INFO: task syz-executor.1:20753 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:29048 pid:20753 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20753 blocked for more than 143 seconds. Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29048 pid:20753 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20775 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:29048 pid:20775 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20775 blocked for more than 144 seconds. Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29048 pid:20775 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20796 can't die for more than 144 seconds. task:syz-executor.1 state:D stack:29048 pid:20796 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20796 blocked for more than 144 seconds. Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29048 pid:20796 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20812 can't die for more than 144 seconds. task:syz-executor.1 state:D stack:29048 pid:20812 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c INFO: task syz-executor.1:20812 blocked for more than 145 seconds. Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29048 pid:20812 ppid: 13649 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3772 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4521 schedule+0xcf/0x270 kernel/sched/core.c:4599 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3148 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dea9 Code: Bad RIP value. RSP: 002b:00007fa21c40cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045dea9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd3347a37f R14: 00007fa21c40d9c0 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1183: #0: ffffffff8a554ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6242 1 lock held by in:imklog/6725: #0: ffff8880a64b1170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 2 locks held by rs:main Q:Reg/6727: #0: ffff8880a6bbb3b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 #1: ffff888098b94460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2757 [inline] #1: ffff888098b94460 (sb_writers#4){.+.+}-{0:0}, at: vfs_write+0x521/0x700 fs/read_write.c:599 2 locks held by agetty/6796: #0: ffff8880a063e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc90000f842e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a70 drivers/tty/n_tty.c:2156 3 locks held by kworker/u4:1/11093: #0: ffff8880ae436058 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x789/0xe50 kernel/sched/fair.c:10574 #1: ffff8880ae420ec8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 #2: ffffffff8a554ae0 (rcu_read_lock){....}-{1:2}, at: trace_sched_stat_runtime include/trace/events/sched.h:435 [inline] #2: ffffffff8a554ae0 (rcu_read_lock){....}-{1:2}, at: update_curr+0x2e1/0x840 kernel/sched/fair.c:869 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1183 Comm: khungtaskd Not tainted 5.9.0-rc7-next-20201002-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+0x198/0x1fb 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: 3925 Comm: systemd-journal Not tainted 5.9.0-rc7-next-20201002-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:slab_pre_alloc_hook mm/slab.h:494 [inline] RIP: 0010:slab_alloc mm/slab.c:3300 [inline] RIP: 0010:kmem_cache_alloc+0x3ab/0x540 mm/slab.c:3484 Code: 10 48 8b 54 d0 10 48 85 d2 0f 85 82 fd ff ff 89 de 48 89 ef 65 8b 15 04 57 4c 7e e8 9f f4 ff ff 48 89 c2 e9 69 fd ff ff 31 d2 ee 01 00 00 48 c7 c7 2d d6 da 89 e8 e4 bf 99 ff 89 de 48 89 ef RSP: 0018:ffffc90005457a48 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000dc0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8a65e7a0 RDI: 0000000000000286 RBP: ffff8880aa2a5c00 R08: 0000000000000001 R09: ffff8880933f6d08 R10: fffffbfff176b3c1 R11: 0000000000000000 R12: 0000000000000400 R13: 0000000000000dc0 R14: 0000000000000000 R15: 00000000ffffff9c FS: 00007fef9189d8c0(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef8edb6000 CR3: 00000000930c9000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmem_cache_zalloc include/linux/slab.h:656 [inline] __alloc_file+0x21/0x350 fs/file_table.c:101 alloc_empty_file+0x6d/0x170 fs/file_table.c:151 path_openat+0xe3/0x2730 fs/namei.c:3355 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: 0033:0x7fef90e2d840 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:00007ffd41aeeb08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffd41aeee10 RCX: 00007fef90e2d840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055c4d9a6b780 RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055c4d9a67040 R14: 00007ffd41aeedd0 R15: 000055c4d9a73fc0