INFO: task syz-executor.0:24787 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.0 D28648 24787 8175 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:748 [inline] fuse_flush+0x1fd/0x5b0 fs/fuse/file.c:421 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) filp_close+0xb4/0x160 fs/open.c:1162 __close_fd+0x133/0x200 fs/file.c:636 __do_sys_close fs/open.c:1181 [inline] __se_sys_close fs/open.c:1179 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1179 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7ba5b3437b Code: Bad RIP value. RSP: 002b:00007ffdb514e1e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f7ba5b3437b RDX: 0000001b32120000 RSI: 0000001b32125ff4 RDI: 0000000000000005 RBP: 00007f7ba5ca4980 R08: 0000000000000000 R09: 000000003253460c R10: 000c178c52429a10 R11: 0000000000000293 R12: 0000000000058b8a R13: 00007ffdb514e2e0 R14: 00007f7ba5ca3050 R15: 0000000000000032 FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): Unrecognized mount option "nf{=noq" or missing value INFO: task syz-executor.0:24789 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. FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) syz-executor.0 D27656 24789 8175 0x00000004 Call Trace: FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) schedule+0x8d/0x1b0 kernel/sched/core.c:3561 FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop5): Unrecognized mount option "nfs=nostále5s" or missing value FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) fuse_wait_on_page_writeback fs/fuse/file.c:383 [inline] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 fs/fuse/file.c:379 FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) FAT-fs (loop2): error, fat_get_cluster: invalid start cluster (i_pos 0, start f8000000) netlink: 68 bytes leftover after parsing attributes in process `syz-executor.5'. kauditd_printk_skb: 37 callbacks suppressed audit: type=1800 audit(1666158399.201:1035): pid=1068 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="/" dev="loop2" ino=481 res=0 fuse_launder_page fs/fuse/file.c:2033 [inline] fuse_launder_page+0xb6/0xe0 fs/fuse/file.c:2026 do_launder_page mm/truncate.c:655 [inline] invalidate_inode_pages2_range+0x795/0x1110 mm/truncate.c:725 netlink: 68 bytes leftover after parsing attributes in process `syz-executor.5'. fuse_finish_open+0x2e2/0x590 fs/fuse/file.c:182 fuse_open_common+0x254/0x2c0 fs/fuse/file.c:222 do_dentry_open+0x4aa/0x1160 fs/open.c:796 netlink: 68 bytes leftover after parsing attributes in process `syz-executor.5'. do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 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: 0033:0x7f7ba5b825a9 Code: Bad RIP value. RSP: 002b:00007f7ba44f5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f7ba5ca2f80 RCX: 00007f7ba5b825a9 RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000020000100 RBP: 00007f7ba5bdd580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb514e17f R14: 00007f7ba44f5300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by ksoftirqd/0/9: #0: 0000000083c35bee (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 0000000083c35bee (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 00000000219dab09 (&(&pool->lock)->rlock){-.-.}, at: spin_lock include/linux/spinlock.h:329 [inline] #1: 00000000219dab09 (&(&pool->lock)->rlock){-.-.}, at: __queue_work+0x34a/0x1100 kernel/workqueue.c:1419 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) 2 locks held by kworker/u4:3/139: 1 lock held by khungtaskd/1570: #0: 00000000e42643ee (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 3 locks held by kworker/u4:6/3583: #0: 0000000051ad066d ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) #1: 000000003303167c (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000024d5fb7f (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 2 locks held by kworker/0:2/3689: #0: 00000000f07ab12b ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000089ba2c03 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 1 lock held by in:imklog/7823: #0: 000000003f63180f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.0/24787: #0: 0000000016afdacd (&sb->s_type->i_mutex_key#26){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 0000000016afdacd (&sb->s_type->i_mutex_key#26){+.+.}, at: fuse_flush+0x1fd/0x5b0 fs/fuse/file.c:421 2 locks held by syz-executor.0/24789: #0: 000000000ea89fff (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000000ea89fff (sb_writers#19){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 0000000016afdacd (&sb->s_type->i_mutex_key#26){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 0000000016afdacd (&sb->s_type->i_mutex_key#26){+.+.}, at: fuse_open_common+0x1bc/0x2c0 fs/fuse/file.c:215 2 locks held by syz-executor.4/1091: #0: 0000000085e02be4 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 0000000085e02be4 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue #1: 00000000025d686b (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #1: 00000000025d686b (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.1/1154: #0: 00000000025d686b (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: 00000000025d686b (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.0/1176: #0: 0000000002a19c37 (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xe50 drivers/block/loop.c:1080 2 locks held by systemd-udevd/1185: #0: 0000000036cf099b (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 #1: 0000000002a19c37 (loop_ctl_mutex){+.+.}, at: lo_open+0x19/0xd0 drivers/block/loop.c:1771 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 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: 1160 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:trace_hardirqs_on+0x3c/0x210 kernel/trace/trace_preemptirq.c:24 Code: 9a 7e 31 ff 89 de e8 83 dd fa ff 85 db 74 2f e8 0a dc fa ff 65 8b 1d e3 35 9a 7e 81 e3 00 00 10 00 31 ff 89 de e8 64 dd fa ff <85> db 74 27 e8 eb db fa ff 65 c7 05 a0 c2 9a 7e 00 00 00 00 e8 db RSP: 0000:ffff888049f077b0 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8167a97c RDX: 0000000000000000 RSI: ffff8880408f2380 RDI: 0000000000000005 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88813fffb6c0 R13: ffffea0000c1d008 R14: ffff88813fffb6c0 R15: dffffc0000000000 FS: 000055555564d400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe4aace4718 CR3: 000000009eea8000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rmqueue_pcplist mm/page_alloc.c:2997 [inline] rmqueue mm/page_alloc.c:3014 [inline] get_page_from_freelist+0x1d01/0x4170 mm/page_alloc.c:3373 __alloc_pages_nodemask+0x387/0x2890 mm/page_alloc.c:4399 alloc_pages_vma+0xf2/0x780 mm/mempolicy.c:2161 alloc_zeroed_user_highpage_movable include/linux/highmem.h:184 [inline] do_anonymous_page+0x7c2/0x1be0 mm/memory.c:3312 handle_pte_fault mm/memory.c:4173 [inline] __handle_mm_fault+0x227a/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x7fe4ac46accf Code: ff ff 4d 89 cd 48 85 c0 74 19 8b 95 44 ff ff ff 48 29 c6 48 01 c7 e8 f0 09 05 00 85 c0 0f 85 0b 03 00 00 48 8b 85 48 ff ff ff <41> c7 45 18 01 00 00 00 4c 89 ef 49 89 85 90 06 00 00 48 8b 85 50 RSP: 002b:00007ffd7ba50a10 EFLAGS: 00010246 RAX: 00007fe4aacc4000 RBX: 0000000000021000 RCX: 00007fe4ac4bb6b7 RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007fe4aacc5000 RBP: 00007ffd7ba50ae0 R08: 00000000ffffffff R09: 00007fe4aace4700 R10: 0000000000020022 R11: 0000000000000206 R12: 00007ffd7ba50c00 R13: 00007fe4aace4700 R14: 0000000000000000 R15: 0000000000022000