==================================================================
BUG: KASAN: use-after-free in dev_map_enqueue+0x40/0x340 kernel/bpf/devmap.c:532
Read of size 8 at addr ffff888116295e80 by task syz.6.10484/31285

CPU: 1 PID: 31285 Comm: syz.6.10484 Not tainted 6.1.129-syzkaller-00005-g19a0fb1d3513 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 dev_map_enqueue+0x40/0x340 kernel/bpf/devmap.c:532
 __xdp_do_redirect_frame net/core/filter.c:4327 [inline]
 xdp_do_redirect_frame+0x2b5/0x800 net/core/filter.c:4389
 xdp_test_run_batch net/bpf/test_run.c:314 [inline]
 bpf_test_run_xdp_live+0xc30/0x1f70 net/bpf/test_run.c:362
 bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1393
 bpf_prog_test_run+0x3b0/0x630 kernel/bpf/syscall.c:3670
 __sys_bpf+0x59f/0x7f0 kernel/bpf/syscall.c:5025
 __do_sys_bpf kernel/bpf/syscall.c:5111 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5109
 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc52838d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc5291fa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc5285a5fa0 RCX: 00007fc52838d169
RDX: 0000000000000050 RSI: 00002000000000c0 RDI: 000000000000000a
RBP: 00007fc52840e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc5285a5fa0 R15: 00007ffef89d64b8
 </TASK>

Allocated by task 28665:
 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_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:589 [inline]
 kvmalloc_node+0x221/0x640 mm/util.c:592
 kvmalloc include/linux/slab.h:716 [inline]
 alloc_fdtable+0x163/0x2a0 fs/file.c:137
 dup_fd+0x6a6/0x950 fs/file.c:336
 copy_files+0x76/0xe0 kernel/fork.c:1737
 copy_process+0x11e9/0x3530 kernel/fork.c:2357
 kernel_clone+0x229/0x890 kernel/fork.c:2785
 __do_sys_clone kernel/fork.c:2928 [inline]
 __se_sys_clone kernel/fork.c:2912 [inline]
 __x64_sys_clone+0x231/0x280 kernel/fork.c:2912
 x64_sys_call+0x1b0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 30676:
 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:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 kvfree+0x35/0x40 mm/util.c:639
 __free_fdtable fs/file.c:37 [inline]
 put_files_struct+0x2a8/0x320 fs/file.c:432
 exit_files+0x80/0xa0 fs/file.c:445
 do_exit+0xb99/0x2b80 kernel/exit.c:872
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027
 get_signal+0x169d/0x1820 kernel/signal.c:2889
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 __call_rcu_common kernel/rcu/tree.c:2807 [inline]
 call_rcu+0xdc/0x10f0 kernel/rcu/tree.c:2926
 release_probes kernel/tracepoint.c:164 [inline]
 tracepoint_remove_func kernel/tracepoint.c:458 [inline]
 tracepoint_probe_unregister+0x82b/0x900 kernel/tracepoint.c:551
 bpf_probe_unregister+0x61/0x70 kernel/trace/bpf_trace.c:2358
 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:3175
 bpf_link_free+0x129/0x3f0 kernel/bpf/syscall.c:2744
 bpf_link_put kernel/bpf/syscall.c:2770 [inline]
 bpf_link_release+0x170/0x180 kernel/bpf/syscall.c:2779
 __fput+0x1e5/0x870 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x24d/0x2e0 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xbd0/0x2b80 kernel/exit.c:877
 __do_sys_exit kernel/exit.c:994 [inline]
 __se_sys_exit kernel/exit.c:992 [inline]
 __ia32_sys_exit+0x0/0x40 kernel/exit.c:992
 x64_sys_call+0x1cc/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Second to last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1368
 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
 queue_work_on+0x105/0x170 kernel/workqueue.c:1555
 queue_work include/linux/workqueue.h:510 [inline]
 schedule_work include/linux/workqueue.h:571 [inline]
 nf_nat_masq_schedule+0x4bc/0x600 net/netfilter/nf_nat_masquerade.c:130
 masq_device_event+0xa0/0xd0 net/netfilter/nf_nat_masquerade.c:162
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1978 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2016 [inline]
 call_netdevice_notifiers net/core/dev.c:2030 [inline]
 dev_close_many+0x37c/0x530 net/core/dev.c:1578
 vlan_device_event+0x14c6/0x1c30 net/8021q/vlan.c:449
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:455
 __dev_notify_flags+0x304/0x610 net/core/dev.c:-1
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8687
 dev_ifsioc+0x177/0x1150 net/core/dev_ioctl.c:327
 dev_ioctl+0x543/0xe60 net/core/dev_ioctl.c:588
 sock_do_ioctl+0x26b/0x450 net/socket.c:1208
 sock_ioctl+0x455/0x740 net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x114/0x190 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888116295e80
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 96-byte region [ffff888116295e80, ffff888116295ee0)

