==================================================================
BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xb47/0xb50 fs/ext4/xattr.c:2917
Read of size 4 at addr ffff8881d7549000 by task syz-executor/544

CPU: 0 PID: 544 Comm: syz-executor Not tainted 5.4.290-syzkaller-05054-g986c38813dff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack+0x1e/0x20 lib/dump_stack.c:77
 dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
 print_address_description+0x8d/0x4c0 mm/kasan/report.c:384
 __kasan_report+0xef/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:131
 ext4_xattr_delete_inode+0xb47/0xb50 fs/ext4/xattr.c:2917
 ext4_evict_inode+0x11c0/0x1a30 fs/ext4/inode.c:318
 evict+0x465/0x880 fs/inode.c:610
 iput_final fs/inode.c:1652 [inline]
 iput+0x67d/0x810 fs/inode.c:1678
 d_delete_notify include/linux/fsnotify.h:230 [inline]
 vfs_rmdir+0x2b7/0x3e0 fs/namei.c:4040
 do_rmdir+0x23c/0x480 fs/namei.c:4088
 __do_sys_unlinkat fs/namei.c:4252 [inline]
 __se_sys_unlinkat fs/namei.c:4246 [inline]
 __x64_sys_unlinkat+0xb6/0xe0 fs/namei.c:4246
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fc9de7eb597
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 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:00007fff7c15def8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fc9de7eb597
RDX: 0000000000000200 RSI: 00007fff7c15f0a0 RDI: 00000000ffffff9c
RBP: 00007fc9de85965d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007fff7c15f0a0
R13: 00007fc9de85965d R14: 000000000000c290 R15: 0000000000000007

Allocated by task 462:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x162/0x200 mm/kasan/common.c:529
 kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:537
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xe2/0x270 mm/slub.c:2842
 kmem_cache_alloc_node include/linux/slab.h:427 [inline]
 __alloc_skb+0x9e/0x500 net/core/skbuff.c:198
 __napi_alloc_skb+0x30b/0x590 net/core/skbuff.c:516
 napi_alloc_skb include/linux/skbuff.h:2913 [inline]
 page_to_skb+0x40/0x890 drivers/net/virtio_net.c:412
 receive_mergeable drivers/net/virtio_net.c:1001 [inline]
 receive_buf+0xa15/0x42b0 drivers/net/virtio_net.c:1111
 virtnet_receive drivers/net/virtio_net.c:1403 [inline]
 virtnet_poll+0x4d8/0xed0 drivers/net/virtio_net.c:1512
 napi_poll net/core/dev.c:6386 [inline]
 net_rx_action+0x447/0xe50 net/core/dev.c:6454
 __do_softirq+0x236/0x660 kernel/softirq.c:292

Freed by task 462:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x1c3/0x280 mm/kasan/common.c:487
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:496
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook+0xb7/0x180 mm/slub.c:1494
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0x10c/0x2c0 mm/slub.c:3096
 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:654
 __kfree_skb net/core/skbuff.c:690 [inline]
 kfree_skb_partial+0x76/0x90 net/core/skbuff.c:5228
 tcp_rcv_established+0x10a7/0x18c0 net/ipv4/tcp_input.c:5797
 tcp_v4_do_rcv+0x4c1/0x7c0 net/ipv4/tcp_ipv4.c:1598
 tcp_v4_rcv+0x22da/0x2900 net/ipv4/tcp_ipv4.c:1990
 ip_protocol_deliver_rcu+0x2fa/0x650 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ip_local_deliver+0x2de/0x540 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:444 [inline]
 ip_sublist_rcv_finish net/ipv4/ip_input.c:541 [inline]
 ip_list_rcv_finish net/ipv4/ip_input.c:579 [inline]
 ip_sublist_rcv+0x9f4/0xa70 net/ipv4/ip_input.c:587
 ip_list_rcv+0x38d/0x3d0 net/ipv4/ip_input.c:621
 __netif_receive_skb_list_ptype net/core/dev.c:5034 [inline]
 __netif_receive_skb_list_core+0x571/0x760 net/core/dev.c:5082
 __netif_receive_skb_list net/core/dev.c:5134 [inline]
 netif_receive_skb_list_internal+0x7e9/0xa70 net/core/dev.c:5229
 gro_normal_list net/core/dev.c:5340 [inline]
 napi_complete_done+0x210/0x540 net/core/dev.c:6071
 virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
 virtnet_poll+0x872/0xed0 drivers/net/virtio_net.c:1516
 napi_poll net/core/dev.c:6386 [inline]
 net_rx_action+0x447/0xe50 net/core/dev.c:6454
 __do_softirq+0x236/0x660 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881d7549000
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 0 bytes inside of
 240-byte region [ffff8881d7549000, ffff8881d75490f0)
The buggy address belongs to the page:
page:ffffea00075d5240 refcount:1 mapcount:0 mapping:ffff8881f5e65400 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5e65400
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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x35e/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4893
 alloc_slab_page+0x3c/0x3b0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x93/0x420 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x29e/0x420 mm/slub.c:2667
 __slab_alloc+0x63/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x12c/0x270 mm/slub.c:2842
 skb_clone+0x1e9/0x380 net/core/skbuff.c:1467
 dev_queue_xmit_nit+0x198/0xa50 net/core/dev.c:1966
 xmit_one net/core/dev.c:3217 [inline]
 dev_hard_start_xmit+0x169/0x6f0 net/core/dev.c:3237
 sch_direct_xmit+0x24b/0x8b0 net/sched/sch_generic.c:336
 qdisc_restart net/sched/sch_generic.c:401 [inline]
 __qdisc_run+0x954/0x1370 net/sched/sch_generic.c:409
 qdisc_run+0x10a/0x300 include/net/pkt_sched.h:122
 __dev_xmit_skb net/core/dev.c:3432 [inline]
 __dev_queue_xmit+0x9dd/0x2400 net/core/dev.c:3787
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x2a9/0x3a0 mm/page_alloc.c:3085
 free_unref_page+0x7e/0xe0 mm/page_alloc.c:3134
 __put_single_page mm/swap.c:81 [inline]
 __put_page+0xad/0x120 mm/swap.c:115
 put_page include/linux/mm.h:1153 [inline]
 anon_pipe_buf_release+0x180/0x1f0 fs/pipe.c:150
 pipe_buf_release include/linux/pipe_fs_i.h:131 [inline]
 pipe_read+0x49c/0xc00 fs/pipe.c:338
 call_read_iter include/linux/fs.h:1985 [inline]
 new_sync_read fs/read_write.c:414 [inline]
 __vfs_read+0x47d/0x5c0 fs/read_write.c:427
 vfs_read+0x15a/0x370 fs/read_write.c:461
 ksys_read+0x140/0x240 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read fs/read_write.c:595 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:595
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881d7548f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d7548f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881d7549000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881d7549080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
 ffff8881d7549100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
==================================================================