Bluetooth: hci4 command 0x0406 tx timeout
BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 276s!
INFO: task kworker/u4:0:5 blocked for more than 140 seconds.
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
Not tainted 4.14.282-syzkaller #0
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=21/256 refcnt=22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:0 D28600 5 2 0x80000000
in-flight:
Workqueue: events_unbound fsnotify_connector_destroy_workfn
8939:rtc_timer_do_work
pending: macvlan_process_broadcast, defense_work_handler, kernfs_notify_workfn, wait_rcu_exp_gp, defense_work_handler, defense_work_handler, vmstat_shepherd
, defense_work_handler, macvlan_process_broadcast, defense_work_handler, macvlan_process_broadcast, defense_work_handler, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout, hci_cmd_timeout, cache_reap
Call Trace:
, free_obj_work, switchdev_deferred_process_work
workqueue events_unbound: flags=0x2
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
pwq 4:
cpus=0-1
flags=0x4 nice=0 active=4/512 refcnt=7
in-flight: 2885:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 5:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn
workqueue events_power_efficient: flags=0x80
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
pending: process_srcu, do_cache_clean, neigh_periodic_work
workqueue mm_percpu_wq: flags=0x8
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
pending: vmstat_update
workqueue ipv6_addrconf: flags=0x40008
schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724
pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=122
pending: addrconf_dad_work
delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common+0x272/0x430 kernel/sched/completion.c:123
, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
__synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898
, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work
, addrconf_dad_work
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
kthread+0x30d/0x420 kernel/kthread.c:232
, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
pool 0:
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
cpus=0
INFO: task kworker/u4:4:2885 blocked for more than 140 seconds.
node=0 flags=0x0 nice=0 hung=276s workers=5 idle: 3626 9221 3 24
pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=6 idle: 22 2847 2901
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4 D28896 2885 2 0x80000000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common+0x272/0x430 kernel/sched/completion.c:123
__synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898
fsnotify_mark_destroy_workfn+0xed/0x2e0 fs/notify/mark.c:757
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: task syz-executor.3:7982 blocked for more than 140 seconds.
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D25840 7982 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline]
_synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596
synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762
synchronize_net+0x3a/0x40 net/core/dev.c:8250
nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295
nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383
arpt_register_table+0x1d3/0x280 net/ipv4/netfilter/arp_tables.c:1570
arptable_filter_table_init net/ipv4/netfilter/arptable_filter.c:52 [inline]
arptable_filter_table_init+0x82/0xc0 net/ipv4/netfilter/arptable_filter.c:41
xt_find_table_lock+0x247/0x3d0 net/netfilter/x_tables.c:1106
get_info+0x10a/0x540 net/ipv4/netfilter/arp_tables.c:806
do_arpt_get_ctl+0x309/0x6d0 net/ipv4/netfilter/arp_tables.c:1487
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x62/0xc0 net/netfilter/nf_sockopt.c:122
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x105/0x150 net/ipv4/ip_sockglue.c:1551
tcp_getsockopt+0x7b/0xc0 net/ipv4/tcp.c:3259
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x102/0x1c0 net/socket.c:1878
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f5d1c87c72a
RSP: 002b:00007ffde7466c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f5d1c95c4c0 RCX: 00007f5d1c87c72a
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffde7466c6c R08: 00007ffde7466c6c R09: ff00000000000000
R10: 00007f5d1c95c4c8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f5d1c95be48 R15: 00007ffde7467380
INFO: task syz-executor.5:7983 blocked for more than 140 seconds.
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D25800 7983 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline]
_synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596
synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762
synchronize_net+0x3a/0x40 net/core/dev.c:8250
nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295
nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383
arpt_register_table+0x1d3/0x280 net/ipv4/netfilter/arp_tables.c:1570
arptable_filter_table_init net/ipv4/netfilter/arptable_filter.c:52 [inline]
arptable_filter_table_init+0x82/0xc0 net/ipv4/netfilter/arptable_filter.c:41
xt_find_table_lock+0x247/0x3d0 net/netfilter/x_tables.c:1106
get_info+0x10a/0x540 net/ipv4/netfilter/arp_tables.c:806
do_arpt_get_ctl+0x309/0x6d0 net/ipv4/netfilter/arp_tables.c:1487
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x62/0xc0 net/netfilter/nf_sockopt.c:122
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x105/0x150 net/ipv4/ip_sockglue.c:1551
tcp_getsockopt+0x7b/0xc0 net/ipv4/tcp.c:3259
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x102/0x1c0 net/socket.c:1878
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f2a888ff72a
RSP: 002b:00007ffc0fb02b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f2a889df4c0 RCX: 00007f2a888ff72a
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffc0fb02b7c R08: 00007ffc0fb02b7c R09: ff00000000000000
R10: 00007f2a889df4c8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f2a889dee48 R15: 00007ffc0fb03290
INFO: task syz-executor.0:7985 blocked for more than 140 seconds.
