INFO: task syz-executor.3:8761 blocked for more than 143 seconds. Not tainted 5.10.79 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27952 pid: 8761 ppid: 289 flags:0x10000004 Call Trace: context_switch kernel/sched/core.c:3787 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4536 schedule+0xcb/0x270 kernel/sched/core.c:4614 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4673 __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:1356 perf_event_ctx_lock kernel/events/core.c:1369 [inline] perf_event_release_kernel+0x3a6/0xc20 kernel/events/core.c:5032 perf_release+0x33/0x40 kernel/events/core.c:5130 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 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: 0033:0x7f90986d372b RSP: 002b:00007ffdd0c66220 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f90986d372b RDX: 00007f909883b668 RSI: 0000000000000080 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffdd0c66310 R11: 0000000000000293 R12: 000000000014fc82 R13: 00000000000003e8 R14: 00007f9098833f60 R15: 000000000014fa37 INFO: task syz-executor.3:8770 blocked for more than 143 seconds. Not tainted 5.10.79 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27352 pid: 8770 ppid: 289 flags:0x10004004 Call Trace: context_switch kernel/sched/core.c:3787 [inline] __schedule+0x848/0x1e80 kernel/sched/core.c:4536 schedule+0xcb/0x270 kernel/sched/core.c:4614 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4673 __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:11619 [inline] __perf_event_ctx_lock_double kernel/events/core.c:11678 [inline] __do_sys_perf_event_open+0x1244/0x2d00 kernel/events/core.c:11948 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f9098720b19 RSP: 002b:00007f9095c96188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f9098833f60 RCX: 00007f9098720b19 RDX: 0000000000000000 RSI: 0000000000000182 RDI: 0000000020001d80 RBP: 00007f909877af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd0c661bf R14: 00007f9095c96300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/22: #0: ffffffff84df6760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6379 1 lock held by in:imklog/203: 2 locks held by agetty/219: #0: ffff88801681f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc900007d12e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xdca/0x1320 drivers/tty/n_tty.c:2174 5 locks held by syz-fuzzer/260: #0: ffff88806ce33218 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1296 [inline] #0: ffff88806ce33218 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x1e2/0x1e80 kernel/sched/core.c:4454 #1: ffffffff84df6760 (rcu_read_lock){....}-{1:2}, at: trace_sched_stat_runtime include/trace/events/sched.h:435 [inline] #1: ffffffff84df6760 (rcu_read_lock){....}-{1:2}, at: update_curr+0x27d/0x7b0 kernel/sched/fair.c:879 #2: ffff88806ce34328 (&list->lock#2){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] #2: ffff88806ce34328 (&list->lock#2){..-.}-{2:2}, at: rps_lock net/core/dev.c:224 [inline] #2: ffff88806ce34328 (&list->lock#2){..-.}-{2:2}, at: process_backlog+0x502/0x7e0 net/core/dev.c:6379 #3: ffffffff84df6760 (rcu_read_lock){....}-{1:2}, at: __skb_pull include/linux/skbuff.h:2298 [inline] #3: ffffffff84df6760 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish+0x124/0x380 net/ipv4/ip_input.c:228 #4: ffff8880169f8ca0 (slock-AF_INET/1){+.-.}-{2:2}, at: tcp_v4_rcv+0x2e9c/0x3820 net/ipv4/tcp_ipv4.c:2061 1 lock held by syz-executor.3/8761: #0: ffff8880476d20b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_ctx_lock_nested+0x243/0x4a0 kernel/events/core.c:1356 3 locks held by syz-executor.3/8770: #0: ffff88800d422cd8 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0xfc1/0x2d00 kernel/events/core.c:11930 #1: ffff8880476d20b0 (&ctx->mutex){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11618 [inline] #1: ffff8880476d20b0 (&ctx->mutex){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11678 [inline] #1: ffff8880476d20b0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1237/0x2d00 kernel/events/core.c:11948 #2: ffff8880476d20b0 (&ctx->mutex/1){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11619 [inline] #2: ffff8880476d20b0 (&ctx->mutex/1){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11678 [inline] #2: ffff8880476d20b0 (&ctx->mutex/1){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1244/0x2d00 kernel/events/core.c:11948 =============================================