================================================================== BUG: KASAN: use-after-free in ieee80211_monitor_select_queue+0x210/0x214 net/mac80211/iface.c:915 Read of size 2 at addr ffff000108cd2dfb by task syz.3.1122/8909 CPU: 0 PID: 8909 Comm: syz.3.1122 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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:915 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:3053 packet_snd net/packet/af_packet.c:3160 [inline] packet_sendmsg+0x2de8/0x3d64 net/packet/af_packet.c:3191 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 4285: 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_slab_alloc+0x70/0x88 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x430 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc+0x234/0x310 mm/slub.c:3383 getname_flags+0xb8/0x458 fs/namei.c:139 getname fs/namei.c:218 [inline] __do_sys_symlinkat fs/namei.c:4568 [inline] __se_sys_symlinkat fs/namei.c:4565 [inline] __arm64_sys_symlinkat+0x94/0xbc fs/namei.c:4565 __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 Freed by task 4285: 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+0x118/0x318 mm/slub.c:3709 putname+0x114/0x174 fs/namei.c:273 do_symlinkat+0x2fc/0x35c fs/namei.c:4560 __do_sys_symlinkat fs/namei.c:4568 [inline] __se_sys_symlinkat fs/namei.c:4565 [inline] __arm64_sys_symlinkat+0xa4/0xbc fs/namei.c:4565 __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 ffff000108cd2200 which belongs to the cache names_cache of size 4096 The buggy address is located 3067 bytes inside of 4096-byte region [ffff000108cd2200, ffff000108cd3200) The buggy address belongs to the physical page: page:000000001b07e2f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x148cd0 head:000000001b07e2f7 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0858300 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000108cd2c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff000108cd2d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff000108cd2d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff000108cd2e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff000108cd2e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================