block nbd5: Receive control failed (result -32) block nbd5: shutting down sockets block nbd1: Receive control failed (result -32) block nbd1: shutting down sockets block nbd4: shutting down sockets INFO: task syz-executor.4:7114 blocked for more than 140 seconds. Not tainted 4.19.150-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28608 7114 6516 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x8e5/0x22e0 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x6a9/0x13f0 kernel/locking/mutex.c:1072 blkdev_put+0x30/0x550 fs/block_dev.c:1839 blkdev_close+0x86/0xb0 fs/block_dev.c:1888 __fput+0x2ce/0x8a0 fs/file_table.c:278 task_work_run+0x141/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x269/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x57c/0x670 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4177b1 Code: Bad RIP value. RSP: 002b:00007ffeadb440d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004177b1 RDX: 0000001b32f20000 RSI: 0000000000001231 RDI: 0000000000000003 RBP: 0000000000000001 R08: 000000006d227231 R09: 000000006d227235 R10: 00007ffeadb441b0 R11: 0000000000000293 R12: 000000000118c9a0 R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118bfd4 INFO: task systemd-udevd:7122 blocked for more than 140 seconds. Not tainted 4.19.150-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D26584 7122 3723 0x00000100 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x8e5/0x22e0 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 io_schedule+0xb5/0x120 kernel/sched/core.c:5185 wait_on_page_bit_common mm/filemap.c:1123 [inline] wait_on_page_bit+0x312/0x4c0 mm/filemap.c:1156 wait_on_page_locked include/linux/pagemap.h:530 [inline] wait_on_page_read mm/filemap.c:2795 [inline] do_read_cache_page+0x905/0x11d0 mm/filemap.c:2834 read_mapping_page include/linux/pagemap.h:402 [inline] read_dev_sector+0xbf/0x520 block/partition-generic.c:671 read_part_sector block/partitions/check.h:38 [inline] adfspart_check_ICS+0x114/0xea0 block/partitions/acorn.c:366 check_partition+0x40f/0x86d block/partitions/check.c:167 rescan_partitions+0x14d/0x910 block/partition-generic.c:535 bdev_disk_changed+0x179/0x1b0 fs/block_dev.c:1435 __blkdev_get+0x128e/0x1490 fs/block_dev.c:1561 blkdev_get+0xb0/0x9b0 fs/block_dev.c:1627 blkdev_open+0x202/0x290 fs/block_dev.c:1788 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x7d5/0x2e90 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+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f54c4074840 Code: Bad RIP value. RSP: 002b:00007ffed71e8ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000564154d5a9c0 RCX: 00007f54c4074840 RDX: 0000564153b5efe3 RSI: 00000000000a0800 RDI: 0000564154d5d650 RBP: 00007ffed71e8c40 R08: 0000564153b5e670 R09: 0000000000000010 R10: 0000564153b5ed0c R11: 0000000000000246 R12: 00007ffed71e8b90 R13: 0000564154d67a90 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by khungtaskd/1091: #0: 0000000015ac3856 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x291 kernel/locking/lockdep.c:4440 1 lock held by syz-executor.4/7114: #0: 00000000372293b2 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x30/0x550 fs/block_dev.c:1839 1 lock held by systemd-udevd/7122: #0: 00000000372293b2 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1490 fs/block_dev.c:1478 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1091 Comm: khungtaskd Not tainted 4.19.150-syzkaller #0 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+0x22c/0x33e lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x18/0x3d lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb 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+0xa62/0x1020 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3718 Comm: systemd-journal Not tainted 4.19.150-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:152 [inline] RIP: 0010:unwind_next_frame+0x2de/0x2430 arch/x86/kernel/unwind_orc.c:429 Code: 44 89 5c 24 20 48 89 4c 24 18 e8 fd eb 77 00 48 8b 74 24 30 48 8b 44 24 28 44 8b 5c 24 20 48 8b 4c 24 18 8b 14 b5 84 7f 1e 8c <44> 89 df 48 8d 34 7f 48 8d b4 36 bc 91 9b 8b 83 c2 01 48 81 fe 84 RSP: 0018:ffff888093c3f9b0 EFLAGS: 00000246 RAX: 000000000002554e RBX: 1ffff11012787f3e RCX: ffffffff83554ed3 RDX: 00000000000748c3 RSI: 000000000002554f RDI: ffffffff8c27d4c0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: ffff888093c3fae7 R11: 00000000000748b3 R12: ffff888093c3fad0 R13: ffff888093c3fabd R14: ffff888093c3fad8 R15: ffff888093c3fa88 FS: 00007f71cdd098c0(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f71ca4fa000 CR3: 0000000093c93000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x83/0x100 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3727 [inline] __kmalloc_track_caller+0x155/0x4e0 mm/slab.c:3742 kmemdup+0x23/0x50 mm/util.c:118 kmemdup include/linux/string.h:446 [inline] selinux_cred_prepare+0x44/0xa0 security/selinux/hooks.c:3994 security_prepare_creds+0x50/0xb0 security/security.c:1014 prepare_creds+0x32d/0x510 kernel/cred.c:282 do_faccessat+0x94/0x7f0 fs/open.c:359 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f71ccfc59c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe7c5a8d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffe7c5abd60 RCX: 00007f71ccfc59c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005597fc7809a3 RBP: 00007ffe7c5a8e80 R08: 00005597fc7763e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00005597fde358c0 R15: 00007ffe7c5a9370