syzbot


KASAN: invalid-free in build_sched_domains

Status: upstream: reported on 2024/06/23 04:25
Subsystems: cgroups
[Documentation on labels]
Reported-by: syzbot+05801a3641d9817ee5ec@syzkaller.appspotmail.com
First crash: 24d, last: 24d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [cgroups?] KASAN: invalid-free in build_sched_domains 2 (3) 2024/06/23 16:54

Sample crash report:
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

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/19 04:13 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: invalid-free in build_sched_domains
* Struck through repros no longer work on HEAD.