------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] poll_schedule_timeout.constprop.0+0x0/0x190 fs/select.c:785 WARNING: CPU: 1 PID: 3590 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 1 PID: 3590 Comm: sshd Tainted: G W 5.17.0-syzkaller-11407-gae085d7f9365 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__might_sleep+0x105/0x150 kernel/sched/core.c:9656 Code: 70 02 00 48 8d bb f0 16 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 34 48 8b 93 f0 16 00 00 48 c7 c7 e0 c8 cb 89 e8 3e d2 c8 07 <0f> 0b e9 75 ff ff ff e8 7f 90 72 00 e9 26 ff ff ff 89 34 24 e8 82 RSP: 0018:ffffc900003f8d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888073cdc240 RCX: 0000000000000000 RDX: ffff888073cdc240 RSI: ffffffff815efbd8 RDI: fffff5200007f19f RBP: ffffffff8a23ee40 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815ea5ae R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a23f240 R15: 0000000000000000 FS: 00007fd107495800(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa26ff691b8 CR3: 00000000208d5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_release_queue+0x1f/0x320 block/blk-sysfs.c:766 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 blkg_free.part.0+0x112/0x1f0 block/blk-cgroup.c:86 blkg_free block/blk-cgroup.c:78 [inline] __blkg_release+0x105/0x160 block/blk-cgroup.c:102 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:schedule_debug kernel/sched/core.c:5627 [inline] RIP: 0010:__schedule+0x12d/0x4940 kernel/sched/core.c:6273 Code: 80 3c 02 00 0f 85 e4 3c 00 00 48 8b 85 70 ff ff ff 48 8b 58 20 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 <0f> 85 b1 3c 00 00 48 81 3b 9d 6e ac 57 0f 85 db 47 00 00 48 8b 85 RSP: 0018:ffffc9000332f468 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90003328000 RCX: 1ffffffff20ae328 RDX: 1ffff92000665000 RSI: 0000000000000001 RDI: ffff888073cdc260 RBP: ffffc9000332f590 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817e1418 R11: 0000000000000000 R12: ffff888073cdc26c R13: ffffed100e79b848 R14: 0000008b4ef84206 R15: ffff8880b9d3a000 schedule+0xd2/0x1f0 kernel/sched/core.c:6454 schedule_hrtimeout_range_clock+0x195/0x390 kernel/time/hrtimer.c:2305 poll_schedule_timeout.constprop.0+0xb9/0x190 fs/select.c:244 do_select+0x11a1/0x16a0 fs/select.c:607 core_sys_select+0x3c2/0x9c0 fs/select.c:681 do_pselect.constprop.0+0x17b/0x1c0 fs/select.c:763 __do_sys_pselect6 fs/select.c:804 [inline] __se_sys_pselect6 fs/select.c:795 [inline] __x64_sys_pselect6+0x17f/0x230 fs/select.c:795 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd107104d83 Code: 11 44 24 30 4c 89 4c 24 40 48 c7 44 24 48 08 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 21 4c 8d 4c 24 40 b8 0e 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 48 83 c4 58 5b 5d c3 66 0f 1f 44 00 00 4c RSP: 002b:00007ffca9b38730 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: ffffffffffffffda RBX: 00000000000668a0 RCX: 00007fd107104d83 RDX: 000056142a0066d0 RSI: 000056142a005c60 RDI: 000000000000000a RBP: 000056142a0190d0 R08: 00007ffca9b38760 R09: 00007ffca9b38770 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000001 R14: 00007ffca9b387e8 R15: 00007ffca9b38868 ---------------- Code disassembly (best guess): 0: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 4: 0f 85 e4 3c 00 00 jne 0x3cee a: 48 8b 85 70 ff ff ff mov -0x90(%rbp),%rax 11: 48 8b 58 20 mov 0x20(%rax),%rbx 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 da mov %rbx,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 b1 3c 00 00 jne 0x3ce1 <-- trapping instruction 30: 48 81 3b 9d 6e ac 57 cmpq $0x57ac6e9d,(%rbx) 37: 0f 85 db 47 00 00 jne 0x4818 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 85 .byte 0x85