================================================================== BUG: KASAN: use-after-free in __nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:47 [inline] BUG: KASAN: use-after-free in nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:52 [inline] BUG: KASAN: use-after-free in nf_ct_ecache_exist include/net/netfilter/nf_conntrack_ecache.h:42 [inline] BUG: KASAN: use-after-free in nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] BUG: KASAN: use-after-free in nf_confirm+0x4f2/0x520 net/netfilter/nf_conntrack_proto.c:154 Read of size 1 at addr ffff8880235d5104 by task kworker/0:3/2934 CPU: 0 PID: 2934 Comm: kworker/0:3 Not tainted 5.18.0-syzkaller-11080-g664a393a2663 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krxrpcd rxrpc_peer_keepalive_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 __nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:47 [inline] nf_ct_ext_exist include/net/netfilter/nf_conntrack_extend.h:52 [inline] nf_ct_ecache_exist include/net/netfilter/nf_conntrack_ecache.h:42 [inline] nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:63 [inline] nf_confirm+0x4f2/0x520 net/netfilter/nf_conntrack_proto.c:154 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:620 nf_hook+0x26e/0x3d0 include/linux/netfilter.h:262 NF_HOOK_COND include/linux/netfilter.h:295 [inline] ip_output+0x1ed/0x2c0 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1571 udp_send_skb+0x8f7/0x11e0 net/ipv4/udp.c:967 udp_sendmsg+0x1d30/0x2b00 net/ipv4/udp.c:1254 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] kernel_sendmsg+0xf5/0x130 net/socket.c:754 rxrpc_send_keepalive+0x33a/0x500 net/rxrpc/output.c:669 rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:332 [inline] rxrpc_peer_keepalive_worker+0x81e/0xc80 net/rxrpc/peer_event.c:396 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Allocated by task 2979: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x94/0x310 mm/slub.c:3255 kmalloc include/linux/slab.h:600 [inline] kernfs_get_open_node fs/kernfs/file.c:547 [inline] kernfs_fop_open+0x8f9/0xbc0 fs/kernfs/file.c:693 do_dentry_open+0x789/0x1040 fs/open.c:824 do_open fs/namei.c:3477 [inline] path_openat+0x26c0/0x2ec0 fs/namei.c:3610 do_filp_open+0x277/0x4f0 fs/namei.c:3637 do_sys_openat2+0x13b/0x500 fs/open.c:1254 do_sys_open fs/open.c:1270 [inline] __do_sys_openat fs/open.c:1286 [inline] __se_sys_openat fs/open.c:1281 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1281 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 2934: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kfree+0xc6/0x210 mm/slub.c:4555 nf_conntrack_free+0x256/0x2f0 net/netfilter/nf_conntrack_core.c:1680 nf_ct_put include/net/netfilter/nf_conntrack.h:184 [inline] __nf_ct_resolve_clash+0xa2f/0x10f0 net/netfilter/nf_conntrack_core.c:1013 nf_ct_resolve_clash+0xfc/0xbd8 net/netfilter/nf_conntrack_core.c:1136 __nf_conntrack_confirm+0x1b94/0x1d50 net/netfilter/nf_conntrack_core.c:1284 nf_conntrack_confirm include/net/netfilter/nf_conntrack_core.h:62 [inline] nf_confirm+0x38b/0x520 net/netfilter/nf_conntrack_proto.c:154 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:620 nf_hook+0x26e/0x3d0 include/linux/netfilter.h:262 NF_HOOK_COND include/linux/netfilter.h:295 [inline] ip_output+0x1ed/0x2c0 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1571 udp_send_skb+0x8f7/0x11e0 net/ipv4/udp.c:967 udp_sendmsg+0x1d30/0x2b00 net/ipv4/udp.c:1254 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] kernel_sendmsg+0xf5/0x130 net/socket.c:754 rxrpc_send_keepalive+0x33a/0x500 net/rxrpc/output.c:669 rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:332 [inline] rxrpc_peer_keepalive_worker+0x81e/0xc80 net/rxrpc/peer_event.c:396 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff8880235d5100 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 4 bytes inside of 128-byte region [ffff8880235d5100, ffff8880235d5180) The buggy address belongs to the physical page: page:ffffea00008d7540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x235d5 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000001 ffff8880114418c0 raw: 0000000000000000 0000000080100010 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 2958, tgid 2958 (rcS), ts 12778802267, free_ts 11851677334 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4198 __alloc_pages+0x259/0x560 mm/page_alloc.c:5426 alloc_slab_page+0x70/0xf0 mm/slub.c:1797 allocate_slab+0x5e/0x520 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x41e/0xcd0 mm/slub.c:3002 __slab_alloc mm/slub.c:3089 [inline] slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] __kmalloc+0x2ba/0x370 mm/slub.c:4413 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] tomoyo_get_name+0x225/0x550 security/tomoyo/memory.c:173 tomoyo_assign_domain+0x369/0x7e0 security/tomoyo/domain.c:569 tomoyo_find_next_domain+0xe3f/0x1d80 security/tomoyo/domain.c:847 tomoyo_bprm_check_security+0xe3/0x130 security/tomoyo/tomoyo.c:101 security_bprm_check+0x50/0xb0 security/security.c:867 search_binary_handler fs/exec.c:1718 [inline] exec_binprm fs/exec.c:1771 [inline] bprm_execve+0x817/0x1590 fs/exec.c:1840 do_execveat_common+0x59b/0x750 fs/exec.c:1945 do_execve fs/exec.c:2015 [inline] __do_sys_execve fs/exec.c:2091 [inline] __se_sys_execve fs/exec.c:2086 [inline] __x64_sys_execve+0x8e/0xa0 fs/exec.c:2086 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x7d/0x390 mm/page_alloc.c:3438 kasan_depopulate_vmalloc_pte+0x66/0x80 mm/kasan/shadow.c:359 apply_to_pte_range mm/memory.c:2625 [inline] apply_to_pmd_range mm/memory.c:2669 [inline] apply_to_pud_range mm/memory.c:2705 [inline] apply_to_p4d_range mm/memory.c:2741 [inline] __apply_to_page_range+0x954/0xc60 mm/memory.c:2775 kasan_release_vmalloc+0x96/0xb0 mm/kasan/shadow.c:469 __purge_vmap_area_lazy+0xcaa/0x1890 mm/vmalloc.c:1722 _vm_unmap_aliases+0x474/0x500 mm/vmalloc.c:2125 change_page_attr_set_clr+0x2e8/0x6f0 arch/x86/mm/pat/set_memory.c:1732 change_page_attr_set arch/x86/mm/pat/set_memory.c:1782 [inline] set_memory_nx+0xee/0x130 arch/x86/mm/pat/set_memory.c:1975 free_init_pages arch/x86/mm/init.c:898 [inline] free_kernel_image_pages arch/x86/mm/init.c:917 [inline] free_initmem+0x71/0xc0 arch/x86/mm/init.c:944 kernel_init+0x2d/0x2b0 init/main.c:1508 ret_from_fork+0x1f/0x30 Memory state around the buggy address: ffff8880235d5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880235d5080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880235d5100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880235d5180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880235d5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================