INFO: task syz-executor.1:10390 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:27992 pid:10390 ppid: 8501 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0x893/0x2130 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+0x17e/0x1a0 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4177b1 Code: Unable to access opcode bytes at RIP 0x417787. RSP: 002b:00007ffc05999d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004177b1 RDX: 0000000000000000 RSI: 00000000000003ea RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000030ddc3ea R09: 0000000030ddc3ee R10: 00007ffc05999e30 R11: 0000000000000293 R12: 000000000118c9a0 R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118bf2c INFO: task syz-executor.1:10390 blocked for more than 143 seconds. Not tainted 5.9.0-next-20201023-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27992 pid:10390 ppid: 8501 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0x893/0x2130 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+0x17e/0x1a0 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4177b1 Code: Unable to access opcode bytes at RIP 0x417787. RSP: 002b:00007ffc05999d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00000000004177b1 RDX: 0000000000000000 RSI: 00000000000003ea RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000030ddc3ea R09: 0000000030ddc3ee R10: 00007ffc05999e30 R11: 0000000000000293 R12: 000000000118c9a0 R13: 000000000118c9a0 R14: 00000000000003e8 R15: 000000000118bf2c INFO: task syz-executor.1:10395 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:28208 pid:10395 ppid: 8501 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0x893/0x2130 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:672 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:3045 read_mapping_page include/linux/pagemap.h:498 [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: 0033:0x417951 Code: Unable to access opcode bytes at RIP 0x417927. RSP: 002b:00007f9c43a0b820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f9c43a0b850 RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bf2c R13: 00007ffc05999cdf R14: 00007f9c43a0c9c0 R15: 000000000118bf2c INFO: task syz-executor.1:10395 blocked for more than 144 seconds. Not tainted 5.9.0-next-20201023-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28208 pid:10395 ppid: 8501 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3773 [inline] __schedule+0x893/0x2130 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:672 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:3045 read_mapping_page include/linux/pagemap.h:498 [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: 0033:0x417951 Code: Unable to access opcode bytes at RIP 0x417927. RSP: 002b:00007f9c43a0b820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f9c43a0b850 RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bf2c R13: 00007ffc05999cdf R14: 00007f9c43a0c9c0 R15: 000000000118bf2c Showing all locks held in the system: 2 locks held by kworker/u4:4/159: 1 lock held by khungtaskd/1655: #0: ffffffff8b3361a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8187: #0: ffff888013d840f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 1 lock held by syz-executor.1/10390: #0: ffff88814080d500 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1802 1 lock held by syz-executor.1/10395: #0: ffff88814080d500 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1479 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.9.0-next-20201023-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+0x107/0x163 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: 4895 Comm: systemd-journal Not tainted 5.9.0-next-20201023-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:task_stack_page include/linux/sched/task_stack.h:21 [inline] RIP: 0010:populate_seccomp_data kernel/seccomp.c:204 [inline] RIP: 0010:__seccomp_filter+0x7a9/0x1510 kernel/seccomp.c:937 Code: ff ff 41 bc ff ff ff ff e9 c5 fa ff ff e8 7f 85 ff ff 65 48 8b 1c 25 00 f0 01 00 48 8d 7b 18 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 26 0c 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 7b 18 4c 8d RSP: 0018:ffffc900015ffd90 EFLAGS: 00000246 RAX: 1ffff1100237c353 RBX: ffff888011be1a80 RCX: ffffffff817007aa RDX: ffff888011be1a80 RSI: ffffffff816fd161 RDI: ffff888011be1a98 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000027 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff9583e68c0(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff955817000 CR3: 000000001113a000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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: 0033:0x7ff95767ff17 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:00007ffc281651b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 000055fad06581e0 RCX: 00007ff95767ff17 RDX: 00007ffc28165270 RSI: 0000000000000000 RDI: 000055fad06581e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000202 R12: 00007ffc28165270 R13: 000000000000131f R14: 00007ffc28168060 R15: 00007ffc28165670