EXT4-fs (loop7): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop7): 1 truncate cleaned up
EXT4-fs (loop7): mounted filesystem without journal. Quota mode: none.
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 fs/ext4/xattr.c:1730
Read of size 18446744073709551572 at addr ffff88813161b050 by task syz.7.134/873

CPU: 1 PID: 873 Comm: syz.7.134 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 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+0x979/0x21d0 fs/ext4/xattr.c:1730
 ext4_xattr_block_set+0xad3/0x3260 fs/ext4/xattr.c:1977
 ext4_xattr_move_to_block fs/ext4/xattr.c:2611 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2686 [inline]
 ext4_expand_extra_isize_ea+0x124a/0x1ea0 fs/ext4/xattr.c:2774
 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5986
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6029 [inline]
 __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6107
 ext4_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6139
 __mark_inode_dirty+0x203/0x9d0 fs/fs-writeback.c:2455
 mark_inode_dirty include/linux/fs.h:2563 [inline]
 ext4_setattr+0xa65/0x1a60 fs/ext4/inode.c:5663
 notify_change+0xcc3/0xf80 fs/attr.c:499
 chmod_common+0x223/0x3c0 fs/open.c:607
 do_fchmodat+0xd4/0x1a0 fs/open.c:646
 __do_sys_chmod fs/open.c:664 [inline]
 __se_sys_chmod fs/open.c:662 [inline]
 __x64_sys_chmod+0x60/0x70 fs/open.c:662
 x64_sys_call+0x760/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:91
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f21b659c819
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:00007f21b7475028 EFLAGS: 00000246 ORIG_RAX: 000000000000005a
RAX: ffffffffffffffda RBX: 00007f21b6815fa0 RCX: 00007f21b659c819
RDX: 0000000000000000 RSI: 0000000000000122 RDI: 0000200000000380
RBP: 00007f21b6632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21b6816038 R14: 00007f21b6815fa0 R15: 00007ffdd9a52138
 </TASK>

Allocated by task 873:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node_track_caller+0xb1/0x1e0 mm/slab_common.c:958
 kmemdup+0x2b/0x60 mm/util.c:134
 kmemdup include/linux/fortify-string.h:585 [inline]
 ext4_xattr_block_set+0x9d5/0x3260 fs/ext4/xattr.c:1925
 ext4_xattr_move_to_block fs/ext4/xattr.c:2611 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2686 [inline]
 ext4_expand_extra_isize_ea+0x124a/0x1ea0 fs/ext4/xattr.c:2774
 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5986
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6029 [inline]
 __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6107
 ext4_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6139
 __mark_inode_dirty+0x203/0x9d0 fs/fs-writeback.c:2455
 mark_inode_dirty include/linux/fs.h:2563 [inline]
 ext4_setattr+0xa65/0x1a60 fs/ext4/inode.c:5663
 notify_change+0xcc3/0xf80 fs/attr.c:499
 chmod_common+0x223/0x3c0 fs/open.c:607
 do_fchmodat+0xd4/0x1a0 fs/open.c:646
 __do_sys_chmod fs/open.c:664 [inline]
 __se_sys_chmod fs/open.c:662 [inline]
 __x64_sys_chmod+0x60/0x70 fs/open.c:662
 x64_sys_call+0x760/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:91
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88813161b000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 80 bytes inside of
 1024-byte region [ffff88813161b000, ffff88813161b400)

The buggy address belongs to the physical page:
page:ffffea0004c58600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88813161e000 pfn:0x131618
head:ffffea0004c58600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100043080
raw: ffff88813161e000 000000008010000d 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 285, tgid 285 (syz-executor), ts 22645118799, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2670
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2677
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4583
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5924
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa0/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:449 [inline]
 __alloc_skb+0x236/0x4b0 net/core/skbuff.c:518
 alloc_skb include/linux/skbuff.h:1322 [inline]
 alloc_uevent_skb+0x85/0x240 lib/kobject_uevent.c:290
 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline]
 kobject_uevent_net_broadcast+0x1b4/0x5b0 lib/kobject_uevent.c:412
 kobject_uevent_env+0x54f/0x730 lib/kobject_uevent.c:608
 kobject_uevent+0x1d/0x30 lib/kobject_uevent.c:657
 netdev_queue_add_kobject net/core/net-sysfs.c:1671 [inline]
 netdev_queue_update_kobjects+0x22c/0x470 net/core/net-sysfs.c:1712
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88813161af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88813161af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88813161b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff88813161b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88813161b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================