================================================================== BUG: KASAN: slab-out-of-bounds in xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline] BUG: KASAN: slab-out-of-bounds in xsk_diag_fill net/xdp/xsk_diag.c:114 [inline] BUG: KASAN: slab-out-of-bounds in xsk_diag_dump+0x1456/0x1980 net/xdp/xsk_diag.c:163 Read of size 4 at addr ffff88802b2aa0e0 by task syz-executor.2/7805 CPU: 0 PID: 7805 Comm: syz-executor.2 Not tainted 6.5.0-rc7-syzkaller-00168-g7d2f353b2682 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline] xsk_diag_fill net/xdp/xsk_diag.c:114 [inline] xsk_diag_dump+0x1456/0x1980 net/xdp/xsk_diag.c:163 netlink_dump+0x656/0xcc0 net/netlink/af_netlink.c:2269 __netlink_dump_start+0x5c0/0x780 net/netlink/af_netlink.c:2376 netlink_dump_start include/linux/netlink.h:330 [inline] xsk_diag_handler_dump+0x1d7/0x260 net/xdp/xsk_diag.c:190 sock_diag_rcv_msg+0xe3/0x400 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2549 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa2a/0xd60 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] sock_write_iter+0x39a/0x520 net/socket.c:1129 do_iter_write+0x84f/0xde0 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_writev+0x27f/0x470 fs/read_write.c:976 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffa9587cae9 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:00007ffa966c10c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ffa9599bf80 RCX: 00007ffa9587cae9 RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007ffa958c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ffa9599bf80 R15: 00007ffe5503dbe8 Allocated by task 7502: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x6c/0x3b0 mm/slab.h:762 slab_alloc_node mm/slub.c:3470 [inline] kmem_cache_alloc_node+0x149/0x330 mm/slub.c:3515 kmalloc_reserve+0x8a/0x240 net/core/skbuff.c:559 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1289 [inline] alloc_skb_with_frags+0xa8/0x750 net/core/skbuff.c:6233 sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2793 sock_alloc_send_skb include/net/sock.h:1878 [inline] __ip_append_data+0x2aea/0x3ee0 net/ipv4/ip_output.c:1120 ip_make_skb+0x197/0x420 net/ipv4/ip_output.c:1552 udp_sendmsg+0x1e33/0x2c60 net/ipv4/udp.c:1260 udpv6_sendmsg+0xda1/0x3060 net/ipv6/udp.c:1407 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2494 ___sys_sendmsg net/socket.c:2548 [inline] __sys_sendmmsg+0x3b2/0x730 net/socket.c:2634 __do_sys_sendmmsg net/socket.c:2663 [inline] __se_sys_sendmmsg net/socket.c:2660 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2660 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7502: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] kmem_cache_free+0x292/0x500 mm/slub.c:3823 skb_kfree_head net/core/skbuff.c:892 [inline] skb_free_head net/core/skbuff.c:906 [inline] skb_release_data+0x637/0x850 net/core/skbuff.c:936 skb_release_all net/core/skbuff.c:1002 [inline] __kfree_skb net/core/skbuff.c:1016 [inline] kfree_skb_reason+0x193/0x380 net/core/skbuff.c:1052 kfree_skb include/linux/skbuff.h:1237 [inline] xfrm_input+0x45de/0x6b90 net/xfrm/xfrm_input.c:732 tunnel4_rcv+0xd4/0x2c0 net/ipv4/tunnel4.c:103 ip_protocol_deliver_rcu+0x208/0x3f0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x28e/0x4c0 net/ipv4/ip_input.c:233 NF_HOOK+0x368/0x410 include/linux/netfilter.h:303 NF_HOOK+0x368/0x410 include/linux/netfilter.h:303 __netif_receive_skb_one_core net/core/dev.c:5452 [inline] __netif_receive_skb+0x1ca/0x530 net/core/dev.c:5566 process_backlog+0x34b/0x710 net/core/dev.c:5894 __napi_poll+0xc7/0x470 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x78b/0x1010 net/core/dev.c:6660 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 The buggy address belongs to the object at ffff88802b2a9e00 which belongs to the cache skbuff_small_head of size 640 The buggy address is located 96 bytes to the right of allocated 640-byte region [ffff88802b2a9e00, ffff88802b2aa080) The buggy address belongs to the physical page: page:ffffea0000acaa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b2a8 head:ffffea0000acaa00 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888141e6b780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 7502, tgid 7501 (syz-executor.0), ts 264876349845, free_ts 264766441385 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 alloc_slab_page+0x6a/0x160 mm/slub.c:1862 allocate_slab mm/slub.c:2009 [inline] new_slab+0x84/0x2f0 mm/slub.c:2062 ___slab_alloc+0xade/0x1100 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] kmem_cache_alloc_node+0x1e2/0x330 mm/slub.c:3515 kmalloc_reserve+0x8a/0x240 net/core/skbuff.c:559 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1289 [inline] alloc_skb_with_frags+0xa8/0x750 net/core/skbuff.c:6233 sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2793 sock_alloc_send_skb include/net/sock.h:1878 [inline] __ip_append_data+0x2aea/0x3ee0 net/ipv4/ip_output.c:1120 ip_make_skb+0x197/0x420 net/ipv4/ip_output.c:1552 udp_sendmsg+0x1e33/0x2c60 net/ipv4/udp.c:1260 udpv6_sendmsg+0xda1/0x3060 net/ipv6/udp.c:1407 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] ____sys_sendmsg+0x592/0x890 net/socket.c:2494 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2443 __stack_depot_save+0x4ef/0x650 lib/stackdepot.c:443 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x61/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3814 devinet_exit_net+0x206/0x230 net/ipv4/devinet.c:2762 ops_exit_list net/core/net_namespace.c:170 [inline] setup_net+0x8c8/0xbb0 net/core/net_namespace.c:362 copy_net_ns+0x4e3/0x7a0 net/core/net_namespace.c:491 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x122/0x170 kernel/nsproxy.c:228 ksys_unshare+0x584/0xb20 kernel/fork.c:3438 __do_sys_unshare kernel/fork.c:3509 [inline] __se_sys_unshare kernel/fork.c:3507 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3507 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88802b2a9f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802b2aa000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802b2aa080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802b2aa100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802b2aa180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================