nfs4: Unknown parameter '&'@\}' nfs4: Unknown parameter '&'@\}' INFO: task syz-executor.3:6799 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27952 pid: 6799 ppid: 285 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 perf_event_exit_task_context kernel/events/core.c:12457 [inline] perf_event_exit_task+0x2aa/0xda0 kernel/events/core.c:12523 do_exit+0xc2b/0x2770 kernel/exit.c:820 do_group_exit+0x125/0x310 kernel/exit.c:908 __do_sys_exit_group kernel/exit.c:919 [inline] __se_sys_exit_group kernel/exit.c:917 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:917 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f89b8e81b19 RSP: 002b:00007ffe412f99b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f89b8e81b19 RDX: 00007f89b8e3472b RSI: ffffffffffffffbc RDI: 0000000000000000 RBP: 0000000000000000 R08: 00007ffe41357090 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe412f9aa0 INFO: task syz-executor.3:6800 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27376 pid: 6800 ppid: 285 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 mutex_lock_double kernel/events/core.c:11664 [inline] __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] __do_sys_perf_event_open+0x1244/0x2cb0 kernel/events/core.c:11996 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f89b8e81b19 RSP: 002b:00007f89b63f7188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f89b8f94f60 RCX: 00007f89b8e81b19 RDX: 0000000000000000 RSI: 00000000000000e5 RDI: 0000000020001d80 RBP: 00007f89b8edbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe412f978f R14: 00007f89b63f7300 R15: 0000000000022000 INFO: task syz-executor.3:6816 blocked for more than 143 seconds. Not tainted 5.10.123 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28248 pid: 6816 ppid: 285 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:3792 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4541 schedule+0xcb/0x270 kernel/sched/core.c:4619 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4678 __mutex_lock_common kernel/locking/mutex.c:1047 [inline] __mutex_lock+0x7c9/0x1250 kernel/locking/mutex.c:1109 perf_event_ctx_lock_nested+0x243/0x4a0 kernel/events/core.c:1386 perf_event_ctx_lock kernel/events/core.c:1399 [inline] perf_event_release_kernel+0x3a6/0xc20 kernel/events/core.c:5072 perf_release+0x33/0x40 kernel/events/core.c:5170 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 get_signal+0xfaf/0x2200 kernel/signal.c:2552 arch_do_signal+0x8c/0x1c60 arch/x86/kernel/signal.c:805 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xf7/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f89b8e81b19 RSP: 002b:00007f89b63b5188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffef RBX: 00007f89b8f950e0 RCX: 00007f89b8e81b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200003c0 RBP: 00007f89b8edbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe412f978f R14: 00007f89b63b5300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: ffffffff84df7460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6389 1 lock held by in:imklog/190: #0: ffff88800f2ced70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:1003 1 lock held by syz-executor.3/6799: #0: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_exit_task_context kernel/events/core.c:12457 [inline] #0: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_exit_task+0x2aa/0xda0 kernel/events/core.c:12523 3 locks held by syz-executor.3/6800: #0: ffff888016f005d8 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0xfc1/0x2cb0 kernel/events/core.c:11978 #1: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11663 [inline] #1: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] #1: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1237/0x2cb0 kernel/events/core.c:11996 #2: ffff88801d252cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11664 [inline] #2: ffff88801d252cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11723 [inline] #2: ffff88801d252cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1244/0x2cb0 kernel/events/core.c:11996 1 lock held by syz-executor.3/6816: #0: ffff88801d252cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_ctx_lock_nested+0x243/0x4a0 kernel/events/core.c:1386 =============================================