loop5: detected capacity change from 0 to 1024
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
==================================================================
BUG: KASAN: slab-out-of-bounds in ext4_xattr_set_entry+0x179e/0x1e20
Read of size 25190 at addr ffff8880208f1c00 by task syz.5.1329/10470

CPU: 1 UID: 0 PID: 10470 Comm: syz.5.1329 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+0x179e/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_lsetxattr+0xbf/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79d618ebe9
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:00007f79d6fa5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f79d63c5fa0 RCX: 00007f79d618ebe9
RDX: 0000200000000100 RSI: 00002000000000c0 RDI: 0000200000000280
RBP: 00007f79d6211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f79d63c6038 R14: 00007f79d63c5fa0 R15: 00007ffebf5df208
 </TASK>

Allocated by task 10470:
 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_lsetxattr+0xbf/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880208f1800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes to the right of
 allocated 1024-byte region [ffff8880208f1800, ffff8880208f1c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880208f0800 pfn:0x208f0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a441dc0 0000000000000000 dead000000000001
raw: ffff8880208f0800 000000008010000f 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a441dc0 0000000000000000 dead000000000001
head: ffff8880208f0800 000000008010000f 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000823c01 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 1, tgid 1 (swapper/0), ts 6697581082, free_ts 0
 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
 sbitmap_queue_init_node+0x1dc/0x4d0
 blk_mq_init_tags+0x158/0x280
 blk_mq_alloc_map_and_rqs+0xbd/0x9f0
 blk_mq_alloc_set_map_and_rqs+0x1aa/0x880
 blk_mq_alloc_tag_set+0x847/0xfd0
 loop_add+0x3c9/0xad0
 loop_init+0xd9/0x170
 do_one_initcall+0x236/0x820
 do_initcall_level+0x104/0x190
 do_initcalls+0x59/0xa0
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8880208f1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880208f1b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880208f1c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8880208f1c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880208f1d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
