==================================================================
BUG: KASAN: use-after-free in __ptr_ring_peek include/linux/ptr_ring.h:172 [inline]
BUG: KASAN: use-after-free in __ptr_ring_consume include/linux/ptr_ring.h:299 [inline]
BUG: KASAN: use-after-free in veth_xdp_rcv+0x70b/0x810 drivers/net/veth.c:856
Read of size 8 at addr ffff88802229f128 by task ksoftirqd/0/13

CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.15.0-rc3-next-20211001-syzkaller #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/0x320 mm/kasan/report.c:247
 __kasan_report mm/kasan/report.c:433 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:450
 __ptr_ring_peek include/linux/ptr_ring.h:172 [inline]
 __ptr_ring_consume include/linux/ptr_ring.h:299 [inline]
 veth_xdp_rcv+0x70b/0x810 drivers/net/veth.c:856
 veth_poll+0x134/0x850 drivers/net/veth.c:913
 __napi_poll+0xaf/0x440 net/core/dev.c:6994
 napi_poll net/core/dev.c:7061 [inline]
 net_rx_action+0x801/0xb40 net/core/dev.c:7148
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:921 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Allocated by task 11441:
 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:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:522
 kmalloc_node include/linux/slab.h:616 [inline]
 kvmalloc_node+0x61/0x120 mm/util.c:587
 kvmalloc include/linux/slab.h:749 [inline]
 kvmalloc_array include/linux/slab.h:770 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline]
 ptr_ring_init include/linux/ptr_ring.h:489 [inline]
 __veth_napi_enable_range+0xa2/0x780 drivers/net/veth.c:941
 __veth_napi_enable drivers/net/veth.c:964 [inline]
 veth_enable_xdp+0x30f/0x620 drivers/net/veth.c:1068
 veth_xdp_set drivers/net/veth.c:1483 [inline]
 veth_xdp+0x4d4/0x780 drivers/net/veth.c:1523
 dev_xdp_install+0xd5/0x270 net/core/dev.c:9366
 dev_xdp_attach+0x83d/0x1010 net/core/dev.c:9514
 dev_change_xdp_fd+0x246/0x300 net/core/dev.c:9754
 do_setlink+0x2fb4/0x3970 net/core/rtnetlink.c:2931
 rtnl_group_changelink net/core/rtnetlink.c:3242 [inline]
 __rtnl_newlink+0xc06/0x1750 net/core/rtnetlink.c:3396
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506
 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 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

Freed by task 31301:
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1700 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1726
 slab_free mm/slub.c:3492 [inline]
 kfree+0xf6/0x560 mm/slub.c:4540
 kvfree+0x42/0x50 mm/util.c:620
 ptr_ring_cleanup include/linux/ptr_ring.h:671 [inline]
 veth_napi_del_range+0x3aa/0x560 drivers/net/veth.c:985
 veth_napi_del drivers/net/veth.c:991 [inline]
 veth_disable_xdp+0x2b3/0x430 drivers/net/veth.c:1101
 veth_xdp_set drivers/net/veth.c:1499 [inline]
 veth_xdp+0x698/0x780 drivers/net/veth.c:1523
 dev_xdp_install+0x1ed/0x270 net/core/dev.c:9366
 dev_xdp_attach+0x83d/0x1010 net/core/dev.c:9514
 dev_change_xdp_fd+0x246/0x300 net/core/dev.c:9754
 do_setlink+0x2fb4/0x3970 net/core/rtnetlink.c:2931
 rtnl_group_changelink net/core/rtnetlink.c:3242 [inline]
 __rtnl_newlink+0xc06/0x1750 net/core/rtnetlink.c:3396
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506
 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 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

Last potentially related work creation:
 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xf5/0x120 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:2996 [inline]
 call_rcu+0xb1/0x740 kernel/rcu/tree.c:3076
 netlink_release+0xdd4/0x1dd0 net/netlink/af_netlink.c:812
 __sock_release net/socket.c:649 [inline]
 sock_release+0x87/0x1b0 net/socket.c:677
 netlink_kernel_release+0x4b/0x60 net/netlink/af_netlink.c:2117
 rdma_dev_exit_net+0x32e/0x550 drivers/infiniband/core/device.c:1151
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff88802229f000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 296 bytes inside of
 2048-byte region [ffff88802229f000, ffff88802229f800)
The buggy address belongs to the page:
page:ffffea000088a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888022299000 pfn:0x22298
head:ffffea000088a600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0000c1c408 ffffea0000dc3408 ffff888010c42000
raw: ffff888022299000 0000000000080001 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6555, ts 171189187133, free_ts 171187313578
 prep_new_page mm/page_alloc.c:2416 [inline]
 get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4147
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5382
 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2197
 alloc_slab_page mm/slub.c:1770 [inline]
 allocate_slab mm/slub.c:1907 [inline]
 new_slab+0x32d/0x4a0 mm/slub.c:1970
 ___slab_alloc+0x947/0x1040 mm/slub.c:3001
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3088
 slab_alloc_node mm/slub.c:3179 [inline]
 __kmalloc_node_track_caller+0x2d5/0x350 mm/slub.c:4935
 kmalloc_reserve net/core/skbuff.c:352 [inline]
 pskb_expand_head+0x15e/0x1060 net/core/skbuff.c:1699
 netlink_trim+0x1ea/0x240 net/netlink/af_netlink.c:1296
 netlink_broadcast_filtered+0x60/0xda0 net/netlink/af_netlink.c:1501
 netlink_broadcast net/netlink/af_netlink.c:1546 [inline]
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0x94/0x290 net/netlink/af_netlink.c:2547
 rtnl_notify net/core/rtnetlink.c:730 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:3833 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:3848 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:3836 [inline]
 rtmsg_ifinfo+0xf0/0x120 net/core/rtnetlink.c:3854
 __dev_notify_flags+0x226/0x2b0 net/core/dev.c:8803
 dev_change_flags+0x112/0x170 net/core/dev.c:8845
 do_setlink+0x96d/0x3970 net/core/rtnetlink.c:2719
 __rtnl_newlink+0xde6/0x1750 net/core/rtnetlink.c:3391
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1336 [inline]
 free_pcp_prepare+0x373/0x870 mm/page_alloc.c:1387
 free_unref_page_prepare mm/page_alloc.c:3307 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3386
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:259 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:3213 [inline]
 slab_alloc mm/slub.c:3221 [inline]
 __kmalloc+0x1e7/0x320 mm/slub.c:4398
 kmalloc include/linux/slab.h:597 [inline]
 kzalloc include/linux/slab.h:729 [inline]
 tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45
 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline]
 tomoyo_encode+0x28/0x50 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x186/0x620 security/tomoyo/realpath.c:288
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723
 security_file_ioctl+0x50/0xb0 security/security.c:1540
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:860
 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

Memory state around the buggy address:
 ffff88802229f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802229f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802229f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88802229f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802229f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================