R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007ffeb201c0e0 R14: 00007ffeb201c120 R15: 0000000000000000
==================================================================
BUG: KASAN: use-after-free in prog_list_prog kernel/bpf/cgroup.c:174 [inline]
BUG: KASAN: use-after-free in prog_list_length kernel/bpf/cgroup.c:187 [inline]
BUG: KASAN: use-after-free in compute_effective_progs+0x1d3/0x6e0 kernel/bpf/cgroup.c:240
Read of size 8 at addr ffff88810afdc898 by task syz-executor148/407

CPU: 1 PID: 407 Comm: syz-executor148 Not tainted 5.10.101-syzkaller-00148-gceb6918d1d4a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x8d/0x3d0 mm/kasan/report.c:233
 __kasan_report+0x142/0x220 mm/kasan/report.c:419
 kasan_report+0x51/0x70 mm/kasan/report.c:436
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 prog_list_prog kernel/bpf/cgroup.c:174 [inline]
 prog_list_length kernel/bpf/cgroup.c:187 [inline]
 compute_effective_progs+0x1d3/0x6e0 kernel/bpf/cgroup.c:240
 update_effective_progs+0x79/0x310 kernel/bpf/cgroup.c:343
 __cgroup_bpf_detach+0x312/0x570 kernel/bpf/cgroup.c:689
 bpf_cgroup_link_release+0x94/0x230 kernel/bpf/cgroup.c:833
 bpf_link_free kernel/bpf/syscall.c:2347 [inline]
 bpf_link_put+0x1e9/0x270 kernel/bpf/syscall.c:2373
 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2381
 __fput+0x348/0x7d0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x147/0x1b0 kernel/task_work.c:154
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:164 [inline]
 exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266
 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fc740faf243
Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffeb201c098 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 00007fc740faf243
RDX: 00000000000000c0 RSI: 0000000000000005 RDI: 0000000000000008
RBP: 00007ffeb201c0c0 R08: 0000000000000001 R09: 00007ffeb201c0d0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009
R13: 00007ffeb201c0e0 R14: 00007ffeb201c120 R15: 0000000000000000

Allocated by task 407:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:428 [inline]
 ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:507
 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:516
 kasan_kmalloc include/linux/kasan.h:269 [inline]
 kmem_cache_alloc_trace+0x210/0x3a0 mm/slub.c:2983
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 cgroup_bpf_link_attach+0x12e/0x4a0 kernel/bpf/cgroup.c:917
 link_create kernel/bpf/syscall.c:4089 [inline]
 __do_sys_bpf+0xab8e/0x116b0 kernel/bpf/syscall.c:4494
 __se_sys_bpf kernel/bpf/syscall.c:4380 [inline]
 __x64_sys_bpf+0x7a/0x90 kernel/bpf/syscall.c:4380
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 407:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:357
 ____kasan_slab_free+0x133/0x170 mm/kasan/common.c:360
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1604 [inline]
 slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1630
 slab_free mm/slub.c:3212 [inline]
 kfree+0xd5/0x320 mm/slub.c:4200
 bpf_cgroup_link_dealloc+0x15/0x20 kernel/bpf/cgroup.c:848
 bpf_link_free kernel/bpf/syscall.c:2351 [inline]
 bpf_link_put+0x243/0x270 kernel/bpf/syscall.c:2373
 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2381
 __fput+0x348/0x7d0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x147/0x1b0 kernel/task_work.c:154
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:164 [inline]
 exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266
 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff88810afdc880
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 24 bytes inside of
 96-byte region [ffff88810afdc880, ffff88810afdc8e0)
The buggy address belongs to the page:
page:ffffea00042bf700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10afdc
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea00042beac0 0000001300000013 ffff888100043680
raw: 0000000000000000 0000000080200020 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 2335416101, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2385 [inline]
 prep_new_page mm/page_alloc.c:2391 [inline]
 get_page_from_freelist+0xa74/0xa90 mm/page_alloc.c:4067
 __alloc_pages_nodemask+0x3c8/0x820 mm/page_alloc.c:5117
 alloc_slab_page mm/slub.c:1815 [inline]
 allocate_slab+0x6b/0x350 mm/slub.c:1817
 new_slab mm/slub.c:1878 [inline]
 new_slab_objects mm/slub.c:2637 [inline]
 ___slab_alloc+0x143/0x2f0 mm/slub.c:2800
 __slab_alloc mm/slub.c:2840 [inline]
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 __kmalloc+0x2af/0x3d0 mm/slub.c:4038
 kmalloc_array include/linux/slab.h:592 [inline]
 kcalloc include/linux/slab.h:603 [inline]
 cache_random_seq_create+0x81/0x1f0 mm/slab_common.c:909
 init_cache_random_seq mm/slub.c:1695 [inline]
 kmem_cache_open+0x44a/0x590 mm/slub.c:3898
 __kmem_cache_create+0xf/0xd0 mm/slub.c:4512
 create_cache mm/slab_common.c:258 [inline]
 kmem_cache_create_usercopy+0x174/0x2a0 mm/slab_common.c:363
 proto_register+0xed/0x880 net/core/sock.c:3485
 inet6_init+0xc7/0x61c net/ipv6/af_inet6.c:1060
 do_one_initcall+0x1d3/0x5f0 init/main.c:1209
 do_initcall_level+0x182/0x2dd init/main.c:1282
 do_initcalls+0x50/0x94 init/main.c:1298
 do_basic_setup+0x7a/0x81 init/main.c:1318
 kernel_init_freeable+0x2ba/0x3f4 init/main.c:1520
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88810afdc780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff88810afdc800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88810afdc880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                            ^
 ffff88810afdc900: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88810afdc980: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
==================================================================