INFO: task systemd-udevd:9931 blocked for more than 143 seconds. Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D27816 9931 4079 0x00000100 Call Trace: context_switch kernel/sched/core.c:3397 [inline] __schedule+0x8ea/0x1f70 kernel/sched/core.c:4122 schedule+0xd0/0x2a0 kernel/sched/core.c:4197 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4256 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 blkdev_get+0x41/0x2b0 fs/block_dev.c:1730 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1869 do_dentry_open+0x4b6/0x11a0 fs/open.c:822 do_open fs/namei.c:3234 [inline] path_openat+0x1e9e/0x27d0 fs/namei.c:3351 do_filp_open+0x192/0x260 fs/namei.c:3378 do_sys_openat2+0x585/0x7a0 fs/open.c:1173 do_sys_open+0xc3/0x140 fs/open.c:1189 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:353 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f2eed8b3840 Code: Bad RIP value. RSP: 002b:00007ffcc0901a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005614c33076b0 RCX: 00007f2eed8b3840 RDX: 00005614c144efe3 RSI: 00000000000a0800 RDI: 00005614c32f53d0 RBP: 00007ffcc0901bc0 R08: 00005614c144e670 R09: 0000000000000010 R10: 00005614c144ed0c R11: 0000000000000246 R12: 00007ffcc0901b10 R13: 00005614c33074a0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.1:10473 can't die for more than 143 seconds. syz-executor.1 D26456 10473 7159 0x00004004 Call Trace: context_switch kernel/sched/core.c:3397 [inline] __schedule+0x8ea/0x1f70 kernel/sched/core.c:4122 schedule+0xd0/0x2a0 kernel/sched/core.c:4197 io_schedule+0x17/0x60 kernel/sched/core.c:5840 wait_on_page_bit_common+0x351/0xdb0 mm/filemap.c:1123 wait_on_page_bit mm/filemap.c:1172 [inline] wait_on_page_locked include/linux/pagemap.h:635 [inline] wait_on_page_read mm/filemap.c:2767 [inline] do_read_cache_page+0x83a/0x1030 mm/filemap.c:2810 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x600 block/partitions/core.c:771 adfspart_check_ICS+0x9d/0xc80 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x474/0xe40 block/partitions/core.c:699 bdev_disk_changed+0x1fb/0x380 fs/block_dev.c:1525 __blkdev_get+0x130c/0x1530 fs/block_dev.c:1663 blkdev_get+0x41/0x2b0 fs/block_dev.c:1730 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1869 do_dentry_open+0x4b6/0x11a0 fs/open.c:822 do_open fs/namei.c:3234 [inline] path_openat+0x1e9e/0x27d0 fs/namei.c:3351 do_filp_open+0x192/0x260 fs/namei.c:3378 do_sys_openat2+0x585/0x7a0 fs/open.c:1173 do_sys_open+0xc3/0x140 fs/open.c:1189 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:353 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f7a9ba087a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f7a9ba08850 RBP: 000000000078bf00 R08: 00007f7a9ba087b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f7a9ba096d4 INFO: task syz-executor.1:10473 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D26456 10473 7159 0x00004004 Call Trace: context_switch kernel/sched/core.c:3397 [inline] __schedule+0x8ea/0x1f70 kernel/sched/core.c:4122 schedule+0xd0/0x2a0 kernel/sched/core.c:4197 io_schedule+0x17/0x60 kernel/sched/core.c:5840 wait_on_page_bit_common+0x351/0xdb0 mm/filemap.c:1123 wait_on_page_bit mm/filemap.c:1172 [inline] wait_on_page_locked include/linux/pagemap.h:635 [inline] wait_on_page_read mm/filemap.c:2767 [inline] do_read_cache_page+0x83a/0x1030 mm/filemap.c:2810 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x600 block/partitions/core.c:771 adfspart_check_ICS+0x9d/0xc80 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x474/0xe40 block/partitions/core.c:699 bdev_disk_changed+0x1fb/0x380 fs/block_dev.c:1525 __blkdev_get+0x130c/0x1530 fs/block_dev.c:1663 blkdev_get+0x41/0x2b0 fs/block_dev.c:1730 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1869 do_dentry_open+0x4b6/0x11a0 fs/open.c:822 do_open fs/namei.c:3234 [inline] path_openat+0x1e9e/0x27d0 fs/namei.c:3351 do_filp_open+0x192/0x260 fs/namei.c:3378 do_sys_openat2+0x585/0x7a0 fs/open.c:1173 do_sys_open+0xc3/0x140 fs/open.c:1189 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:353 