================================================================== BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x23a/0x240 net/mac80211/iface.c:764 Read of size 2 at addr ffff8880237d59fb by task syz.3.187/5169 CPU: 0 PID: 5169 Comm: syz.3.187 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 ieee80211_monitor_select_queue+0x23a/0x240 net/mac80211/iface.c:764 netdev_core_pick_tx+0x118/0x2e0 net/core/dev.c:4171 __dev_queue_xmit+0x756/0x2fd0 net/core/dev.c:4248 packet_snd net/packet/af_packet.c:3089 [inline] packet_sendmsg+0x3dba/0x5060 net/packet/af_packet.c:3120 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2499 __sys_sendmsg net/socket.c:2528 [inline] __do_sys_sendmsg net/socket.c:2537 [inline] __se_sys_sendmsg+0x1af/0x290 net/socket.c:2535 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f9a2e90feb9 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:00007f9a2cb6b028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9a2eb8afa0 RCX: 00007f9a2e90feb9 RDX: 0000000000004005 RSI: 0000200000000280 RDI: 0000000000000004 RBP: 00007f9a2e97dc1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9a2eb8b038 R14: 00007f9a2eb8afa0 R15: 00007ffc6944dba8 Allocated by task 144: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 mempool_init_node+0x1db/0x470 mm/mempool.c:202 mempool_init+0x36/0x50 mm/mempool.c:231 mempool_init_slab_pool include/linux/mempool.h:62 [inline] bioset_init+0x28d/0x6c0 block/bio.c:1624 blk_alloc_queue+0xbb/0x5a0 block/blk-core.c:544 blk_mq_init_queue_data block/blk-mq.c:3164 [inline] blk_mq_init_queue+0x33/0xd0 block/blk-mq.c:3178 scsi_alloc_sdev+0x6f2/0xab0 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x1a7/0x3e90 drivers/scsi/scsi_scan.c:1157 __scsi_scan_target+0x1d4/0x1050 drivers/scsi/scsi_scan.c:1638 scsi_scan_channel drivers/scsi/scsi_scan.c:1726 [inline] scsi_scan_host_selected+0x36e/0x690 drivers/scsi/scsi_scan.c:1755 do_scsi_scan_host drivers/scsi/scsi_scan.c:1894 [inline] do_scan_async+0x11a/0x700 drivers/scsi/scsi_scan.c:1904 async_run_entry_fn+0x9f/0x3e0 kernel/async.c:127 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff8880237d5900 which belongs to the cache bio-136 of size 136 The buggy address is located 115 bytes to the right of 136-byte region [ffff8880237d5900, ffff8880237d5988) The buggy address belongs to the page: page:ffffea00008df540 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880237d5e00 pfn:0x237d5 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00008cbbc0 0000000c0000000c ffff88801fcb7a00 raw: ffff8880237d5e00 0000000080100000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 144, ts 7793234337, free_ts 7792510832 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5487 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3238 mempool_init_node+0x1db/0x470 mm/mempool.c:202 mempool_init+0x36/0x50 mm/mempool.c:231 mempool_init_slab_pool include/linux/mempool.h:62 [inline] bioset_init+0x28d/0x6c0 block/bio.c:1624 blk_alloc_queue+0xbb/0x5a0 block/blk-core.c:544 blk_mq_init_queue_data block/blk-mq.c:3164 [inline] blk_mq_init_queue+0x33/0xd0 block/blk-mq.c:3178 scsi_alloc_sdev+0x6f2/0xab0 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x1a7/0x3e90 drivers/scsi/scsi_scan.c:1157 __scsi_scan_target+0x1d4/0x1050 drivers/scsi/scsi_scan.c:1638 scsi_scan_channel drivers/scsi/scsi_scan.c:1726 [inline] scsi_scan_host_selected+0x36e/0x690 drivers/scsi/scsi_scan.c:1755 do_scsi_scan_host drivers/scsi/scsi_scan.c:1894 [inline] do_scan_async+0x11a/0x700 drivers/scsi/scsi_scan.c:1904 async_run_entry_fn+0x9f/0x3e0 kernel/async.c:127 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 __vunmap+0x8b9/0xa50 mm/vmalloc.c:2628 free_work+0x56/0x80 mm/vmalloc.c:95 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff8880237d5880: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880237d5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880237d5980: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880237d5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880237d5a80: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================