============================= [ BUG: Invalid wait context ] 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0 Not tainted ----------------------------- syz.2.1639/12425 is trying to lock: ffff8880b873e8d8 (&dev->master_mutex){+.+.}-{4:4}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 other info that might help us debug this: context-{5:5} 3 locks held by syz.2.1639/12425: #0: ffff888035083798 (&sighand->siglock){-.-.}-{3:3}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #0: ffff888035083798 (&sighand->siglock){-.-.}-{3:3}, at: do_group_exit+0xed/0x2c0 kernel/exit.c:1073 #1: ffff8880792c8a18 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline] #1: ffff8880792c8a18 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xc2/0x1470 kernel/sched/core.c:4205 #2: ffff8880b863e8d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 stack backtrace: CPU: 0 UID: 0 PID: 12425 Comm: syz.2.1639 Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 _double_lock_balance kernel/sched/sched.h:2989 [inline] double_lock_balance kernel/sched/sched.h:3034 [inline] find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1914 push_rt_task+0x144/0x790 kernel/sched/rt.c:2048 push_rt_tasks kernel/sched/rt.c:2096 [inline] task_woken_rt+0x14c/0x220 kernel/sched/rt.c:2394 ttwu_do_activate+0x30c/0x760 kernel/sched/core.c:3732 ttwu_queue kernel/sched/core.c:3993 [inline] try_to_wake_up+0x89b/0x1470 kernel/sched/core.c:4321 signal_wake_up_state+0xb4/0x120 kernel/signal.c:733 signal_wake_up include/linux/sched/signal.h:445 [inline] zap_other_threads+0x2fd/0x3e0 kernel/signal.c:1351 do_group_exit+0x18a/0x2c0 kernel/exit.c:1082 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5ab4585d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffab6c3948 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5ab4585d29 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fffab6c399c R08: 00007fffab6c3a2f R09: 00000000000bfc43 R10: 0000000000002910 R11: 0000000000000246 R12: 0000000000000032 R13: 00000000000bfc43 R14: 00007fffab6c39f0 R15: 00007fffab6c39f0