INFO: task syz-executor.1:26804 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:22720 pid:26804 ppid: 6555 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4756 [inline] __schedule+0x943/0x2700 kernel/sched/core.c:6029 schedule+0xd7/0x280 kernel/sched/core.c:6108 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6167 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa39/0x12f0 kernel/locking/mutex.c:729 tls_sw_sendpage+0x81/0xe0 net/tls/tls_sw.c:1276 inet_sendpage+0xd4/0x140 net/ipv4/af_inet.c:835 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3496 kernel_sendpage net/socket.c:3493 [inline] sock_sendpage+0xe9/0x150 net/socket.c:1003 pipe_to_sendpage+0x2b4/0x390 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x444/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd6/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x114/0x190 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1250 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0x1ce/0x210 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f2f1ba80188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000080010002000e R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd606fd4ff R14: 00007f2f1ba80300 R15: 0000000000022000 INFO: task syz-executor.1:26804 blocked for more than 143 seconds. Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:22720 pid:26804 ppid: 6555 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4756 [inline] __schedule+0x943/0x2700 kernel/sched/core.c:6029 schedule+0xd7/0x280 kernel/sched/core.c:6108 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6167 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa39/0x12f0 kernel/locking/mutex.c:729 tls_sw_sendpage+0x81/0xe0 net/tls/tls_sw.c:1276 inet_sendpage+0xd4/0x140 net/ipv4/af_inet.c:835 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3496 kernel_sendpage net/socket.c:3493 [inline] sock_sendpage+0xe9/0x150 net/socket.c:1003 pipe_to_sendpage+0x2b4/0x390 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x444/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd6/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x114/0x190 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1250 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0x1ce/0x210 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f2f1ba80188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000080010002000e R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd606fd4ff R14: 00007f2f1ba80300 R15: 0000000000022000 INFO: task syz-executor.3:26803 can't die for more than 144 seconds. task:syz-executor.3 state:D stack:24632 pid:26803 ppid: 6559 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4756 [inline] __schedule+0x943/0x2700 kernel/sched/core.c:6029 schedule+0xd7/0x280 kernel/sched/core.c:6108 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6167 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa39/0x12f0 kernel/locking/mutex.c:729 tls_sw_sendpage+0x81/0xe0 net/tls/tls_sw.c:1276 inet_sendpage+0xd4/0x140 net/ipv4/af_inet.c:835 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3496 kernel_sendpage net/socket.c:3493 [inline] sock_sendpage+0xe9/0x150 net/socket.c:1003 pipe_to_sendpage+0x2b4/0x390 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x444/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd6/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x114/0x190 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1250 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0x1ce/0x210 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007fac988ea188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000080010002000e R11: 0000000000000246 R12: 000000000056c038 R13: 00007fffc03d319f R14: 00007fac988ea300 R15: 0000000000022000 INFO: task syz-executor.3:26803 blocked for more than 144 seconds. Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24632 pid:26803 ppid: 6559 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4756 [inline] __schedule+0x943/0x2700 kernel/sched/core.c:6029 schedule+0xd7/0x280 kernel/sched/core.c:6108 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6167 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa39/0x12f0 kernel/locking/mutex.c:729 tls_sw_sendpage+0x81/0xe0 net/tls/tls_sw.c:1276 inet_sendpage+0xd4/0x140 net/ipv4/af_inet.c:835 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3496 kernel_sendpage net/socket.c:3493 [inline] sock_sendpage+0xe9/0x150 net/socket.c:1003 pipe_to_sendpage+0x2b4/0x390 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x444/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd6/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x114/0x190 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1250 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0x1ce/0x210 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007fac988ea188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000009 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 000080010002000e R11: 0000000000000246 R12: 000000000056c038 R13: 00007fffc03d319f R14: 00007fac988ea300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xccb/0xef0 kernel/hung_task.c:339 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2966 Comm: systemd-journal Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmem_cache_free+0x2a0/0x5b0 mm/slub.c:3476 Code: 8b 74 24 08 48 89 04 0e 48 8b 7d 00 40 f6 c7 0f 0f 85 2f 02 00 00 48 8d 4a 08 65 48 0f c7 0f 0f 94 c0 84 c0 74 b9 48 8b 4d 60 <48> 8b b4 24 88 00 00 00 0f 1f 44 00 00 65 8b 05 54 93 45 7e 83 f8 RSP: 0018:ffffc900022cfce8 EFLAGS: 00000246 RAX: 00000000360b5500 RBX: ffff8880360b5520 RCX: ffffffff89999400 RDX: 0000000000000000 RSI: ffffffff817cac31 RDI: ffffffff81bc5145 RBP: ffff8881400073c0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817cac18 R11: 0000000000000000 R12: ffffea0000d82c00 R13: ffff8880360b5500 R14: 00000000ffffff9c R15: dffffc0000000000 FS: 00007f21dbcb78c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f21d93cc000 CR3: 0000000025ee7000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: putname fs/namei.c:270 [inline] putname+0x118/0x160 fs/namei.c:256 do_sys_openat2+0x153/0x4e0 fs/open.c:1213 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f21db246840 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:00007ffd6e32e148 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffd6e32e450 RCX: 00007f21db246840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000056043bd9dfd0 RBP: 000000000000000d R08: 00000000000001e0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000056043bd91040 R14: 00007ffd6e32e410 R15: 000056043bd9ddf0 ---------------- Code disassembly (best guess): 0: 8b 74 24 08 mov 0x8(%rsp),%esi 4: 48 89 04 0e mov %rax,(%rsi,%rcx,1) 8: 48 8b 7d 00 mov 0x0(%rbp),%rdi c: 40 f6 c7 0f test $0xf,%dil 10: 0f 85 2f 02 00 00 jne 0x245 16: 48 8d 4a 08 lea 0x8(%rdx),%rcx 1a: 65 48 0f c7 0f cmpxchg16b %gs:(%rdi) 1f: 0f 94 c0 sete %al 22: 84 c0 test %al,%al 24: 74 b9 je 0xffffffdf 26: 48 8b 4d 60 mov 0x60(%rbp),%rcx * 2a: 48 8b b4 24 88 00 00 mov 0x88(%rsp),%rsi <-- trapping instruction 31: 00 32: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 37: 65 8b 05 54 93 45 7e mov %gs:0x7e459354(%rip),%eax # 0x7e459392 3e: 83 .byte 0x83 3f: f8 clc