UBSAN: shift-out-of-bounds in detach

UBSAN: shift-out-of-bounds in detach_tasks
Status: upstream: reported on 2021/02/23 13:35
Reported-by: syzbot+f9131489729201445f66@syzkaller.appspotmail.com
First crash: 6d08h, last: 17h17m

Sample crash report:

================================================================================
UBSAN: shift-out-of-bounds in kernel/sched/fair.c:7712:14
shift exponent 70 is too large for 64-bit type 'unsigned long'
CPU: 1 PID: 10038 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x125/0x19e lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:148 [inline]
 __ubsan_handle_shift_out_of_bounds+0x432/0x4d0 lib/ubsan.c:327
 detach_tasks+0xd04/0x1110 kernel/sched/fair.c:7712
 load_balance+0x3a06/0x5aa0 kernel/sched/fair.c:9641
 rebalance_domains+0x4ca/0x9c0 kernel/sched/fair.c:10029
 __do_softirq+0x318/0x714 kernel/softirq.c:345
 invoke_softirq kernel/softirq.c:221 [inline]
 __irq_exit_rcu+0x1d8/0x200 kernel/softirq.c:422
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:434
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:page_outside_zone_boundaries mm/page_alloc.c:564 [inline]
RIP: 0010:bad_range+0x92/0x380 mm/page_alloc.c:597
Code: 0c 24 48 8d 4c 24 50 48 c1 e9 03 48 89 4c 24 38 4c 89 eb 48 c1 eb 03 48 89 44 24 48 48 c1 e8 03 48 89 44 24 30 48 89 54 24 40 <48> c1 ea 03 48 89 54 24 28 0f 1f 44 00 00 9c 8f 44 24 50 48 8b 44
RSP: 0018:ffffc90017627858 EFLAGS: 00000a02
RAX: 1ffff11047fff1ce RBX: 1ffff11047fff1d5 RCX: 1ffff92002ec4f15
RDX: ffff88823fff8e80 RSI: ffffea00054d3400 RDI: ffff88823fff8e00
RBP: ffff88813fffbe00 R08: dffffc0000000000 R09: ffffed1047fff278
R10: ffffed1047fff278 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88823fff8ea8 R14: 0000000000000000 R15: dffffc0000000000
 rmqueue+0x1d1d/0x1eb0 mm/page_alloc.c:3524
 get_page_from_freelist+0x654/0xc50 mm/page_alloc.c:3943
 __alloc_pages_nodemask+0x1cf/0x500 mm/page_alloc.c:4996
 alloc_pages include/linux/gfp.h:561 [inline]
 __vmalloc_area_node mm/vmalloc.c:2510 [inline]
 __vmalloc_node_range+0x3af/0x890 mm/vmalloc.c:2576
 __bpf_map_area_alloc+0x11e/0x130 kernel/bpf/syscall.c:306
 queue_stack_map_alloc+0xba/0x1d0 kernel/bpf/queue_stack_maps.c:76
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create kernel/bpf/syscall.c:828 [inline]
 __do_sys_bpf+0x59b6/0x11120 kernel/bpf/syscall.c:4370
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
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:00007f7007224188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000000040 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffefd174def R14: 00007f7007224300 R15: 0000000000022000
================================================================================

Crashes (3):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/02/28 04:29	upstream	5695e516	4c37c133	.config	log	report	info	UBSAN: shift-out-of-bounds in detach_tasks
ci-upstream-kasan-gce-smack-root	2021/02/22 15:33	upstream	31caf8b2	a659b3f1	.config	log	report	info	UBSAN: shift-out-of-bounds in detach_tasks
ci-upstream-kasan-gce-smack-root	2021/02/22 12:52	upstream	31caf8b2	a659b3f1	.config	log	report	info	UBSAN: shift-out-of-bounds in detach_tasks