loop0: detected capacity change from 0 to 1024 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 1024 to 1023 EXT4-fs error (device loop0): ext4_update_inline_data:362: inode #15: comm syz.0.0: missing inline data xattr EXT4-fs error (device loop0): ext4_readdir:265: inode #2: block 16: comm syz.0.0: path /0/file1: bad entry in directory: inode out of bounds - offset=0, inode=11778, rec_len=512, size=1024 fake=0 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x92b/0x1ed0 fs/ext4/xattr.c:1763 Read of size 18446744073709551600 at addr ffff888053c202b8 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x92b/0x1ed0 fs/ext4/xattr.c:1763 ext4_xattr_ibody_set+0x262/0x710 fs/ext4/xattr.c:2275 ext4_destroy_inline_data_nolock+0x23a/0x5f0 fs/ext4/inline.c:472 ext4_convert_inline_data_nolock+0x208/0x980 fs/ext4/inline.c:1123 ext4_convert_inline_data+0x484/0x5c0 fs/ext4/inline.c:1994 ext4_setattr+0xef1/0x1d70 fs/ext4/inode.c:6032 notify_change+0xbba/0xea0 fs/attr.c:556 do_truncate+0x1c2/0x250 fs/open.c:68 do_ftruncate+0x4d4/0x580 fs/open.c:194 ksys_ftruncate fs/open.c:206 [inline] __do_sys_ftruncate fs/open.c:211 [inline] __se_sys_ftruncate fs/open.c:209 [inline] __x64_sys_ftruncate+0x8f/0xe0 fs/open.c:209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1d2519e019 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1d2606afe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007f1d25425fa0 RCX: 00007f1d2519e019 RDX: 0000000000000000 RSI: 0000000000010001 RDI: 0000000000000009 RBP: 00007f1d2523500c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1d25426038 R14: 00007f1d25425fa0 R15: 00007fff17abdba8 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88801d02d940 index:0x2 pfn:0x53c20 memcg:ffff8880349a1b00 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff58000004234(referenced|dirty|lru|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff58000004234 ffff888030450a80 ffff888030450a80 ffff88801d02d940 raw: 0000000000000002 ffff888013006380 00000002ffffffff ffff8880349a1b00 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_MOVABLE|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL), pid 5325, tgid 5324 (syz.0.0), ts 95602124648, free_ts 95586534309 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304 alloc_pages_mpol+0x212/0x380 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0xac/0x2a0 mm/mempolicy.c:2581 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2591 filemap_alloc_folio_noprof+0x111/0x470 mm/filemap.c:1013 __filemap_get_folio_mpol+0x402/0x1000 mm/filemap.c:2012 __filemap_get_folio include/linux/pagemap.h:761 [inline] grow_dev_folio fs/buffer.c:960 [inline] grow_buffers fs/buffer.c:1026 [inline] __getblk_slow fs/buffer.c:1044 [inline] bdev_getblk+0x1f4/0x6e0 fs/buffer.c:1439 __getblk include/linux/buffer_head.h:382 [inline] sb_getblk include/linux/buffer_head.h:388 [inline] __ext4_get_inode_loc+0x56c/0xf40 fs/ext4/inode.c:4891 ext4_get_inode_loc+0x81/0xf0 fs/ext4/inode.c:5019 ext4_xattr_ibody_get+0x113/0x4b0 fs/ext4/xattr.c:648 ext4_xattr_get+0x121/0x690 fs/ext4/xattr.c:709 __vfs_getxattr+0x412/0x440 fs/xattr.c:446 cap_inode_need_killpriv+0x45/0x60 security/commoncap.c:331 security_inode_need_killpriv+0x85/0x240 security/security.c:2186 page last free pid 5325 tgid 5324 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] free_unref_folios+0xd84/0x14a0 mm/page_alloc.c:3011 folios_put_refs+0x9e9/0xb30 mm/swap.c:1057 folio_batch_release include/linux/folio_batch.h:101 [inline] shmem_undo_range+0x4e6/0x15d0 mm/shmem.c:1159 shmem_truncate_range mm/shmem.c:1287 [inline] shmem_evict_inode+0x280/0xa80 mm/shmem.c:1417 evict+0x624/0xb50 fs/inode.c:825 dentry_kill+0x1b9/0x880 fs/dcache.c:826 finish_dput+0x1a/0x260 fs/dcache.c:1001 __fput+0x675/0xa50 fs/file_table.c:520 fput_close_sync+0x11f/0x240 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x7e/0x110 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888053c20180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888053c20200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888053c20280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888053c20300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888053c20380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================