INFO: task syz-executor.4:11866 can't die for more than 143 seconds.
syz-executor.4  D27568 11866   7214 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1f80 kernel/sched/core.c:4155
 schedule+0xd0/0x2a0 kernel/sched/core.c:4230
 p9_client_rpc+0x3b7/0x1280 net/9p/client.c:757
 p9_client_flush+0xe9/0x1e0 net/9p/client.c:665
 p9_client_rpc+0x1117/0x1280 net/9p/client.c:782
 p9_client_version net/9p/client.c:953 [inline]
 p9_client_create+0xb8e/0x1410 net/9p/client.c:1053
 v9fs_session_init+0x1e7/0x18c0 fs/9p/v9fs.c:406
 v9fs_mount+0x79/0x970 fs/9p/vfs_super.c:124
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1558
 do_new_mount fs/namespace.c:2908 [inline]
 do_mount+0x12f9/0x1b50 fs/namespace.c:3234
 __do_sys_mount fs/namespace.c:3444 [inline]
 __se_sys_mount fs/namespace.c:3421 [inline]
 __x64_sys_mount+0x18f/0x230 fs/namespace.c:3421
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ca69
Code: Bad RIP value.
RSP: 002b:00007f83c3994c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000004f6300 RCX: 000000000045ca69
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 000000000078c040 R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000752 R14: 00000000004ca355 R15: 00007f83c39956d4

Showing all locks held in the system:
3 locks held by kworker/u4:6/404:
 #0: ffff8880ae637e18 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x9c0/0xdc0 kernel/sched/fair.c:10525
 #1: ffffffff89bbde00 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x42/0x3e0 kernel/sched/fair.c:6002
 #2: ffff888091df6900 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{3:3}, at: batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
 #2: ffff888091df6900 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{3:3}, at: batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
 #2: ffff888091df6900 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{3:3}, at: batadv_iv_send_outstanding_bat_ogm_packet+0x5c0/0x7c0 net/batman-adv/bat_iv_ogm.c:1722
1 lock held by khungtaskd/1140:
 #0: ffffffff89bbde00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779
1 lock held by in:imklog/6499:
 #0: ffff8880a891be30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826
2 locks held by agetty/6728:
 #0: ffff8880a8183098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
 #1: ffffc90000fa42e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156
2 locks held by agetty/6730:
 #0: ffff88809a164098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
 #1: ffffc90000f602e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156

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