==================================================================
BUG: KASAN: use-after-free in ext4_xattr_rehash fs/ext4/xattr.c:3142 [inline]
BUG: KASAN: use-after-free in ext4_xattr_set_entry+0xde3/0x36c0 fs/ext4/xattr.c:1824
Read of size 4 at addr ffff888108790048 by task syz-executor113/282

CPU: 0 PID: 282 Comm: syz-executor113 Not tainted 5.10.237-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_xattr_rehash fs/ext4/xattr.c:3142 [inline]
 ext4_xattr_set_entry+0xde3/0x36c0 fs/ext4/xattr.c:1824
 ext4_xattr_block_set+0x4d6/0x2a50 fs/ext4/xattr.c:1927
 ext4_xattr_set_handle+0xbd5/0x12a0 fs/ext4/xattr.c:2412
 ext4_xattr_set+0x1ec/0x320 fs/ext4/xattr.c:2513
 ext4_xattr_trusted_set+0x3b/0x50 fs/ext4/xattr_trusted.c:37
 __vfs_setxattr+0x42a/0x480 fs/xattr.c:177
 __vfs_setxattr_noperm+0x11e/0x4e0 fs/xattr.c:208
 __vfs_setxattr_locked+0x203/0x220 fs/xattr.c:266
 vfs_setxattr+0x8d/0x1c0 fs/xattr.c:283
 setxattr+0x1a9/0x370 fs/xattr.c:548
 path_setxattr+0x110/0x210 fs/xattr.c:567
 __do_sys_lsetxattr fs/xattr.c:589 [inline]
 __se_sys_lsetxattr fs/xattr.c:585 [inline]
 __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:585
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f0901fc7499
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd56945d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 0072657070752e79 RCX: 00007f0901fc7499
RDX: 0000200000000040 RSI: 00002000000000c0 RDI: 0000200000000100
RBP: 00007ffd56945e68 R08: 0000000000000000 R09: 00007f0902010160
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd56946108 R14: 0000000000000001 R15: 0000000000000001

Allocated by task 0:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
 kmem_cache_alloc_node include/linux/slab.h:423 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 __napi_alloc_skb+0x158/0x2e0 net/core/skbuff.c:522
 napi_alloc_skb include/linux/skbuff.h:2952 [inline]
 page_to_skb+0x40/0x8b0 drivers/net/virtio_net.c:412
 receive_mergeable drivers/net/virtio_net.c:1019 [inline]
 receive_buf+0xba1/0x4590 drivers/net/virtio_net.c:1129
 virtnet_receive drivers/net/virtio_net.c:1421 [inline]
 virtnet_poll+0x4f2/0xef0 drivers/net/virtio_net.c:1530
 napi_poll net/core/dev.c:6874 [inline]
 net_rx_action+0x432/0xdd0 net/core/dev.c:6944
 __do_softirq+0x255/0x563 kernel/softirq.c:309

Freed by task 270:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0x100/0x2d0 mm/slub.c:3219
 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
 __kfree_skb+0x58/0x70 net/core/skbuff.c:695
 sk_eat_skb include/net/sock.h:2653 [inline]
 tcp_recvmsg+0x1515/0x2e10 net/ipv4/tcp.c:2345
 inet_recvmsg+0x134/0x470 net/ipv4/af_inet.c:864
 sock_recvmsg_nosec net/socket.c:905 [inline]
 sock_recvmsg net/socket.c:923 [inline]
 sock_read_iter+0x2a2/0x340 net/socket.c:996
 call_read_iter include/linux/fs.h:2052 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x874/0xa10 fs/read_write.c:496
 ksys_read+0x140/0x240 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff888108790000
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 72 bytes inside of
 248-byte region [ffff888108790000, ffff8881087900f8)
The buggy address belongs to the page:
page:ffffea000421e400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108790
flags: 0x4000000000000200(slab)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888107d94780
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 0, ts 20824981649, free_ts 20823670797
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5349
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2960
 kmem_cache_alloc_node include/linux/slab.h:423 [inline]
 __alloc_skb+0x9e/0x520 net/core/skbuff.c:200
 __napi_alloc_skb+0x158/0x2e0 net/core/skbuff.c:522
 napi_alloc_skb include/linux/skbuff.h:2952 [inline]
 page_to_skb+0x40/0x8b0 drivers/net/virtio_net.c:412
 receive_mergeable drivers/net/virtio_net.c:1019 [inline]
 receive_buf+0xba1/0x4590 drivers/net/virtio_net.c:1129
 virtnet_receive drivers/net/virtio_net.c:1421 [inline]
 virtnet_poll+0x4f2/0xef0 drivers/net/virtio_net.c:1530
 napi_poll net/core/dev.c:6874 [inline]
 net_rx_action+0x432/0xdd0 net/core/dev.c:6944
 __do_softirq+0x255/0x563 kernel/softirq.c:309
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page+0x7f/0x180 mm/page_alloc.c:3391
 __put_single_page mm/swap.c:104 [inline]
 __put_page+0xae/0xe0 mm/swap.c:135
 put_page include/linux/mm.h:1257 [inline]
 anon_pipe_buf_release+0x189/0x220 fs/pipe.c:137
 pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
 pipe_read+0x53d/0xfe0 fs/pipe.c:323
 call_read_iter include/linux/fs.h:2052 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x874/0xa10 fs/read_write.c:496
 ksys_read+0x140/0x240 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Memory state around the buggy address:
 ffff88810878ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88810878ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888108790000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff888108790080: fb fb fb fb fb f