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f7a9ba087a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f7a9ba08850 RBP: 000000000078bf00 R08: 00007f7a9ba087b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f7a9ba096d4 INFO: task syz-executor.1:10474 can't die for more than 144 seconds. syz-executor.1 D27312 10474 7159 0x00004006 Call Trace: context_switch kernel/sched/core.c:3397 [inline] __schedule+0x8ea/0x1f70 kernel/sched/core.c:4122 schedule+0xd0/0x2a0 kernel/sched/core.c:4197 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4256 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1920 blkdev_close+0x8c/0xb0 fs/block_dev.c:1969 __fput+0x33e/0x880 fs/file_table.c:281 task_work_run+0xe0/0x1a0 kernel/task_work.c:123 get_signal+0x205a/0x24f0 kernel/signal.c:2533 do_signal+0x81/0x2240 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:206 [inline] __prepare_exit_to_usermode+0x175/0x220 arch/x86/entry/common.c:240 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:362 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f7a9b9e7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 00000000004e9080 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000409 R14: 00000000004c6c64 R15: 00007f7a9b9e86d4 INFO: task syz-executor.1:10474 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27312 10474 7159 0x00004006 Call Trace: context_switch kernel/sched/core.c:3397 [inline] __schedule+0x8ea/0x1f70 kernel/sched/core.c:4122 schedule+0xd0/0x2a0 kernel/sched/core.c:4197 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4256 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1920 blkdev_close+0x8c/0xb0 fs/block_dev.c:1969 __fput+0x33e/0x880 fs/file_table.c:281 task_work_run+0xe0/0x1a0 kernel/task_work.c:123 get_signal+0x205a/0x24f0 kernel/signal.c:2533 do_signal+0x81/0x2240 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:206 [inline] __prepare_exit_to_usermode+0x175/0x220 arch/x86/entry/common.c:240 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:362 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f7a9b9e7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 00000000004e9080 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000409 R14: 00000000004c6c64 R15: 00007f7a9b9e86d4 Showing all locks held in the system: 3 locks held by kworker/u4:3/197: 1 lock held by khungtaskd/1149: #0: ffffffff899bfd40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 2 locks held by agetty/6927: #0: ffff888096f17098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f502e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/2281: #0: ffff88808a339300 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 1 lock held by syz-executor.1/2300: #0: ffff88808a339300 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 1 lock held by systemd-udevd/9931: #0: ffff88808a339300 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by syz-executor.1/10473: #0: ffff88808a339300 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by syz-executor.1/10474: #0: ffff88808a339300 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1149 Comm: khungtaskd Not tainted 5.7.0-rc7-next-20200525-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+0x1e6/0x221 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+0xf97/0x14e0 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:350 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4066 Comm: systemd-journal Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7f56ae90e028 Code: 10 0f 11 57 20 0f 11 5f 30 0f 11 64 17 f0 0f 11 6c 17 e0 0f 11 74 17 d0 0f 11 7c 17 c0 c3 0f 10 06 0f 10 4e 10 0f 10 54 16 f0 <0f> 10 5c 16 e0 0f 11 07 0f 11 4f 10 0f 11 54 17 f0 0f 11 5c 17 e0 RSP: 002b:00007fffee548dd8 EFLAGS: 00000283 RAX: 000055b8df9b3090 RBX: 0000000000000026 RCX: 00007f56aec23b00 RDX: 0000000000000026 RSI: 000055b8df9bcfe0 RDI: 000055b8df9b3090 RBP: 0000000000000026 R08: 00000000000000fc R09: 0000000000000030 R10: 0000000000000075 R11: 00000000fffffff6 R12: 00007fffee549040 R13: 000055b8df9bcfe0 R14: 00007fffee548f18 R15: 0000000000000001 FS: 00007f56af6a98c0 GS: 0000000000000000