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BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]
BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline]
BUG: KASAN: slab-out-of-bounds in l2cap_sock_setsockopt+0x2182/0x2930 net/bluetooth/l2cap_sock.c:1027
Read of size 4 at addr ffff88802b000ba3 by task syz-executor.3/8820

CPU: 1 PID: 8820 Comm: syz-executor.3 Not tainted 6.9.0-rc3-next-20240408-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]
 copy_from_sockptr include/linux/sockptr.h:55 [inline]
 l2cap_sock_setsockopt+0x2182/0x2930 net/bluetooth/l2cap_sock.c:1027
 do_sock_setsockopt+0x3af/0x720 net/socket.c:2311
 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f262ce7de69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f262dc7d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f262cfabf80 RCX: 00007f262ce7de69
RDX: 000000000000000a RSI: 0000000000000112 RDI: 0000000000000007
RBP: 00007f262ceca47a R08: 0000000000000002 R09: 0000000000000000
R10: 0000000020003000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f262cfabf80 R15: 00007ffeec808668
 </TASK>

Allocated by task 8820:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4078 [inline]
 __kmalloc_noprof+0x200/0x400 mm/slub.c:4091
 kmalloc_noprof include/linux/slab.h:664 [inline]
 __cgroup_bpf_run_filter_setsockopt+0xd47/0x1050 kernel/bpf/cgroup.c:1869
 do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293
 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

The buggy address belongs to the object at ffff88802b000ba0
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes to the right of
 allocated 2-byte region [ffff88802b000ba0, ffff88802b000ba2)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b000
flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffefff(slab)
raw: 00fff80000000000 ffff888015041280 ffffea0001c05d80 dead000000000002
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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 5100, tgid -1828051538 (syz-executor.4), ts 5100, free_ts 127020875240
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696
 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:271 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2259
 allocate_slab+0x5a/0x2e0 mm/slub.c:2422
 new_slab mm/slub.c:2475 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624
 __slab_alloc+0x58/0xa0 mm/slub.c:3714
 __slab_alloc_node mm/slub.c:3767 [inline]
 slab_alloc_node mm/slub.c:3945 [inline]
 __do_kmalloc_node mm/slub.c:4077 [inline]
 __kmalloc_node_noprof+0x28b/0x440 mm/slub.c:4085
 kmalloc_node_noprof include/linux/slab.h:681 [inline]
 __vmalloc_area_node mm/vmalloc.c:3621 [inline]
 __vmalloc_node_range_noprof+0x5f9/0x1490 mm/vmalloc.c:3816
 __vmalloc_node_noprof mm/vmalloc.c:3881 [inline]
 vzalloc_noprof+0x79/0x90 mm/vmalloc.c:3954
 alloc_counters+0xd7/0x760 net/ipv4/netfilter/ip_tables.c:799
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
 do_ipt_get_ctl+0xecc/0x1810 net/ipv4/netfilter/ip_tables.c:1664
 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777
 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4375
 do_sock_getsockopt+0x373/0x850 net/socket.c:2373
page last free pid 5100 tgid 5100 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1088 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2601
 vfree+0x186/0x2e0 mm/vmalloc.c:3338
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:866 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
 do_ipt_get_ctl+0x11df/0x1810 net/ipv4/netfilter/ip_tables.c:1664
 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777
 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4375
 do_sock_getsockopt+0x373/0x850 net/socket.c:2373
 __sys_getsockopt+0x271/0x330 net/socket.c:2402
 __do_sys_getsockopt net/socket.c:2412 [inline]
 __se_sys_getsockopt net/socket.c:2409 [inline]
 __x64_sys_getsockopt+0xb5/0xd0 net/socket.c:2409
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Memory state around the buggy address:
 ffff88802b000a80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff88802b000b00: fa fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc
>ffff88802b000b80: fa fc fc fc 02 fc fc fc fa fc fc fc fa fc fc fc
                               ^
 ffff88802b000c00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff88802b000c80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
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