==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:1207 [inline]
BUG: KASAN: use-after-free in consume_skb+0x3c/0x250 net/core/skbuff.c:1029
Read of size 4 at addr ffff888110e6faf4 by task kworker/0:5/449

CPU: 0 PID: 449 Comm: kworker/0:5 Not tainted 6.1.25-syzkaller-00044-g060ebb378d1c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events sk_psock_destroy
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189
 __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 refcount_read include/linux/refcount.h:147 [inline]
 skb_unref include/linux/skbuff.h:1207 [inline]
 consume_skb+0x3c/0x250 net/core/skbuff.c:1029
 __sk_msg_free+0x2dd/0x370 net/core/skmsg.c:205
 sk_msg_free net/core/skmsg.c:218 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:769 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:782 [inline]
 sk_psock_destroy+0x351/0x810 net/core/skmsg.c:814
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2296
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2443
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 6535:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:333
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3418 [inline]
 kmem_cache_alloc_node+0x18a/0x2d0 mm/slub.c:3463
 __alloc_skb+0xcc/0x2c0 net/core/skbuff.c:497
 alloc_skb include/linux/skbuff.h:1275 [inline]
 alloc_skb_with_frags+0xa6/0x680 net/core/skbuff.c:6128
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2727
 unix_dgram_sendmsg+0x5b1/0x2050 net/unix/af_unix.c:1943
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 ____sys_sendmsg+0x5dc/0x9d0 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmmsg+0x3b9/0x6f0 net/socket.c:2622
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 449:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1744 [inline]
 slab_free_freelist_hook mm/slub.c:1770 [inline]
 slab_free mm/slub.c:3681 [inline]
 kmem_cache_free+0x291/0x510 mm/slub.c:3703
 kfree_skbmem+0x104/0x170
 __kfree_skb net/core/skbuff.c:869 [inline]
 kfree_skb_reason+0xdb/0x250 net/core/skbuff.c:891
 kfree_skb include/linux/skbuff.h:1224 [inline]
 sock_drop include/linux/skmsg.h:306 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:780 [inline]
 sk_psock_destroy+0x143/0x810 net/core/skmsg.c:814
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2296
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2443
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff888110e6fa00
 which belongs to the cache skbuff_head_cache of size 256
The buggy address is located 244 bytes inside of
 256-byte region [ffff888110e6fa00, ffff888110e6fb00)

The buggy address belongs to the physical page:
page:ffffea0004439bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110e6f
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004fbcbc0 dead000000000003 ffff888100233800
raw: 0000000000000000 00000000800c000c 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 102, tgid 102 (udevd), ts 192270422682, free_ts 192269903208
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2582
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2589
 get_page_from_freelist+0x2762/0x27f0 mm/page_alloc.c:4387
 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5664
 allocate_slab mm/slub.c:1959 [inline]
 new_slab+0xce/0x4c0 mm/slub.c:2012
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3200
 __slab_alloc+0x5d/0xa0 mm/slub.c:3299
 slab_alloc_node mm/slub.c:3384 [inline]
 kmem_cache_alloc_node+0x1c9/0x2d0 mm/slub.c:3463
 __alloc_skb+0xcc/0x2c0 net/core/skbuff.c:497
 alloc_skb include/linux/skbuff.h:1275 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1200 [inline]
 netlink_sendmsg+0x7a6/0xd30 net/netlink/af_netlink.c:1906
 sock_sendmsg_nosec net/socket.c:716 [inline]
 sock_sendmsg net/socket.c:736 [inline]
 ____sys_sendmsg+0x5dc/0x9d0 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2565
 __do_sys_sendmsg net/socket.c:2574 [inline]
 __se_sys_sendmsg net/socket.c:2572 [inline]
 __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2572
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1494 [inline]
 free_pcp_prepare mm/page_alloc.c:1568 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3486
 free_unref_page+0x8d/0x480 mm/page_alloc.c:3582
 free_the_page mm/page_alloc.c:794 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5753
 free_pages+0x7c/0x90 mm/page_alloc.c:5764
 _pgd_free arch/x86/mm/pgtable.c:420 [inline]
 pgd_free+0x17d/0x190 arch/x86/mm/pgtable.c:476
 mm_free_pgd kernel/fork.c:814 [inline]
 __mmdrop+0xb0/0x3e0 kernel/fork.c:865
 mmdrop include/linux/sched/mm.h:50 [inline]
 __mmput+0x304/0x310 kernel/fork.c:1283
 mmput+0x56/0x170 kernel/fork.c:1295
 exit_mm kernel/exit.c:566 [inline]
 do_exit+0xb29/0x2b80 kernel/exit.c:862
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025
 get_signal+0x169d/0x1820 kernel/signal.c:2875
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x6b/0xa0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86

Memory state around the buggy address:
 ffff888110e6f980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888110e6fa00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888110e6fa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff888110e6fb00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888110e6fb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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