INFO: task syz-executor.1:29169 can't die for more than 143 seconds. syz-executor.1 D28520 29169 6967 0x00004004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 io_schedule+0xb5/0x120 kernel/sched/core.c:5935 wait_on_page_bit_common+0x34f/0xda0 mm/filemap.c:1124 wait_on_page_bit mm/filemap.c:1173 [inline] wait_on_page_locked include/linux/pagemap.h:643 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:2872 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:772 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:700 bdev_disk_changed+0x1ea/0x370 fs/block_dev.c:1488 __blkdev_get+0x142b/0x16e0 fs/block_dev.c:1624 blkdev_get+0x45/0x4d0 fs/block_dev.c:1689 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1831 do_dentry_open+0x4b9/0x11b0 fs/open.c:822 do_open fs/namei.c:3249 [inline] path_openat+0x1bb9/0x2750 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3393 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173 do_sys_open fs/open.c:1189 [inline] ksys_open include/linux/syscalls.h:1398 [inline] __do_sys_open fs/open.c:1195 [inline] __se_sys_open fs/open.c:1193 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1193 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416921 Code: Bad RIP value. RSP: 002b:00007f697bec27a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f697bec2850 RBP: 000000000078bf00 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c9c R14: 00000000004cee26 R15: 00007f697bec36d4 INFO: task syz-executor.1:29169 blocked for more than 143 seconds. Not tainted 5.8.0-rc5-next-20200715-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28520 29169 6967 0x00004004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 io_schedule+0xb5/0x120 kernel/sched/core.c:5935 wait_on_page_bit_common+0x34f/0xda0 mm/filemap.c:1124 wait_on_page_bit mm/filemap.c:1173 [inline] wait_on_page_locked include/linux/pagemap.h:643 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:2872 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:772 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:700 bdev_disk_changed+0x1ea/0x370 fs/block_dev.c:1488 __blkdev_get+0x142b/0x16e0 fs/block_dev.c:1624 blkdev_get+0x45/0x4d0 fs/block_dev.c:1689 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1831 do_dentry_open+0x4b9/0x11b0 fs/open.c:822 do_open fs/namei.c:3249 [inline] path_openat+0x1bb9/0x2750 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3393 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173 do_sys_open fs/open.c:1189 [inline] ksys_open include/linux/syscalls.h:1398 [inline] __do_sys_open fs/open.c:1195 [inline] __se_sys_open fs/open.c:1193 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1193 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416921 Code: Bad RIP value. RSP: 002b:00007f697bec27a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f697bec2850 RBP: 000000000078bf00 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c9c R14: 00000000004cee26 R15: 00007f697bec36d4 INFO: task syz-executor.1:29175 can't die for more than 144 seconds. syz-executor.1 D28736 29175 6967 0x00000004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4303 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10d0 kernel/locking/mutex.c:1103 __blkdev_get+0x164/0x16e0 fs/block_dev.c:1543 blkdev_get+0x45/0x4d0 fs/block_dev.c:1689 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1831 do_dentry_open+0x4b9/0x11b0 fs/open.c:822 do_open fs/namei.c:3249 [inline] path_openat+0x1bb9/0x2750 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3393 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173 do_sys_open fs/open.c:1189 [inline] ksys_open include/linux/syscalls.h:1398 [inline] __do_sys_open fs/open.c:1195 [inline] __se_sys_open fs/open.c:1193 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1193 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416921 Code: Bad RIP value. RSP: 002b:00007f697be5f7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f697be5f850 RBP: 000000000078c0e0 R08: 000000000000000f R09: 0000000000000000 R10: 00007f697be609d0 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c9c R14: 00000000004cee26 R15: 00007f697be606d4 INFO: task syz-executor.1:29175 blocked for more than 144 seconds. Not tainted 5.8.0-rc5-next-20200715-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28736 29175 6967 0x00000004 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4303 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10d0 kernel/locking/mutex.c:1103 __blkdev_get+0x164/0x16e0 fs/block_dev.c:1543 blkdev_get+0x45/0x4d0 fs/block_dev.c:1689 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1831 do_dentry_open+0x4b9/0x11b0 fs/open.c:822 do_open fs/namei.c:3249 [inline] path_openat+0x1bb9/0x2750 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3393 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173 do_sys_open fs/open.c:1189 [inline] ksys_open include/linux/syscalls.h:1398 [inline] __do_sys_open fs/open.c:1195 [inline] __se_sys_open fs/open.c:1193 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1193 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416921 Code: Bad RIP value. RSP: 002b:00007f697be5f7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416921 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f697be5f850 RBP: 000000000078c0e0 R08: 000000000000000f R09: 0000000000000000 R10: 00007f697be609d0 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c9c R14: 00000000004cee26 R15: 00007f697be606d4 Showing all locks held in the system: 1 lock held by khungtaskd/1163: #0: ffffffff89c53980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by in:imklog/6641: #0: ffff88809508b3b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 1 lock held by syz-executor.5/10663: #0: ffff888093b5f468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:66 [inline] #0: ffff888093b5f468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:74 1 lock held by syz-executor.1/29169: #0: ffff88808a913240 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x164/0x16e0 fs/block_dev.c:1543 1 lock held by syz-executor.1/29175: #0: ffff88808a913240 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x164/0x16e0 fs/block_dev.c:1543 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1163 Comm: khungtaskd Not tainted 5.8.0-rc5-next-20200715-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+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x223 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+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3902 Comm: systemd-journal Not tainted 5.8.0-rc5-next-20200715-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7f3204797930 Code: Bad RIP value. RSP: 002b:00007fff293331b8 EFLAGS: 00000206 RAX: 00007fff29333310 RBX: 00007fff29335e40 RCX: 00007fff293332f8 RDX: 000056080b64efc8 RSI: 0000000000000001 RDI: 0000000000000064 RBP: 0000000000000000 R08: 00007fff29333c50 R09: 0000000000000000 R10: 0000000000000000 R11: 00007f32048c4040 R12: 00007fff29333420 R13: 000056080b64efc8 R14: 00007fff293332f8 R15: 0000000000000001 FS: 00007f32055978c0 GS: 0000000000000000