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BUG: KASAN: stack-out-of-bounds in bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline]
BUG: KASAN: stack-out-of-bounds in xdp_do_check_flushed+0x231/0x240 net/core/filter.c:4305
Read of size 4 at addr ffffc9000f5f77f8 by task syz.1.785/8273

CPU: 1 UID: 0 PID: 8273 Comm: syz.1.785 Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 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
 bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline]
 xdp_do_check_flushed+0x231/0x240 net/core/filter.c:4305
 __napi_poll+0xe4/0x490 net/core/dev.c:6774
 napi_poll net/core/dev.c:6840 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6962
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
 __dev_queue_xmit+0x1763/0x3e90 net/core/dev.c:4450
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip6_finish_output2+0xfc2/0x1680 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip6_xmit+0xefe/0x17f0 net/ipv6/ip6_output.c:358
 sctp_v6_xmit+0x9f2/0x13f0 net/sctp/ipv6.c:248
 sctp_packet_transmit+0x26af/0x2ca0 net/sctp/output.c:653
 sctp_packet_singleton+0x22c/0x320 net/sctp/outqueue.c:783
 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline]
 sctp_outq_flush+0x6d5/0x3e20 net/sctp/outqueue.c:1212
 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline]
 sctp_do_sm+0x59cc/0x60c0 net/sctp/sm_sideeffect.c:1169
 sctp_primitive_ASSOCIATE+0x95/0xc0 net/sctp/primitive.c:73
 sctp_sendmsg_to_asoc+0xfa5/0x1800 net/sctp/socket.c:1841
 sctp_sendmsg+0x1bc3/0x3520 net/sctp/socket.c:2031
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3314177299
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3313bff048 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3314305f80 RCX: 00007f3314177299
RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007f33141e48e6 R08: 0000000020000100 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3314305f80 R15: 00007ffd13a16048
 </TASK>

The buggy address belongs to stack of task syz.1.785/8273
 and is located at offset 472 in frame:
 sctp_do_sm+0x0/0x60c0

This frame has 2 objects:
 [32, 44) 'sackh.i'
 [64, 400) 'commands'

The buggy address belongs to the virtual mapping at
 [ffffc9000f5f0000, ffffc9000f5f9000) created by:
 copy_process+0x5d1/0x3dc0 kernel/fork.c:2204

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x1002d2 pfn:0x7c06e
memcg:ffff888021273d82
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 00000000001002d2 0000000000000000 00000001ffffffff ffff888021273d82
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 8271, tgid 8271 (syz.1.785), ts 335576698857, free_ts 335108094093
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
 vm_area_alloc_pages mm/vmalloc.c:3584 [inline]
 __vmalloc_area_node mm/vmalloc.c:3660 [inline]
 __vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3841
 alloc_thread_stack_node kernel/fork.c:313 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1113
 copy_process+0x5d1/0x3dc0 kernel/fork.c:2204
 kernel_clone+0x223/0x870 kernel/fork.c:2781
 __do_sys_clone3 kernel/fork.c:3085 [inline]
 __se_sys_clone3+0x2cb/0x350 kernel/fork.c:3064
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8257 tgid 8253 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_folios+0x100f/0x1ac0 mm/page_alloc.c:2660
 folios_put_refs+0x76e/0x860 mm/swap.c:1039
 folio_batch_release include/linux/pagevec.h:101 [inline]
 truncate_inode_pages_range+0x47b/0xfc0 mm/truncate.c:346
 kill_bdev block/bdev.c:90 [inline]
 blkdev_flush_mapping+0x108/0x250 block/bdev.c:664
 blkdev_put_whole block/bdev.c:671 [inline]
 bdev_release+0x466/0x700 block/bdev.c:1096
 blkdev_release+0x15/0x20 block/fops.c:638
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:222
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x1695/0x1730 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffffc9000f5f7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000f5f7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000f5f7780: 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3
                                                                ^
 ffffc9000f5f7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000f5f7880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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