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D25824 7985 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
_synchronize_rcu_expedited+0x522/0x770 kernel/rcu/tree_exp.h:615
synchronize_net+0x2b/0x40 net/core/dev.c:8248
nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295
nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383
arpt_register_table+0x1d3/0x280 net/ipv4/netfilter/arp_tables.c:1570
arptable_filter_table_init net/ipv4/netfilter/arptable_filter.c:52 [inline]
arptable_filter_table_init+0x82/0xc0 net/ipv4/netfilter/arptable_filter.c:41
xt_find_table_lock+0x247/0x3d0 net/netfilter/x_tables.c:1106
get_info+0x10a/0x540 net/ipv4/netfilter/arp_tables.c:806
do_arpt_get_ctl+0x309/0x6d0 net/ipv4/netfilter/arp_tables.c:1487
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x62/0xc0 net/netfilter/nf_sockopt.c:122
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x105/0x150 net/ipv4/ip_sockglue.c:1551
tcp_getsockopt+0x7b/0xc0 net/ipv4/tcp.c:3259
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x102/0x1c0 net/socket.c:1878
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f7bfaf8d72a
RSP: 002b:00007fff12b5bd88 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f7bfb06d4c0 RCX: 00007f7bfaf8d72a
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fff12b5bd9c R08: 00007fff12b5bd9c R09: ff00000000000000
R10: 00007f7bfb06d4c8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f7bfb06ce48 R15: 00007fff12b5c4b0
INFO: task syz-executor.1:7986 blocked for more than 140 seconds.
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D25840 7986 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline]
_synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596
synchronize_net+0x2b/0x40 net/core/dev.c:8248
nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295
nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383
arpt_register_table+0x1d3/0x280 net/ipv4/netfilter/arp_tables.c:1570
arptable_filter_table_init net/ipv4/netfilter/arptable_filter.c:52 [inline]
arptable_filter_table_init+0x82/0xc0 net/ipv4/netfilter/arptable_filter.c:41
xt_find_table_lock+0x247/0x3d0 net/netfilter/x_tables.c:1106
get_info+0x10a/0x540 net/ipv4/netfilter/arp_tables.c:806
do_arpt_get_ctl+0x309/0x6d0 net/ipv4/netfilter/arp_tables.c:1487
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x62/0xc0 net/netfilter/nf_sockopt.c:122
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x105/0x150 net/ipv4/ip_sockglue.c:1551
tcp_getsockopt+0x7b/0xc0 net/ipv4/tcp.c:3259
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x102/0x1c0 net/socket.c:1878
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fad47f9272a
RSP: 002b:00007fff0f94ea88 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007fad480724c0 RCX: 00007fad47f9272a
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fff0f94ea9c R08: 00007fff0f94ea9c R09: ff00000000000000
R10: 00007fad480724c8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00007fad48071e48 R15: 00007fff0f94f1b0
INFO: task syz-executor.4:7987 blocked for more than 140 seconds.
