KASAN: slab-out-of-bounds Read in geneve

Kernel	Title	Repro	Count	Last	Reported	Patched	Status
upstream	KMSAN: kernel-infoleak in copyout (2) net	C	6723	316d	1484d	22/26	fixed on 2023/06/08 14:41
upstream	KMSAN: uninit-value in geneve_xmit (3) net	C	14	8d12h	16d	22/26	upstream: reported C repro on 2024/04/03 11:35
upstream	KMSAN: kernel-infoleak in _copy_to_iter (7) net	C	138977	420d	772d	22/26	fixed on 2023/02/24 13:50
linux-4.19	KASAN: use-after-free Read in geneve_xmit		1	578d	578d	0/1	auto-obsoleted due to no activity on 2023/01/16 22:54
upstream	KMSAN: uninit-value in geneve_xmit (2) net	C	12	29d	106d	26/26	fixed on 2024/03/26 00:54

================================================================== BUG: KASAN: slab-out-of-bounds in geneve_xmit_skb drivers/net/geneve.c:956 [inline] BUG: KASAN: slab-out-of-bounds in geneve_xmit+0x3524/0x3540 drivers/net/geneve.c:1082 Read of size 2 at addr ffff888028a4980b by task syz-executor.0/8440 CPU: 1 PID: 8440 Comm: syz-executor.0 Not tainted 5.15.0-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+0x6c/0x309 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 geneve_xmit_skb drivers/net/geneve.c:956 [inline] geneve_xmit+0x3524/0x3540 drivers/net/geneve.c:1082 __netdev_start_xmit include/linux/netdevice.h:4987 [inline] netdev_start_xmit include/linux/netdevice.h:5001 [inline] __dev_direct_xmit+0x527/0x730 net/core/dev.c:4294 dev_direct_xmit include/linux/netdevice.h:2978 [inline] packet_direct_xmit+0x1b8/0x2c0 net/packet/af_packet.c:281 packet_snd net/packet/af_packet.c:3052 [inline] packet_sendmsg+0x220b/0x52a0 net/packet/af_packet.c:3079 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044 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: 0033:0x7f7cf93a0ae9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7cf68f5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f7cf94b4020 RCX: 00007f7cf93a0ae9 RDX: 000000000000000e RSI: 0000000020000240 RDI: 0000000000000003 RBP: 00007f7cf93faf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff175e0d6f R14: 00007f7cf68f5300 R15: 0000000000022000 </TASK> Allocated by task 20368: kasan_save_stack+0x1b/0x40 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+0xa4/0xd0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] snmp6_alloc_dev net/ipv6/addrconf.c:360 [inline] ipv6_add_dev+0x555/0x1170 net/ipv6/addrconf.c:410 addrconf_notify+0x60e/0x1bb0 net/ipv6/addrconf.c:3510 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2002 call_netdevice_notifiers_extack net/core/dev.c:2014 [inline] call_netdevice_notifiers net/core/dev.c:2028 [inline] register_netdevice+0x1073/0x1500 net/core/dev.c:10361 veth_newlink+0x593/0xb00 drivers/net/veth.c:1726 __rtnl_newlink+0x106d/0x1750 net/core/rtnetlink.c:3458 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2491 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916 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 The buggy address belongs to the object at ffff888028a48000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2059 bytes to the right of 4096-byte region [ffff888028a48000, ffff888028a49000) The buggy address belongs to the page: page:ffffea0000a29200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28a48 head:ffffea0000a29200 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 0000000000040004 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 11803, ts 882820947357, free_ts 882730980976 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4155 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5381 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191 alloc_slab_page mm/slub.c:1770 [inline] allocate_slab mm/slub.c:1907 [inline] new_slab+0x319/0x490 mm/slub.c:1970 ___slab_alloc+0x921/0xfe0 mm/slub.c:3001 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3088 slab_alloc_node mm/slub.c:3179 [inline] slab_alloc mm/slub.c:3221 [inline] kmem_cache_alloc_trace+0x291/0x2b0 mm/slub.c:3238 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] kobject_uevent_env+0x240/0x1650 lib/kobject_uevent.c:524 netdev_queue_add_kobject net/core/net-sysfs.c:1676 [inline] netdev_queue_update_kobjects+0x37a/0x460 net/core/net-sysfs.c:1710 register_queue_kobjects net/core/net-sysfs.c:1771 [inline] netdev_register_kobject+0x35a/0x430 net/core/net-sysfs.c:2014 register_netdevice+0xd31/0x1500 net/core/dev.c:10330 __ip_tunnel_create+0x398/0x5c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2e4/0x9d0 net/ipv4/ip_tunnel.c:1070 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x40f/0xa30 net/core/net_namespace.c:326 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare+0x326/0x810 mm/page_alloc.c:1391 free_unref_page_prepare mm/page_alloc.c:3317 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3396 __unfreeze_partials+0x340/0x360 mm/slub.c:2502 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+0x95/0xb0 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_track_caller+0x1e9/0x310 mm/slub.c:4916 kstrdup+0x36/0x70 mm/util.c:60 kstrdup_const+0x53/0x80 mm/util.c:83 __kernfs_new_node+0x9d/0x8b0 fs/kernfs/dir.c:581 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:647 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:985 sysfs_add_file_mode_ns+0x226/0x540 fs/sysfs/file.c:317 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x328/0xb20 fs/sysfs/group.c:149 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:189 internal_create_groups fs/sysfs/group.c:185 [inline] sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:215 Memory state around the buggy address: ffff888028a49700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888028a49780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888028a49800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888028a49880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888028a49900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================