tunl0 speed is unknown, defaulting to 1000 ================================================================== BUG: KASAN: use-after-free in decode_session6+0xfc3/0x17f0 net/xfrm/xfrm_policy.c:3375 Read of size 1 at addr ffff8881476be4a9 by task kworker/1:6/3711 CPU: 1 PID: 3711 Comm: kworker/1:6 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: mld mld_ifc_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 decode_session6+0xfc3/0x17f0 net/xfrm/xfrm_policy.c:3375 __xfrm_decode_session+0x50/0xb0 net/xfrm/xfrm_policy.c:3481 xfrm_decode_session include/net/xfrm.h:1168 [inline] vti6_tnl_xmit+0x419/0x1f90 net/ipv6/ip6_vti.c:577 __netdev_start_xmit include/linux/netdevice.h:4840 [inline] netdev_start_xmit include/linux/netdevice.h:4854 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x183/0x880 net/core/dev.c:3606 sch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342 qdisc_restart net/sched/sch_generic.c:407 [inline] __qdisc_run+0x4bb/0x1710 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3880 [inline] __dev_queue_xmit+0x2299/0x3ad0 net/core/dev.c:4222 dev_queue_xmit include/linux/netdevice.h:3008 [inline] neigh_connected_output+0x3c0/0x520 net/core/neighbour.c:1581 neigh_output include/net/neighbour.h:546 [inline] ip6_finish_output2+0x564/0x1520 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x690/0x1160 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x1ed/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:445 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] mld_sendpack+0xa09/0xe70 net/ipv6/mcast.c:1820 mld_send_cr net/ipv6/mcast.c:2121 [inline] mld_ifc_work+0x71c/0xdc0 net/ipv6/mcast.c:2653 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 4850: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] copy_verifier_state+0x827/0xb80 kernel/bpf/verifier.c:1211 push_stack+0x1d2/0x560 kernel/bpf/verifier.c:1287 check_cond_jmp_op kernel/bpf/verifier.c:10223 [inline] do_check kernel/bpf/verifier.c:12450 [inline] do_check_common+0x6439/0xcc20 kernel/bpf/verifier.c:14642 do_check_main kernel/bpf/verifier.c:14705 [inline] bpf_check+0x734c/0xac10 kernel/bpf/verifier.c:15275 bpf_prog_load+0x13cb/0x2230 kernel/bpf/syscall.c:2605 __sys_bpf+0x1605/0x4cf0 kernel/bpf/syscall.c:4965 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8881476be000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1193 bytes inside of 2048-byte region [ffff8881476be000, ffff8881476be800) The buggy address belongs to the physical page: page:ffffea00051dae00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1476b8 head:ffffea00051dae00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000010200 ffffea00051db600 dead000000000002 ffff888011842000 raw: 0000000000000000 0000000080080008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7378222848, free_ts 0 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2103 alloc_pages+0x22f/0x270 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x84f/0xe80 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0x88/0x1ff drivers/acpi/acpica/dswstate.c:518 acpi_ps_execute_method+0x19d/0x61c drivers/acpi/acpica/psxface.c:134 acpi_ns_evaluate+0x6c7/0x966 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x3db/0x7f5 drivers/acpi/acpica/nsxfeval.c:354 acpi_evaluate_integer+0xbf/0x1e0 drivers/acpi/utils.c:260 acpi_bus_get_status_handle drivers/acpi/bus.c:84 [inline] acpi_bus_get_status+0x18d/0x340 drivers/acpi/bus.c:113 acpi_serdev_check_resources drivers/tty/serdev/core.c:645 [inline] acpi_serdev_add_device+0x153/0x4c0 drivers/tty/serdev/core.c:717 acpi_ns_walk_namespace+0x24c/0x42e drivers/acpi/acpica/nswalk.c:240 page_owner free stack trace missing Memory state around the buggy address: ffff8881476be380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881476be400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881476be480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881476be500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881476be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================