==================================================================
BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x373/0x510 fs/ext4/inline.c:61
Read of size 4 at addr ffff8881e08ee084 by task syz-executor.2/4252

CPU: 0 PID: 4252 Comm: syz-executor.2 Not tainted 5.4.219-syzkaller-00002-ga0eae55f26a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x630 mm/kasan/report.c:384
 __kasan_report+0xf6/0x130 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 get_max_inline_xattr_value_size+0x373/0x510 fs/ext4/inline.c:61
 ext4_get_max_inline_size+0x139/0x1f0 fs/ext4/inline.c:112
 ext4_try_to_write_inline_data+0xd9/0x1750 fs/ext4/inline.c:673
 ext4_write_begin+0x247/0x1d50 fs/ext4/inode.c:1312
 ext4_da_write_begin+0x4a8/0xf80 fs/ext4/inode.c:3110
 generic_perform_write+0x2f9/0x5a0 mm/filemap.c:3311
 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440
 ext4_file_write_iter+0x495/0x10e0 fs/ext4/file.c:270
 do_iter_readv_writev+0x529/0x740 fs/read_write.c:690
 do_iter_write+0x16f/0x570 fs/read_write.c:970
 iter_file_splice_write+0x887/0x10f0 fs/splice.c:746
 splice_direct_to_actor+0x4c4/0xb20 fs/splice.c:976
 do_splice_direct+0x2a0/0x3f0 fs/splice.c:1064
 do_sendfile+0x8f2/0xf10 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1ce/0x230 fs/read_write.c:1511
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Allocated by task 346:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
 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+0xd0/0x210 mm/slub.c:2842
 kmem_cache_alloc_node include/linux/slab.h:427 [inline]
 __alloc_skb+0x78/0x4d0 net/core/skbuff.c:198
 alloc_skb_fclone include/linux/skbuff.h:1110 [inline]
 sk_stream_alloc_skb+0x1ee/0xa80 net/ipv4/tcp.c:887
 tcp_sendmsg_locked+0xe3f/0x3780 net/ipv4/tcp.c:1296
 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1446
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 sock_write_iter+0x33f/0x460 net/socket.c:990
 call_write_iter include/linux/fs.h:1981 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5e3/0x780 fs/read_write.c:496
 vfs_write+0x210/0x4f0 fs/read_write.c:558
 ksys_write+0x198/0x2c0 fs/read_write.c:611
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 329:
 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+0x178/0x240 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
 __dev_kfree_skb_any+0x146/0x160 net/core/dev.c:2744
 free_old_xmit_skbs+0x12b/0x2b0 drivers/net/virtio_net.c:1446
 start_xmit+0x108/0x1490 drivers/net/virtio_net.c:1665
 __netdev_start_xmit include/linux/netdevice.h:4519 [inline]
 netdev_start_xmit include/linux/netdevice.h:4533 [inline]
 xmit_one+0xfa/0x4a0 net/core/dev.c:3209
 dev_hard_start_xmit+0xac/0x1b0 net/core/dev.c:3225
 sch_direct_xmit+0x28c/0xa20 net/sched/sch_generic.c:336
 qdisc_restart net/sched/sch_generic.c:401 [inline]
 __qdisc_run+0x245/0x420 net/sched/sch_generic.c:409
 qdisc_run include/net/pkt_sched.h:122 [inline]
 __dev_xmit_skb net/core/dev.c:3401 [inline]
 __dev_queue_xmit+0xd89/0x2a20 net/core/dev.c:3756
 neigh_hh_output include/net/neighbour.h:509 [inline]
 neigh_output include/net/neighbour.h:523 [inline]
 ip_finish_output2+0xb46/0xfb0 net/ipv4/ip_output.c:236
 NF_HOOK_COND include/linux/netfilter.h:297 [inline]
 ip_output+0x1a9/0x3a0 net/ipv4/ip_output.c:440
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0xf57/0x1810 net/ipv4/ip_output.c:541
 __tcp_transmit_skb+0x1d89/0x33b0 net/ipv4/tcp_output.c:1180
 tcp_transmit_skb net/ipv4/tcp_output.c:1196 [inline]
 tcp_write_xmit+0x1696/0x5e10 net/ipv4/tcp_output.c:2462
 __tcp_push_pending_frames+0x8f/0x300 net/ipv4/tcp_output.c:2643
 tcp_push_pending_frames include/net/tcp.h:1844 [inline]
 tcp_data_snd_check net/ipv4/tcp_input.c:5283 [inline]
 tcp_rcv_established+0xcc8/0x1900 net/ipv4/tcp_input.c:5693
 tcp_v4_do_rcv+0x39e/0x760 net/ipv4/tcp_ipv4.c:1584
