================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x210/0x214 net/mac80211/iface.c:909 Read of size 2 at addr ffff0000dc236dfb by task syz.3.260/5053 CPU: 0 PID: 5053 Comm: syz.3.260 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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+0x210/0x214 net/mac80211/iface.c:909 netdev_core_pick_tx+0x130/0x320 net/core/dev.c:4245 __dev_queue_xmit+0x730/0x3154 net/core/dev.c:4331 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3051 packet_snd net/packet/af_packet.c:3133 [inline] packet_sendmsg+0x3034/0x40ac net/packet/af_packet.c:3164 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x588/0x90c net/socket.c:2519 ___sys_sendmsg net/socket.c:2573 [inline] __sys_sendmsg+0x288/0x374 net/socket.c:2602 __do_sys_sendmsg net/socket.c:2611 [inline] __se_sys_sendmsg net/socket.c:2609 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2609 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 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 4740: 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_krealloc+0x100/0x13c mm/kasan/common.c:443 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1332 [inline] krealloc+0x114/0x150 mm/slab_common.c:1369 realloc_array kernel/bpf/verifier.c:980 [inline] grow_stack_state kernel/bpf/verifier.c:1036 [inline] check_stack_write_fixed_off kernel/bpf/verifier.c:3217 [inline] check_stack_write+0x420/0x30e8 kernel/bpf/verifier.c:3719 check_mem_access+0x9b4/0x1698 kernel/bpf/verifier.c:5096 check_helper_call+0x2d2c/0x5188 kernel/bpf/verifier.c:7545 do_check kernel/bpf/verifier.c:12670 [inline] do_check_common+0x5cd8/0x9f10 kernel/bpf/verifier.c:14944 do_check_main kernel/bpf/verifier.c:15007 [inline] bpf_check+0x7b68/0xdc98 kernel/bpf/verifier.c:15584 bpf_prog_load+0xe2c/0x12c0 kernel/bpf/syscall.c:2651 __sys_bpf+0x494/0x660 kernel/bpf/syscall.c:5032 __do_sys_bpf kernel/bpf/syscall.c:5136 [inline] __se_sys_bpf kernel/bpf/syscall.c:5134 [inline] __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:5134 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 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 The buggy address belongs to the object at ffff0000dc234000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3579 bytes to the right of 8192-byte region [ffff0000dc234000, ffff0000dc236000) The buggy address belongs to the physical page: page:000000008a2ae564 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11c230 head:000000008a2ae564 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003843800 dead000000000004 ffff0000c0002c00 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dc236c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000dc236d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000dc236d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000dc236e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000dc236e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================