INFO: task syz-executor.2:15149 blocked for more than 143 seconds. Not tainted 5.10.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29040 pid:15149 ppid: 13943 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4528 schedule+0xcf/0x270 kernel/sched/core.c:4606 request_wait_answer+0x552/0x840 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xd10 fs/fuse/dev.c:515 fuse_do_getattr+0x243/0xcb0 fs/fuse/dir.c:1029 fuse_update_get_attr fs/fuse/dir.c:1065 [inline] fuse_getattr+0x3b0/0x470 fs/fuse/dir.c:1801 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:3121 [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: 0033:0x45e159 RSP: 002b:00007f1e0c059c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd14626b9f R14: 00007f1e0c05a9c0 R15: 000000000119bf8c INFO: task syz-executor.5:15180 blocked for more than 143 seconds. Not tainted 5.10.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29040 pid:15180 ppid: 13944 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4528 schedule+0xcf/0x270 kernel/sched/core.c:4606 request_wait_answer+0x552/0x840 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xd10 fs/fuse/dev.c:515 fuse_do_getattr+0x243/0xcb0 fs/fuse/dir.c:1029 fuse_update_get_attr fs/fuse/dir.c:1065 [inline] fuse_getattr+0x3b0/0x470 fs/fuse/dir.c:1801 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:3121 [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: 0033:0x45e159 RSP: 002b:00007f8a12d47c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fffc291c30f R14: 00007f8a12d489c0 R15: 000000000119bf8c INFO: task syz-executor.2:15182 blocked for more than 143 seconds. Not tainted 5.10.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29040 pid:15182 ppid: 13943 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4528 schedule+0xcf/0x270 kernel/sched/core.c:4606 request_wait_answer+0x552/0x840 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xd10 fs/fuse/dev.c:515 fuse_do_getattr+0x243/0xcb0 fs/fuse/dir.c:1029 fuse_update_get_attr fs/fuse/dir.c:1065 [inline] fuse_getattr+0x3b0/0x470 fs/fuse/dir.c:1801 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:3121 [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: 0033:0x45e159 RSP: 002b:00007f1e0c059c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd14626b9f R14: 00007f1e0c05a9c0 R15: 000000000119bf8c INFO: task syz-executor.5:15191 blocked for more than 144 seconds. Not tainted 5.10.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29040 pid:15191 ppid: 13944 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3779 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4528 schedule+0xcf/0x270 kernel/sched/core.c:4606 request_wait_answer+0x552/0x840 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xd10 fs/fuse/dev.c:515 fuse_do_getattr+0x243/0xcb0 fs/fuse/dir.c:1029 fuse_update_get_attr fs/fuse/dir.c:1065 [inline] fuse_getattr+0x3b0/0x470 fs/fuse/dir.c:1801 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:3121 [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: 0033:0x45e159 RSP: 002b:00007f8a12d47c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fffc291c30f R14: 00007f8a12d489c0 R15: 000000000119bf8c Showing all locks held in the system: 1 lock held by khungtaskd/1648: #0: ffffffff8b3378e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1648 Comm: khungtaskd Not tainted 5.10.0-rc7-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+0x107/0x163 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 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: 4885 Comm: systemd-journal Not tainted 5.10.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:desc_read+0x2a3/0x330 kernel/printk/printk_ringbuffer.c:533 Code: 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 53 4d 89 34 24 48 83 c4 20 44 89 f8 5b 5d 41 5c 41 5d 41 5e <41> 5f c3 e8 55 34 17 00 eb ba 48 89 ef e8 9b b1 58 00 e9 b4 fd ff RSP: 0018:ffffc9000159fae0 EFLAGS: 00000086 RAX: 0000000000000003 RBX: 00000000ffffe002 RCX: ffffffff8158cfe9 RDX: 1ffff920002b3f8a RSI: 0000000000000008 RDI: ffffc9000159fc50 RBP: ffffc9000159fc50 R08: 0000000000000001 R09: ffffc9000159fc57 R10: fffff520002b3f8a R11: 0000000000000000 R12: 1ffff920002b3f5e R13: 0000000000000002 R14: ffffffff8b2489c0 R15: 0000000000000003 FS: 00007fd8845158c0(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd881a75028 CR3: 000000002034c000 CR4: 0000000000350ef0 Call Trace: desc_read_finalized_seq+0x81/0x1c0 kernel/printk/printk_ringbuffer.c:1754 prb_read kernel/printk/printk_ringbuffer.c:1802 [inline] _prb_read_valid+0x1a1/0x6d0 kernel/printk/printk_ringbuffer.c:1882 prb_first_valid_seq+0x78/0xd0 kernel/printk/printk_ringbuffer.c:1987 devkmsg_read+0x274/0x740 kernel/printk/printk.c:785 vfs_read+0x1b5/0x570 fs/read_write.c:494 ksys_read+0x12d/0x250 fs/read_write.c:634 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd883aa5210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 RSP: 002b:00007fff465f0278 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fff465f2cf0 RCX: 00007fd883aa5210 RDX: 0000000000002000 RSI: 00007fff465f0af0 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000008 R09: 00007fff465f70f0 R10: 00000000000103de R11: 0000000000000246 R12: 00007fff465f0af0 R13: 00007fff465f2c48 R14: 0000557250d67958 R15: 0005b62a4aee92d8