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Message-ID: <1bc10e71-54d2-4a13-934b-ee613b5a0f99@redhat.com>
Date: Sun, 23 Jun 2024 12:54:17 -0400
From: Waiman Long <longman@...hat.com>
To: syzbot <syzbot+05801a3641d9817ee5ec@...kaller.appspotmail.com>,
cgroups@...r.kernel.org, hannes@...xchg.org, linux-kernel@...r.kernel.org,
lizefan.x@...edance.com, syzkaller-bugs@...glegroups.com, tj@...nel.org,
Vitalii Bursov <vitaly@...sov.com>, Ingo Molnar <mingo@...nel.org>
Subject: Re: [syzbot] [cgroups?] KASAN: invalid-free in build_sched_domains
cc other relevant people.
On 6/23/24 12:50, Waiman Long wrote:
> On 6/23/24 00:25, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit: 2ccbdf43d5e7 Merge tag 'for-linus' of
>> git://git.kernel.org..
>> git tree: upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=13b21bca980000
>> kernel config:
>> https://syzkaller.appspot.com/x/.config?x=81c0d76ceef02b39
>> dashboard link:
>> https://syzkaller.appspot.com/bug?extid=05801a3641d9817ee5ec
>> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils
>> for Debian) 2.40
>> userspace arch: i386
>>
>> Unfortunately, I don't have any reproducer for this issue yet.
>
> It is hard to debug this problem without a reproducer. Anyway, I
> suspect the likely cause of this bug is commit a1fd0b9d751f
> ("sched/fair: Allow disabling sched_balance_newidle with
> sched_relax_domain_level").
>
> Regards,
> Longman
>
>
>>
>> Downloadable assets:
>> disk image (non-bootable):
>> https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2ccbdf43.raw.xz
>> vmlinux:
>> https://storage.googleapis.com/syzbot-assets/13cdb5bfbafa/vmlinux-2ccbdf43.xz
>> kernel image:
>> https://storage.googleapis.com/syzbot-assets/7a14f5d07f81/bzImage-2ccbdf43.xz
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the
>> commit:
>> Reported-by: syzbot+05801a3641d9817ee5ec@...kaller.appspotmail.com
>>
>> loop1: detected capacity change from 0 to 1024
>> hfsplus: unable to find HFS+ superblock
>> ==================================================================
>> BUG: KASAN: invalid-free in __sdt_free kernel/sched/topology.c:2302
>> [inline]
>> BUG: KASAN: invalid-free in __free_domain_allocs
>> kernel/sched/topology.c:1498 [inline]
>> BUG: KASAN: invalid-free in build_sched_domains+0x14df/0x52e0
>> kernel/sched/topology.c:2535
>> Free of addr ffff88802b4a3f89 by task syz-executor.1/13033
>>
>> CPU: 3 PID: 13033 Comm: syz-executor.1 Not tainted
>> 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
>> 1.16.2-debian-1.16.2-1 04/01/2014
>> Call Trace:
>> <TASK>
>> __dump_stack lib/dump_stack.c:88 [inline]
>> dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
>> print_address_description mm/kasan/report.c:377 [inline]
>> print_report+0xc3/0x620 mm/kasan/report.c:488
>> kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:563
>> poison_slab_object+0x15e/0x160 mm/kasan/common.c:223
>> __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
>> kasan_slab_free include/linux/kasan.h:184 [inline]
>> slab_free_hook mm/slub.c:2196 [inline]
>> slab_free mm/slub.c:4437 [inline]
>> kfree+0x12a/0x3b0 mm/slub.c:4558
>> __sdt_free kernel/sched/topology.c:2302 [inline]
>> __free_domain_allocs kernel/sched/topology.c:1498 [inline]
>> build_sched_domains+0x14df/0x52e0 kernel/sched/topology.c:2535
>> partition_sched_domains_locked+0x519/0x9e0
>> kernel/sched/topology.c:2747
>> partition_and_rebuild_sched_domains kernel/cgroup/cpuset.c:1181
>> [inline]
>> rebuild_sched_domains_locked+0xebb/0x2100 kernel/cgroup/cpuset.c:1246
>> update_relax_domain_level kernel/cgroup/cpuset.c:2952 [inline]
>> cpuset_write_s64+0x2ca/0x340 kernel/cgroup/cpuset.c:3560
>> cgroup_file_write+0x5ad/0x7d0 kernel/cgroup/cgroup.c:4113
>> kernfs_fop_write_iter+0x343/0x500 fs/kernfs/file.c:334
>> new_sync_write fs/read_write.c:497 [inline]
>> vfs_write+0x6b6/0x1140 fs/read_write.c:590
>> ksys_write+0x12f/0x260 fs/read_write.c:643
>> do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
>> __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
