==================================================================
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 ffff8881ef5df084 by task syz-executor.5/1388

CPU: 0 PID: 1388 Comm: syz-executor.5 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 898:
 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 include/linux/skbuff.h:1060 [inline]
 tcp_collapse+0x770/0x13b0 net/ipv4/tcp_input.c:5016
 tcp_collapse_ofo_queue net/ipv4/tcp_input.c:5095 [inline]
 tcp_prune_queue+0x263/0xc00 net/ipv4/tcp_input.c:5183
 tcp_try_rmem_schedule net/ipv4/tcp_input.c:4575 [inline]
 tcp_data_queue_ofo net/ipv4/tcp_input.c:4596 [inline]
 tcp_data_queue+0xda1/0x8870 net/ipv4/tcp_input.c:4907
 tcp_rcv_established+0x88e/0x1900 net/ipv4/tcp_input.c:5776
 tcp_v4_do_rcv+0x39e/0x760 net/ipv4/tcp_ipv4.c:1584
 sk_backlog_rcv include/net/sock.h:982 [inline]
 __release_sock+0x165/0x3f0 net/core/sock.c:2454
 release_sock+0x5d/0x1a0 net/core/sock.c:2993
 sk_stream_wait_memory+0x6b2/0xd20 net/core/stream.c:145
 tcp_sendmsg_locked+0x12e5/0x3780 net/ipv4/tcp.c:1406
 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1446
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 __sys_sendto+0x4f1/0x6c0 net/socket.c:1942
 __do_sys_sendto net/socket.c:1954 [inline]
 __se_sys_sendto net/socket.c:1950 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:1950
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 9:
 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
 tcp_prune_ofo_queue+0x1a4/0x620 net/ipv4/tcp_input.c:5140
 tcp_prune_queue+0x7d4/0xc00 net/ipv4/tcp_input.c:5197
 tcp_try_rmem_schedule net/ipv4/tcp_input.c:4575 [inline]
 tcp_data_queue+0x4ae/0x8870 net/ipv4/tcp_input.c:4841
 tcp_rcv_established+0x88e/0x1900 net/ipv4/tcp_input.c:5776
 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_rcv_finish net/ipv4/ip_input.c:413 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0x18f/0x320 net/ipv4/ip_input.c:523
 __netif_receive_skb_one_core net/core/dev.c:4958 [inline]
 __netif_receive_skb+0x1c5/0x500 net/core/dev.c:5072
 process_backlog+0x335/0x670 net/core/dev.c:5907
 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 ffff8881ef5df000
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 132 bytes inside of
 240-byte region [ffff8881ef5df000, ffff8881ef5df0f0)
The buggy address belongs to the page:
page:ffffea0007bd77c0 refcount:1 mapcount:0 mapping:ffff8881f1ddd680 index:0xffff8881ef5df780
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea0007bd7508 ffffea0007bcbb88 ffff8881f1ddd680
raw: ffff8881ef5df780 00000000000c000a 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+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
 skb_clone+0x1b7/0x380 net/core/skbuff.c:1459
 dev_queue_xmit_nit+0x26c/0xa50 net/core/dev.c:1966
 xmit_one+0x80/0x4a0 net/core/dev.c:3205
 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
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
 __free_slab+0x22b/0x2e0 mm/slub.c:1774
 free_slab mm/slub.c:1789 [inline]
 discard_slab mm/slub.c:1795 [inline]
 unfreeze_partials+0x14f/0x180 mm/slub.c:2288
 put_cpu_partial+0xb5/0x150 mm/slub.c:2324
 __slab_free+0x2ac/0x370 mm/slub.c:2971
 qlist_free_all+0x4c/0xb0 mm/kasan/quarantine.c:167
 quarantine_reduce+0x174/0x190 mm/kasan/quarantine.c:260
 __kasan_kmalloc+0x43/0x1e0 mm/kasan/common.c:507
 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_trace+0xd8/0x240 mm/slub.c:2854
 kmem_cache_alloc_node_trace include/linux/slab.h:444 [inline]
 kmalloc_node include/linux/slab.h:594 [inline]
 kzalloc_node include/linux/slab.h:701 [inline]
 __get_vm_area_node+0x1ab/0x340 mm/vmalloc.c:2059
 __vmalloc_node_range+0xf0/0x730 mm/vmalloc.c:2494
 __vmalloc_node mm/vmalloc.c:2554 [inline]
 __vmalloc_node_flags mm/vmalloc.c:2568 [inline]
 vmalloc+0x70/0x80 mm/vmalloc.c:2593
 netlink_alloc_large_skb net/netlink/af_netlink.c:1189 [inline]
 netlink_sendmsg+0x61f/0xcc0 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 kernel_sendmsg+0xf5/0x130 net/socket.c:678
 sock_no_sendpage+0x143/0x1b0 net/core/sock.c:2778

Memory state around the buggy address:
 ffff8881ef5def80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881ef5df000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881ef5df080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
                   ^
 ffff8881ef5df100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8881ef5df180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs error (device loop5): ext4_read_block_bitmap_nowait:430: comm syz-executor.5: Invalid block bitmap block 0 in block_group 0