EXT4-fs (loop1): 1 truncate cleaned up
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback.
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732
Read of size 18446744073709551572 at addr ffff88802b678050 by task syz.1.2/4356

CPU: 0 PID: 4356 Comm: syz.1.2 Not tainted 6.1.129-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:427
 kasan_report+0x136/0x160 mm/kasan/report.c:531
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 memmove+0x25/0x60 mm/kasan/shadow.c:54
 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732
 ext4_xattr_block_set+0x97e/0x3820 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+0x302/0x400 fs/ext4/inode.c:5936
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline]
 __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370
 vfs_unlink+0x359/0x5f0 fs/namei.c:4322
 do_unlinkat+0x4a5/0x820 fs/namei.c:4390
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 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: 0033:0x7fde3a78d169
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:00007fde3b650038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fde3a9a5fa0 RCX: 00007fde3a78d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000000180
RBP: 00007fde3a80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fde3a9a5fa0 R15: 00007ffcf6e35468
 </TASK>

Allocated by task 4356:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc_node_track_caller+0xb1/0x220 mm/slab_common.c:956
 kmemdup+0x26/0x60 mm/util.c:129
 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline]
 ext4_xattr_block_set+0x7f4/0x3820 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+0x302/0x400 fs/ext4/inode.c:5936
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline]
 __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370
 vfs_unlink+0x359/0x5f0 fs/namei.c:4322
 do_unlinkat+0x4a5/0x820 fs/namei.c:4390
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 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 ffff88802b678000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 80 bytes inside of
 1024-byte region [ffff88802b678000, ffff88802b678400)

The buggy address belongs to the physical page:
page:ffffea0000ad9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b678
head:ffffea0000ad9e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001ef8e00 dead000000000002 ffff888017c41dc0
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 3940, tgid 3940 (dhcpcd), ts 34061259499, free_ts 34030291395
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5605
 alloc_slab_page+0x6a/0x150 mm/slub.c:1794
 allocate_slab mm/slub.c:1939 [inline]
 new_slab+0x84/0x2d0 mm/slub.c:1992
 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc+0xa1/0x230 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 load_elf_phdrs+0x15a/0x260 fs/binfmt_elf.c:481
 load_elf_binary+0x91e/0x2720 fs/binfmt_elf.c:961
 search_binary_handler fs/exec.c:1764 [inline]
 exec_binprm fs/exec.c:1805 [inline]
 bprm_execve+0x96a/0x18a0 fs/exec.c:1874
 do_execveat_common+0x580/0x720 fs/exec.c:1979
 do_execve fs/exec.c:2053 [inline]
 __do_sys_execve fs/exec.c:2129 [inline]
 __se_sys_execve fs/exec.c:2124 [inline]
 __x64_sys_execve+0x8e/0xa0 fs/exec.c:2124
 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
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
 put_cpu_partial+0x17b/0x250 mm/slub.c:2662
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
 proc_reg_open+0x1fd/0x520 fs/proc/inode.c:523
 do_dentry_open+0x7f9/0x10f0 fs/open.c:882
 do_open fs/namei.c:3626 [inline]
 path_openat+0x2644/0x2e60 fs/namei.c:3783
 do_filp_open+0x230/0x480 fs/namei.c:3810
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81

Memory state around the buggy address:
 ffff88802b677f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88802b677f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88802b678000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff88802b678080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802b678100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================