The buggy address belongs to the physical page:
page:ffffea000458a540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116295
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004ee9d80 dead000000000002 ffff888100042900
raw: 0000000000000000 0000000000200020 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 105, tgid 105 (udevd), ts 5269790057, free_ts 5269724118
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2637
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2644
 get_page_from_freelist+0x3a98/0x3b10 mm/page_alloc.c:4539
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5837
 alloc_slab_page+0x6c/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 kernfs_get_open_node fs/kernfs/file.c:574 [inline]
 kernfs_fop_open+0x70e/0xb10 fs/kernfs/file.c:742
 do_dentry_open+0x891/0x1250 fs/open.c:884
 vfs_open+0x73/0x80 fs/open.c:1015
 do_open fs/namei.c:3625 [inline]
 path_openat+0x2532/0x2d60 fs/namei.c:3782
 do_filp_open+0x230/0x480 fs/namei.c:3809
 do_sys_openat2+0x151/0x870 fs/open.c:1341
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1545 [inline]
 free_pcp_prepare mm/page_alloc.c:1619 [inline]
 free_unref_page_prepare+0x9f1/0xa00 mm/page_alloc.c:3581
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3677
 free_the_page mm/page_alloc.c:830 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5926
 free_pages+0x7c/0x90 mm/page_alloc.c:5937
 selinux_genfs_get_sid+0x24d/0x2a0 security/selinux/hooks.c:1303
 inode_doinit_with_dentry+0x8d2/0x1070 security/selinux/hooks.c:1498
 selinux_d_instantiate+0x27/0x40 security/selinux/hooks.c:6390
 security_d_instantiate+0x9f/0x100 security/security.c:2096
 d_splice_alias+0x6d/0x390 fs/dcache.c:3153
 kernfs_iop_lookup+0x29e/0x2f0 fs/kernfs/dir.c:1204
 __lookup_slow+0x2b9/0x3e0 fs/namei.c:1689
 lookup_slow+0x5a/0x80 fs/namei.c:1706
 walk_component+0x2e7/0x410 fs/namei.c:1997
 lookup_last fs/namei.c:2454 [inline]
 path_lookupat+0x16d/0x450 fs/namei.c:2478
 filename_lookup+0x251/0x600 fs/namei.c:2507
 vfs_statx+0x107/0x4b0 fs/stat.c:229

Memory state around the buggy address:
 ffff888116295d80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888116295e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888116295e80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff888116295f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888116295f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
general protection fault, probably for non-canonical address 0xdffffc0000000044: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000220-0x0000000000000227]
CPU: 1 PID: 31285 Comm: syz.6.10484 Tainted: G    B              6.1.129-syzkaller-00005-g19a0fb1d3513 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:481 [inline]
RIP: 0010:dev_map_enqueue+0x91/0x340 kernel/bpf/devmap.c:534
Code: d0 00 00 00 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 5f a0 25 00 bb 20 02 00 00 49 03 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 40 a0 25 00 48 83 3b 00 0f 84 eb
RSP: 0018:ffffc900102675f8 EFLAGS: 00010206
RAX: 0000000000000044 RBX: 0000000000000220 RCX: ffffffff8197a4e1
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888133d74cd0
RBP: ffffc90010267638 R08: ffffffff8144b443 R09: fffffbfff0f6e8fd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888133d74cd0 R14: ffff888133d74c00 R15: ffff88812eb40070
FS:  00007fc5291fa6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000013b189000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __xdp_do_redirect_frame net/core/filter.c:4327 [inline]
 xdp_do_redirect_frame+0x2b5/0x800 net/core/filter.c:4389
 xdp_test_run_batch net/bpf/test_run.c:314 [inline]
 bpf_test_run_xdp_live+0xc30/0x1f70 net/bpf/test_run.c:362
 bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1393
 bpf_prog_test_run+0x3b0/0x630 kernel/bpf/syscall.c:3670
 __sys_bpf+0x59f/0x7f0 kernel/bpf/syscall.c:5025
 __do_sys_bpf kernel/bpf/syscall.c:5111 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5109
 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc52838d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc5291fa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc5285a5fa0 RCX: 00007fc52838d169
RDX: 0000000000000050 RSI: 00002000000000c0 RDI: 000000000000000a
RBP: 00007fc52840e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc5285a5fa0 R15: 00007ffef89d64b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:481 [inline]
RIP: 0010:dev_map_enqueue+0x91/0x340 kernel/bpf/devmap.c:534
Code: d0 00 00 00 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 5f a0 25 00 bb 20 02 00 00 49 03 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 40 a0 25 00 48 83 3b 00 0f 84 eb
RSP: 0018:ffffc900102675f8 EFLAGS: 00010206
RAX: 0000000000000044 RBX: 0000000000000220 RCX: ffffffff8197a4e1
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888133d74cd0
RBP: ffffc90010267638 R08: ffffffff8144b443 R09: fffffbfff0f6e8fd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888133d74cd0 R14: ffff888133d74c00 R15: ffff88812eb40070
FS:  00007fc5291fa6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000013b189000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	d0 00                	rolb   (%rax)
   2:	00 00                	add    %al,(%rax)
   4:	4c 89 e8             	mov    %r13,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  10:	74 08                	je     0x1a
  12:	4c 89 ef             	mov    %r13,%rdi
  15:	e8 5f a0 25 00       	call   0x25a079
  1a:	bb 20 02 00 00       	mov    $0x220,%ebx
  1f:	49 03 5d 00          	add    0x0(%r13),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 40 a0 25 00       	call   0x25a079
  39:	48 83 3b 00          	cmpq   $0x0,(%rbx)
  3d:	0f                   	.byte 0xf
  3e:	84 eb                	test   %ch,%bl