>> do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
>> entry_SYSENTER_compat_after_hwframe+0x84/0x8e
>> RIP: 0023:0xf7293579
>> Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00
>> 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d>
>> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
>> RSP: 002b:00000000f5e855ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004
>> RAX: ffffffffffffffda RBX: 000000000000000e RCX: 0000000020000040
>> RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
>> RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
>> R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
>> R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
>> </TASK>
>>
>> Allocated by task 13033:
>> kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
>> kasan_save_track+0x14/0x30 mm/kasan/common.c:68
>> poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
>> __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
>> kmalloc_node_noprof include/linux/slab.h:677 [inline]
>> __sdt_alloc kernel/sched/topology.c:2251 [inline]
>> __visit_domain_allocation_hell kernel/sched/topology.c:1510 [inline]
>> build_sched_domains+0x37c/0x52e0 kernel/sched/topology.c:2401
>> partition_sched_domains_locked+0x519/0x9e0
>> kernel/sched/topology.c:2747
>> partition_and_rebuild_sched_domains kernel/cgroup/cpuset.c:1181
>> [inline]
>> rebuild_sched_domains_locked+0xebb/0x2100 kernel/cgroup/cpuset.c:1246
>> update_relax_domain_level kernel/cgroup/cpuset.c:2952 [inline]
>> cpuset_write_s64+0x2ca/0x340 kernel/cgroup/cpuset.c:3560
>> cgroup_file_write+0x5ad/0x7d0 kernel/cgroup/cgroup.c:4113
>> kernfs_fop_write_iter+0x343/0x500 fs/kernfs/file.c:334
>> new_sync_write fs/read_write.c:497 [inline]
>> vfs_write+0x6b6/0x1140 fs/read_write.c:590
>> ksys_write+0x12f/0x260 fs/read_write.c:643
>> do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
>> __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
>> do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
>> entry_SYSENTER_compat_after_hwframe+0x84/0x8e
>>
>> The buggy address belongs to the object at ffff88802b4a3f80
>> which belongs to the cache kmalloc-16 of size 16
>> The buggy address is located 9 bytes inside of
>> 16-byte region [ffff88802b4a3f80, ffff88802b4a3f90)
>>
>> The buggy address belongs to the physical page:
>> page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
>> pfn:0x2b4a3
>> anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
>> page_type: 0xffffefff(slab)
>> raw: 00fff00000000000 ffff888015442640 0000000000000000 dead000000000001
>> raw: 0000000000000000 0000000080800080 00000001ffffefff 0000000000000000
>> page dumped because: kasan: bad access detected
>> page_owner tracks the page as allocated
>> page last allocated via order 0, migratetype Unmovable, gfp_mask
>> 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid
>> 5530, tgid 5530 (syz-executor.3), ts 162857508656, free_ts 162402453637
>> set_page_owner include/linux/page_owner.h:32 [inline]
>> post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
>> prep_new_page mm/page_alloc.c:1476 [inline]
>> get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420
>> __alloc_pages_slowpath mm/page_alloc.c:4211 [inline]
>> __alloc_pages_noprof+0x6ad/0x2460 mm/page_alloc.c:4691
>> __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
>> alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
>> alloc_slab_page+0x56/0x110 mm/slub.c:2265
>> allocate_slab mm/slub.c:2428 [inline]
>> new_slab+0x84/0x260 mm/slub.c:2481
>> ___slab_alloc+0xdac/0x1870 mm/slub.c:3667
>> __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
>> __slab_alloc_node mm/slub.c:3810 [inline]
>> slab_alloc_node mm/slub.c:3989 [inline]
>> __do_kmalloc_node mm/slub.c:4121 [inline]
>> __kmalloc_node_noprof+0x36c/0x450 mm/slub.c:4129
>> kmalloc_node_noprof include/linux/slab.h:681 [inline]
>> kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:634
>> xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
>> xt_replace_table+0x1c7/0x910 net/netfilter/x_tables.c:1394
