================================================================== 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 ffff888077973f04 by task syz-executor.0/5815 CPU: 0 PID: 5815 Comm: syz-executor.0 Not tainted 5.18.0-syzkaller-11650-g2a5699b0de4e #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+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_data_packet+0xc1c/0x1d20 net/rxrpc/output.c:451 rxrpc_queue_packet net/rxrpc/sendmsg.c:258 [inline] rxrpc_send_data+0x171e/0x2700 net/rxrpc/sendmsg.c:437 rxrpc_do_sendmsg+0x16ca/0x1a20 net/rxrpc/sendmsg.c:750 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2492 ___sys_sendmsg net/socket.c:2546 [inline] __sys_sendmmsg+0x3d8/0x740 net/socket.c:2632 __do_sys_sendmmsg net/socket.c:2661 [inline] __se_sys_sendmmsg net/socket.c:2658 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2658 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 RIP: 0033:0x7f2105289109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2106309168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f210539bf60 RCX: 00007f2105289109 RDX: 0000000000000002 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f21052e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf009908f R14: 00007f2106309300 R15: 0000000000022000 Allocated by task 3686: 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] dummy_urb_enqueue+0x78/0x790 drivers/usb/gadget/udc/dummy_hcd.c:1270 usb_hcd_submit_urb+0x2be/0x5f0 drivers/usb/core/hcd.c:1555 usb_start_wait_urb+0x10e/0x510 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x2a5/0x4b0 drivers/usb/core/message.c:153 usb_control_msg_recv+0xbb/0x160 drivers/usb/core/message.c:279 ath3k_get_version drivers/bluetooth/ath3k.c:267 [inline] ath3k_load_syscfg drivers/bluetooth/ath3k.c:421 [inline] ath3k_probe+0x4dc/0x7d0 drivers/bluetooth/ath3k.c:490 usb_probe_interface+0x66e/0xb60 drivers/usb/core/driver.c:396 call_driver_probe+0x96/0x250 really_probe+0x220/0x940 drivers/base/dd.c:621 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:754 driver_probe_device+0x50/0x240 drivers/base/dd.c:784 __device_attach_driver+0x254/0x3a0 drivers/base/dd.c:901 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32e/0x570 drivers/base/dd.c:972 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0xb20/0xf90 drivers/base/core.c:3402 usb_set_configuration+0x1a5f/0x20e0 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x131/0x260 drivers/usb/core/driver.c:293 call_driver_probe+0x96/0x250 really_probe+0x220/0x940 drivers/base/dd.c:621 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:754 driver_probe_device+0x50/0x240 drivers/base/dd.c:784 __device_attach_driver+0x254/0x3a0 drivers/base/dd.c:901 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32e/0x570 drivers/base/dd.c:972 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0xb20/0xf90 drivers/base/core.c:3402 usb_new_device+0xbfc/0x18a0 drivers/usb/core/hub.c:2566 hub_port_connect+0x106b/0x2930 drivers/usb/core/hub.c:5363 hub_port_connect_change+0x619/0xbe0 drivers/usb/core/hub.c:5507 port_event+0xe72/0x13a0 drivers/usb/core/hub.c:5665 hub_event+0x5be/0xd70 drivers/usb/core/hub.c:5747 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 Freed by task 5815: 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_data_packet+0xc1c/0x1d20 net/rxrpc/output.c:451 rxrpc_queue_packet net/rxrpc/sendmsg.c:258 [inline] rxrpc_send_data+0x171e/0x2700 net/rxrpc/sendmsg.c:437 rxrpc_do_sendmsg+0x16ca/0x1a20 net/rxrpc/sendmsg.c:750 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2492 ___sys_sendmsg net/socket.c:2546 [inline] __sys_sendmmsg+0x3d8/0x740 net/socket.c:2632 __do_sys_sendmmsg net/socket.c:2661 [inline] __se_sys_sendmmsg net/socket.c:2658 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2658 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 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x840 kernel/rcu/tree.c:3647 __hw_addr_flush net/core/dev_addr_lists.c:490 [inline] dev_addr_flush+0x17b/0x220 net/core/dev_addr_lists.c:535 free_netdev+0x1f3/0x4e0 net/core/dev.c:10698 netdev_run_todo+0xeec/0x1070 net/core/dev.c:10352 default_device_exit_batch+0x665/0x6d0 net/core/dev.c:11329 ops_exit_list net/core/net_namespace.c:167 [inline] cleanup_net+0x80c/0xc50 net/core/net_namespace.c:594 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 ffff888077973f00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 4 bytes inside of 128-byte region [ffff888077973f00, ffff888077973f80) The buggy address belongs to the physical page: page:ffffea0001de5cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888077973900 pfn:0x77973 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea000196e480 dead000000000005 ffff8880114418c0 raw: ffff888077973900 000000008010000f 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4336, tgid 4336 (dhcpcd-run-hook), ts 167653238271, free_ts 167645560987 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_pages_node include/linux/gfp.h:587 [inline] alloc_slab_page+0x2e/0xf0 mm/slub.c:1799 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] __kmalloc_node+0x2c0/0x400 mm/slub.c:4461 kmalloc_array_node include/linux/slab.h:695 [inline] kcalloc_node include/linux/slab.h:700 [inline] memcg_alloc_slab_cgroups+0x7c/0x120 mm/memcontrol.c:2818 account_slab mm/slab.h:653 [inline] allocate_slab+0xa6/0x520 mm/slub.c:1958 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] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x246/0x2f0 mm/slub.c:3239 vm_area_dup+0x23/0x1c0 kernel/fork.c:467 dup_mmap+0x6a9/0xfc0 kernel/fork.c:641 dup_mm+0x8c/0x310 kernel/fork.c:1524 copy_mm+0x102/0x190 kernel/fork.c:1576 copy_process+0x1856/0x3f70 kernel/fork.c:2237 kernel_clone+0x22f/0x7a0 kernel/fork.c:2642 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_list+0x12c/0x890 mm/page_alloc.c:3475 release_pages+0x2a04/0x2cb0 mm/swap.c:980 tlb_batch_pages_flush mm/mmu_gather.c:58 [inline] tlb_flush_mmu_free mm/mmu_gather.c:255 [inline] tlb_flush_mmu+0x850/0xa70 mm/mmu_gather.c:262 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:353 exit_mmap+0x1dc/0x530 mm/mmap.c:3164 __mmput+0x111/0x3a0 kernel/fork.c:1187 exit_mm+0x211/0x2f0 kernel/exit.c:510 do_exit+0x4ca/0x1ed0 kernel/exit.c:782 do_group_exit+0x23b/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:934 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 Memory state around the buggy address: ffff888077973e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888077973e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888077973f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888077973f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077974000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================