================================================================== BUG: KASAN: slab-out-of-bounds in copy_array kernel/bpf/verifier.c:1072 [inline] BUG: KASAN: slab-out-of-bounds in copy_verifier_state+0x130/0xbe0 kernel/bpf/verifier.c:1250 Write of size 88 at addr ffff888064549900 by task syz-executor.5/13724 CPU: 1 PID: 13724 Comm: syz-executor.5 Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #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+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x220 mm/kasan/report.c:417 kasan_report+0x139/0x170 mm/kasan/report.c:517 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 copy_array kernel/bpf/verifier.c:1072 [inline] copy_verifier_state+0x130/0xbe0 kernel/bpf/verifier.c:1250 pop_stack kernel/bpf/verifier.c:1314 [inline] do_check+0x8e51/0x107b0 kernel/bpf/verifier.c:14031 do_check_common+0x909/0x1800 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x107e2/0x16170 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1306/0x1be0 kernel/bpf/syscall.c:2619 __sys_bpf+0x396/0x6d0 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+0x78/0x90 kernel/bpf/syscall.c:5081 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+0x63/0xcd RIP: 0033:0x7f9cc548c0c9 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:00007f9cc6210168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9cc55abf80 RCX: 00007f9cc548c0c9 RDX: 0000000000000048 RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007f9cc54e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcacf4806f R14: 00007f9cc6210300 R15: 0000000000022000 Allocated by task 13724: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_krealloc+0xbf/0xf0 mm/kasan/common.c:439 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1361 [inline] krealloc+0xb2/0x110 mm/slab_common.c:1398 push_jmp_history kernel/bpf/verifier.c:2592 [inline] is_state_visited kernel/bpf/verifier.c:13552 [inline] do_check+0x9433/0x107b0 kernel/bpf/verifier.c:13752 do_check_common+0x909/0x1800 kernel/bpf/verifier.c:16289 do_check_main kernel/bpf/verifier.c:16352 [inline] bpf_check+0x107e2/0x16170 kernel/bpf/verifier.c:16936 bpf_prog_load+0x1306/0x1be0 kernel/bpf/syscall.c:2619 __sys_bpf+0x396/0x6d0 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+0x78/0x90 kernel/bpf/syscall.c:5081 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+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3376 cfg80211_update_known_bss+0x16a/0x9e0 cfg80211_bss_update+0x175/0x20b0 net/wireless/scan.c:1728 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2492 [inline] cfg80211_inform_bss_frame_data+0xc42/0x21e0 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x74f/0x1030 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+0x19a8/0x2d00 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1635 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 arch/x86/entry/entry_64.S:308 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3376 cfg80211_update_known_bss+0x16a/0x9e0 cfg80211_bss_update+0x175/0x20b0 net/wireless/scan.c:1728 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2492 [inline] cfg80211_inform_bss_frame_data+0xc42/0x21e0 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x74f/0x1030 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+0x19a8/0x2d00 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1635 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 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888064549900 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff888064549900, ffff888064549960) The buggy address belongs to the physical page: page:ffffea0001915240 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888064549380 pfn:0x64549 ksm flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012841780 ffffea00006379c0 dead000000000003 raw: ffff888064549380 0000000080200018 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 5177, tgid 5177 (kworker/1:7), ts 386198168142, free_ts 386053935469 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 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+0xdb/0xfd0 drivers/net/netdevsim/fib.c:1043 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x157/0x260 kernel/notifier.c:225 call_fib_notifiers+0x2d/0x60 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+0x1c39/0x3cc0 net/ipv6/ip6_fib.c:1477 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_ins_rt+0x120/0x1a0 net/ipv6/route.c:1312 __ipv6_ifa_notify+0x5ac/0xec0 net/ipv6/addrconf.c:6157 ipv6_ifa_notify net/ipv6/addrconf.c:6196 [inline] addrconf_dad_completed+0x188/0xca0 net/ipv6/addrconf.c:4209 addrconf_dad_work+0xdb4/0x16e0 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1e0/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x9e/0x190 mm/slab_common.c:975 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0x7c/0x120 mm/memcontrol.c:2892 account_slab mm/slab.h:645 [inline] allocate_slab+0x9b/0x3c0 mm/slub.c:2016 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x9e/0x190 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0x6e/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:737 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x1f6/0xd30 fs/seq_file.c:210 call_read_iter include/linux/fs.h:2180 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7cf/0xbc0 fs/read_write.c:470 ksys_read+0x19b/0x2c0 fs/read_write.c:613 Memory state around the buggy address: ffff888064549800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888064549880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888064549900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff888064549980: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff888064549a00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================