==================================================================
BUG: KASAN: slab-use-after-free in tcp_can_ingest net/ipv4/tcp_input.c:4896 [inline]
BUG: KASAN: slab-use-after-free in tcp_prune_ofo_queue+0x37e/0x6e0 net/ipv4/tcp_input.c:5520
Read of size 4 at addr ffff888034c359a0 by task udevd/5218

CPU: 0 UID: 0 PID: 5218 Comm: udevd Not tainted 6.16.0-rc5-syzkaller-01444-g55e8757c6962 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xd2/0x2b0 mm/kasan/report.c:521
 kasan_report+0x118/0x150 mm/kasan/report.c:634
 tcp_can_ingest net/ipv4/tcp_input.c:4896 [inline]
 tcp_prune_ofo_queue+0x37e/0x6e0 net/ipv4/tcp_input.c:5520
 tcp_prune_queue net/ipv4/tcp_input.c:5575 [inline]
 tcp_try_rmem_schedule+0xb6b/0x1830 net/ipv4/tcp_input.c:4907
 tcp_data_queue+0x4e3/0x6380 net/ipv4/tcp_input.c:5192
 tcp_rcv_established+0xf9e/0x1eb0 net/ipv4/tcp_input.c:6208
 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1925
 tcp_v4_rcv+0x2676/0x2f00 net/ipv4/tcp_ipv4.c:2363
 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:239
 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:317
 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:317
 __netif_receive_skb_one_core net/core/dev.c:5975 [inline]
 __netif_receive_skb+0x143/0x380 net/core/dev.c:6088
 process_backlog+0x60e/0x14f0 net/core/dev.c:6440
 __napi_poll+0xc7/0x480 net/core/dev.c:7477
 napi_poll net/core/dev.c:7541 [inline]
 net_rx_action+0x707/0xe30 net/core/dev.c:7668
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x3a6/0x2390 arch/x86/kernel/unwind_orc.c:505
Code: 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 80 19 00 00 41 0f b6 44 24 01 83 e0 07 0f 84 75 15 00 00 83 f8 01 4c 8b 7c 24 48 <48> bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 4c 8b 6c 24 50 0f 84
RSP: 0018:ffffc90003287618 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffffffff8fb56ce0 RCX: ffffffff8fb56ce4
RDX: ffffffff9030fe36 RSI: ffffffff9030fe2a RDI: ffffffff8be29da0
RBP: dffffc0000000000 R08: 0000000000000003 R09: ffffffff8172aae5
R10: ffffc90003287798 R11: fffff52000650ef5 R12: ffffffff9030fe3a
R13: ffffffff9030fe3b R14: ffffc90003287748 R15: ffffffff8172aae5
 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x18e/0x440 mm/slub.c:4842
 inotify_read+0x43c/0xab0 fs/notify/inotify/inotify_user.c:274
 vfs_read+0x200/0x980 fs/read_write.c:570
 ksys_read+0x145/0x250 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6541cc407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffed5f7c270 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007ff654140880 RCX: 00007ff6541cc407
RDX: 0000000000000110 RSI: 00007ffed5f7c4b0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 000055c82344a100 R14: 0000000000000001 R15: 00007ffed5f7c4b0
 </TASK>

