================================================================== BUG: KASAN: use-after-free in ieee80211_monitor_select_queue+0x210/0x214 net/mac80211/iface.c:941 Read of size 2 at addr ffff0000e04cadfb by task syz.3.213/5192 CPU: 1 PID: 5192 Comm: syz.3.213 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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:4263 __dev_queue_xmit+0x728/0x3330 net/core/dev.c:4349 dev_queue_xmit+0x24/0x34 include/linux/netdevice.h:3060 packet_snd net/packet/af_packet.c:3170 [inline] packet_sendmsg+0x2e30/0x3dbc net/packet/af_packet.c:3201 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:589 Allocated by task 4339: 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] tomoyo_realpath_from_path+0xc4/0x508 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1e4/0x49c security/tomoyo/file.c:822 tomoyo_path_unlink+0xa8/0xf4 security/tomoyo/tomoyo.c:149 security_path_unlink+0xe4/0x134 security/security.c:1193 do_unlinkat+0x27c/0x504 fs/namei.c:4441 __do_sys_unlinkat fs/namei.c:4488 [inline] __se_sys_unlinkat fs/namei.c:4481 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4481 __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:589 Freed by task 4339: 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:1735 [inline] slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1761 slab_free mm/slub.c:3694 [inline] __kmem_cache_free+0xbc/0x21c mm/slub.c:3707 kfree+0xd0/0x1a8 mm/slab_common.c:988 tomoyo_realpath_from_path+0x4c0/0x508 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1e4/0x49c security/tomoyo/file.c:822 tomoyo_path_unlink+0xa8/0xf4 security/tomoyo/tomoyo.c:149 security_path_unlink+0xe4/0x134 security/security.c:1193 do_unlinkat+0x27c/0x504 fs/namei.c:4441 __do_sys_unlinkat fs/namei.c:4488 [inline] __se_sys_unlinkat fs/namei.c:4481 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4481 __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:589 The buggy address belongs to the object at ffff0000e04ca000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3579 bytes inside of 4096-byte region [ffff0000e04ca000, ffff0000e04cb000) The buggy address belongs to the physical page: page:00000000f6773770 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1204c8 head:00000000f6773770 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002a80 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e04cac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e04cad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000e04cad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000e04cae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e04cae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================