EXT4-fs (loop7): mounted filesystem without journal. Quota mode: writeback.
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BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8ca/0x1f30 fs/ext4/xattr.c:1732
Read of size 18446744073709551572 at addr ffff88803130c850 by task syz.7.1769/10215

CPU: 1 PID: 10215 Comm: syz.7.1769 Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:395
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 memmove+0x25/0x60 mm/kasan/shadow.c:54
 ext4_xattr_set_entry+0x8ca/0x1f30 fs/ext4/xattr.c:1732
 ext4_xattr_block_set+0xa58/0x3920 fs/ext4/xattr.c:1979
 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline]
 ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5936
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline]
 __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370
 vfs_unlink+0x359/0x5f0 fs/namei.c:4322
 do_unlinkat+0x4a5/0x820 fs/namei.c:4390
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa00db7e719
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:00007fa00ea11038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa00dd35f80 RCX: 00007fa00db7e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 00007fa00dbf132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa00dd35f80 R15: 00007ffc90ba2d78
 </TASK>

Allocated by task 10215:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc_node_track_caller+0xb1/0x220 mm/slab_common.c:956
 kmemdup+0x26/0x60 mm/util.c:129
 ext4_xattr_block_set+0x884/0x3920 fs/ext4/xattr.c:1927
 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline]
 ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5936
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline]
 __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057
 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341
 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370
 vfs_unlink+0x359/0x5f0 fs/namei.c:4322
 do_unlinkat+0x4a5/0x820 fs/namei.c:4390
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff88803130c800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 80 bytes inside of
 1024-byte region [ffff88803130c800, ffff88803130cc00)

The buggy address belongs to the physical page:
page:ffffea0000c4c200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x31308
head:ffffea0000c4c200 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0000659800 dead000000000002 ffff888017c41dc0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8067, tgid 8066 (syz.6.995), ts 295677921675, free_ts 295661712031
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517
 prep_new_page mm/page_alloc.c:2524 [inline]
 get_page_from_freelist+0x322e/0x33b0 mm/page_alloc.c:4290
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5558
 alloc_slab_page+0x6a/0x150 mm/slub.c:1794
 allocate_slab mm/slub.c:1939 [inline]
 new_slab+0x84/0x2d0 mm/slub.c:1992
 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc_node_track_caller+0xa0/0x220 mm/slab_common.c:956
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x135/0x670 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1271 [inline]
 alloc_skb_with_frags+0xa4/0x740 net/core/skbuff.c:6162
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2747
 sock_alloc_send_skb include/net/sock.h:1920 [inline]
 __ip_append_data+0x2ad9/0x4080 net/ipv4/ip_output.c:1120
 ip_append_data+0x12c/0x1a0 net/ipv4/ip_output.c:1343
 icmp_push_reply+0x97/0x410 net/ipv4/icmp.c:378
 __icmp_send+0xf9e/0x15a0 net/ipv4/icmp.c:780
 icmp_send include/net/icmp.h:43 [inline]
 __udp4_lib_rcv+0x16f8/0x24d0 net/ipv4/udp.c:2475
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1444 [inline]
 free_pcp_prepare mm/page_alloc.c:1494 [inline]
 free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3369
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3464
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
 put_cpu_partial+0x17b/0x250 mm/slub.c:2662
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
 __alloc_skb+0xde/0x670 net/core/skbuff.c:505
 alloc_skb include/linux/skbuff.h:1271 [inline]
 sock_wmalloc+0xa3/0x120 net/core/sock.c:2596
 pppol2tp_sendmsg+0x17d/0x600 net/l2tp/l2tp_ppp.c:291
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_sendmsg net/socket.c:753 [inline]
 kernel_sendmsg+0x205/0x2e0 net/socket.c:777
 sock_no_sendpage+0x162/0x1e0 net/core/sock.c:3249
 kernel_sendpage+0x26a/0x640 net/socket.c:3608
 sock_sendpage+0x7f/0xb0 net/socket.c:1081

Memory state around the buggy address:
 ffff88803130c700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803130c780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803130c800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff88803130c880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803130c900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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