_one_core+0x104/0x180 net/core/dev.c:5465
process_backlog+0x22a/0x610 net/core/dev.c:6455
__napi_poll+0x96/0x360 net/core/dev.c:7023
napi_poll net/core/dev.c:7090 [inline]
net_rx_action+0x6fc/0xa50 net/core/dev.c:7177
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:921 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
smpboot_thread_fn+0x548/0x8c0 kernel/smpboot.c:164
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 4c 8b 44 24 38 mov 0x38(%rsp),%r8
5: 4c 8b 4c 24 30 mov 0x30(%rsp),%r9
a: 4c 8b 54 24 28 mov 0x28(%rsp),%r10
f: 48 8b 54 24 20 mov 0x20(%rsp),%rdx
14: 48 8b 44 24 18 mov 0x18(%rsp),%rax
19: e9 41 fe ff ff jmpq 0xfffffe5f
1e: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
25: 00 00 00 00
29: 90 nop
* 2a: 65 8b 15 69 4d a9 7e mov %gs:0x7ea94d69(%rip),%edx # 0x7ea94d9a <-- trapping instruction
31: 81 e2 00 00 f0 00 and $0xf00000,%edx
37: b8 01 00 00 00 mov $0x1,%eax
3c: 75 0a jne 0x48
3e: 8b .byte 0x8b
3f: 15 .byte 0x15