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SMTP id 006d021491bc7-6876c5f1433mr3402166eaf.34.1775651700985; Wed, 08 Apr 2026 05:35:00 -0700 (PDT) Date: Wed, 08 Apr 2026 05:35:00 -0700 In-Reply-To: <20260408070257.2437291-1-kadlec@netfilter.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69d64b74.050a0220.adfb3.0003.GAE@google.com> Subject: [syzbot ci] Re: netfilter: ipset: concurrent add and dump fixes From: syzbot ci To: fw@strlen.de, kadlec@netfilter.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] netfilter: ipset: concurrent add and dump fixes https://lore.kernel.org/all/20260408070257.2437291-1-kadlec@netfilter.org * [PATCH 1/2] netfilter: ipset: Fix data race between add and list header in all hash types * [PATCH 2/2] netfilter: ipset: Fix data race between add and dump in all hash types and found the following issues: * KASAN: slab-out-of-bounds Write in hash_ip4_add * KASAN: slab-out-of-bounds Write in hash_ipport4_add * KASAN: slab-out-of-bounds Write in hash_ipport6_add * KASAN: slab-out-of-bounds Write in hash_ipportnet6_add * KASAN: slab-out-of-bounds Write in hash_netnet4_add Full report is available here: https://ci.syzbot.org/series/05533f07-931b-4bbe-886e-737c3dded97b *** KASAN: slab-out-of-bounds Write in hash_ip4_add tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: 47117877d5707b32773bb3d5fd8f1f9aaf8f1f3b arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8ee93551-dc97-4078-8c85-f884da5dc0bf/config syz repro: https://ci.syzbot.org/findings/09c3128d-24de-48b4-9d49-798ba00bda6e/syz_repro ================================================================== BUG: KASAN: slab-out-of-bounds in hash_ip4_add+0x1063/0x1f20 net/netfilter/ipset/ip_set_hash_gen.h:974 Write of size 4 at addr ffff8881a844a680 by task syz.2.19/5958 CPU: 1 UID: 0 PID: 5958 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 hash_ip4_add+0x1063/0x1f20 net/netfilter/ipset/ip_set_hash_gen.h:974 hash_ip4_uadt+0x664/0x860 net/netfilter/ipset/ip_set_hash_ip.c:160 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc54039c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc53f9fe028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc540615fa0 RCX: 00007fc54039c819 RDX: 0000000004000084 RSI: 0000200000000000 RDI: 0000000000000004 RBP: 00007fc540432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc540616038 R14: 00007fc540615fa0 R15: 00007ffe3b0d6a38 Allocated by task 5958: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ip4_add+0xc85/0x1f20 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ip4_uadt+0x664/0x860 net/netfilter/ipset/ip_set_hash_ip.c:160 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8881a844a600 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes to the right of allocated 128-byte region [ffff8881a844a600, ffff8881a844a680) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a844a flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000000 ffff888100041a00 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800100010 00000000f5000000 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5958, tgid 5957 (syz.2.19), ts 61144574473, free_ts 60982422209 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x474/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ip4_add+0xc85/0x1f20 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ip4_uadt+0x664/0x860 net/netfilter/ipset/ip_set_hash_ip.c:160 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 page last free pid 23 tgid 23 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978 __tlb_remove_table_free mm/mmu_gather.c:228 [inline] tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291 rcu_do_batch kernel/rcu/tree.c:2617 [inline] rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff8881a844a580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881a844a600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881a844a680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881a844a700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881a844a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== *** KASAN: slab-out-of-bounds Write in hash_ipport4_add tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: 47117877d5707b32773bb3d5fd8f1f9aaf8f1f3b arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8ee93551-dc97-4078-8c85-f884da5dc0bf/config syz repro: https://ci.syzbot.org/findings/d9446937-fb89-49b6-8e0d-0765ed1dc490/syz_repro ================================================================== BUG: KASAN: slab-out-of-bounds in hash_ipport4_add+0x1218/0x22a0 net/netfilter/ipset/ip_set_hash_gen.h:974 Write of size 8 at addr ffff88810c5a8bb0 by task syz.1.18/5959 CPU: 0 UID: 0 PID: 5959 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 hash_ipport4_add+0x1218/0x22a0 net/netfilter/ipset/ip_set_hash_gen.h:974 hash_ipport4_uadt+0xaaf/0xde0 net/netfilter/ipset/ip_set_hash_ipport.c:199 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f73b079c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f73b1662028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f73b0a15fa0 RCX: 00007f73b079c819 RDX: 0000000000000090 RSI: 00002000000002c0 RDI: 0000000000000004 RBP: 00007f73b0832c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f73b0a16038 R14: 00007f73b0a15fa0 R15: 00007fffcac649b8 Allocated by task 5959: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ipport4_add+0xec2/0x22a0 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ipport4_uadt+0xaaf/0xde0 net/netfilter/ipset/ip_set_hash_ipport.c:199 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88810c5a8b80 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of allocated 48-byte