 tcp_v4_rcv+0x222d/0x27c0 net/ipv4/tcp_ipv4.c:1966
 ip_protocol_deliver_rcu+0x2e1/0x670 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x2f4/0x5b0 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:450 [inline]
 ip_sublist_rcv_finish net/ipv4/ip_input.c:534 [inline]
 ip_list_rcv_finish net/ipv4/ip_input.c:572 [inline]
 ip_sublist_rcv+0x6c6/0x730 net/ipv4/ip_input.c:580
 ip_list_rcv+0x4a4/0x4f0 net/ipv4/ip_input.c:614
 __netif_receive_skb_list_ptype net/core/dev.c:5001 [inline]
 __netif_receive_skb_list_core+0x707/0x930 net/core/dev.c:5049
 __netif_receive_skb_list+0x4b1/0x580 net/core/dev.c:5101
 netif_receive_skb_list_internal+0x482/0x730 net/core/dev.c:5196
 gro_normal_list net/core/dev.c:5307 [inline]
 napi_complete_done+0x209/0x580 net/core/dev.c:6038
 virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
 virtnet_poll+0xb53/0x1200 drivers/net/virtio_net.c:1512
 napi_poll+0x195/0x670 net/core/dev.c:6353
 net_rx_action+0x37f/0x9c0 net/core/dev.c:6421
 __do_softirq+0x23e/0x643 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881e08ee000
 which belongs to the cache skbuff_fclone_cache of size 488
The buggy address is located 132 bytes inside of
 488-byte region [ffff8881e08ee000, ffff8881e08ee1e8)
The buggy address belongs to the page:
page:ffffea0007823b80 refcount:1 mapcount:0 mapping:ffff8881f1ddd900 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 ffffea0007a71c80 0000000400000004 ffff8881f1ddd900
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x194/0x380 mm/page_alloc.c:2171
 get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
 alloc_slab_page+0x39/0x3e0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x450 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x320/0x4a0 mm/slub.c:2667
 __slab_alloc+0x5a/0x90 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
 kmem_cache_alloc_node include/linux/slab.h:427 [inline]
 __alloc_skb+0x78/0x4d0 net/core/skbuff.c:198
 alloc_skb_fclone include/linux/skbuff.h:1110 [inline]
 tipc_buf_acquire net/tipc/msg.c:66 [inline]
 tipc_msg_create+0x46/0x5f0 net/tipc/msg.c:98
 tipc_group_proto_xmit+0x141/0x800 net/tipc/group.c:709
 tipc_group_cong+0x480/0x580 net/tipc/group.c:445
 tipc_send_group_anycast net/tipc/socket.c:998 [inline]
 __tipc_sendmsg+0x99e/0x3840 net/tipc/socket.c:1342
 tipc_sendmsg+0x51/0x70 net/tipc/socket.c:1305
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x5a6/0x8f0 net/socket.c:2287
 ___sys_sendmsg net/socket.c:2341 [inline]
 __sys_sendmsg+0x2b7/0x3a0 net/socket.c:2387
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+0x1a4/0x290 mm/page_alloc.c:1233
 free_unref_page_prepare mm/page_alloc.c:3085 [inline]
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4951 [inline]
 __free_pages+0x9c/0x250 mm/page_alloc.c:4959
 tlb_batch_list_free mm/mmu_gather.c:61 [inline]
 tlb_finish_mmu+0x124/0x200 mm/mmu_gather.c:275
 exit_mmap+0x2e8/0x540 mm/mmap.c:3188
 __mmput+0x34/0x240 kernel/fork.c:1090
 exit_mm kernel/exit.c:489 [inline]
 do_exit+0xc44/0x2d30 kernel/exit.c:799
 do_group_exit+0x136/0x300 kernel/exit.c:910
 __do_sys_exit_group kernel/exit.c:921 [inline]
 __se_sys_exit_group kernel/exit.c:919 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:919
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881e08edf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881e08ee000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881e08ee080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8881e08ee100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e08ee180: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
==================================================================
EXT4-fs error (device loop2): ext4_read_block_bitmap_nowait:430: comm syz-executor.2: Invalid block bitmap block 0 in block_group 0