==================================================================
BUG: KASAN: slab-use-after-free in sk_fullsock include/net/sock.h:2803 [inline]
BUG: KASAN: slab-use-after-free in ip_skb_dst_mtu+0x830/0x9b0 include/net/ip.h:499
Read of size 1 at addr ffff88807ecd4012 by task dhcpcd-run-hook/5600

CPU: 1 PID: 5600 Comm: dhcpcd-run-hook Not tainted 6.8.0-syzkaller-05218-ge30cef001da2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 sk_fullsock include/net/sock.h:2803 [inline]
 ip_skb_dst_mtu+0x830/0x9b0 include/net/ip.h:499
 __ip_finish_output+0x12b/0x400 net/ipv4/ip_output.c:306
 ipvlan_process_v4_outbound+0x3ef/0x700 drivers/net/ipvlan/ipvlan_core.c:442
 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:540 [inline]
 ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]
 ipvlan_queue_xmit+0xaa2/0x11f0 drivers/net/ipvlan/ipvlan_core.c:668
 ipvlan_start_xmit+0x4a/0x150 drivers/net/ipvlan/ipvlan_main.c:222
 __netdev_start_xmit include/linux/netdevice.h:4903 [inline]
 netdev_start_xmit include/linux/netdevice.h:4917 [inline]
 xmit_one net/core/dev.c:3531 [inline]
 dev_hard_start_xmit+0x26a/0x790 net/core/dev.c:3547
 sch_direct_xmit+0x2b6/0x5f0 net/sched/sch_generic.c:343
 qdisc_restart net/sched/sch_generic.c:408 [inline]
 __qdisc_run+0xbed/0x2150 net/sched/sch_generic.c:416
 qdisc_run+0xda/0x270 include/net/pkt_sched.h:127
 net_tx_action+0x877/0xa30 net/core/dev.c:5200
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp2+0x11/0x90 kernel/kcov.c:297
Code: 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 65 48 8b 14 25 80 ce 03 00 <65> 8b 05 60 da 6e 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83
RSP: 0018:ffffc90004fd71b8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88807b310000
RDX: ffff88807b310000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: ffffc90004fd7290 R08: ffffffff81f53403 R09: ffffffff81f52883
R10: 0000000000000004 R11: ffff88807b310000 R12: 0000000000000000
R13: ffffffffffffffff R14: 1ffffffff28a3588 R15: 0000000000000000
 alloc_pages_mpol+0x193/0x650
 pagetable_alloc include/linux/mm.h:2842 [inline]
 __pte_alloc_one include/asm-generic/pgalloc.h:68 [inline]
 pte_alloc_one+0x88/0x5d0 arch/x86/mm/pgtable.c:33
 __do_fault+0xd0/0x460 mm/memory.c:4391
 do_cow_fault mm/memory.c:4788 [inline]
 do_fault mm/memory.c:4890 [inline]
 do_pte_missing mm/memory.c:3745 [inline]
 handle_pte_fault mm/memory.c:5164 [inline]
 __handle_mm_fault+0x21fe/0x72d0 mm/memory.c:5305
 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5470
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2a8/0x890 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_stos_alternative+0x40/0x80 arch/x86/lib/clear_page_64.S:96
Code: ff c7 48 ff c9 75 f6 c3 cc cc cc cc 48 89 07 48 83 c7 08 83 e9 08 74 ef 83 f9 08 73 ef eb de 66 2e 0f 1f 84 00 00 00 00 00 90 <48> 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47
RSP: 0018:ffffc90004fd7990 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000f30 RCX: 0000000000000f30
RDX: 0000000000000000 RSI: ffffffff8baad3a0 RDI: 00007fcc7e0140d0
RBP: 1ffff11002254719 R08: ffffffff8f86ae2f R09: 1ffffffff1f0d5c5
R10: dffffc0000000000 R11: fffffbfff1f0d5c6 R12: 00007fcc7e0140d0
R13: ffff8880112a38a8 R14: 00007fcc7e014298 R15: ffff8880112a38c8
 __clear_user arch/x86/include/asm/uaccess_64.h:172 [inline]
 clear_user arch/x86/include/asm/uaccess_64.h:189 [inline]
 padzero fs/binfmt_elf.c:125 [inline]
 elf_load+0x4c5/0x6f0 fs/binfmt_elf.c:421
 load_elf_interp+0x443/0xac0 fs/binfmt_elf.c:675
 load_elf_binary+0x190f/0x2590 fs/binfmt_elf.c:1200
 search_binary_handler fs/exec.c:1777 [inline]
 exec_binprm fs/exec.c:1819 [inline]
 bprm_execve+0xaf8/0x1790 fs/exec.c:1871
 do_execveat_common+0x553/0x700 fs/exec.c:1978
 do_execve fs/exec.c:2052 [inline]
 __do_sys_execve fs/exec.c:2128 [inline]
 __se_sys_execve fs/exec.c:2123 [inline]
 __x64_sys_execve+0x92/0xb0 fs/exec.c:2123
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f780b33bef7
Code: Unable to access opcode bytes at 0x7f780b33becd.
RSP: 002b:00007f780b1e5e78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00007ffd4893afa0 RCX: 00007f780b33bef7
RDX: 000055fe2564d5c0 RSI: 00007ffd4893b490 RDI: 000055fe1f629df6
RBP: 00007f780b1e5ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffd4893b2b8
R13: 00007f780b1e5f28 R14: 0000000000000000 R15: 0000000000000041
 </TASK>

