device syzkaller0 entered promiscuous mode
==================================================================
BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x23a/0x240 net/mac80211/iface.c:909
Read of size 2 at addr ffff88807836b1fb by task syz.2.640/6819

CPU: 1 PID: 6819 Comm: syz.2.640 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 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+0x118/0x340 net/core/dev.c:4233
 __dev_queue_xmit+0xb19/0x37c0 net/core/dev.c:4319
 packet_snd net/packet/af_packet.c:3127 [inline]
 packet_sendmsg+0x3bc3/0x4e60 net/packet/af_packet.c:3158
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5be/0x970 net/socket.c:2518
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
 __sys_sendmsg net/socket.c:2601 [inline]
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
 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: 0033:0x7f5f4bd9c819
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:00007f5f49ff6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5f4c015fa0 RCX: 00007f5f4bd9c819
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f5f4be32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f4c016038 R14: 00007f5f4c015fa0 R15: 00007ffe9fb1a5f8
 </TASK>

Allocated by task 4256:
 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
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 alloc_pipe_info+0xe4/0x4b0 fs/pipe.c:795
 get_pipe_inode fs/pipe.c:886 [inline]
 create_pipe_files+0x85/0x700 fs/pipe.c:918
 __do_pipe_flags+0x46/0x1f0 fs/pipe.c:967
 do_pipe2+0xa7/0x190 fs/pipe.c:1015
 __do_sys_pipe2 fs/pipe.c:1033 [inline]
 __se_sys_pipe2 fs/pipe.c:1031 [inline]
 __x64_sys_pipe2+0x56/0x60 fs/pipe.c:1031
 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 ffff88807836b000
 which belongs to the cache kmalloc-cg-512 of size 512
The buggy address is located 507 bytes inside of
 512-byte region [ffff88807836b000, ffff88807836b200)

The buggy address belongs to the physical page:
page:ffffea0001e0da00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78368
head:ffffea0001e0da00 order:2 compound_mapcount:0 compound_pincount:0
memcg:ffff888030f51f01
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888017442dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff ffff888030f51f01
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4260, tgid 4260 (udevd), ts 64576054702, free_ts 64566134059
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
 prep_new_page mm/page_alloc.c:2566 [inline]
 get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
 alloc_slab_page+0x5d/0x160 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2c0 mm/slub.c:1997
 ___slab_alloc+0xbc6/0x1240 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 __kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc_node_track_caller+0x9e/0x230 mm/slab_common.c:956
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x22a/0x7e0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1303 [inline]
 alloc_skb_with_frags+0xa7/0x710 net/core/skbuff.c:6164
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2755
 unix_dgram_sendmsg+0x539/0x16e0 net/unix/af_unix.c:1945
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x2d9/0x3e0 net/socket.c:1143
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x4b1/0xa30 fs/read_write.c:584
 ksys_write+0x14c/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1486 [inline]
 free_pcp_prepare mm/page_alloc.c:1536 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3413
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3508
 free_large_kmalloc+0xfd/0x190 mm/slab_common.c:913
 skb_free_head net/core/skbuff.c:762 [inline]
 skb_release_data+0x5db/0x7c0 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 consume_skb+0xa2/0x100 net/core/skbuff.c:1035
 __unix_dgram_recvmsg+0xa19/0xdc0 net/unix/af_unix.c:2531
 sock_recvmsg_nosec net/socket.c:1022 [inline]
 sock_recvmsg net/socket.c:1040 [inline]
 sock_read_iter+0x2db/0x3a0 net/socket.c:1121
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_read+0x64d/0xb20 fs/read_write.c:796
 vfs_readv fs/read_write.c:916 [inline]
 do_readv+0x260/0x460 fs/read_write.c:953
 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

Memory state around the buggy address:
 ffff88807836b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88807836b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88807836b180: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88807836b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807836b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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