INFO: task syz-executor.2:14167 can't die for more than 143 seconds. task:syz-executor.2 state:D stack:28136 pid:14167 ppid: 6927 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4522 schedule+0xcf/0x270 kernel/sched/core.c:4600 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4659 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1802 blkdev_close+0x8c/0xb0 fs/block_dev.c:1851 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:165 [inline] exit_to_user_mode_prepare+0x1e2/0x1f0 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417781 Code: Unable to access opcode bytes at RIP 0x417757. RSP: 002b:00007ffc3c0e9dd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000417781 RDX: 0000001b2ca20000 RSI: 0000000000000729 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000c2940729 R09: 00000000c294072d R10: 00007ffc3c0e9eb0 R11: 0000000000000293 R12: 000000000118c9a0 R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118bfd4 INFO: task syz-executor.2:14167 blocked for more than 143 seconds. Not tainted 5.9.0-rc8-next-20201008-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28136 pid:14167 ppid: 6927 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4522 schedule+0xcf/0x270 kernel/sched/core.c:4600 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4659 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1802 blkdev_close+0x8c/0xb0 fs/block_dev.c:1851 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:165 [inline] exit_to_user_mode_prepare+0x1e2/0x1f0 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417781 Code: Unable to access opcode bytes at RIP 0x417757. RSP: 002b:00007ffc3c0e9dd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000417781 RDX: 0000001b2ca20000 RSI: 0000000000000729 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000c2940729 R09: 00000000c294072d R10: 00007ffc3c0e9eb0 R11: 0000000000000293 R12: 000000000118c9a0 R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118bfd4 INFO: task syz-executor.2:14182 can't die for more than 143 seconds. task:syz-executor.2 state:D stack:26504 pid:14182 ppid: 6927 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4522 schedule+0xcf/0x270 kernel/sched/core.c:4600 io_schedule+0xb5/0x120 kernel/sched/core.c:6294 wait_on_page_bit_common+0x32a/0xe30 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:671 [inline] wait_on_page_read mm/filemap.c:2955 [inline] do_read_cache_page+0x957/0x1390 mm/filemap.c:2998 read_mapping_page include/linux/pagemap.h:497 [inline] read_part_sector+0xf6/0x5b0 block/partitions/core.c:780 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x456/0xe40 block/partitions/core.c:708 bdev_disk_changed+0x1ec/0x400 fs/block_dev.c:1417 __blkdev_get+0xee4/0x1870 fs/block_dev.c:1546 blkdev_get+0xd1/0x240 fs/block_dev.c:1634 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1751 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3369 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417921 Code: Unable to access opcode bytes at RIP 0x4178f7. RSP: 002b:00007f6e9c306820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f6e9c306850 RBP: 000000000118c008 R08: 000000000000000f R09: 0000000000000000 R10: 00007f6e9c3079d0 R11: 0000000000000293 R12: 000000000118bfd4 R13: 00007ffc3c0e9d5f R14: 00007f6e9c3079c0 R15: 000000000118bfd4 INFO: task syz-executor.2:14182 blocked for more than 144 seconds. Not tainted 5.9.0-rc8-next-20201008-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26504 pid:14182 ppid: 6927 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4522 schedule+0xcf/0x270 kernel/sched/core.c:4600 io_schedule+0xb5/0x120 kernel/sched/core.c:6294 wait_on_page_bit_common+0x32a/0xe30 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:671 [inline] wait_on_page_read mm/filemap.c:2955 [inline] do_read_cache_page+0x957/0x1390 mm/filemap.c:2998 read_mapping_page include/linux/pagemap.h:497 [inline] read_part_sector+0xf6/0x5b0 block/partitions/core.c:780 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x456/0xe40 block/partitions/core.c:708 bdev_disk_changed+0x1ec/0x400 fs/block_dev.c:1417 __blkdev_get+0xee4/0x1870 fs/block_dev.c:1546 blkdev_get+0xd1/0x240 fs/block_dev.c:1634 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1751 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3369 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417921 Code: Unable to access opcode bytes at RIP 0x4178f7. RSP: 002b:00007f6e9c306820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f6e9c306850 RBP: 000000000118c008 R08: 000000000000000f R09: 0000000000000000 R10: 00007f6e9c3079d0 R11: 0000000000000293 R12: 000000000118bfd4 R13: 00007ffc3c0e9d5f R14: 00007f6e9c3079c0 R15: 000000000118bfd4 INFO: task systemd-udevd:14202 blocked for more than 144 seconds. Not tainted 5.9.0-rc8-next-20201008-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:28136 pid:14202 ppid: 3923 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4522 schedule+0xcf/0x270 kernel/sched/core.c:4600 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4659 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 __blkdev_get+0x457/0x1870 fs/block_dev.c:1479 blkdev_get+0xd1/0x240 fs/block_dev.c:1634 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1751 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3369 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd9e4eb6840 Code: Unable to access opcode bytes at RIP 0x7fd9e4eb6816. RSP: 002b:00007fff000148c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000056054edbcf60 RCX: 00007fd9e4eb6840 RDX: 000056054d0f3fe3 RSI: 00000000000a0800 RDI: 000056054edb7ec0 RBP: 00007fff00014a40 R08: 000056054d0f3670 R09: 0000000000000010 R10: 000056054d0f3d0c R11: 0000000000000246 R12: 00007fff00014990 R13: 000056054edac740 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by khungtaskd/1178: #0: ffffffff8a554da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6242 1 lock held by in:imklog/6753: #0: ffff8880112c41b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 1 lock held by syz-executor.2/14167: #0: ffff88802e791140 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1802 1 lock held by syz-executor.2/14182: #0: ffff88802e791140 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1479 1 lock held by systemd-udevd/14202: #0: ffff88802e791140 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1479 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1178 Comm: khungtaskd Not tainted 5.9.0-rc8-next-20201008-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+0x198/0x1fb lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3918 Comm: systemd-journal Not tainted 5.9.0-rc8-next-20201008-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:migrate_disable include/linux/preempt.h:308 [inline] RIP: 0010:bpf_prog_run_pin_on_cpu include/linux/filter.h:596 [inline] RIP: 0010:seccomp_run_filters kernel/seccomp.c:328 [inline] RIP: 0010:__seccomp_filter+0x10f/0x1510 kernel/seccomp.c:941 Code: 0f 84 80 0b 00 00 e8 d0 88 ff ff 48 8d 7b 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 12 11 00 00 bf 01 00 00 00 48 8b 6b 18 ec 61 da ff 31 d2 be 55 02 00 00 48 c7 c7 c0 06 b0 88 e8 99 a6 RSP: 0018:ffffc90004997d90 EFLAGS: 00000246 RAX: 1ffff11004ca7583 RBX: ffff88802653ac00 RCX: 1ffff92000932ff3 RDX: ffff888026402200 RSI: ffffffff8175d210 RDI: 0000000000000001 RBP: ffffc90000e1f000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000564c1e5ea1e0 R15: ffffc90004997e38 FS: 00007f64f3b468c0(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f64f0f6f000 CR3: 000000002653f000 CR4: 00000000001506f0 Call Trace: __secure_computing+0xfc/0x360 kernel/seccomp.c:1074 syscall_trace_enter.constprop.0+0x80/0x250 kernel/entry/common.c:58 do_syscall_64+0xf/0x70 arch/x86/entry/common.c:41 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f64f2ddff17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffc242a1b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 0000564c1e5ea1e0 RCX: 00007f64f2ddff17 RDX: 00007ffc242a1c30 RSI: 0000000000000000 RDI: 0000564c1e5ea1e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000206 R12: 00007ffc242a1c30 R13: 0000000000000f4e R14: 00007ffc242a4a20 R15: 00007ffc242a2030