region [ffff88810c5a8b80, ffff88810c5a8bb0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c5a8 flags: 0x17ff00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 017ff00000000000 ffff8881000418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800200020 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 28, tgid 28 (kworker/u9:1), ts 11978057194, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_node_noprof+0x577/0x7c0 mm/slub.c:5266 kmalloc_node_noprof include/linux/slab.h:1081 [inline] __vmalloc_area_node mm/vmalloc.c:3855 [inline] __vmalloc_node_range_noprof+0x5d5/0x1730 mm/vmalloc.c:4064 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct+0x275/0x9a0 kernel/fork.c:924 copy_process+0x508/0x3cd0 kernel/fork.c:2050 kernel_clone+0x248/0x8e0 kernel/fork.c:2653 user_mode_thread+0x110/0x180 kernel/fork.c:2729 call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:171 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440 page_owner free stack trace missing Memory state around the buggy address: ffff88810c5a8a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88810c5a8b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88810c5a8b80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff88810c5a8c00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff88810c5a8c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== *** KASAN: slab-out-of-bounds Write in hash_ipport6_add tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: 47117877d5707b32773bb3d5fd8f1f9aaf8f1f3b arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8ee93551-dc97-4078-8c85-f884da5dc0bf/config syz repro: https://ci.syzbot.org/findings/5fc445de-91e9-4261-89a2-d6004861bc11/syz_repro ================================================================== BUG: KASAN: slab-out-of-bounds in hash_ipport6_add+0x12fd/0x2260 net/netfilter/ipset/ip_set_hash_gen.h:974 Write of size 20 at addr ffff888110798c48 by task syz.2.19/6005 CPU: 0 UID: 0 PID: 6005 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 hash_ipport6_add+0x12fd/0x2260 net/netfilter/ipset/ip_set_hash_gen.h:974 hash_ipport6_uadt+0x85d/0xb20 net/netfilter/ipset/ip_set_hash_ipport.c:351 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1edcf9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1eddde0028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1edd215fa0 RCX: 00007f1edcf9c819 RDX: 0000000000000090 RSI: 00002000000002c0 RDI: 0000000000000004 RBP: 00007f1edd032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1edd216038 R14: 00007f1edd215fa0 R15: 00007ffd74c43f58 Allocated by task 6005: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ipport6_add+0xfb6/0x2260 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ipport6_uadt+0x85d/0xb20 net/netfilter/ipset/ip_set_hash_ipport.c:351 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888110798c00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 72-byte region [ffff888110798c00, ffff888110798c48) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110798 flags: 0x17ff00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 017ff00000000000 ffff888100041280 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800200020 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1094, tgid 1094 (kworker/u9:3), ts 19156789334, free_ts 19155777767 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __kmalloc_cache_node_noprof+0x465/0x6b0 mm/slub.c:5388 kmalloc_node_noprof include/linux/slab.h:1077 [inline] __get_vm_area_node+0x13f/0x300 mm/vmalloc.c:3221 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct+0x275/0x9a0 kernel/fork.c:924 copy_process+0x508/0x3cd0 kernel/fork.c:2050 kernel_clone+0x248/0x8e0 kernel/fork.c:2653 user_mode_thread+0x110/0x180 kernel/fork.c:2729 call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:171 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359 page last free pid 1094 tgid 1094 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct+0x275/0x9a0 kernel/fork.c:924 copy_process+0x508/0x3cd0 kernel/fork.c:2050 kernel_clone+0x248/0x8e0 kernel/fork.c:2653 user_mode_thread+0x110/0x180 kernel/fork.c:2729 call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:171 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888110798b00: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff888110798b80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff888110798c00: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ^ ffff888110798c80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888110798d00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ================================================================== *** KASAN: slab-out-of-bounds Write in hash_ipportnet6_add tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: 47117877d5707b32773bb3d5fd8f1f9aaf8f1f3b arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8ee93551-dc97-4078-8c85-f884da5dc0bf/config syz repro: https://ci.syzbot.org/findings/9a835a65-c731-420b-98c9-76cbdfe4d5e7/syz_repro ================================================================== BUG: KASAN: slab-out-of-bounds in hash_ipportnet6_add+0x1eab/0x2ef0 net/netfilter/ipset/ip_set_hash_gen.h:974 Write of size 36 at addr ffff88812055d068 by task syz.0.17/5970 CPU: 0 UID: 0 PID: 5970 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 hash_ipportnet6_add+0x1eab/0x2ef0 net/netfilter/ipset/ip_set_hash_gen.h:974 hash_ipportnet6_uadt+0xa88/0xe00 net/netfilter/ipset/ip_set_hash_ipportnet.c:504 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe1ad9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe1bccc028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbe1b015fa0 RCX: 