INFO: task syz.4.255:6919 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.255 state:D stack:26048 pid:6919 tgid:6919 ppid:5837 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
request_wait_answer+0x4f8/0x900 fs/fuse/dev.c:464
__fuse_request_send fs/fuse/dev.c:478 [inline]
__fuse_simple_request+0x32d/0xcb0 fs/fuse/dev.c:572
fuse_simple_request fs/fuse/fuse_i.h:1156 [inline]
fuse_flush+0x4ea/0x6d0 fs/fuse/file.c:542
filp_flush+0xf0/0x1a0 fs/open.c:1514
filp_close+0x1c/0x30 fs/open.c:1527
__range_close fs/file.c:745 [inline]
__do_sys_close_range+0x380/0x700 fs/file.c:804
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: 0033:0x7fc68697e819
RSP: 002b:00007ffce704baa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fc686b37ba0 RCX: 00007fc68697e819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc686b37ba0 R08: 0000000000000000 R09: 00007ffce704bd9f
R10: 0000000000ddd530 R11: 0000000000000246 R12: 000000000002227e
R13: 00007fc686b36160 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
#0: ffff88801b081148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90000107d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
1 lock held by khungtaskd/30:
#0: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bba80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
5 locks held by kworker/u8:2/35:
3 locks held by kworker/u8:3/53:
5 locks held by kworker/u8:7/3434:
2 locks held by dhcpcd/5505:
#0: ffff8880373926c8 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x970 net/netlink/af_netlink.c:2395
#1: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x18f/0x1f0 net/core/rtnetlink.c:6779
2 locks held by getty/5592:
#0: ffff88803728a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fc62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:6/5927:
#0: ffff88801b078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90005067d80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2:
ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
2 locks held by syz-executor/9196:
#0: ffffffff8fec7410 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x292/0x6b0 net/core/net_namespace.c:496
#1: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x218/0x790 net/ipv4/ip_tunnel.c:1159
1 lock held by syz.3.699/9209:
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3517
1 lock held by syz.3.699/9212:
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline]
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x26e/0x1f50 net/ipv4/devinet.c:1129
1 lock held by syz.2.700/9224:
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#0: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x5d0/0x1c50 net/core/rtnetlink.c:4000
4 locks held by syz.0.702/9232:
#0: ffffffff9ab927d8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg+0x16a/0x6e0 drivers/infiniband/core/netlink.c:164
#1: ffffffff8fb298f0 (link_ops_rwsem){++++}-{4:4}, at: nldev_newlink+0x2d3/0x660 drivers/infiniband/core/nldev.c:1785
#2: ffff88807853d238 (&rxe->usdev_lock){+.+.}-{4:4}, at: rxe_query_port+0x5d/0x200 drivers/infiniband/sw/rxe/rxe_verbs.c:54
#3: ffffffff8fedd288 (rtnl_mutex){+.+.}-{4:4}, at: ib_get_eth_speed+0x118/0xb50 drivers/infiniband/core/verbs.c:1995
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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: 9241 Comm: syz.7.704 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:write_comp_data+0x42/0x90 kernel/kcov.c:246
Code: a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00 0f 00 75 60 a9 00 00 f0 00 75 59 8b 82 1c 16 00 00 85 c0 74 4f 8b 82 f8 15 00 00 <83> f8 03 75 44 48 8b 82 00 16 00 00 8b 92 fc 15 00 00 48 8b 38 48
RSP: 0018:ffffc900041777d8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff88f67da2
RDX: ffff8880482d4880 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88803719ddc0
R13: ffffc90004177da8 R14: 0000000000000000 R15: ffff88804dd2e028
FS: 00007f535f9e66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f535f9e6d58 CR3: 00000000347c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
cpu_max_bits_warn include/linux/cpumask.h:135 [inline]
cpumask_check include/linux/cpumask.h:142 [inline]
cpumask_test_cpu include/linux/cpumask.h:570 [inline]
cpu_online include/linux/cpumask.h:1117 [inline]
trace_skb_copy_datagram_iovec+0x32/0x220 include/trace/events/skb.h:76
skb_copy_datagram_iter+0x24/0x50 net/core/datagram.c:537
skb_copy_datagram_msg include/linux/skbuff.h:4115 [inline]
__unix_dgram_recvmsg+0x460/0xe50 net/unix/af_unix.c:2479
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2537
sock_recvmsg_nosec net/socket.c:1033 [inline]
____sys_recvmsg+0x5f8/0x6b0 net/socket.c:2801
___sys_recvmsg+0x115/0x1a0 net/socket.c:2845
do_recvmmsg+0x2f8/0x740 net/socket.c:2940
__sys_recvmmsg net/socket.c:3014 [inline]
__do_sys_recvmmsg net/socket.c:3037 [inline]
__se_sys_recvmmsg net/socket.c:3030 [inline]
__x64_sys_recvmmsg+0x239/0x290 net/socket.c:3030
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: 0033:0x7f535eb7e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f535f9e6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f535ed36080 RCX: 00007f535eb7e819
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000008
RBP: 00007f535ebf175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f535ed36080 R15: 00007ffd5b04b768