------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=2001 set at [] futex_wait_setup+0x3c4/0x590 kernel/futex/waitwake.c:694 WARNING: kernel/sched/core.c:9161 at __might_sleep+0x92/0xf0 kernel/sched/core.c:9157, CPU#0: syz.1.2926/17134 Modules linked in: CPU: 0 UID: 0 PID: 17134 Comm: syz.1.2926 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__might_sleep+0xac/0xf0 kernel/sched/core.c:9157 Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 7e 85 e6 0e 43 80 3c 3c 00 74 08 48 89 df e8 af 00 a1 00 48 8b 0b 4c 89 f7 89 ee 48 89 ca <67> 48 0f b9 3a 44 89 ee 48 8b 3c 24 eb b5 44 89 f1 80 e1 07 80 c1 RSP: 0018:ffffc90000007c08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888029695728 RCX: ffffffff81bb1874 RDX: ffffffff81bb1874 RSI: 0000000000002001 RDI: ffffffff907d0050 RBP: 0000000000002001 R08: 0000000000000100 R09: 1ffffffff20f404f R10: dffffc0000000000 R11: fffffbfff20f4050 R12: 1ffff110052d2ae5 R13: 00000000000011c8 R14: ffffffff907d0050 R15: dffffc0000000000 FS: 000055555ba80500(0000) GS:ffff888124ce0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3e3fb1 CR3: 0000000077d74000 CR4: 00000000003526f0 Call Trace: __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4552 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:767 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:753 Code: 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 48 ff 05 cf b4 e7 11 6a c6 36 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df RSP: 0018:ffffc90004da7950 EFLAGS: 00000283 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff8ec10ee0 RBP: 1ffff110052d27d3 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff20f4050 R12: ffffffff8ec10ee0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x58/0x350 kernel/locking/lockdep.c:5871 sched_submit_work kernel/sched/core.c:7305 [inline] schedule+0xb0/0x2b0 kernel/sched/core.c:7361 futex_do_wait kernel/futex/waitwake.c:387 [inline] __futex_wait+0x1d3/0x400 kernel/futex/waitwake.c:722 futex_wait+0x121/0x390 kernel/futex/waitwake.c:750 do_futex+0x3e7/0x4e0 kernel/futex/syscalls.c:133 __do_sys_futex kernel/futex/syscalls.c:210 [inline] __se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:191 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff8f9f9e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff8fa34fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00000000000cd351 RCX: 00007ff8f9f9e159 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff8fa225fac RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000 R10: 00007ff8fa34fcb0 R11: 0000000000000246 R12: 00007ff8fa34fcd0 R13: 00007ff8fa225fac R14: 00000000000cd383 R15: 00007ff8fa34fcb0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 3c 24 mov %rdi,(%rsp) 6: 41 89 f5 mov %esi,%r13d 9: 4c 8d 35 7e 85 e6 0e lea 0xee6857e(%rip),%r14 # 0xee6858e 10: 43 80 3c 3c 00 cmpb $0x0,(%r12,%r15,1) 15: 74 08 je 0x1f 17: 48 89 df mov %rbx,%rdi 1a: e8 af 00 a1 00 call 0xa100ce 1f: 48 8b 0b mov (%rbx),%rcx 22: 4c 89 f7 mov %r14,%rdi 25: 89 ee mov %ebp,%esi 27: 48 89 ca mov %rcx,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 44 89 ee mov %r13d,%esi 32: 48 8b 3c 24 mov (%rsp),%rdi 36: eb b5 jmp 0xffffffed 38: 44 89 f1 mov %r14d,%ecx 3b: 80 e1 07 and $0x7,%cl 3e: 80 .byte 0x80 3f: c1 .byte 0xc1