==================================================================
BUG: KASAN: slab-use-after-free in skb_update_prio net/core/dev.c:3855 [inline]
BUG: KASAN: slab-use-after-free in __dev_queue_xmit+0x37d1/0x3d40 net/core/dev.c:4272
Read of size 8 at addr ffff88801bddcbb0 by task aoe_tx0/1240

CPU: 1 PID: 1240 Comm: aoe_tx0 Not tainted 6.7.0-rc4-next-20231207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 skb_update_prio net/core/dev.c:3855 [inline]
 __dev_queue_xmit+0x37d1/0x3d40 net/core/dev.c:4272
 dev_queue_xmit include/linux/netdevice.h:3165 [inline]
 tx+0x76/0x100 drivers/block/aoe/aoenet.c:62
 kthread+0x1e7/0x3c0 drivers/block/aoe/aoecmd.c:1229
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>

Allocated by task 11812:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_set_track+0x24/0x30 mm/kasan/common.c:61
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slub.c:3985 [inline]
 __kmalloc_node+0x226/0x480 mm/slub.c:3992
 kmalloc_node include/linux/slab.h:610 [inline]
 kvmalloc_node+0x6f/0x1a0 mm/util.c:617
 kvmalloc include/linux/slab.h:728 [inline]
 kvzalloc include/linux/slab.h:736 [inline]
 alloc_netdev_mqs+0x9b/0x1270 net/core/dev.c:10820
 sixpack_open+0xfc/0xb30 drivers/net/hamradio/6pack.c:558
 tty_ldisc_open+0x98/0x110 drivers/tty/tty_ldisc.c:432
 tty_set_ldisc+0x2e2/0x680 drivers/tty/tty_ldisc.c:557
 tiocsetd drivers/tty/tty_io.c:2439 [inline]
 tty_ioctl+0xbc6/0x1570 drivers/tty/tty_io.c:2736
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a

Freed by task 11804:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_set_track+0x24/0x30 mm/kasan/common.c:61
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:556
 ____kasan_slab_free mm/kasan/common.c:237 [inline]
 ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:201
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4303 [inline]
 kfree+0x129/0x370 mm/slub.c:4413
 kvfree+0x47/0x50 mm/util.c:663
 device_release+0xa1/0x240 drivers/base/core.c:2485
 kobject_cleanup lib/kobject.c:682 [inline]
 kobject_release lib/kobject.c:716 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1d0/0x440 lib/kobject.c:733
 put_device+0x1f/0x30 drivers/base/core.c:3733
 free_netdev+0x408/0x5f0 net/core/dev.c:10970
 sixpack_close+0x23d/0x2d0 drivers/net/hamradio/6pack.c:682
 tty_ldisc_close+0x111/0x190 drivers/tty/tty_ldisc.c:455
 tty_ldisc_kill+0x8e/0x150 drivers/tty/tty_ldisc.c:607
 tty_ldisc_release+0x116/0x2a0 drivers/tty/tty_ldisc.c:775
 tty_release_struct+0x23/0xe0 drivers/tty/tty_io.c:1696
 tty_release+0xe2c/0x1420 drivers/tty/tty_io.c:1867
 __fput+0x270/0xbb0 fs/file_table.c:381
 __fput_sync+0x47/0x50 fs/file_table.c:466
 __do_sys_close fs/open.c:1591 [inline]
 __se_sys_close fs/open.c:1576 [inline]
 __x64_sys_close+0x86/0xf0 fs/open.c:1576
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a

The buggy address belongs to the object at ffff88801bddc000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 2992 bytes inside of
 freed 8192-byte region [ffff88801bddc000, ffff88801bdde000)

The buggy address belongs to the physical page:
page:ffffea00006f7600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bdd8
head:ffffea00006f7600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880197b8be1
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff88801304f640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080020002 00000001ffffffff ffff8880197b8be1
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9241, tgid 9232 (syz-executor.1), ts 449315140958, free_ts 447642877135
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1540
 prep_new_page mm/page_alloc.c:1547 [inline]
 get_page_from_freelist+0xa19/0x3740 mm/page_alloc.c:3355
 __alloc_pages+0x22e/0x2410 mm/page_alloc.c:4611
 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
 alloc_slab_page mm/slub.c:2191 [inline]
 allocate_slab mm/slub.c:2358 [inline]
 new_slab+0x283/0x3c0 mm/slub.c:2411
 ___slab_alloc+0x4ab/0x1990 mm/slub.c:3544
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3629
 __slab_alloc_node mm/slub.c:3682 [inline]
 slab_alloc_node mm/slub.c:3854 [inline]
 __do_kmalloc_node mm/slub.c:3984 [inline]
 __kmalloc_node+0x36e/0x480 mm/slub.c:3992
 kmalloc_node include/linux/slab.h:610 [inline]
 kvmalloc_node+0x6f/0x1a0 mm/util.c:617
 kvmalloc include/linux/slab.h:728 [inline]
 kvzalloc include/linux/slab.h:736 [inline]
 alloc_netdev_mqs+0x9b/0x1270 net/core/dev.c:10820
 sixpack_open+0xfc/0xb30 drivers/net/hamradio/6pack.c:558
 tty_ldisc_open+0x98/0x110 drivers/tty/tty_ldisc.c:432
 tty_set_ldisc+0x2e2/0x680 drivers/tty/tty_ldisc.c:557
 tiocsetd drivers/tty/tty_io.c:2439 [inline]
 tty_ioctl+0xbc6/0x1570 drivers/tty/tty_io.c:2736
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
page last free pid 4514 tgid 4514 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x51f/0xb10 mm/page_alloc.c:2390
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2530
 __put_partials+0x14c/0x160 mm/slub.c:2926
 qlink_free mm/kasan/quarantine.c:178 [inline]
 qlist_free_all+0xc1/0x1e0 mm/kasan/quarantine.c:194
 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:301
 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:306
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slub.c:3817 [inline]
 slab_alloc_node mm/slub.c:3864 [inline]
 kmem_cache_alloc+0x136/0x320 mm/slub.c:3871
 getname_flags.part.0+0x50/0x4e0 fs/namei.c:140
 getname_flags+0x9b/0xf0 include/linux/audit.h:321
 user_path_at_empty+0x2c/0x60 fs/namei.c:2919
 do_readlinkat+0xdd/0x310 fs/stat.c:499
 __do_sys_readlink fs/stat.c:532 [inline]
 __se_sys_readlink fs/stat.c:529 [inline]
 __x64_sys_readlink+0x78/0xb0 fs/stat.c:529
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a

Memory state around the buggy address:
 ffff88801bddca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801bddcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801bddcb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88801bddcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801bddcc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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