00007fbe1ad9c819 RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000004 RBP: 00007fbe1ae32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbe1b016038 R14: 00007fbe1b015fa0 R15: 00007ffe829d96c8 Allocated by task 5970: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ipportnet6_add+0x11fe/0x2ef0 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ipportnet6_uadt+0xa88/0xe00 net/netfilter/ipset/ip_set_hash_ipportnet.c:504 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88812055d000 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes to the right of allocated 104-byte region [ffff88812055d000, ffff88812055d068) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12055d flags: 0x17ff00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 017ff00000000000 ffff888100041a00 dead000000000122 0000000000000000 raw: 0000000000000000 0000000800100010 00000000f5000000 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5970, tgid 5969 (syz.0.17), ts 62254504797, free_ts 59906136451 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x474/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_ipportnet6_add+0x11fe/0x2ef0 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_ipportnet6_uadt+0xa88/0xe00 net/netfilter/ipset/ip_set_hash_ipportnet.c:504 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 page last free pid 5885 tgid 5885 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978 vfree+0x25a/0x400 mm/vmalloc.c:3479 kcov_put kernel/kcov.c:442 [inline] kcov_close+0x28/0x50 kernel/kcov.c:543 __fput+0x44f/0xa70 fs/file_table.c:469 task_work_run+0x1d9/0x270 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x70f/0x23c0 kernel/exit.c:976 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118 get_signal+0x1284/0x1330 kernel/signal.c:3034 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88812055cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ffff88812055cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88812055d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ^ ffff88812055d080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812055d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ================================================================== *** KASAN: slab-out-of-bounds Write in hash_netnet4_add tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: 47117877d5707b32773bb3d5fd8f1f9aaf8f1f3b arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8ee93551-dc97-4078-8c85-f884da5dc0bf/config syz repro: https://ci.syzbot.org/findings/72f192ce-33b7-4dd0-b1e5-1666100981b0/syz_repro ================================================================== BUG: KASAN: slab-out-of-bounds in hash_netnet4_add+0x1852/0x27d0 net/netfilter/ipset/ip_set_hash_gen.h:974 Write of size 16 at addr ffff8881125a9f40 by task syz.1.18/5970 CPU: 0 UID: 0 PID: 5970 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 hash_netnet4_add+0x1852/0x27d0 net/netfilter/ipset/ip_set_hash_gen.h:974 hash_netnet4_uadt+0xc06/0xf20 net/netfilter/ipset/ip_set_hash_netnet.c:269 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f23ac39c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f23ad2b1028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f23ac615fa0 RCX: 00007f23ac39c819 RDX: 0000000000000004 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f23ac432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f23ac616038 R14: 00007f23ac615fa0 R15: 00007fff91226648 Allocated by task 5970: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] hash_netnet4_add+0xe44/0x27d0 net/netfilter/ipset/ip_set_hash_gen.h:881 hash_netnet4_uadt+0xc06/0xf20 net/netfilter/ipset/ip_set_hash_netnet.c:269 call_ad+0x18d/0xb60 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x824/0x9d0 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xc00/0x12c0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x2c0/0x27b0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:721 [inline] __sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2585 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2639 __sys_sendmsg net/socket.c:2671 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2674 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8881125a9f00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of allocated 64-byte region [ffff8881125a9f00, ffff8881125a9f40) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1125a9 flags: 0x17ff00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 017ff00000000000 ffff8881000418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800200020 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 55, tgid 55 (kworker/u9:2), ts 19909977372, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_node_noprof+0x577/0x7c0 mm/slub.c:5266 kmalloc_node_noprof include/linux/slab.h:1081 [inline] __vmalloc_area_node mm/vmalloc.c:3855 [inline] __vmalloc_node_range_noprof+0x5d5/0x1730 mm/vmalloc.c:4064 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct+0x275/0x9a0 kernel/fork.c:924 copy_process+0x508/0x3cd0 kernel/fork.c:2050 kernel_clone+0x248/0x8e0 kernel/fork.c:2653 user_mode_thread+0x110/0x180 kernel/fork.c:2729 call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:171 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440 page_owner free stack trace missing Memory state around the buggy address: ffff8881125a9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8881125a9e80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc >ffff8881125a9f00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8881125a9f80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8881125aa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported.