list_del corruption. prev->next should be ffff88800010d928, but was 0000000000000000 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:51! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 24357 Comm: syz-executor.2 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid.cold+0xf/0x4a lib/list_debug.c:51 Code: e8 93 73 f2 ff 0f 0b 48 89 f1 48 c7 c7 a0 b4 e3 89 4c 89 e6 e8 7f 73 f2 ff 0f 0b 48 89 ee 48 c7 c7 40 b6 e3 89 e8 6e 73 f2 ff <0f> 0b 4c 89 ea 48 89 ee 48 c7 c7 80 b5 e3 89 e8 5a 73 f2 ff 0f 0b RSP: 0018:ffffc900027cf8c0 EFLAGS: 00010086 RAX: 0000000000000054 RBX: ffff88800010d920 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815d68c5 RDI: fffff520004f9f0a RBP: ffff88800010d928 R08: 0000000000000054 R09: 0000000000000000 R10: ffffffff815d06fe R11: 0000000000000000 R12: ffff88800010d928 R13: 0000000000000000 R14: ffff88800010d938 R15: ffff88800010d930 FS: 00007fc72464a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000203ff030 CR3: 0000000016fed000 CR4: 0000000000350ef0 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] plist_del+0xbc/0x480 lib/plist.c:127 dequeue_pushable_task kernel/sched/rt.c:389 [inline] dequeue_task_rt+0xb2/0x230 kernel/sched/rt.c:1392 dequeue_task kernel/sched/core.c:1967 [inline] deactivate_task kernel/sched/core.c:1981 [inline] __schedule+0xc91/0x26f0 kernel/sched/core.c:5894 schedule+0xd3/0x270 kernel/sched/core.c:6019 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue_me+0x25a/0x520 kernel/futex.c:2602 futex_wait+0x1db/0x5f0 kernel/futex.c:2704 do_futex+0x250/0x1770 kernel/futex.c:3730 __do_sys_futex+0xdc/0x3b0 kernel/futex.c:3807 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc72464a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000056c040 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056c040 RBP: 000000000056c038 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c044 R13: 00007ffd90d35e0f R14: 00007fc72464a300 R15: 0000000000022000 Modules linked in: ======================================================