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+0x8e9/0x1e20
Read of size 18446744073709551588 at addr ffff88816c0b3840 by task syz.7.1845/10919

CPU: 1 UID: 0 PID: 10919 Comm: syz.7.1845 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+0xe34/0x14c0
 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_setxattr+0xbc/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5cbd9acb9
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:00007fe5ccb7e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fe5cc015fa0 RCX: 00007fe5cbd9acb9
RDX: 00002000000013c0 RSI: 0000200000000140 RDI: 0000200000000100
RBP: 00007fe5cbe08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe5cc016038 R14: 00007fe5cc015fa0 R15: 00007fffbf2d6cd8
 </TASK>

Allocated by task 10919:
 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+0xe34/0x14c0
 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_setxattr+0xbc/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88816c0b3800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 64 bytes inside of
 1024-byte region [ffff88816c0b3800, ffff88816c0b3c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c0b0
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 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888100041dc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000003 ffffea0005b02c01 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5842, tgid 5842 (syz-executor), ts 64181112596, free_ts 63842963883
 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_cache_noprof+0x40d/0x6e0
 batadv_hard_if_event+0xe7a/0x1700
 notifier_call_chain+0x19d/0x3a0
 register_netdevice+0x15f1/0x1aa0
 team_newlink+0x120/0x170
 rtnl_newlink_create+0x329/0xb70
 rtnl_newlink+0x1666/0x1be0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
page last free pid 5820 tgid 5820 stack trace:
 __free_frozen_pages+0xbb9/0xd10
 __folio_put+0x227/0x2c0
 skb_release_data+0x49a/0x7c0
 skb_attempt_defer_free+0x4ff/0x6f0
 tcp_recvmsg_locked+0x2373/0x35b0
 tcp_recvmsg+0x213/0x7f0
 inet_recvmsg+0x157/0x270
 sock_recvmsg+0x1a8/0x270
 sock_read_iter+0x251/0x320
 vfs_read+0x582/0xa70
 ksys_read+0x150/0x270
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88816c0b3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88816c0b3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88816c0b3800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                           ^
 ffff88816c0b3880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88816c0b3900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