Allocated by task 6246:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249
 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:659
 alloc_skb include/linux/skbuff.h:1336 [inline]
 tcp_collapse+0xd78/0x1d80 net/ipv4/tcp_input.c:5387
 tcp_collapse_ofo_queue net/ipv4/tcp_input.c:5463 [inline]
 tcp_prune_queue net/ipv4/tcp_input.c:5562 [inline]
 tcp_try_rmem_schedule+0x6a4/0x1830 net/ipv4/tcp_input.c:4907
 tcp_data_queue_ofo net/ipv4/tcp_input.c:4929 [inline]
 tcp_data_queue+0x2223/0x6380 net/ipv4/tcp_input.c:5272
 tcp_rcv_established+0xf9e/0x1eb0 net/ipv4/tcp_input.c:6208
 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1925
 sk_backlog_rcv include/net/sock.h:1148 [inline]
 __release_sock+0x21c/0x350 net/core/sock.c:3188
 release_sock+0x5f/0x1f0 net/core/sock.c:3742
 tcp_sendmsg+0x39/0x50 net/ipv4/tcp.c:1394
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x19c/0x270 net/socket.c:729
 __sys_sendto+0x3bd/0x520 net/socket.c:2228
 __do_sys_sendto net/socket.c:2235 [inline]
 __se_sys_sendto net/socket.c:2231 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2231
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5218:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4745
 tcp_prune_ofo_queue+0x198/0x6e0 net/ipv4/tcp_input.c:5517
 tcp_prune_queue net/ipv4/tcp_input.c:5575 [inline]
 tcp_try_rmem_schedule+0xb6b/0x1830 net/ipv4/tcp_input.c:4907
 tcp_data_queue+0x4e3/0x6380 net/ipv4/tcp_input.c:5192
 tcp_rcv_established+0xf9e/0x1eb0 net/ipv4/tcp_input.c:6208
 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1925
 tcp_v4_rcv+0x2676/0x2f00 net/ipv4/tcp_ipv4.c:2363
 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:239
 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:317
 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:317
 __netif_receive_skb_one_core net/core/dev.c:5975 [inline]
 __netif_receive_skb+0x143/0x380 net/core/dev.c:6088
 process_backlog+0x60e/0x14f0 net/core/dev.c:6440
 __napi_poll+0xc7/0x480 net/core/dev.c:7477
 napi_poll net/core/dev.c:7541 [inline]
 net_rx_action+0x707/0xe30 net/core/dev.c:7668
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702

The buggy address belongs to the object at ffff888034c358c0
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 224 bytes inside of
 freed 240-byte region [ffff888034c358c0, ffff888034c359b0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34c35
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881416a28c0 ffffea0000a4e0c0 dead000000000004
raw: 0000000000000000 00000000800c000c 00000000f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5225, tgid 5225 (udevd), ts 35284168052, free_ts 35261695994
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 alloc_slab_page mm/slub.c:2451 [inline]
 allocate_slab+0x8a/0x3b0 mm/slub.c:2619
 new_slab mm/slub.c:2673 [inline]
 ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
 __slab_alloc mm/slub.c:3949 [inline]
 __slab_alloc_node mm/slub.c:4024 [inline]
 slab_alloc_node mm/slub.c:4185 [inline]
 kmem_cache_alloc_node_noprof+0x280/0x3c0 mm/slub.c:4249
 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:659
 alloc_skb include/linux/skbuff.h:1336 [inline]
 alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6665
 sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2974
 unix_dgram_sendmsg+0x4f6/0x1870 net/unix/af_unix.c:2134
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 sock_write_iter+0x258/0x330 net/socket.c:1179
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
page last free pid 5225 tgid 5225 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1248 [inline]
 __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706
 discard_slab mm/slub.c:2717 [inline]
 __put_partials+0x161/0x1c0 mm/slub.c:3186
 put_cpu_partial+0x17c/0x250 mm/slub.c:3261
 __slab_free+0x2f7/0x400 mm/slub.c:4513
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
 getname_flags+0xb8/0x540 fs/namei.c:146
 getname include/linux/fs.h:2907 [inline]
 do_sys_openat2+0xbc/0x1c0 fs/open.c:1431
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888034c35880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888034c35900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888034c35980: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888034c35a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888034c35a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	4c 89 e8             	mov    %r13,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 80 19 00 00    	jne    0x1993
  13:	41 0f b6 44 24 01    	movzbl 0x1(%r12),%eax
  19:	83 e0 07             	and    $0x7,%eax
  1c:	0f 84 75 15 00 00    	je     0x1597
  22:	83 f8 01             	cmp    $0x1,%eax
  25:	4c 8b 7c 24 48       	mov    0x48(%rsp),%r15
* 2a:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp <-- trapping instruction
  31:	fc ff df
  34:	4c 8b 64 24 20       	mov    0x20(%rsp),%r12
  39:	4c 8b 6c 24 50       	mov    0x50(%rsp),%r13
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84