loop7: detected capacity change from 0 to 1024
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
==================================================================
BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x179e/0x1e20
Read of size 18446744073709550592 at addr ffff8881b9fc6400 by task syz.7.1425/11475

CPU: 1 UID: 0 PID: 11475 Comm: syz.7.1425 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xe8/0x150
 print_address_description+0x55/0x1e0
 print_report+0x58/0x70
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 __asan_memmove+0x29/0x70
 ext4_xattr_set_entry+0x179e/0x1e20
 ext4_xattr_block_set+0x878/0x2ad0
 ext4_xattr_set_handle+0xe34/0x14c0
 ext4_xattr_set+0x255/0x340
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x163/0x360
 filename_setxattr+0x296/0x630
 path_setxattrat+0x3eb/0x440
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c2519c799
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:00007f9c25f72028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f9c25415fa0 RCX: 00007f9c2519c799
RDX: 0000200000000000 RSI: 00002000000000c0 RDI: 0000200000000100
RBP: 00007f9c25232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c25416038 R14: 00007f9c25415fa0 R15: 00007ffd62fb7948
 </TASK>

Allocated by task 11475:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x4db/0x7b0
 kmemdup_noprof+0x2b/0x70
 ext4_xattr_block_set+0x787/0x2ad0
 ext4_xattr_set_handle+0xe34/0x14c0
 ext4_xattr_set+0x255/0x340
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x163/0x360
 filename_setxattr+0x296/0x630
 path_setxattrat+0x3eb/0x440
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881b9fc6000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes to the right of
 1024-byte region [ffff8881b9fc6000, ffff8881b9fc6400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b9fc0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff888100041dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888100041dc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 057ff00000000003 fffffffffffffe01 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5561, tgid 5561 (dhcpcd-run-hook), ts 37618991730, free_ts 35710806897
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x2418/0x24b0
 __alloc_frozen_pages_noprof+0x233/0x3d0
 allocate_slab+0x77/0x660
 refill_objects+0x331/0x3c0
 __pcs_replace_empty_main+0x2e6/0x730
 __kmalloc_noprof+0x474/0x760
 load_elf_binary+0x30f/0x2980
 bprm_execve+0x93d/0x1460
 do_execveat_common+0x50d/0x690
 __x64_sys_execve+0x97/0xc0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5260 tgid 5260 stack trace:
 __free_frozen_pages+0xbc7/0xd30
 __slab_free+0x263/0x2b0
 qlist_free_all+0x99/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x316/0x760
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path2_perm+0x2e7/0x760
 tomoyo_path_rename+0x14e/0x1b0
 security_path_rename+0x248/0x460
 filename_renameat2+0x4c1/0x9c0
 __se_sys_rename+0x55/0x2c0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8881b9fc6300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881b9fc6380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881b9fc6400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8881b9fc6480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881b9fc6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
