EXT4-fs (sda1): Unrecognized mount option "sĽÃ" or missing value INFO: task syz-executor0:7882 blocked for more than 120 seconds. Not tainted 4.17.0+ #101 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25192 7882 4584 0x00000004 Call Trace: context_switch kernel/sched/core.c:2858 [inline] __schedule+0x83b/0x1e70 kernel/sched/core.c:3500 schedule+0xef/0x430 kernel/sched/core.c:3544 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3602 __mutex_lock_common kernel/locking/mutex.c:834 [inline] __mutex_lock+0xe38/0x17f0 kernel/locking/mutex.c:894 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:909 __fdget_pos+0x1a9/0x1e0 fs/file.c:766 fdget_pos include/linux/file.h:67 [inline] ksys_write+0x77/0x250 fs/read_write.c:593 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: Bad RIP value. RSP: 002b:00007ff41e99bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff41e99c6d4 RCX: 0000000000455b29 RDX: 00000000000001d1 RSI: 00000000200000c0 RDI: 0000000000000013 RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c25a3 R14: 00000000004d36d8 R15: 0000000000000001 Showing all locks held in the system: 3 locks held by kworker/u4:1/23: 1 lock held by khungtaskd/898: #0: 00000000278da4c6 (rcu_read_lock){....}, at: debug_show_all_locks+0xc8/0x40c kernel/locking/lockdep.c:4461 1 lock held by rsyslogd/4450: 2 locks held by getty/4540: #0: 000000004b0824d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000fbe66d4d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4541: #0: 00000000464a180c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000d306b6e8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4542: #0: 0000000060be765c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000b4fe754f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4543: #0: 000000005c394df8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000657396ef (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4544: #0: 00000000a950e454 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000009a750638 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4545: #0: 0000000089862a02 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000d744154e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4546: #0: 00000000b6fa2175 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000de39f47f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 3 locks held by syz-executor0/7865: 1 lock held by syz-executor0/7882: #0: 000000009f7b289a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 fs/file.c:766 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 898 Comm: khungtaskd Not tainted 4.17.0+ #101 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x9bc/0xf70 kernel/hung_task.c:252 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7865 Comm: syz-executor0 Not tainted 4.17.0+ #101 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_lockdep_current_cpu_online+0xe/0x190 kernel/rcu/tree.c:1083 Code: b8 17 ff ff b8 01 00 00 00 5d c3 e8 0c dd 51 00 eb 8f e8 05 dd 51 00 eb ce 0f 1f 00 48 ba 00 00 00 00 00 fc ff df 55 48 89 e5 <41> 57 41 56 41 55 41 54 53 48 8d 9d 78 ff ff ff 48 c1 eb 03 48 8d RSP: 0018:ffff88017ce6eb30 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffff1002f9cdd59 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8801daf236b0 RBP: ffff88017ce6eb30 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000001 R13: ffffea000622a140 R14: dffffc0000000000 R15: ffff88017ce6ee10 FS: 00007ff41e9bd700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c84e3000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held+0x90/0xc0 kernel/rcu/update.c:283 radix_tree_deref_slot include/linux/radix-tree.h:241 [inline] find_get_entry+0x835/0xb90 mm/filemap.c:1433 pagecache_get_page+0x116/0xe20 mm/filemap.c:1541 find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:940 [inline] grow_buffers fs/buffer.c:1009 [inline] __getblk_slow fs/buffer.c:1036 [inline] __getblk_gfp+0x39e/0xaf0 fs/buffer.c:1313 __bread_gfp+0x2d/0x310 fs/buffer.c:1347 sb_bread include/linux/buffer_head.h:307 [inline] fat12_ent_bread+0x14e/0x3d0 fs/fat/fatent.c:75 fat_ent_read+0x544/0xbf0 fs/fat/fatent.c:367 fat_get_cluster+0xb52/0x15e0 fs/fat/cache.c:260 fat_free fs/fat/file.c:316 [inline] fat_truncate_blocks+0x511/0x1150 fs/fat/file.c:364 fat_write_failed.isra.14+0x86/0xb0 fs/fat/inode.c:212 fat_write_begin+0xe3/0x120 fs/fat/inode.c:227 generic_perform_write+0x39a/0x6a0 mm/filemap.c:3139 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3264 generic_file_write_iter+0x430/0x850 mm/filemap.c:3292 call_write_iter include/linux/fs.h:1793 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6ae/0x9d0 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff41e9bcc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff41e9bd6d4 RCX: 0000000000455b29 RDX: 000000000000e9c9 RSI: 00000000200001c0 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c25a3 R14: 00000000004d36d8 R15: 0000000000000000 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.258 msecs