================================================================== BUG: KASAN: slab-out-of-bounds in copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 Write of size 80 at addr ffff888029e83b80 by task syz-executor.4/11012 CPU: 1 PID: 11012 Comm: syz-executor.4 Not tainted 6.2.0-rc1-next-20221226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 memcpy+0x3d/0x60 mm/kasan/shadow.c:66 copy_array+0x96/0x100 kernel/bpf/verifier.c:1072 copy_verifier_state+0xa9/0xc60 kernel/bpf/verifier.c:1250 pop_stack+0x8c/0x2f0 kernel/bpf/verifier.c:1314 do_check kernel/bpf/verifier.c:14038 [inline] do_check_common+0x5663/0xbd00 kernel/bpf/verifier.c:16296 do_check_main kernel/bpf/verifier.c:16359 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16943 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1435/0x5000 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5081 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 RIP: 0033:0x7fc87f68c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007fc880441168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc87f7ac050 RCX: 00007fc87f68c0c9 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007fc87f6e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffedb6dd48f R14: 00007fc880441300 R15: 0000000000022000 Allocated by task 11012: 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:376 [inline] ____kasan_kmalloc mm/kasan/common.c:335 [inline] __kasan_krealloc+0x145/0x180 mm/kasan/common.c:444 kasan_krealloc include/linux/kasan.h:232 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0xa8/0x100 mm/slab_common.c:1398 push_jmp_history+0x13e/0x330 kernel/bpf/verifier.c:2592 is_state_visited kernel/bpf/verifier.c:13559 [inline] do_check kernel/bpf/verifier.c:13759 [inline] do_check_common+0x50e5/0xbd00 kernel/bpf/verifier.c:16296 do_check_main kernel/bpf/verifier.c:16359 [inline] bpf_check+0x7348/0xacc0 kernel/bpf/verifier.c:16943 bpf_prog_load+0x1543/0x2230 kernel/bpf/syscall.c:2619 __sys_bpf+0x1435/0x5000 kernel/bpf/syscall.c:4979 __do_sys_bpf kernel/bpf/syscall.c:5083 [inline] __se_sys_bpf kernel/bpf/syscall.c:5081 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5081 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 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3376 cfg80211_update_known_bss+0x827/0xa70 net/wireless/scan.c:1681 cfg80211_bss_update+0xf3/0x21b0 net/wireless/scan.c:1728 cfg80211_inform_single_bss_frame_data+0x761/0xfc0 net/wireless/scan.c:2492 cfg80211_inform_bss_frame_data+0xc3/0xc80 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x35c/0xaf0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1992/0x2f80 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1635 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888029e83b80 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff888029e83b80, ffff888029e83be0) The buggy address belongs to the physical page: page:ffffea0000a7a0c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888029e83a80 pfn:0x29e83 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012441780 ffffea0001ef3c80 dead000000000002 raw: ffff888029e83a80 000000008020001f 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5126, tgid 5126 (kworker/1:3), ts 327423646979, free_ts 326357285776 prep_new_page mm/page_alloc.c:2546 [inline] get_page_from_freelist+0x119e/0x2a80 mm/page_alloc.c:4298 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5564 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2282 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 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+0x1a4/0x430 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline] nsim_fib_event_nb+0x1ba/0xe30 drivers/net/netdevsim/fib.c:1043 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 atomic_notifier_call_chain+0x74/0x180 kernel/notifier.c:225 call_fib_notifiers+0x11d/0x2a0 net/core/fib_notifier.c:35 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:401 [inline] fib6_add_rt2node net/ipv6/ip6_fib.c:1223 [inline] fib6_add+0xe25/0x3f20 net/ipv6/ip6_fib.c:1477 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1312 __ipv6_ifa_notify+0x8c7/0xb60 net/ipv6/addrconf.c:6157 ipv6_ifa_notify net/ipv6/addrconf.c:6196 [inline] addrconf_dad_completed+0x133/0xda0 net/ipv6/addrconf.c:4209 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1448 [inline] free_pcp_prepare+0x4d0/0x9e0 mm/page_alloc.c:1498 free_unref_page_prepare mm/page_alloc.c:3384 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3479 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+0x66/0x90 mm/kasan/common.c:307 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1ea/0x430 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x4d/0xd0 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kzalloc_node include/linux/slab.h:731 [inline] qdisc_alloc+0xb0/0xb00 net/sched/sch_generic.c:938 qdisc_create_dflt+0x79/0x540 net/sched/sch_generic.c:996 attach_one_default_qdisc net/sched/sch_generic.c:1151 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2464 [inline] attach_default_qdiscs net/sched/sch_generic.c:1169 [inline] dev_activate+0x764/0xce0 net/sched/sch_generic.c:1228 __dev_open+0x393/0x4d0 net/core/dev.c:1426 __dev_change_flags+0x587/0x750 net/core/dev.c:8530 dev_change_flags+0x97/0x170 net/core/dev.c:8602 do_setlink+0x9f1/0x3bb0 net/core/rtnetlink.c:2827 __rtnl_newlink+0xd69/0x1840 net/core/rtnetlink.c:3590 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3637 Memory state around the buggy address: ffff888029e83a80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888029e83b00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff888029e83b80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888029e83c00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888029e83c80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================