INFO: task syz-executor.3:7235 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:28552 pid: 7235 ppid: 3635 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0xab2/0x4db0 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881 io_schedule_timeout+0xfd/0x180 kernel/sched/core.c:8395 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common_io kernel/sched/completion.c:123 [inline] wait_for_completion_io_timeout+0x16f/0x280 kernel/sched/completion.c:191 submit_bio_wait+0x158/0x230 block/bio.c:1308 blkdev_issue_flush+0x95/0xd0 block/blk-flush.c:464 blkdev_fsync+0x68/0xa0 block/fops.c:471 vfs_fsync_range fs/sync.c:182 [inline] vfs_fsync fs/sync.c:196 [inline] do_fsync fs/sync.c:206 [inline] __do_sys_fdatasync fs/sync.c:219 [inline] __se_sys_fdatasync fs/sync.c:217 [inline] __x64_sys_fdatasync+0xc5/0x140 fs/sync.c:217 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: 0033:0x7f157dba6059 RSP: 002b:00007f157cafa168 EFLAGS: 00000246 ORIG_RAX: 000000000000004b RAX: ffffffffffffffda RBX: 00007f157dcb9030 RCX: 00007f157dba6059 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f157dc0008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff8375c8f R14: 00007f157cafa300 R15: 0000000000022000 INFO: task syz-executor.2:7245 can't die for more than 143 seconds. task:syz-executor.2 state:D stack:28520 pid: 7245 ppid: 6573 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0xab2/0x4db0 kernel/sched/core.c:6295 schedule+0xd2/0x260 kernel/sched/core.c:6368 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881 io_schedule_timeout+0xfd/0x180 kernel/sched/core.c:8395 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common_io kernel/sched/completion.c:123 [inline] wait_for_completion_io_timeout+0x16f/0x280 kernel/sched/completion.c:191 submit_bio_wait+0x158/0x230 block/bio.c:1308 blkdev_issue_flush+0x95/0xd0 block/blk-flush.c:464 blkdev_fsync+0x68/0xa0 block/fops.c:471 vfs_fsync_range fs/sync.c:182 [inline] vfs_fsync fs/sync.c:196 [inline] do_fsync fs/sync.c:206 [inline] __do_sys_fdatasync fs/sync.c:219 [inline] __se_sys_fdatasync fs/sync.c:217 [inline] __x64_sys_fdatasync+0xc5/0x140 fs/sync.c:217 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: 0033:0x7f4b2bb90059 RSP: 002b:00007f4b2ab05168 EFLAGS: 00000246 ORIG_RAX: 000000000000004b RAX: ffffffffffffffda RBX: 00007f4b2bca2f60 RCX: 00007f4b2bb90059 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f4b2bbea08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6868d68f R14: 00007f4b2ab05300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bd84520 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6463 2 locks held by kworker/u4:2/44: 2 locks held by getty/3284: #0: ffff88814b334098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077 =============================================