INFO: task syz-executor.3:6143 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:28184 pid: 6143 ppid: 5800 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4965 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6246 schedule+0xd2/0x260 kernel/sched/core.c:6319 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 __down_common+0x2e0/0x420 kernel/locking/semaphore.c:224 down+0x70/0x90 kernel/locking/semaphore.c:62 console_lock+0x28/0x80 kernel/printk/printk.c:2527 con_flush_chars drivers/tty/vt/vt.c:3365 [inline] con_flush_chars+0x35/0x90 drivers/tty/vt/vt.c:3357 con_write+0x2c/0x40 drivers/tty/vt/vt.c:3296 process_output_block drivers/tty/n_tty.c:592 [inline] n_tty_write+0x410/0xfd0 drivers/tty/n_tty.c:2288 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write.constprop.0+0x526/0x910 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:2159 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:729 do_iter_write+0x188/0x710 fs/read_write.c:855 vfs_writev+0x1aa/0x630 fs/read_write.c:928 do_writev+0x139/0x300 fs/read_write.c:971 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: 0033:0x7f94b17c5a39 RSP: 002b:00007f94aed3b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f94b18c8f60 RCX: 00007f94b17c5a39 RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00007f94b181fc5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0a8c2edf R14: 00007f94aed3b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bb82ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by in:imklog/6234: #0: ffff888079577770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 2 locks held by agetty/6457: #0: ffff8880184af098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900029662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 2 locks held by agetty/6462: #0: ffff8880220e9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900028f82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 5 locks held by syz-executor.1/4636: 2 locks held by syz-executor.1/4684: #0: ffff8880220e9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:964 [inline] #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x2dd/0x910 drivers/tty/tty_io.c:1110 2 locks held by syz-executor.1/4699: #0: ffff8880220e9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:964 [inline] #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff8880220e9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x2dd/0x910 drivers/tty/tty_io.c:1110 4 locks held by syz-executor.3/6143: #0: ffff8880184af098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffff8880184af130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline] #1: ffff8880184af130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff8880184af130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x29f/0x910 drivers/tty/tty_io.c:1110 #2: ffff8880184af2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1bf/0xfd0 drivers/tty/n_tty.c:2271 #3: ffffc90002966378 (&ldata->output_lock){+.+.}-{3:3}, at: process_output_block drivers/tty/n_tty.c:547 [inline] #3: ffffc90002966378 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x53c/0xfd0 drivers/tty/n_tty.c:2288 3 locks held by kworker/0:0/6158: =============================================