================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x20c/0x210 net/mac80211/iface.c:909 Read of size 2 at addr ffff0000f5d909fb by task syz.4.69/4679 CPU: 1 PID: 4679 Comm: syz.4.69 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 Call trace: dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0xfc mm/kasan/report.c:524 __asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349 ieee80211_monitor_select_queue+0x20c/0x210 net/mac80211/iface.c:909 netdev_core_pick_tx+0x130/0x320 net/core/dev.c:4233 __dev_queue_xmit+0x738/0x3118 net/core/dev.c:4319 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3127 [inline] packet_sendmsg+0x2f9c/0x3fd0 net/packet/af_packet.c:3158 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5c8/0x938 net/socket.c:2518 ___sys_sendmsg net/socket.c:2572 [inline] __sys_sendmsg+0x288/0x374 net/socket.c:2601 __do_sys_sendmsg net/socket.c:2610 [inline] __se_sys_sendmsg net/socket.c:2608 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2608 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 4321: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ipv6_add_dev+0x118/0xed4 net/ipv6/addrconf.c:379 ipv6_find_idev+0xd4/0x1e4 net/ipv6/addrconf.c:489 inet6_rtm_newaddr+0x374/0x76c net/ipv6/addrconf.c:4954 rtnetlink_rcv_msg+0x698/0xcdc net/core/rtnetlink.c:6150 netlink_rcv_skb+0x218/0x3e8 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x60c/0x814 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6f4/0x9c0 net/netlink/af_netlink.c:1872 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x324/0x440 net/socket.c:2152 __do_sys_sendto net/socket.c:2164 [inline] __se_sys_sendto net/socket.c:2160 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2160 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 insert_work+0x64/0x37c kernel/workqueue.c:1361 __queue_work+0xcbc/0x1234 kernel/workqueue.c:1520 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:1646 call_timer_fn+0x1b8/0x95c kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1747 [inline] __run_timers+0x4d0/0x6f0 kernel/time/timer.c:2023 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2036 handle_softirqs+0x318/0xc60 kernel/softirq.c:596 __do_softirq+0x14/0x20 kernel/softirq.c:630 The buggy address belongs to the object at ffff0000f5d90000 which belongs to the cache kmalloc-cg-2k of size 2048 The buggy address is located 507 bytes to the right of 2048-byte region [ffff0000f5d90000, ffff0000f5d90800) The buggy address belongs to the physical page: page:000000002830b7a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x135d90 head:000000002830b7a4 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0003380 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f5d90880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f5d90900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000f5d90980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000f5d90a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f5d90a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================