loop8: detected capacity change from 0 to 1024
EXT4-fs (loop8): 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 ffff888112954040 by task syz.8.13357/7225

CPU: 0 UID: 0 PID: 7225 Comm: syz.8.13357 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_report+0xba/0x230
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 __asan_memmove+0x29/0x70
 ext4_xattr_set_entry+0x8e9/0x1e20
 ext4_xattr_block_set+0x878/0x2ad0
 ext4_xattr_set_handle+0x1286/0x14c0
 ext4_xattr_set+0x255/0x340
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16a/0x2e0
 filename_setxattr+0x281/0x630
 path_setxattrat+0x3f3/0x430
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3e7399acb9
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:00007f3e7492d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f3e73c15fa0 RCX: 00007f3e7399acb9
RDX: 0000200000000000 RSI: 0000200000000180 RDI: 00002000000001c0
RBP: 00007f3e73a08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000361 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3e73c16038 R14: 00007f3e73c15fa0 R15: 00007fff7b9bd288
 </TASK>

Allocated by task 7225:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x558/0x7f0
 kmemdup_noprof+0x2b/0x70
 ext4_xattr_block_set+0x787/0x2ad0
 ext4_xattr_set_handle+0x1286/0x14c0
 ext4_xattr_set+0x255/0x340
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16a/0x2e0
 filename_setxattr+0x281/0x630
 path_setxattrat+0x3f3/0x430
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888112954000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 64 bytes inside of
 1024-byte region [ffff888112954000, ffff888112954400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112950
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x17ff00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 017ff00000000040 ffff888100041dc0 ffffea0004477e00 dead000000000002
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 017ff00000000040 ffff888100041dc0 ffffea0004477e00 dead000000000002
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 017ff00000000003 ffffea00044a5401 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 5777, tgid 5777 (dhcpcd-run-hook), ts 62389898339, free_ts 62334236225
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x86/0x3a0
 ___slab_alloc+0xd82/0x1760
 __slab_alloc+0x65/0x100
 __kmalloc_noprof+0x46c/0x7e0
 load_elf_binary+0x30f/0x2980
 bprm_execve+0x93d/0x1410
 do_execveat_common+0x50f/0x690
 __x64_sys_execve+0x94/0xb0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5775 tgid 5775 stack trace:
 __free_frozen_pages+0xbb9/0xd10
 __put_partials+0x146/0x170
 __slab_free+0x294/0x320
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x370/0x6e0
 getname_flags+0xb7/0x540
 vfs_fstatat+0x43/0x170
 __x64_sys_newfstatat+0x151/0x200
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888112953f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888112953f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888112954000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                           ^
 ffff888112954080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888112954100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
