EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs error (device loop5): ext4_xattr_ibody_get:591: inode #18: comm syz-executor.5: corrupted in-inode xattr
==================================================================
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 ffff8881e6f01084 by task syz-executor.5/3890

CPU: 1 PID: 3890 Comm: syz-executor.5 Not tainted 5.4.225-syzkaller-00018-g57b9129d0863 #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+0x258/0x1e70 fs/ext4/inode.c:1312
 ext4_da_write_begin+0x4a8/0xf80 fs/ext4/inode.c:3117
 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 3480:
 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_zalloc include/linux/slab.h:680 [inline]
 lsm_inode_alloc security/security.c:556 [inline]
 security_inode_alloc+0x24/0x130 security/security.c:928
 inode_init_always+0x5db/0x800 fs/inode.c:202
 alloc_inode fs/inode.c:238 [inline]
 new_inode_pseudo+0x8f/0x210 fs/inode.c:927
 __ns_get_path+0x152/0x450 fs/nsfs.c:77
 ns_get_path_cb fs/nsfs.c:116 [inline]
 ns_get_path+0x5f/0xa0 fs/nsfs.c:142
 proc_ns_get_link+0xf5/0x1f0 fs/proc/namespaces.c:55
 get_link fs/namei.c:1156 [inline]
 trailing_symlink+0x52c/0xba0 fs/namei.c:2338
 path_openat+0x2abd/0x3ea0 fs/namei.c:3616
 do_filp_open+0x208/0x450 fs/namei.c:3644
 do_sys_open+0x393/0x7e0 fs/open.c:1113
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 3470:
 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
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch+0x49e/0xa10 kernel/rcu/tree.c:2167
 rcu_core+0x4ba/0xca0 kernel/rcu/tree.c:2387
 __do_softirq+0x23e/0x643 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881e6f01058
 which belongs to the cache lsm_inode_cache of size 56
The buggy address is located 44 bytes inside of
 56-byte region [ffff8881e6f01058, ffff8881e6f01090)
The buggy address belongs to the page:
page:ffffea00079bc040 refcount:1 mapcount:0 mapping:ffff8881f5cef900 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea0007c27540 0000000900000009 ffff8881f5cef900
raw: 0000000000000000 00000000002e002e 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 0x112c40(GFP_NOFS|__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
 kmem_cache_zalloc include/linux/slab.h:680 [inline]
 lsm_inode_alloc security/security.c:556 [inline]
 security_inode_alloc+0x24/0x130 security/security.c:928
 inode_init_always+0x5db/0x800 fs/inode.c:202
 alloc_inode fs/inode.c:238 [inline]
 new_inode_pseudo+0x8f/0x210 fs/inode.c:927
 new_inode+0x25/0x1d0 fs/inode.c:956
 shmem_get_inode+0x113/0x630 mm/shmem.c:2252
 shmem_mknod+0x54/0x1a0 mm/shmem.c:2844
 lookup_open fs/namei.c:3309 [inline]
 do_last fs/namei.c:3401 [inline]
 path_openat+0x1ea2/0x3ea0 fs/namei.c:3614
 do_filp_open+0x208/0x450 fs/namei.c:3644
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:
 ffff8881e6f00f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881e6f01000: fb fb fb fb fb fb fb fc fc fc fc fb fb fb fb fb
>ffff8881e6f01080: fb fb fc fc fc fc 00 00 00 00 00 00 00 fc fc fc
                   ^
 ffff8881e6f01100: fc fb fb fb fb fb fb fb fc fc fc fc 00 00 00 00
 ffff8881e6f01180: 00 00 00 fc fc fc fc fb fb fb fb fb fb fb fc fc
==================================================================
EXT4-fs error (device loop5): ext4_read_block_bitmap_nowait:430: comm syz-executor.5: Invalid block bitmap block 0 in block_group 0