================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:774 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x68/0x2c0 net/bluetooth/sco.c:88 Write of size 4 at addr ffff88802fae0080 by task kworker/0:0/7 CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.9.0-rc1-syzkaller-00061-g8d025e2092e2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: events sco_sock_timeout Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:774 [inline] sco_sock_timeout+0x68/0x2c0 net/bluetooth/sco.c:88 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Allocated by task 29563: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc_node_track_caller+0x220/0x470 mm/slub.c:3986 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:599 pskb_expand_head+0x240/0x11f0 net/core/skbuff.c:2245 skb_unclone include/linux/skbuff.h:1944 [inline] inet_frag_reasm_prepare+0x88c/0xb70 net/ipv4/inet_fragment.c:478 nf_ct_frag6_reasm net/ipv6/netfilter/nf_conntrack_reasm.c:326 [inline] nf_ct_frag6_queue net/ipv6/netfilter/nf_conntrack_reasm.c:287 [inline] nf_ct_frag6_gather+0x15ec/0x2970 net/ipv6/netfilter/nf_conntrack_reasm.c:482 ipv6_defrag net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:67 [inline] ipv6_defrag+0x1df/0x470 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:52 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626 nf_hook.constprop.0+0x42f/0x750 include/linux/netfilter.h:269 NF_HOOK include/linux/netfilter.h:312 [inline] ipv6_rcv+0xa4/0x680 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5538 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5652 process_backlog+0x12f/0x6f0 net/core/dev.c:5981 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6632 napi_poll net/core/dev.c:6701 [inline] net_rx_action+0x9ad/0xf10 net/core/dev.c:6816 __do_softirq+0x218/0x922 kernel/softirq.c:554 Freed by task 29563: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x129/0x390 mm/slub.c:4390 skb_kfree_head net/core/skbuff.c:1096 [inline] skb_free_head+0x110/0x1e0 net/core/skbuff.c:1108 skb_release_data+0x76c/0x990 net/core/skbuff.c:1136 skb_release_all net/core/skbuff.c:1202 [inline] __kfree_skb net/core/skbuff.c:1216 [inline] kfree_skb_reason+0x12d/0x210 net/core/skbuff.c:1252 tcp_v6_rcv+0xf1d/0x35b0 net/ipv6/tcp_ipv6.c:1944 ip6_protocol_deliver_rcu+0x188/0x1530 net/ipv6/ip6_input.c:438 ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:483 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip6_input+0xa1/0xd0 net/ipv6/ip6_input.c:492 dst_input include/net/dst.h:460 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ipv6_rcv+0x265/0x680 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core+0x12e/0x1e0 net/core/dev.c:5538 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5652 process_backlog+0x12f/0x6f0 net/core/dev.c:5981 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6632 napi_poll net/core/dev.c:6701 [inline] net_rx_action+0x9ad/0xf10 net/core/dev.c:6816 __do_softirq+0x218/0x922 kernel/softirq.c:554 The buggy address belongs to the object at ffff88802fae0000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff88802fae0000, ffff88802fae0800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2fae0 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888015442f00 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888015442f00 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea0000beb801 ffffea0000beb848 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 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 5209, tgid 5209 (syz-executor.3), ts 46106322006, free_ts 46084180835 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmalloc_trace+0x2fb/0x330 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] rtnl_newlink+0x49/0xa0 net/core/rtnetlink.c:3723 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2559 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 page last free pid 5222 tgid 5222 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc+0x1bd/0x440 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_scan_exec_realpath security/tomoyo/condition.c:243 [inline] tomoyo_condition+0xbe6/0x3ac0 security/tomoyo/condition.c:827 tomoyo_check_acl+0x1b7/0x410 security/tomoyo/domain.c:177 tomoyo_execute_permission+0x176/0x4b0 security/tomoyo/file.c:615 tomoyo_find_next_domain+0x367/0x2020 security/tomoyo/domain.c:752 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:102 [inline] tomoyo_bprm_check_security+0x12e/0x1d0 security/tomoyo/tomoyo.c:92 security_bprm_check+0x65/0xb0 security/security.c:1191 search_binary_handler fs/exec.c:1766 [inline] exec_binprm fs/exec.c:1820 [inline] bprm_execve fs/exec.c:1872 [inline] bprm_execve+0x642/0x19b0 fs/exec.c:1848 kernel_execve+0x3cf/0x4e0 fs/exec.c:2039 call_usermodehelper_exec_async+0x255/0x4c0 kernel/umh.c:110 Memory state around the buggy address: ffff88802fadff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802fae0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802fae0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802fae0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802fae0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================