INFO: task syz-executor714:6870 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor714 state:D stack:27776 pid: 6870 ppid: 6859 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 io_schedule+0xb5/0x120 kernel/sched/core.c:6296 wait_on_page_bit_common+0x52c/0xca0 mm/filemap.c:1191 wait_on_page_bit mm/filemap.c:1216 [inline] wait_on_page_locked include/linux/pagemap.h:611 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:2915 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:770 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x44b/0xe10 block/partitions/core.c:698 bdev_disk_changed+0x1ea/0x370 fs/block_dev.c:1416 __blkdev_get+0xee4/0x1aa0 fs/block_dev.c:1559 blkdev_get fs/block_dev.c:1639 [inline] blkdev_open+0x227/0x300 fs/block_dev.c:1753 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 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: 0033:0x405811 Code: Bad RIP value. RSP: 002b:00007f5b345c8980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405811 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5b345c8990 RBP: 6666666666666667 R08: 000000000000000f R09: 00007f5b345c9700 R10: 00007f5b345c99d0 R11: 0000000000000293 R12: 00000000006dbc4c R13: 00007fff862724ff R14: 00007f5b345c99c0 R15: 20c49ba5e353f7cf INFO: task syz-executor714:6871 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor714 state:D stack:28744 pid: 6871 ppid: 6859 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 blkdev_get fs/block_dev.c:1639 [inline] blkdev_open+0x227/0x300 fs/block_dev.c:1753 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 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: 0033:0x405811 Code: Bad RIP value. RSP: 002b:00007f5b345a7980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405811 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5b345a7990 RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dbc5c R13: 00007fff862724ff R14: 00007f5b345a89c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: 1 lock held by khungtaskd/1169: #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 2 locks held by in:imklog/6549: 1 lock held by syz-executor714/6870: #0: ffff88808ab7a380 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 1 lock held by syz-executor714/6871: #0: ffff88808ab7a380 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1169 Comm: khungtaskd Not tainted 5.9.0-rc1-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+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3897 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7f44005e56c9 Code: d7 d1 66 44 0f d7 c2 66 0f d7 cb 48 c1 e2 10 48 c1 e1 10 4c 09 c1 48 c1 e1 20 48 09 ca 48 89 f9 48 31 c1 48 83 e0 c0 48 d3 fa <48> 85 d2 0f 84 7e 00 00 00 48 0f bc c2 c3 66 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd4f611638 EFLAGS: 00000206 RAX: 0000565111e157c0 RBX: 00007ffd4f6140b0 RCX: 0000000000000000 RDX: 000000fffefe0000 RSI: 0000000000000000 RDI: 0000565111e157d0 RBP: 0000000000000000 R08: 00000000000000ff R09: 0000000000000000 R10: 0000000000000069 R11: 00000000ffffffff R12: 0000000000000030 R13: 0000000000000020 R14: 0000000000000004 R15: 0005ad98200e2cb3 FS: 00007f44013848c0 GS: 0000000000000000