[syzbot] INFO: task hung in ovs_dp_masks_rebalance (2)

From: syzbot
Date: Fri Sep 03 2021 - 17:40:26 EST

Next message: Joerg Roedel: "Re: [git pull] IOMMU Updates for Linux v5.15"
Previous message: Pali Rohár: "Re: [RFC PATCH 00/20] fs: Remove usage of broken nls_utf8 and drop it"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hello,

syzbot found the following issue on:

HEAD commit: 7d2a07b76933 Linux 5.14
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=164cc59d300000
kernel config: https://syzkaller.appspot.com/x/.config?x=3931e3b26cba5acf
dashboard link: https://syzkaller.appspot.com/bug?extid=45a5ef16ab5bc505d42a
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+45a5ef16ab5bc505d42a@xxxxxxxxxxxxxxxxxxxxxxxxx

INFO: task kworker/0:2:8001 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:25088 pid: 8001 ppid: 2 flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:0:13766 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:22448 pid:13766 ppid: 2 flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:1:9214 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1 state:D stack:26048 pid: 9214 ppid: 2 flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:7:27170 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7 state:D stack:25128 pid:27170 ppid: 2 flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/0:10:27216 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:10 state:D stack:27856 pid:27216 ppid: 2 flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.0:28248 blocked for more than 144 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27160 pid:28248 ppid: 27309 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
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: 0033:0x4665f9
RSP: 002b:00007f5d23461188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 000000000002b2a6 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd85f5e94f R14: 00007f5d23461300 R15: 0000000000022000
INFO: task syz-executor.2:28283 blocked for more than 144 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27160 pid:28283 ppid: 27349 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
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: 0033:0x4665f9
RSP: 002b:00007f242eb75188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffce17ce3ef R14: 00007f242eb75300 R15: 0000000000022000
INFO: task syz-executor.2:28287 blocked for more than 144 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27272 pid:28287 ppid: 27349 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
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: 0033:0x4665f9
RSP: 002b:00007f242eb54188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffce17ce3ef R14: 00007f242eb54300 R15: 0000000000022000
INFO: task syz-executor.3:28285 blocked for more than 145 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27160 pid:28285 ppid: 27323 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
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: 0033:0x4665f9
RSP: 002b:00007f4edb7df188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fffbecac43f R14: 00007f4edb7df300 R15: 0000000000022000
INFO: task syz-executor.3:28288 blocked for more than 145 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27352 pid:28288 ppid: 27323 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4695 [inline]
__schedule+0x93a/0x26f0 kernel/sched/core.c:6026
schedule+0xd3/0x270 kernel/sched/core.c:6105
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6164
__mutex_lock_common kernel/locking/mutex.c:1036 [inline]
__mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104
ovs_lock net/openvswitch/datapath.c:106 [inline]
ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
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: 0033:0x4665f9
RSP: 002b:00007f4edb7be188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fffbecac43f R14: 00007f4edb7be300 R15: 0000000000022000

Showing all locks held in the system:
3 locks held by kworker/0:1/7:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90000edfdb0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
2 locks held by kworker/u4:4/273:
1 lock held by khungtaskd/1643:
#0: ffffffff8b979840 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
2 locks held by in:imklog/8141:
2 locks held by agetty/8376:
#0: ffff8880191be098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900011f02e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
3 locks held by kworker/1:4/20830:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90001ef7db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/0:2/8001:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc900096f7db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/1:0/13766:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90018e9fdb0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
5 locks held by kworker/u4:1/2483:
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888015bee138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc9000321fdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d0b8390 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557
#3: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#3: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_exit_net+0x192/0xbc0 net/openvswitch/datapath.c:2534
#4: ffffffff8b982bb0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x440 kernel/rcu/tree.c:4029
3 locks held by kworker/1:1/9214:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90006777db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/0:0/11087:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc9000a597db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/0:4/26828:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90001a67db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/1:7/27170:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90002897db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/0:6/27171:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc900028a7db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
3 locks held by kworker/0:10/27216:
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888010867d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1630 kernel/workqueue.c:2247
#1: ffffc90001907db0 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#2: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x20/0xf0 net/openvswitch/datapath.c:2386
2 locks held by syz-executor.0/28248:
#0: ffffffff8d15ddd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
2 locks held by syz-executor.2/28283:
#0: ffffffff8d15ddd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
2 locks held by syz-executor.2/28287:
#0: ffffffff8d15ddd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
2 locks held by syz-executor.3/28285:
#0: ffffffff8d15ddd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711
2 locks held by syz-executor.3/28288:
#0: ffffffff8d15ddd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:106 [inline]
#1: ffffffff8d521268 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_cmd_new+0x4b3/0xec0 net/openvswitch/datapath.c:1711

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1643 Comm: khungtaskd Not tainted 5.14.0-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+0xcd/0x134 lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd0a/0xfc0 kernel/hung_task.c:295
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10393 Comm: kworker/u4:7 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__kasan_check_read+0x4/0x10 mm/kasan/shadow.c:31
Code: 2e 07 48 85 db 0f 85 e5 a4 2f 07 48 83 c4 60 5b 5d 41 5c 41 5d c3 c3 e9 e5 a5 2f 07 cc cc cc cc cc cc cc cc cc cc 48 8b 0c 24 <89> f6 31 d2 e9 43 f9 ff ff 0f 1f 00 48 8b 0c 24 89 f6 ba 01 00 00
RSP: 0018:ffffc90005e9fbc8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815a5631
RDX: ffff8880854c0300 RSI: 0000000000000008 RDI: ffffffff8d6c5150
RBP: 1ffff92000bd3f7c R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88c8c707 R11: 0000000000000000 R12: ffffffff8b979840
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000000012e
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f534402da20 CR3: 0000000018c8b000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0xa1/0x720 kernel/locking/lockdep.c:5636
rcu_lock_release include/linux/rcupdate.h:272 [inline]
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x771/0xe50 net/batman-adv/network-coding.c:715
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 2e 07 cs (bad)
2: 48 85 db test %rbx,%rbx
5: 0f 85 e5 a4 2f 07 jne 0x72fa4f0
b: 48 83 c4 60 add $0x60,%rsp
f: 5b pop %rbx
10: 5d pop %rbp
11: 41 5c pop %r12
13: 41 5d pop %r13
15: c3 retq
16: c3 retq
17: e9 e5 a5 2f 07 jmpq 0x72fa601
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: 48 8b 0c 24 mov (%rsp),%rcx
* 2a: 89 f6 mov %esi,%esi <-- trapping instruction
2c: 31 d2 xor %edx,%edx
2e: e9 43 f9 ff ff jmpq 0xfffff976
33: 0f 1f 00 nopl (%rax)
36: 48 8b 0c 24 mov (%rsp),%rcx
3a: 89 f6 mov %esi,%esi
3c: ba .byte 0xba
3d: 01 00 add %eax,(%rax)

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

Next message: Joerg Roedel: "Re: [git pull] IOMMU Updates for Linux v5.15"
Previous message: Pali Rohár: "Re: [RFC PATCH 00/20] fs: Remove usage of broken nls_utf8 and drop it"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]