================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x210/0x214 net/mac80211/iface.c:941 Read of size 2 at addr ffff000104146dfb by task syz.3.1030/8361 CPU: 1 PID: 8361 Comm: syz.3.1030 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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:941 netdev_core_pick_tx+0x130/0x320 net/core/dev.c:4246 __dev_queue_xmit+0x730/0x3154 net/core/dev.c:4332 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3056 packet_snd net/packet/af_packet.c:3163 [inline] packet_sendmsg+0x2de8/0x3d64 net/packet/af_packet.c:3194 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+0x58/0x12c 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 8324: 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] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xd8/0x180 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] io_alloc_hash_table+0x38/0xc8 io_uring/io_uring.c:252 io_ring_ctx_alloc+0x144/0x9c0 io_uring/io_uring.c:281 io_uring_create+0x1f8/0xb34 io_uring/io_uring.c:3637 io_uring_setup io_uring/io_uring.c:3793 [inline] __do_sys_io_uring_setup io_uring/io_uring.c:3799 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:3796 [inline] __arm64_sys_io_uring_setup+0x2a4/0x2e8 io_uring/io_uring.c:3796 __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+0x58/0x12c 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 Freed by task 8291: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:237 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:245 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1755 slab_free mm/slub.c:3687 [inline] __kmem_cache_free+0xbc/0x21c mm/slub.c:3700 kfree+0xd0/0x1a8 mm/slab_common.c:988 io_ring_ctx_free+0x6c0/0x868 io_uring/io_uring.c:2772 io_ring_exit_work+0x580/0x5e8 io_uring/io_uring.c:2938 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 The buggy address belongs to the object at ffff000104144000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3579 bytes to the right of 8192-byte region [ffff000104144000, ffff000104146000) The buggy address belongs to the physical page: page:000000003b3b40ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144140 head:000000003b3b40ca order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002c00 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000104146c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff000104146d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff000104146d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff000104146e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff000104146e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================