loop1: detected capacity change from 0 to 1024
EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8e9/0x1e20
Read of size 18446744073709551588 at addr ffff888106191840 by task syz.1.711/10999

CPU: 1 UID: 0 PID: 10999 Comm: syz.1.711 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 kasan_check_range+0x2b0/0x2c0
 __asan_memmove+0x29/0x70
 ext4_xattr_set_entry+0x8e9/0x1e20
 ext4_xattr_block_set+0x872/0x2ac0
 ext4_xattr_set_handle+0xdfb/0x1590
 ext4_xattr_set+0x230/0x320
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16b/0x2f0
 filename_setxattr+0x274/0x600
 path_setxattrat+0x364/0x3a0
 __x64_sys_setxattr+0xbc/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa59e38ebe9
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:00007fa59f16e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fa59e5c5fa0 RCX: 00007fa59e38ebe9
RDX: 00002000000013c0 RSI: 0000200000000140 RDI: 0000200000000100
RBP: 00007fa59e411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa59e5c6038 R14: 00007fa59e5c5fa0 R15: 00007fff27db68b8
 </TASK>

Allocated by task 10999:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x271/0x4e0
 kmemdup_noprof+0x2b/0x70
 ext4_xattr_block_set+0x781/0x2ac0
 ext4_xattr_set_handle+0xdfb/0x1590
 ext4_xattr_set+0x230/0x320
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16b/0x2f0
 filename_setxattr+0x274/0x600
 path_setxattrat+0x364/0x3a0
 __x64_sys_setxattr+0xbc/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888106191800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 64 bytes inside of
 1024-byte region [ffff888106191800, ffff888106191c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106190
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801a441dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801a441dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000003 ffffea0004186401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5843, tgid 5843 (syz-executor), ts 57529527844, free_ts 52205756506
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 allocate_slab+0x65/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_cache_node_noprof+0x29a/0x3d0
 alloc_shrinker_info+0x194/0x430
 mem_cgroup_css_online+0x2c/0x3d0
 online_css+0xbd/0x2e0
 cgroup_apply_control_enable+0x772/0xa80
 cgroup_mkdir+0xc40/0xe60
 kernfs_iop_mkdir+0x211/0x350
 vfs_mkdir+0x306/0x510
 do_mkdirat+0x247/0x590
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xfa/0x3b0
page last free pid 5838 tgid 5838 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 alloc_skb_with_frags+0xca/0x890
 sock_alloc_send_pskb+0x857/0x990
 unix_dgram_sendmsg+0x461/0x1850
 __sock_sendmsg+0x21c/0x270
 sock_write_iter+0x258/0x330
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250

Memory state around the buggy address:
 ffff888106191700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888106191780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888106191800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                           ^
 ffff888106191880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888106191900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
