loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop2): 1 truncate cleaned up
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732
Read of size 18446744073709551572 at addr ffff888130788850 by task syz.2.2706/11167

CPU: 0 PID: 11167 Comm: syz.2.2706 Not tainted 6.1.128-syzkaller-00040-g6b227a1f7460 #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
 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189
 memmove+0x2d/0x70 mm/kasan/shadow.c:54
 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732
 ext4_xattr_block_set+0x99c/0x37f0 fs/ext4/xattr.c:1979
 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline]
 ext4_expand_extra_isize_ea+0x10eb/0x1c40 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x31a/0x420 fs/ext4/inode.c:5938
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline]
 __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x142/0x3f0 fs/ext4/namei.c:3370
 vfs_unlink+0x38c/0x630 fs/namei.c:4321
 do_unlinkat+0x483/0x920 fs/namei.c:4389
 __do_sys_unlink fs/namei.c:4437 [inline]
 __se_sys_unlink fs/namei.c:4435 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4435
 x64_sys_call+0x289/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88
 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: 0033:0x7fdaa6b8d169
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:00007fdaa7959038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fdaa6da5fa0 RCX: 00007fdaa6b8d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000000180
RBP: 00007fdaa6c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdaa6da5fa0 R15: 00007ffe304c3868
 </TASK>

Allocated by task 11167:
 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_track_caller+0xb3/0x1e0 mm/slab_common.c:958
 kmemdup+0x29/0x60 mm/util.c:134
 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline]
 ext4_xattr_block_set+0x80f/0x37f0 fs/ext4/xattr.c:1927
 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline]
 ext4_expand_extra_isize_ea+0x10eb/0x1c40 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x31a/0x420 fs/ext4/inode.c:5938
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline]
 __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x142/0x3f0 fs/ext4/namei.c:3370
 vfs_unlink+0x38c/0x630 fs/namei.c:4321
 do_unlinkat+0x483/0x920 fs/namei.c:4389
 __do_sys_unlink fs/namei.c:4437 [inline]
 __se_sys_unlink fs/namei.c:4435 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4435
 x64_sys_call+0x289/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88
 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 ffff888130788800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 80 bytes inside of
 1024-byte region [ffff888130788800, ffff888130788c00)

The buggy address belongs to the physical page:
page:ffffea0004c1e200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x130788
head:ffffea0004c1e200 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 290, tgid 290 (syz-executor), ts 22785934707, free_ts 0
 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
 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
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc+0xa3/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 __register_sysctl_table+0x141/0x1060 fs/proc/proc_sysctl.c:1341
 register_net_sysctl+0x246/0x260 net/sysctl_net.c:169
 neigh_sysctl_register+0x3ec/0x4d0 net/core/neighbour.c:3848
 devinet_sysctl_register+0xaa/0x1e0 net/ipv4/devinet.c:2649
 inetdev_init+0x2bf/0x4f0 net/ipv4/devinet.c:280
 inetdev_event+0x205/0x1110 net/ipv4/devinet.c:1547
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888130788700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888130788780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888130788800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff888130788880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888130788900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================