Not tainted 4.14.282-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D25800 7987 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline]
_synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596
synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762
synchronize_net+0x3a/0x40 net/core/dev.c:8250
nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295
nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383
arpt_register_table+0x1d3/0x280 net/ipv4/netfilter/arp_tables.c:1570
arptable_filter_table_init net/ipv4/netfilter/arptable_filter.c:52 [inline]
arptable_filter_table_init+0x82/0xc0 net/ipv4/netfilter/arptable_filter.c:41
xt_find_table_lock+0x247/0x3d0 net/netfilter/x_tables.c:1106
get_info+0x10a/0x540 net/ipv4/netfilter/arp_tables.c:806
do_arpt_get_ctl+0x309/0x6d0 net/ipv4/netfilter/arp_tables.c:1487
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x62/0xc0 net/netfilter/nf_sockopt.c:122
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x105/0x150 net/ipv4/ip_sockglue.c:1551
tcp_getsockopt+0x7b/0xc0 net/ipv4/tcp.c:3259
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x102/0x1c0 net/socket.c:1878
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f1b7749a72a
RSP: 002b:00007ffff423c0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f1b7757a4c0 RCX: 00007f1b7749a72a
RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffff423c0ec R08: 00007ffff423c0ec R09: ff00000000000000
R10: 00007f1b7757a4c8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f1b77579e48 R15: 00007ffff423c800
Showing all locks held in the system:
2 locks held by kworker/u4:0/5:
#0: ("events_unbound"){+.+.}, at: [<ffffffff81364f80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: (connector_reaper_work){+.+.}, at: [<ffffffff81364fb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
1 lock held by khungtaskd/1527:
#0: (tasklist_lock){.+.+}, at: [<ffffffff87026d5c>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
2 locks held by kworker/u4:4/2885:
#0: ("events_unbound"){+.+.}, at: [<ffffffff81364f80>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: ((reaper_work).work){+.+.}, at: [<ffffffff81364fb6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
1 lock held by syz-executor.0/7985:
#0: (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffff814701e2>] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline]
#0: (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffff814701e2>] _synchronize_rcu_expedited+0x2c2/0x770 kernel/rcu/tree_exp.h:596
1 lock held by syz-executor.1/7986:
#0: (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffff8147024d>] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline]
#0: (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffff8147024d>] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1527 Comm: khungtaskd Not tainted 4.14.282-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4622 Comm: systemd-journal Not tainted 4.14.282-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a16540c0 task.stack: ffff8880a1658000
RIP: 0010:deref_stack_reg+0x36/0x1a0 arch/x86/kernel/unwind_orc.c:285
RSP: 0018:ffff8880a165f9e8 EFLAGS: 00000296
RAX: dffffc0000000000 RBX: ffff8880a165f9f0 RCX: ffffffff8a73a40a
RDX: ffff8880a165fb68 RSI: ffff8880a165fe70 RDI: ffff8880a165fb20
RBP: ffff8880a165fe70 R08: ffffffff8a73a40e R09: ffffffff8a73a40f
R10: 0000000000021338 R11: 0000000000000001 R12: ffff8880a165fb20
R13: ffff8880a165fb68 R14: ffff8880a165fb70 R15: ffff8880a165fb20
FS: 00007f33166808c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3313ab3000 CR3: 00000000a1ae7000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xc98/0x17d0 arch/x86/kernel/unwind_orc.c:425
__save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
slab_post_alloc_hook mm/slab.h:442 [inline]
slab_alloc mm/slab.c:3390 [inline]
kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550
getname_flags+0xc8/0x550 fs/namei.c:138
getname fs/namei.c:209 [inline]
user_path_create fs/namei.c:3732 [inline]
SYSC_mkdirat fs/namei.c:3864 [inline]
SyS_mkdirat+0x83/0x270 fs/namei.c:3856
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f331593b687
RSP: 002b:00007fff7bdd24d8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fff7bdd5540 RCX: 00007f331593b687
RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055756ba218a0
RBP: 00007fff7bdd2510 R08: 000055756a5763e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000055756ba218a0 R15: 00007fff7bdd2b50
Code: 56 41 55 49 89 d5 41 54 49 89 fc 55 48 89 f5 53 48 83 ec 48 48 c7 44 24 08 b3 8a b5 41 48 8d 5c 24 08 48 c7 44 24 10 78 75 b5 88 <48> c1 eb 03 48 c7 44 24 18 e0 6d 23 81 48 8d 14 03 c7 02 f1 f1
----------------
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 49 89 d5 mov %rdx,%r13
6: 41 54 push %r12
8: 49 89 fc mov %rdi,%r12
b: 55 push %rbp
c: 48 89 f5 mov %rsi,%rbp
f: 53 push %rbx
10: 48 83 ec 48 sub $0x48,%rsp
14: 48 c7 44 24 08 b3 8a movq $0x41b58ab3,0x8(%rsp)
1b: b5 41
1d: 48 8d 5c 24 08 lea 0x8(%rsp),%rbx
22: 48 c7 44 24 10 78 75 movq $0xffffffff88b57578,0x10(%rsp)
29: b5 88
* 2b: 48 c1 eb 03 shr $0x3,%rbx <-- trapping instruction
2f: 48 c7 44 24 18 e0 6d movq $0xffffffff81236de0,0x18(%rsp)
36: 23 81
38: 48 8d 14 03 lea (%rbx,%rax,1),%rdx
3c: c7 .byte 0xc7
3d: 02 f1 add %cl,%dh
3f: f1 icebp