INFO: task syz-executor.5:25271 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28296 25271 1681 0x00000004 Call Trace: new mount options do not match the existing superblock, will be ignored context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 overlayfs: unrecognized mount option "fsname=$-}')×!?$*%" or missing value new mount options do not match the existing superblock, will be ignored schedule+0x8d/0x1b0 kernel/sched/core.c:3561 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 new mount options do not match the existing superblock, will be ignored __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_lookup_name+0x24c/0x5c0 fs/fuse/dir.c:330 fuse_lookup+0xdf/0x410 fs/fuse/dir.c:368 fuse_atomic_open+0x20a/0x330 fs/fuse/dir.c:508 atomic_open fs/namei.c:3073 [inline] lookup_open+0x1023/0x1a20 fs/namei.c:3205 do_last fs/namei.c:3327 [inline] path_openat+0x1804/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f20f6b575a9 Code: Bad RIP value. RSP: 002b:00007f20f50a9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f20f6c78050 RCX: 00007f20f6b575a9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f20f6bb27b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb895a2bf R14: 00007f20f50a9300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1568: #0: 000000004d80da2a (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7818: #0: 00000000b81b660e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by agetty/8030: #0: 000000000a7e969d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000b427ba1e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.0/8125: #0: 00000000bb5ac8af (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x777/0xe50 drivers/block/loop.c:1164 2 locks held by syz-executor.5/25271: #0: 000000008c210f8d (&type->i_mutex_dir_key#17){.+.+}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000008c210f8d (&type->i_mutex_dir_key#17){.+.+}, at: do_last fs/namei.c:3326 [inline] #0: 000000008c210f8d (&type->i_mutex_dir_key#17){.+.+}, at: path_openat+0x17ec/0x2df0 fs/namei.c:3537 #1: 00000000e83f0f57 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 6 locks held by systemd-udevd/6569: #0: 000000004e92ff57 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000004e92ff57 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000004d80da2a (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000004d80da2a (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 000000004e92ff57 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #2: 000000004e92ff57 (&rq->lock){-.-.}, at: ttwu_queue kernel/sched/core.c:1841 [inline] #2: 000000004e92ff57 (&rq->lock){-.-.}, at: try_to_wake_up+0x6d0/0x1050 kernel/sched/core.c:2052 #3: 00000000f51dea43 (&ep->wq){-.-.}, at: ep_poll_callback+0xbf/0xc80 fs/eventpoll.c:1127 #4: 000000004d80da2a (rcu_read_lock){....}, at: __write_once_size include/linux/compiler.h:290 [inline] #4: 000000004d80da2a (rcu_read_lock){....}, at: __list_add include/linux/list.h:66 [inline] #4: 000000004d80da2a (rcu_read_lock){....}, at: list_add_tail include/linux/list.h:93 [inline] #4: 000000004d80da2a (rcu_read_lock){....}, at: ep_poll_callback+0x898/0xc80 fs/eventpoll.c:1173 #5: 0000000080622898 (&cfs_rq->removed.lock){-.-.}, at: update_cfs_rq_load_avg kernel/sched/fair.c:3490 [inline] #5: 0000000080622898 (&cfs_rq->removed.lock){-.-.}, at: update_load_avg kernel/sched/fair.c:3612 [inline] #5: 0000000080622898 (&cfs_rq->removed.lock){-.-.}, at: enqueue_entity+0x8c1/0x3850 kernel/sched/fair.c:3974 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1568 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6623 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:lookup_bh_lru fs/buffer.c:1276 [inline] RIP: 0010:__find_get_block+0x23c/0xde0 fs/buffer.c:1291 Code: c7 c0 1d 75 88 e8 e4 a9 c6 01 65 4c 89 3d 2c 11 52 7e e8 b7 0e b2 ff 49 8d 7f 60 be 04 00 00 00 e8 29 d8 e7 ff f0 41 ff 47 60 03 45 31 e4 e8 9a 0e b2 ff e8 65 32 b7 ff 48 c7 c2 98 82 f1 89 RSP: 0018:ffff88804a177ac0 EFLAGS: 00000002 RAX: ffffed1008e1448b RBX: 0000000000000000 RCX: ffffffff81b076c7 RDX: ffffed1008e1448b RSI: 0000000000000004 RDI: ffff8880470a2450 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1008e1448a R10: ffff8880470a2453 R11: 0000000000000000 R12: ffff8880470a23f0 R13: 00000000000003b0 R14: 0000000000001000 R15: ffff8880470a23f0 FS: 0000555555fe4400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff3b083f98 CR3: 00000000a55a9000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sb_find_get_block include/linux/buffer_head.h:346 [inline] recently_deleted fs/ext4/ialloc.c:684 [inline] find_inode_bit+0x213/0x520 fs/ext4/ialloc.c:724 __ext4_new_inode+0x160c/0x5a20 fs/ext4/ialloc.c:916 ext4_symlink+0x3f5/0xc00 fs/ext4/namei.c:3176 vfs_symlink+0x453/0x6c0 fs/namei.c:4129 do_symlinkat+0x258/0x2c0 fs/namei.c:4156 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb3a665eeb7 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd6822f3b8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb3a665eeb7 RDX: 00007fb3a66ba851 RSI: 00000000ffffff9c RDI: 00007fb3a66b940b RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd6822ee30 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd6822f480 new mount options do not match the existing superblock, will be ignored