================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x23a/0x240 net/mac80211/iface.c:909 Read of size 2 at addr ffff88804b48adfb by task syz.4.459/6665 CPU: 0 PID: 6665 Comm: syz.4.459 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 ieee80211_monitor_select_queue+0x23a/0x240 net/mac80211/iface.c:909 netdev_core_pick_tx+0x12c/0x360 net/core/dev.c:4245 __dev_queue_xmit+0xb45/0x3810 net/core/dev.c:4331 packet_snd net/packet/af_packet.c:3133 [inline] packet_sendmsg+0x3b95/0x4de0 net/packet/af_packet.c:3164 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5ed/0x9a0 net/socket.c:2519 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2573 __sys_sendmsg net/socket.c:2602 [inline] __do_sys_sendmsg net/socket.c:2611 [inline] __se_sys_sendmsg+0x1c3/0x2b0 net/socket.c:2609 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fccf119ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fccf2083028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fccf1415fa0 RCX: 00007fccf119ce59 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000008 RBP: 00007fccf1232e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fccf1416038 R14: 00007fccf1415fa0 R15: 00007ffe824913d8 Allocated by task 6441: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xb3/0x240 mm/slab_common.c:949 kmalloc_array include/linux/slab.h:615 [inline] vhost_dev_alloc_iovecs drivers/vhost/vhost.c:397 [inline] vhost_dev_set_owner+0x42a/0xa60 drivers/vhost/vhost.c:605 vhost_dev_ioctl+0xa5/0xef0 drivers/vhost/vhost.c:1776 vhost_vsock_dev_ioctl+0x23a/0xdc0 drivers/vhost/vsock.c:871 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88804b488000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3579 bytes to the right of 8192-byte region [ffff88804b488000, ffff88804b48a000) The buggy address belongs to the physical page: page:ffffea00012d2200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88804b488000 pfn:0x4b488 head:ffffea00012d2200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888017442280 raw: ffff88804b488000 0000000080020000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6166, tgid 6162 (syz.2.368), ts 185366761659, free_ts 174307640788 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560 prep_new_page mm/page_alloc.c:2567 [inline] get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658 alloc_slab_page+0x5d/0x180 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2d0 mm/slub.c:1997 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] __kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node_track_caller+0xa0/0x240 mm/slab_common.c:956 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x226/0x7d0 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1303 [inline] pfkey_send_acquire+0x5f8/0x2d70 net/key/af_key.c:3186 km_query+0x10e/0x200 net/xfrm/xfrm_state.c:2245 xfrm_state_find+0x1fbf/0x2b70 net/xfrm/xfrm_state.c:1158 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2415 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2460 [inline] xfrm_resolve_and_create_bundle+0x7b7/0x2da0 net/xfrm/xfrm_policy.c:2753 xfrm_lookup_with_ifid+0x265/0x1fc0 net/xfrm/xfrm_policy.c:3087 xfrm_lookup net/xfrm/xfrm_policy.c:3216 [inline] xfrm_lookup_route+0x38/0x1b0 net/xfrm/xfrm_policy.c:3227 udp_sendmsg+0x1637/0x23d0 net/ipv4/udp.c:1247 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1487 [inline] free_pcp_prepare mm/page_alloc.c:1537 [inline] free_unref_page_prepare+0x8e5/0x9e0 mm/page_alloc.c:3414 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] __kmem_cache_alloc_node+0x19d/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa3/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xe2/0x5c0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x212/0x440 security/tomoyo/file.c:771 security_file_open+0x5e/0xa0 security/security.c:1682 do_dentry_open+0x2fd/0x10b0 fs/open.c:869 do_open fs/namei.c:3634 [inline] path_openat+0x2674/0x2f10 fs/namei.c:3791 do_filp_open+0x1ee/0x420 fs/namei.c:3818 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 Memory state around the buggy address: ffff88804b48ac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804b48ad00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804b48ad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88804b48ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804b48ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================