Allocated by task 5599:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:3981 [inline]
 __kmalloc+0x231/0x4a0 mm/slub.c:3994
 kmalloc include/linux/slab.h:594 [inline]
 sk_prot_alloc+0xe0/0x210 net/core/sock.c:2080
 sk_alloc+0x38/0x370 net/core/sock.c:2133
 packet_create+0x104/0x790 net/packet/af_packet.c:3354
 __sock_create+0x490/0x920 net/socket.c:1571
 sock_create net/socket.c:1622 [inline]
 __sys_socket_create net/socket.c:1659 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1706
 __do_sys_socket net/socket.c:1720 [inline]
 __se_sys_socket net/socket.c:1718 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1718
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Freed by task 5600:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kfree+0x14a/0x380 mm/slub.c:4409
 sk_prot_free net/core/sock.c:2116 [inline]
 __sk_destruct+0x476/0x5f0 net/core/sock.c:2208
 skb_orphan include/linux/skbuff.h:3198 [inline]
 ip_defrag+0x20a/0x26b0 net/ipv4/ip_fragment.c:490
 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:32 [inline]
 ipv4_conntrack_defrag+0x3de/0x5a0 net/ipv4/netfilter/nf_defrag_ipv4.c:87
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269
 __ip_local_out+0x3d9/0x4e0 net/ipv4/ip_output.c:118
 ip_local_out+0x26/0x70 net/ipv4/ip_output.c:127
 ipvlan_process_v4_outbound+0x3ef/0x700 drivers/net/ipvlan/ipvlan_core.c:442
 ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:540 [inline]
 ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline]
 ipvlan_queue_xmit+0xaa2/0x11f0 drivers/net/ipvlan/ipvlan_core.c:668
 ipvlan_start_xmit+0x4a/0x150 drivers/net/ipvlan/ipvlan_main.c:222
 __netdev_start_xmit include/linux/netdevice.h:4903 [inline]
 netdev_start_xmit include/linux/netdevice.h:4917 [inline]
 xmit_one net/core/dev.c:3531 [inline]
 dev_hard_start_xmit+0x26a/0x790 net/core/dev.c:3547
 sch_direct_xmit+0x2b6/0x5f0 net/sched/sch_generic.c:343
 qdisc_restart net/sched/sch_generic.c:408 [inline]
 __qdisc_run+0xbed/0x2150 net/sched/sch_generic.c:416
 qdisc_run+0xda/0x270 include/net/pkt_sched.h:127
 net_tx_action+0x877/0xa30 net/core/dev.c:5200
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554

The buggy address belongs to the object at ffff88807ecd4000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 18 bytes inside of
 freed 4096-byte region [ffff88807ecd4000, ffff88807ecd5000)

The buggy address belongs to the physical page:
page:ffffea0001fb3400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ecd0
head:ffffea0001fb3400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014c42140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5597, tgid 5597 (rm), ts 92394714458, free_ts 92344057905
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2190
 allocate_slab mm/slub.c:2354 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2407
 ___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
 __slab_alloc mm/slub.c:3625 [inline]
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc+0x2e3/0x4a0 mm/slub.c:3994
 kmalloc include/linux/slab.h:594 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771
 security_file_open+0x69/0x570 security/security.c:2933
 do_dentry_open+0x327/0x15a0 fs/open.c:943
 do_open fs/namei.c:3643 [inline]
 path_openat+0x2860/0x3240 fs/namei.c:3800
 do_filp_open+0x235/0x490 fs/namei.c:3827
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1433
 do_syscall_64+0xfb/0x240
page last free pid 5596 tgid 5594 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+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
 folio_put include/linux/mm.h:1494 [inline]
 free_large_kmalloc+0x105/0x1c0 mm/slub.c:4380
 kfree+0x1c1/0x380 mm/slub.c:4403
 skb_kfree_head net/core/skbuff.c:1096 [inline]
 skb_free_head net/core/skbuff.c:1108 [inline]
 skb_release_data+0x585/0x870 net/core/skbuff.c:1136
 skb_release_all net/core/skbuff.c:1202 [inline]
 __kfree_skb net/core/skbuff.c:1216 [inline]
 consume_skb+0xb3/0x160 net/core/skbuff.c:1432
 tbf_segment net/sched/sch_tbf.c:235 [inline]
 tbf_enqueue+0x738/0x8d0 net/sched/sch_tbf.c:249
 dev_qdisc_enqueue+0x4b/0x250 net/core/dev.c:3726
 __dev_xmit_skb net/core/dev.c:3817 [inline]
 __dev_queue_xmit+0xdfe/0x3b10 net/core/dev.c:4301
 packet_snd net/packet/af_packet.c:3083 [inline]
 packet_sendmsg+0x4932/0x63d0 net/packet/af_packet.c:3115
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Memory state around the buggy address:
 ffff88807ecd3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88807ecd3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807ecd4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88807ecd4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807ecd4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	2e 0f 1f 84 00 00 00 	cs nopl 0x0(%rax,%rax,1)
   7:	00 00
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	f3 0f 1e fa          	endbr64
  1d:	4c 8b 04 24          	mov    (%rsp),%r8
  21:	65 48 8b 14 25 80 ce 	mov    %gs:0x3ce80,%rdx
  28:	03 00
* 2a:	65 8b 05 60 da 6e 7e 	mov    %gs:0x7e6eda60(%rip),%eax        # 0x7e6eda91 <-- trapping instruction
  31:	a9 00 01 ff 00       	test   $0xff0100,%eax
  36:	74 10                	je     0x48
  38:	a9 00 01 00 00       	test   $0x100,%eax
  3d:	74 5b                	je     0x9a
  3f:	83                   	.byte 0x83