INFO: task syz-executor.5:30666 can't die for more than 143 seconds. syz-executor.5 D26600 30666 7396 0x00004004 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f36327b37a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f36327b3850 RBP: 000000000078bf00 R08: 00007f36327b37b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f36327b46d4 INFO: task syz-executor.5:30666 blocked for more than 143 seconds. Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D26600 30666 7396 0x00004004 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f36327b37a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f36327b3850 RBP: 000000000078bf00 R08: 00007f36327b37b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f36327b46d4 INFO: task syz-executor.5:30671 can't die for more than 143 seconds. syz-executor.5 D28616 30671 7396 0x00004006 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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:00007f3632792c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 00000000004e9080 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000409 R14: 00000000004c6c64 R15: 00007f36327936d4 INFO: task syz-executor.5:30671 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28616 30671 7396 0x00004006 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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:00007f3632792c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 00000000004e9080 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000409 R14: 00000000004c6c64 R15: 00007f36327936d4 INFO: task syz-executor.5:30674 can't die for more than 144 seconds. syz-executor.5 D28352 30674 7396 0x00000004 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f36327717a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f3632771850 RBP: 000000000078c040 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f36327726d4 INFO: task syz-executor.5:30674 blocked for more than 144 seconds. Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28352 30674 7396 0x00000004 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4293 __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: 0033:0x416821 Code: Bad RIP value. RSP: 002b:00007f36327717a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416821 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f3632771850 RBP: 000000000078c040 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c0f R14: 00000000004ce59d R15: 00007f36327726d4 INFO: task systemd-udevd:30678 blocked for more than 145 seconds. Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D26576 30678 3883 0x00004100 Call Trace: context_switch kernel/sched/core.c:3434 [inline] __schedule+0x8ea/0x1fa0 kernel/sched/core.c:4159 schedule+0xd0/0x2a0 kernel/sched/core.c:4234 io_schedule+0x17/0x60 kernel/sched/core.c:5877 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: 0033:0x7f50db242840 Code: Bad RIP value. RSP: 002b:00007fff93be9ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005629cb439cd0 RCX: 00007f50db242840 RDX: 00005629cb2c7fe3 RSI: 00000000000a0800 RDI: 00005629cb439b30 RBP: 00007fff93be9c30 R08: 00005629cb2c7670 R09: 0000000000000010 R10: 00005629cb2c7d0c R11: 0000000000000246 R12: 00007fff93be9b80 R13: 00005629cb43dee0 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by ksoftirqd/0/9: #0: ffff8880ae637d58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1263 [inline] #0: ffff8880ae637d58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x233/0x1fa0 kernel/sched/core.c:4105 1 lock held by khungtaskd/1143: #0: ffffffff899bfd00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by systemd-journal/3873: #0: ffff8880ae637d58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1263 [inline] #0: ffff8880ae637d58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x233/0x1fa0 kernel/sched/core.c:4105 1 lock held by in:imklog/6672: #0: ffff888092df4b30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 2 locks held by rs:main Q:Reg/6673: 2 locks held by agetty/6734: #0: ffff88809df52098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f642e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 2 locks held by agetty/6744: #0: ffff88809778a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f602e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.5/14401: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 1 lock held by syz-executor.5/14426: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 1 lock held by syz-executor.5/30666: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by syz-executor.5/30671: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 1 lock held by syz-executor.5/30674: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by systemd-udevd/30678: #0: ffff88808a990140 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1143 Comm: khungtaskd Not tainted 5.7.0-rc7-next-20200526-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3873 Comm: systemd-journal Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x3f/0x220 lib/smp_processor_id.c:55 Code: c7 5f 26 78 65 8b 1d 28 cb 26 78 81 e3 ff ff ff 7f 31 ff 89 de e8 e1 98 97 f9 85 db 74 0f e8 38 97 97 f9 44 89 e8 5b 5d 41 5c <41> 5d c3 e8 29 97 97 f9 48 c7 c0 f8 c8 94 89 48 ba 00 00 00 00 00 RSP: 0018:ffffc900015775b8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff87db53af RDX: 0000000000000000 RSI: ffffffff87db53b8 RDI: 0000000000000005 RBP: 00007eff43214840 R08: ffff888093844280 R09: ffffed1015cc718c R10: ffff8880ae638c5b R11: ffffed1015cc718b R12: ffffc90001577700 R13: 0000000000000000 R14: ffff888093844280 R15: ffff8880a89f3baf FS: 00007eff43c848c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007eff41228000 CR3: 0000000094385000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:299 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:965 rcu_read_unlock include/linux/rcupdate.h:684 [inline] is_bpf_text_address+0xdd/0x160 kernel/bpf/core.c:706 kernel_text_address+0x6e/0xe0 kernel/extable.c:151 __kernel_text_address+0x9/0x30 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:317 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:312 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc mm/kasan/common.c:494 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:467 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x11b/0x740 mm/slab.c:3484 kmem_cache_zalloc include/linux/slab.h:659 [inline] lsm_file_alloc security/security.c:567 [inline] security_file_alloc+0x34/0x160 security/security.c:1440 __alloc_file+0xd8/0x350 fs/file_table.c:106 alloc_empty_file+0x6d/0x170 fs/file_table.c:151 path_openat+0xe3/0x27d0 fs/namei.c:3337 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: 0033:0x7eff43214840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fffb844ac08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fffb844af10 RCX: 00007eff43214840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055c8a6d72fe0 RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055c8a6d66040 R14: 00007fffb844aed0 R15: 000055c8a6d72930