================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 lib/list_debug.c:26 Read of size 8 at addr ffff888084ff9540 by task syz-executor.4/13408 CPU: 0 PID: 13408 Comm: syz-executor.4 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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 __list_add_valid+0x93/0xa0 lib/list_debug.c:26 __list_add_rcu include/linux/rculist.h:79 [inline] list_add_tail_rcu include/linux/rculist.h:128 [inline] nf_tables_bind_set+0x3df/0x870 net/netfilter/nf_tables_api.c:4643 nft_dynset_init+0xcc3/0x2210 net/netfilter/nft_dynset.c:315 nf_tables_newexpr net/netfilter/nf_tables_api.c:2750 [inline] nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2788 nft_set_elem_expr_alloc+0x27/0x280 net/netfilter/nf_tables_api.c:5316 nf_tables_newset+0x20e9/0x3360 net/netfilter/nf_tables_api.c:4417 nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652 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 RIP: 0033:0x7f8a14574ae9 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:00007f8a11aea188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8a14687f60 RCX: 00007f8a14574ae9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f8a145cef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffefda868bf R14: 00007f8a11aea300 R15: 0000000000022000 Allocated by task 13217: 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:596 [inline] kzalloc include/linux/slab.h:721 [inline] nft_expr_init+0xd5/0x2d0 net/netfilter/nf_tables_api.c:2784 nft_set_elem_expr_alloc+0x27/0x280 net/netfilter/nf_tables_api.c:5316 nf_tables_newset+0x20e9/0x3360 net/netfilter/nf_tables_api.c:4417 nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652 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 Freed by task 13217: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____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+0xf3/0x550 mm/slub.c:4552 nft_expr_destroy net/netfilter/nf_tables_api.c:2826 [inline] nft_set_elem_expr_alloc+0x220/0x280 net/netfilter/nf_tables_api.c:5335 nf_tables_newset+0x20e9/0x3360 net/netfilter/nf_tables_api.c:4417 nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652 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 Last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3550 cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1663 cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1710 cfg80211_inform_single_bss_frame_data+0x6e8/0xee0 net/wireless/scan.c:2425 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2458 ieee80211_bss_info_update+0x35b/0xb30 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x19cf/0x3130 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1466 [inline] ieee80211_iface_work+0xa65/0xd00 net/mac80211/iface.c:1520 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 Second to last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe9/0x110 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3550 cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1663 cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1710 cfg80211_inform_single_bss_frame_data+0x6e8/0xee0 net/wireless/scan.c:2425 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2458 ieee80211_bss_info_update+0x35b/0xb30 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x19cf/0x3130 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1466 [inline] ieee80211_iface_work+0xa65/0xd00 net/mac80211/iface.c:1520 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 ffff888084ff9500 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 64 bytes inside of 96-byte region [ffff888084ff9500, ffff888084ff9560) The buggy address belongs to the page: page:ffffea000213fe40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x84ff9 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea000098ac80 0000002300000003 ffff888010c41780 raw: 0000000000000000 0000000000200020 00000001ffffffff 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 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 3249, ts 3090212846652, free_ts 3090209897513 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] __kmalloc+0x303/0x320 mm/slub.c:4396 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [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_perm+0x21b/0x400 security/tomoyo/file.c:822 tomoyo_path_symlink+0x94/0xe0 security/tomoyo/tomoyo.c:199 security_path_symlink+0xdf/0x150 security/security.c:1165 do_symlinkat+0x106/0x2e0 fs/namei.c:4272 __do_sys_symlink fs/namei.c:4299 [inline] __se_sys_symlink fs/namei.c:4297 [inline] __x64_sys_symlink+0x75/0x90 fs/namei.c:4297 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 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 __vunmap+0x781/0xb70 mm/vmalloc.c:2621 __vfree+0x3c/0xd0 mm/vmalloc.c:2669 vfree+0x5a/0x90 mm/vmalloc.c:2700 __do_replace+0x16b/0x890 net/ipv6/netfilter/ip6_tables.c:1117 do_replace net/ipv4/netfilter/arp_tables.c:985 [inline] do_arpt_set_ctl+0xc0c/0xee0 net/ipv4/netfilter/arp_tables.c:1421 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3a90 net/ipv4/ip_sockglue.c:1444 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3636 __sys_setsockopt+0x2db/0x610 net/socket.c:2176 __do_sys_setsockopt net/socket.c:2187 [inline] __se_sys_setsockopt net/socket.c:2184 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184 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: ffff888084ff9400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888084ff9480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888084ff9500: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888084ff9580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888084ff9600: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================