==================================================================
BUG: KASAN: slab-use-after-free in dev_get_flags+0x209/0x250 net/core/dev.c:8786
Read of size 4 at addr ffff8880358e00b0 by task kworker/1:2/1460

CPU: 1 UID: 0 PID: 1460 Comm: kworker/1:2 Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: infiniband ib_cache_event_task
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 dev_get_flags+0x209/0x250 net/core/dev.c:8786
 rxe_query_port+0x13f/0x200 drivers/infiniband/sw/rxe/rxe_verbs.c:60
 __ib_query_port drivers/infiniband/core/device.c:2111 [inline]
 ib_query_port drivers/infiniband/core/device.c:2143 [inline]
 ib_query_port+0x43e/0x8a0 drivers/infiniband/core/device.c:2133
 ib_cache_update.part.0+0xdc/0xa30 drivers/infiniband/core/cache.c:1494
 ib_cache_update drivers/infiniband/core/cache.c:1568 [inline]
 ib_cache_event_task+0x1c2/0x290 drivers/infiniband/core/cache.c:1568
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 34:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141
 skb_ext_maybe_cow net/core/skbuff.c:6942 [inline]
 skb_ext_add+0xf8/0x770 net/core/skbuff.c:7016
 nf_bridge_unshare net/bridge/br_netfilter_hooks.c:169 [inline]
 br_nf_forward_ip.part.0+0x28/0x820 net/bridge/br_netfilter_hooks.c:709
 br_nf_forward_ip net/bridge/br_netfilter_hooks.c:704 [inline]
 br_nf_forward+0xf11/0x1bd0 net/bridge/br_netfilter_hooks.c:801
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
 NF_HOOK include/linux/netfilter.h:312 [inline]
 __br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
 deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
 br_flood+0x493/0x5c0 net/bridge/br_forward.c:245
 br_handle_frame_finish+0xda5/0x1c80 net/bridge/br_input.c:215
 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1195
 br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154
 NF_HOOK include/linux/netfilter.h:314 [inline]
 br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184
 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:533
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
 br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424
 __netif_receive_skb_core.constprop.0+0xa3d/0x4330 net/core/dev.c:5564
 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5668
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5783
 process_backlog+0x443/0x15f0 net/core/dev.c:6115
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6779
 napi_poll net/core/dev.c:6848 [inline]
 net_rx_action+0xa92/0x1010 net/core/dev.c:6970
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 run_ksoftirqd kernel/softirq.c:927 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919
 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 34:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free mm/slub.c:4579 [inline]
 kmem_cache_free+0x152/0x4b0 mm/slub.c:4681
 __skb_ext_put+0x102/0x2c0 net/core/skbuff.c:7101
 __skb_ext_del+0xf3/0x340 net/core/skbuff.c:7068
 skb_ext_del include/linux/skbuff.h:4843 [inline]
 nf_bridge_info_free net/bridge/br_netfilter_hooks.c:156 [inline]
 br_nf_dev_queue_xmit+0x7a2/0x2a10 net/bridge/br_netfilter_hooks.c:947
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 br_nf_post_routing+0x8ee/0x11b0 net/bridge/br_netfilter_hooks.c:994
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
 NF_HOOK include/linux/netfilter.h:312 [inline]
 br_forward_finish+0xcd/0x130 net/bridge/br_forward.c:66
 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1195
 br_nf_forward_finish+0x66a/0xba0 net/bridge/br_netfilter_hooks.c:690
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 br_nf_forward_ip.part.0+0x610/0x820 net/bridge/br_netfilter_hooks.c:744
 br_nf_forward_ip net/bridge/br_netfilter_hooks.c:704 [inline]
 br_nf_forward+0xf11/0x1bd0 net/bridge/br_netfilter_hooks.c:801
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
 NF_HOOK include/linux/netfilter.h:312 [inline]
 __br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
 deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
 br_flood+0x493/0x5c0 net/bridge/br_forward.c:245
 br_handle_frame_finish+0xda5/0x1c80 net/bridge/br_input.c:215
 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1195
 br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154
 NF_HOOK include/linux/netfilter.h:314 [inline]
 br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184
 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:533
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
 br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424
 __netif_receive_skb_core.constprop.0+0xa3d/0x4330 net/core/dev.c:5564
 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5668
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5783
 process_backlog+0x443/0x15f0 net/core/dev.c:6115
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6779
 napi_poll net/core/dev.c:6848 [inline]
 net_rx_action+0xa92/0x1010 net/core/dev.c:6970
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 run_ksoftirqd kernel/softirq.c:927 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919
 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff8880358e0000
 which belongs to the cache skbuff_ext_cache of size 184
The buggy address is located 176 bytes inside of
 freed 184-byte region [ffff8880358e0000, ffff8880358e00b8)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x358e0
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801bb56b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001f5000000 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 34, tgid 34 (ksoftirqd/3), ts 68450824459, free_ts 66359157028
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0xf7d/0x2d10 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2412 [inline]
 allocate_slab mm/slub.c:2578 [inline]
 new_slab+0x2c9/0x410 mm/slub.c:2631
 ___slab_alloc+0xdac/0x1880 mm/slub.c:3818
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4141
 skb_ext_maybe_cow net/core/skbuff.c:6942 [inline]
 skb_ext_add+0xf8/0x770 net/core/skbuff.c:7016
 nf_bridge_unshare net/bridge/br_netfilter_hooks.c:169 [inline]
 br_nf_forward_ip.part.0+0x28/0x820 net/bridge/br_netfilter_hooks.c:709
 br_nf_forward_ip net/bridge/br_netfilter_hooks.c:704 [inline]
 br_nf_forward+0xf11/0x1bd0 net/bridge/br_netfilter_hooks.c:801
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269
 NF_HOOK include/linux/netfilter.h:312 [inline]
 __br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
 deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
 br_flood+0x493/0x5c0 net/bridge/br_forward.c:245
page last free pid 5927 tgid 5927 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
 __put_partials+0x14c/0x170 mm/slub.c:3145
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_node_noprof+0x153/0x310 mm/slub.c:4186
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:668
 alloc_skb_fclone include/linux/skbuff.h:1372 [inline]
 tcp_stream_alloc_skb+0x34/0x570 net/ipv4/tcp.c:885
 tcp_sendmsg_locked+0xeb5/0x3750 net/ipv4/tcp.c:1167
 tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1357
 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:853
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 sock_write_iter+0x4ac/0x5b0 net/socket.c:1165
 new_sync_write fs/read_write.c:590 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:683
 ksys_write+0x1fa/0x260 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880358dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880358e0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880358e0080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
                                     ^
 ffff8880358e0100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880358e0180: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
==================================================================