WARNING in ttwu_queue

WARNING in ttwu_queue_wakelist
Status: upstream: reported on 2020/07/22 18:22
Reported-by: syzbot+c9cb7a5af4ab24dc9088@syzkaller.appspotmail.com
First crash: 273d, last: 16d

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 12810 at kernel/sched/core.c:3156 cpu_max_bits_warn include/linux/cpumask.h:137 [inline]
WARNING: CPU: 1 PID: 12810 at kernel/sched/core.c:3156 cpumask_check include/linux/cpumask.h:144 [inline]
WARNING: CPU: 1 PID: 12810 at kernel/sched/core.c:3156 cpumask_test_cpu include/linux/cpumask.h:373 [inline]
WARNING: CPU: 1 PID: 12810 at kernel/sched/core.c:3156 ttwu_queue_cond kernel/sched/core.c:3131 [inline]
WARNING: CPU: 1 PID: 12810 at kernel/sched/core.c:3156 ttwu_queue_wakelist+0x232/0x360 kernel/sched/core.c:3155
Modules linked in:
CPU: 1 PID: 12810 Comm: syz-executor.5 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ttwu_queue_wakelist+0x232/0x360 include/linux/cpumask.h:137
Code: 83 c7 38 44 89 f7 4c 89 fe e8 fa c1 19 00 b0 01 eb 02 31 c0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b e9 ee fd ff ff <0f> 0b 31 c0 eb e4 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 61 fe ff ff
RSP: 0018:ffffc90000dc0cb0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff8880b9d1f774 RCX: ffffffff81541b7c
RDX: dffffc0000000000 RSI: 0000000000010002 RDI: 0000000000000000
RBP: 1ffffffff17032cd R08: dffffc0000000000 R09: fffffbfff1b69841
R10: fffffbfff1b69841 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8b819668 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000002206400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e4a65 CR3: 0000000085147000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ttwu_queue kernel/sched/core.c:3181 [inline]
 try_to_wake_up+0x5c7/0xa90 kernel/sched/core.c:3464
 hrtimer_wakeup+0x5e/0x70 kernel/time/hrtimer.c:1791
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x4c9/0xa00 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
Code: 80 ef 01 00 65 8b 15 c4 d6 88 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 34 15 00 00 00 74 2c 8b 91 10 15 00 00 <83> fa 02 75 21 48 8b 91 18 15 00 00 48 8b 32 48 8d 7e 01 8b 89 14
RSP: 0018:ffffc900022dfb48 EFLAGS: 00000246
RAX: ffffffff8206b895 RBX: ffff888022b38000 RCX: ffff8880260ab880
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff8c710280
RBP: ffff888022b38038 R08: ffffffff820665d6 R09: ffffed100eb9ed69
R10: ffffed100eb9ed69 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888022b36678 R14: dffffc0000000000 R15: 1ffff11004566ccf
 rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:266
 rcu_read_lock include/linux/rcupdate.h:656 [inline]
 ext4_get_group_desc+0x116/0x430 fs/ext4/balloc.c:284
 recently_deleted fs/ext4/ialloc.c:682 [inline]
 find_inode_bit+0x28a/0x660 fs/ext4/ialloc.c:728
 __ext4_new_inode+0xe5b/0x53c0 fs/ext4/ialloc.c:1063
 ext4_symlink+0x421/0xe90 fs/ext4/namei.c:3347
 vfs_symlink+0x3a0/0x540 fs/namei.c:4176
 do_symlinkat+0x1c9/0x440 fs/namei.c:4206
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465d67
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffe7783e3f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000465d67
RDX: 00007ffe7783e4e3 RSI: 00000000004bfaa5 RDI: 00007ffe7783e4d0
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe7783e290
R10: 00007ffe7783e147 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe7783e4d0

Crashes (7):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/04/05 09:57	upstream	e49d033b	6a81331a	.config	log	report	info	WARNING in ttwu_queue_wakelist
ci-upstream-kasan-gce-root	2020/09/25 19:55	upstream	171d4ff7	4a006f63	.config	log	report	info
ci-upstream-kasan-gce-selinux-root	2020/09/19 04:44	upstream	10b82d51	53ce8104	.config	log	report	info
ci-upstream-kasan-gce-smack-root	2020/07/22 08:07	upstream	4fa640dc	128cd85f	.config	log	report
ci-upstream-kasan-gce-386	2020/09/14 08:11	upstream	e4c26faa	2d3cdd63	.config	log	report
ci-upstream-kasan-gce-386	2020/08/25 00:28	upstream	d012a719	67b599d1	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/12/27 21:33	linux-next	d7a03a44	2242f77f	.config	log	report	info