================================================================== BUG: KASAN: slab-out-of-bounds in le32_add_cpu include/linux/byteorder/generic.h:151 [inline] BUG: KASAN: slab-out-of-bounds in udf_add_fid_counter fs/udf/namei.c:-1 [inline] BUG: KASAN: slab-out-of-bounds in udf_unlink+0x5e3/0x6d0 fs/udf/namei.c:565 Read of size 4 at addr ffff88807def95c0 by task syz-executor/5879 CPU: 1 PID: 5879 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 le32_add_cpu include/linux/byteorder/generic.h:151 [inline] udf_add_fid_counter fs/udf/namei.c:-1 [inline] udf_unlink+0x5e3/0x6d0 fs/udf/namei.c:565 vfs_unlink+0x389/0x600 fs/namei.c:4333 do_unlinkat+0x328/0x570 fs/namei.c:4399 __do_sys_unlink fs/namei.c:4447 [inline] __se_sys_unlink fs/namei.c:4445 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4445 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fa32138ecf7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007fff342a90d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa32138ecf7 RDX: 00007fff342a9100 RSI: 00007fff342a9190 RDI: 00007fff342a9190 RBP: 00007fff342a9190 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff342aa280 R13: 00007fa321413d7d R14: 0000000000019374 R15: 00007fff342ac440 Allocated by task 5815: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] kobject_uevent_env+0x274/0x8c0 lib/kobject_uevent.c:539 rx_queue_add_kobject net/core/net-sysfs.c:1101 [inline] net_rx_queue_update_kobjects+0x313/0x580 net/core/net-sysfs.c:1141 register_queue_kobjects net/core/net-sysfs.c:1801 [inline] netdev_register_kobject+0x227/0x310 net/core/net-sysfs.c:2046 register_netdevice+0x128f/0x1ae0 net/core/dev.c:10280 __ip_tunnel_create+0x3b4/0x4c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2c3/0x770 net/ipv4/ip_tunnel.c:1104 vti_init_net+0x2f/0xf0 net/ipv4/ip_vti.c:504 ops_init+0x397/0x640 net/core/net_namespace.c:139 setup_net+0x3a5/0xa00 net/core/net_namespace.c:343 copy_net_ns+0x36d/0x5e0 net/core/net_namespace.c:520 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:228 ksys_unshare+0x4c0/0x890 kernel/fork.c:3439 __do_sys_unshare kernel/fork.c:3510 [inline] __se_sys_unshare kernel/fork.c:3508 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3508 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 5815: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] __kmem_cache_free+0xba/0x1f0 mm/slub.c:3843 kobject_uevent_env+0x363/0x8c0 lib/kobject_uevent.c:641 rx_queue_add_kobject net/core/net-sysfs.c:1101 [inline] net_rx_queue_update_kobjects+0x313/0x580 net/core/net-sysfs.c:1141 register_queue_kobjects net/core/net-sysfs.c:1801 [inline] netdev_register_kobject+0x227/0x310 net/core/net-sysfs.c:2046 register_netdevice+0x128f/0x1ae0 net/core/dev.c:10280 __ip_tunnel_create+0x3b4/0x4c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2c3/0x770 net/ipv4/ip_tunnel.c:1104 vti_init_net+0x2f/0xf0 net/ipv4/ip_vti.c:504 ops_init+0x397/0x640 net/core/net_namespace.c:139 setup_net+0x3a5/0xa00 net/core/net_namespace.c:343 copy_net_ns+0x36d/0x5e0 net/core/net_namespace.c:520 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:228 ksys_unshare+0x4c0/0x890 kernel/fork.c:3439 __do_sys_unshare kernel/fork.c:3510 [inline] __se_sys_unshare kernel/fork.c:3508 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3508 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88807def8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1472 bytes to the right of allocated 4096-byte region [ffff88807def8000, ffff88807def9000) The buggy address belongs to the physical page: page:ffffea0001f7be00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7def8 head:ffffea0001f7be00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888017842140 0000000000000000 0000000000000001 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5453, tgid 5453 (rm), ts 50982916616, free_ts 50922406719 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x1a2/0x260 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa4/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1c3/0x3c0 security/tomoyo/file.c:771 security_file_open+0x62/0xa0 security/security.c:2854 do_dentry_open+0x380/0x1500 fs/open.c:916 do_open fs/namei.c:3640 [inline] path_openat+0x274b/0x3190 fs/namei.c:3797 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x31d/0x410 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519 proc_reg_open+0x1f3/0x530 fs/proc/inode.c:523 do_dentry_open+0x8c6/0x1500 fs/open.c:929 do_open fs/namei.c:3640 [inline] path_openat+0x274b/0x3190 fs/namei.c:3797 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 Memory state around the buggy address: ffff88807def9480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807def9500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807def9580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807def9600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807def9680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================