================================================================== BUG: KASAN: invalid-free in slab_free mm/slub.c:3787 [inline] BUG: KASAN: invalid-free in kmem_cache_free+0xec/0x4e0 mm/slub.c:3809 Free of addr ffff888028649000 by task syz-executor.3/11384 CPU: 1 PID: 11384 Comm: syz-executor.3 Not tainted 6.2.0-syzkaller-13563-gf915322fe014 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report_invalid_free+0xe8/0x100 mm/kasan/report.c:501 ____kasan_slab_free+0x1a5/0x1c0 mm/kasan/common.c:216 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0xec/0x4e0 mm/slub.c:3809 skb_kfree_head net/core/skbuff.c:857 [inline] skb_kfree_head net/core/skbuff.c:853 [inline] skb_free_head+0x16f/0x1a0 net/core/skbuff.c:872 skb_release_data+0x57a/0x820 net/core/skbuff.c:901 skb_release_all net/core/skbuff.c:966 [inline] __kfree_skb+0x4f/0x70 net/core/skbuff.c:980 tcp_wmem_free_skb include/net/tcp.h:302 [inline] tcp_rtx_queue_purge net/ipv4/tcp.c:3062 [inline] tcp_write_queue_purge+0x617/0xcf0 net/ipv4/tcp.c:3075 tcp_v4_destroy_sock+0x127/0x850 net/ipv4/tcp_ipv4.c:2302 inet_csk_destroy_sock+0x19a/0x450 net/ipv4/inet_connection_sock.c:1195 __tcp_close+0xb8a/0xf70 net/ipv4/tcp.c:3022 tcp_close+0x2d/0xc0 net/ipv4/tcp.c:3034 inet_release+0x132/0x270 net/ipv4/af_inet.c:426 __sock_release+0xcd/0x290 net/socket.c:651 sock_close+0x1c/0x20 net/socket.c:1393 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3eb743dfab Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffdf71edf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f3eb743dfab RDX: 00007f3eb7000788 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f3eb75ad980 R08: 0000000000000000 R09: 00007f3eb7000000 R10: 00007f3eb7000790 R11: 0000000000000293 R12: 0000000000091bbb R13: 00007ffdf71ee010 R14: 00007f3eb75abf80 R15: 0000000000000032 Allocated by task 11390: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0x5b/0xc0 mm/slab_common.c:987 kmalloc_reserve+0xf1/0x230 net/core/skbuff.c:539 pskb_expand_head+0x237/0x1160 net/core/skbuff.c:1995 __skb_unclone_keeptruesize+0x93/0x220 net/core/skbuff.c:2094 skb_unclone_keeptruesize include/linux/skbuff.h:1910 [inline] skb_prepare_for_shift net/core/skbuff.c:3804 [inline] skb_shift+0xef8/0x1e20 net/core/skbuff.c:3877 tcp_skb_shift net/ipv4/tcp_input.c:1538 [inline] tcp_shift_skb_data net/ipv4/tcp_input.c:1646 [inline] tcp_sacktag_walk+0x93b/0x18a0 net/ipv4/tcp_input.c:1713 tcp_sacktag_write_queue+0x1599/0x31d0 net/ipv4/tcp_input.c:1974 tcp_ack+0x2e9f/0x5a10 net/ipv4/tcp_input.c:3847 tcp_rcv_established+0x667/0x22a0 net/ipv4/tcp_input.c:6006 tcp_v4_do_rcv+0x663/0x9d0 net/ipv4/tcp_ipv4.c:1721 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2921 release_sock+0x58/0x1b0 net/core/sock.c:3488 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1485 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xde/0x190 net/socket.c:745 __sys_sendto+0x23a/0x340 net/socket.c:2145 __do_sys_sendto net/socket.c:2157 [inline] __se_sys_sendto net/socket.c:2153 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2153 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888028649000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes inside of 1024-byte region [ffff888028649000, ffff888028649400) The buggy address belongs to the physical page: page:ffffea0000a19200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28648 head:ffffea0000a19200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5172, tgid 5172 (kworker/0:6), ts 251433285825, free_ts 250414500123 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x1190/0x2f80 mm/page_alloc.c:4325 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5591 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:987 kmalloc_reserve+0xf1/0x230 net/core/skbuff.c:539 __alloc_skb+0x129/0x330 net/core/skbuff.c:608 alloc_skb include/linux/skbuff.h:1277 [inline] nlmsg_new include/net/netlink.h:1003 [inline] inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166 fib6_add_rt2node net/ipv6/ip6_fib.c:1251 [inline] fib6_add+0x200d/0x4080 net/ipv6/ip6_fib.c:1477 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_route_add+0x8f/0x150 net/ipv6/route.c:3840 addrconf_add_mroute+0x1e0/0x350 net/ipv6/addrconf.c:2489 addrconf_add_dev+0x156/0x1c0 net/ipv6/addrconf.c:2507 addrconf_dev_config net/ipv6/addrconf.c:3382 [inline] addrconf_init_auto_addrs+0x3c4/0x8a0 net/ipv6/addrconf.c:3469 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare+0x668/0xb50 mm/page_alloc.c:1503 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3482 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x17c/0x320 mm/slub.c:3476 fib_table_insert+0x75f/0x1be0 net/ipv4/fib_trie.c:1362 fib_magic+0x493/0x580 net/ipv4/fib_frontend.c:1101 fib_add_ifaddr+0x16f/0x560 net/ipv4/fib_frontend.c:1123 fib_inetaddr_event+0x166/0x2a0 net/ipv4/fib_frontend.c:1437 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 blocking_notifier_call_chain kernel/notifier.c:382 [inline] blocking_notifier_call_chain+0x6b/0xa0 kernel/notifier.c:370 __inet_insert_ifa+0x955/0xc10 net/ipv4/devinet.c:555 inet_rtm_newaddr+0x579/0x9d0 net/ipv4/devinet.c:961 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174 Memory state around the buggy address: ffff888028648f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888028648f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888028649000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888028649080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888028649100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================