SELinux: Context : is not valid (left unmapped). ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x13ba/0x3940 fs/ext4/xattr.c:1752 Read of size 18446744073709551596 at addr ffff88811178b038 by task syz.0.4097/13086 CPU: 0 PID: 13086 Comm: syz.0.4097 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x13ba/0x3940 fs/ext4/xattr.c:1752 ext4_xattr_block_set+0x977/0x2d10 fs/ext4/xattr.c:2009 ext4_xattr_set_handle+0xba0/0x12b0 fs/ext4/xattr.c:2417 ext4_xattr_set+0x242/0x320 fs/ext4/xattr.c:2527 ext4_xattr_security_set+0x3c/0x50 fs/ext4/xattr_security.c:31 __vfs_setxattr+0x3e1/0x430 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 __vfs_setxattr_locked+0x212/0x230 fs/xattr.c:277 vfs_setxattr+0x167/0x2e0 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x36c/0x390 fs/xattr.c:611 __do_sys_fsetxattr fs/xattr.c:667 [inline] __se_sys_fsetxattr+0x168/0x1e0 fs/xattr.c:656 __x64_sys_fsetxattr+0xbf/0xd0 fs/xattr.c:656 x64_sys_call+0x19b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:191 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4b51a7feb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4b504dc028 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007f4b51cfafa0 RCX: 00007f4b51a7feb9 RDX: 0000200000000080 RSI: 0000200000000000 RDI: 0000000000000006 RBP: 00007f4b51aedc1f R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffdf R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4b51cfb038 R14: 00007f4b51cfafa0 R15: 00007ffcb77afe98 Allocated by task 13086: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc_track_caller+0x13c/0x2c0 mm/slub.c:4959 kmemdup+0x26/0x60 mm/util.c:132 ext4_xattr_block_set+0x886/0x2d10 fs/ext4/xattr.c:1957 ext4_xattr_set_handle+0xba0/0x12b0 fs/ext4/xattr.c:2417 ext4_xattr_set+0x242/0x320 fs/ext4/xattr.c:2527 ext4_xattr_security_set+0x3c/0x50 fs/ext4/xattr_security.c:31 __vfs_setxattr+0x3e1/0x430 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 __vfs_setxattr_locked+0x212/0x230 fs/xattr.c:277 vfs_setxattr+0x167/0x2e0 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x36c/0x390 fs/xattr.c:611 __do_sys_fsetxattr fs/xattr.c:667 [inline] __se_sys_fsetxattr+0x168/0x1e0 fs/xattr.c:656 __x64_sys_fsetxattr+0xbf/0xd0 fs/xattr.c:656 x64_sys_call+0x19b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:191 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0xb6/0x840 kernel/rcu/tree.c:3648 drop_sysctl_table+0x2f5/0x430 fs/proc/proc_sysctl.c:1687 unregister_sysctl_table+0x7a/0x120 fs/proc/proc_sysctl.c:1725 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3737 addrconf_sysctl_unregister net/ipv6/addrconf.c:7223 [inline] addrconf_ifdown+0x160d/0x18d0 net/ipv6/addrconf.c:3952 addrconf_notify+0x3bd/0xde0 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers net/core/dev.c:2083 [inline] unregister_netdevice_many+0x10a1/0x1aa0 net/core/dev.c:11150 ip6gre_exit_batch_net+0x5ad/0x600 net/ipv6/ip6_gre.c:1650 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x60a/0xae0 net/core/net_namespace.c:599 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0xb6/0x840 kernel/rcu/tree.c:3648 drop_sysctl_table+0x2f5/0x430 fs/proc/proc_sysctl.c:1687 unregister_sysctl_table+0x7a/0x120 fs/proc/proc_sysctl.c:1725 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3737 devinet_sysctl_unregister net/ipv4/devinet.c:2656 [inline] inetdev_destroy net/ipv4/devinet.c:327 [inline] inetdev_event+0x808/0x10a0 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers net/core/dev.c:2083 [inline] unregister_netdevice_many+0x10a1/0x1aa0 net/core/dev.c:11150 ip_tunnel_delete_nets+0x34b/0x3a0 net/ipv4/ip_tunnel.c:1123 ipgre_tap_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1711 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x60a/0xae0 net/core/net_namespace.c:599 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88811178b000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 56 bytes inside of 1024-byte region [ffff88811178b000, ffff88811178b400) The buggy address belongs to the page: page:ffffea000445e200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111788 head:ffffea000445e200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 raw: 0000000000000000 0000000080100010 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 101, ts 5499988774, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2d3a/0x2dc0 mm/page_alloc.c:4485 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4954 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x21a/0x740 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1186 [inline] netlink_sendmsg+0x611/0xb80 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg net/socket.c:2526 [inline] __x64_sys_sendmsg+0x206/0x2f0 net/socket.c:2526 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page_owner free stack trace missing Memory state around the buggy address: ffff88811178af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811178af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811178b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811178b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811178b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================