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BUG: KASAN: slab-out-of-bounds in __skb_frag_set_page include/linux/skbuff.h:3242 [inline]
BUG: KASAN: slab-out-of-bounds in bpf_prog_test_run_xdp+0x10ac/0x1150 net/bpf/test_run.c:972
Write of size 8 at addr ffff88801a9b5000 by task syz-executor.2/25510

CPU: 1 PID: 25510 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller-11568-g0407a65f356e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 __skb_frag_set_page include/linux/skbuff.h:3242 [inline]
 bpf_prog_test_run_xdp+0x10ac/0x1150 net/bpf/test_run.c:972
 bpf_prog_test_run kernel/bpf/syscall.c:3356 [inline]
 __sys_bpf+0x1858/0x59a0 kernel/bpf/syscall.c:4658
 __do_sys_bpf kernel/bpf/syscall.c:4744 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4742 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4742
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb0fe8e8059
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb0fd1b8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb0fe9fb370 RCX: 00007fb0fe8e8059
RDX: 0000000000000048 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007fb0fe94208d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcd7ff0d4f R14: 00007fb0fd1b8300 R15: 0000000000022000
 </TASK>

Allocated by task 25510:
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc include/linux/slab.h:586 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 bpf_test_init.isra.0+0x9f/0x150 net/bpf/test_run.c:411
 bpf_prog_test_run_xdp+0x2f8/0x1150 net/bpf/test_run.c:941
 bpf_prog_test_run kernel/bpf/syscall.c:3356 [inline]
 __sys_bpf+0x1858/0x59a0 kernel/bpf/syscall.c:4658
 __do_sys_bpf kernel/bpf/syscall.c:4744 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4742 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4742
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88801a9b4000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes to the right of
 4096-byte region [ffff88801a9b4000, ffff88801a9b5000)
The buggy address belongs to the page:
page:ffffea00006a6c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a9b0
head:ffffea00006a6c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010c42140
raw: 0000000000000000 0000000080040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 7642969630, free_ts 0
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2116
 alloc_pages+0x2b1/0x310 mm/mempolicy.c:2266
 alloc_slab_page mm/slub.c:1799 [inline]
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x28a/0x3b0 mm/slub.c:2004
 ___slab_alloc+0x87c/0xe90 mm/slub.c:3018
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
 slab_alloc_node mm/slub.c:3196 [inline]
 kmem_cache_alloc_node_trace+0x116/0x310 mm/slub.c:3280
 kmalloc_node include/linux/slab.h:599 [inline]
 kzalloc_node include/linux/slab.h:726 [inline]
 bdi_alloc+0x43/0x180 mm/backing-dev.c:808
 __alloc_disk_node+0x8f/0x5c0 block/genhd.c:1294
 __blk_alloc_disk+0x35/0x70 block/genhd.c:1346
 brd_alloc drivers/block/brd.c:399 [inline]
 brd_alloc+0x386/0x8a0 drivers/block/brd.c:368
 brd_init+0x165/0x254 drivers/block/brd.c:502
 do_one_initcall+0x103/0x650 init/main.c:1297
 do_initcall_level init/main.c:1370 [inline]
 do_initcalls init/main.c:1386 [inline]
 do_basic_setup init/main.c:1405 [inline]
 kernel_init_freeable+0x6b1/0x73a init/main.c:1610
 kernel_init+0x1a/0x1d0 init/main.c:1499
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801a9b4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801a9b4f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801a9b5000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88801a9b5080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801a9b5100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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