>> __do_replace+0x1d9/0x9c0 net/ipv4/netfilter/arp_tables.c:912
>> compat_do_replace+0x3ca/0x500 net/ipv4/netfilter/ip_tables.c:1529
>> do_ip6t_set_ctl+0x686/0xc20 net/ipv6/netfilter/ip6_tables.c:1641
>> nf_setsockopt+0x8a/0xf0 net/netfilter/nf_sockopt.c:101
>> ipv6_setsockopt+0x133/0x1a0 net/ipv6/ipv6_sockglue.c:999
>> tcp_setsockopt+0xa4/0x100 net/ipv4/tcp.c:3765
>> page last free pid 7520 tgid 7520 stack trace:
>> reset_page_owner include/linux/page_owner.h:25 [inline]
>> free_pages_prepare mm/page_alloc.c:1088 [inline]
>> free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583
>> qlink_free mm/kasan/quarantine.c:163 [inline]
>> qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
>> kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
>> __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
>> kasan_slab_alloc include/linux/kasan.h:201 [inline]
>> slab_post_alloc_hook mm/slub.c:3941 [inline]
>> slab_alloc_node mm/slub.c:4001 [inline]
>> kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4008
>> ptlock_alloc+0x1f/0x70 mm/memory.c:6444
>> ptlock_init include/linux/mm.h:2968 [inline]
>> pagetable_pte_ctor include/linux/mm.h:2991 [inline]
>> __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
>> pte_alloc_one+0x74/0x370 arch/x86/mm/pgtable.c:33
>> __pte_alloc+0x6e/0x3a0 mm/memory.c:442
>> copy_pte_range mm/memory.c:1094 [inline]
>> copy_pmd_range mm/memory.c:1240 [inline]
>> copy_pud_range mm/memory.c:1277 [inline]
>> copy_p4d_range mm/memory.c:1301 [inline]
>> copy_page_range+0x2fea/0x5c10 mm/memory.c:1399
>> dup_mmap kernel/fork.c:751 [inline]
>> dup_mm kernel/fork.c:1688 [inline]
>> copy_mm+0x1416/0x2680 kernel/fork.c:1737
>> copy_process+0x3ea8/0x6f50 kernel/fork.c:2390
>> kernel_clone+0xfd/0x980 kernel/fork.c:2797
>> __do_compat_sys_ia32_clone+0xb7/0x100 arch/x86/kernel/sys_ia32.c:254
>> do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
>> __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
>> do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
>> entry_SYSENTER_compat_after_hwframe+0x84/0x8e
>>
>> Memory state around the buggy address:
>> ffff88802b4a3e80: 00 06 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
>> ffff88802b4a3f00: 00 00 fc fc fa fb fc fc 00 07 fc fc 00 00 fc fc
>>> ffff88802b4a3f80: 00 00 fc fc 00 00 fc fc fa fb fc fc 00 00 fc fc
>> ^
>> ffff88802b4a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>> ffff88802b4a4080: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00
>> ==================================================================
>> ----------------
>> Code disassembly (best guess), 2 bytes skipped:
>> 0: 10 06 adc %al,(%rsi)
>> 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
>> 6: 10 07 adc %al,(%rdi)
>> 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
>> c: 10 08 adc %cl,(%rax)
>> e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
>> 1e: 00 51 52 add %dl,0x52(%rcx)
>> 21: 55 push %rbp
>> 22: 89 e5 mov %esp,%ebp
>> 24: 0f 34 sysenter
>> 26: cd 80 int $0x80
>> * 28: 5d pop %rbp <-- trapping instruction
>> 29: 5a pop %rdx
>> 2a: 59 pop %rcx
>> 2b: c3 ret
>> 2c: 90 nop
>> 2d: 90 nop
>> 2e: 90 nop
>> 2f: 90 nop
>> 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
>> 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
>>
>>
>> ---
>> This report is generated by a bot. It may contain errors.
>> See https://goo.gl/tpsmEJ for more information about syzbot.
>> syzbot engineers can be reached at syzkaller@...glegroups.com.
>>
>> syzbot will keep track of this issue. See:
>> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>>
>> If the report is already addressed, let syzbot know by replying with:
>> #syz fix: exact-commit-title
>>
>> If you want to overwrite report's subsystems, reply with:
>> #syz set subsystems: new-subsystem
>> (See the list of subsystem names on the web dashboard)
>>
>> If the report is a duplicate of another one, reply with:
>> #syz dup: exact-subject-of-another-report
>>
>> If you want to undo deduplication, reply with:
>> #syz undup
>>
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