loop0: detected capacity change from 0 to 1024 EXT4-fs: Ignoring removed bh option EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-001000000000 r/w without journal. Quota mode: writeback. loop0: detected capacity change from 1024 to 64 EXT4-fs error (device loop0): ext4_find_dest_de:2050: inode #2: block 16: comm syz.0.0: bad entry in directory: inode out of bounds - offset=0, inode=201326592, rec_len=256, size=1024 fake=0 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1763 Read of size 18446744073709551600 at addr ffff8880529192d0 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+0x9c1/0x1e20 fs/ext4/xattr.c:1763 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2275 ext4_destroy_inline_data_nolock+0x23a/0x5e0 fs/ext4/inline.c:472 ext4_convert_inline_data_nolock+0x208/0x990 fs/ext4/inline.c:1123 ext4_convert_inline_data+0x4ce/0x600 fs/ext4/inline.c:1994 ext4_fallocate+0x1e2/0x3d0 fs/ext4/extents.c:4884 vfs_fallocate+0x669/0x7e0 fs/open.c:338 ksys_fallocate fs/open.c:362 [inline] __do_sys_fallocate fs/open.c:367 [inline] __se_sys_fallocate fs/open.c:365 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:365 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd09419cdd9 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:00007fd095103fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fd094415fa0 RCX: 00007fd09419cdd9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fd094232d69 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000001001f0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd094416038 R14: 00007fd094415fa0 R15: 00007fff977ce818 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88801cc25940 index:0x2 pfn:0x52919 memcg:ffff888043e29400 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff58000004224(referenced|lru|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff58000004224 ffffea00010e0a88 ffff888030448a80 ffff88801cc25940 raw: 0000000000000002 ffff88801f083488 00000002ffffffff ffff888043e29400 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 80524479484, free_ts 80451982561 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 alloc_pages_mpol+0x235/0x490 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:1014 __filemap_get_folio_mpol+0x3fc/0xb00 mm/filemap.c:2012 __filemap_get_folio include/linux/pagemap.h:763 [inline] grow_dev_folio fs/buffer.c:954 [inline] grow_buffers fs/buffer.c:1020 [inline] __getblk_slow fs/buffer.c:1038 [inline] bdev_getblk+0x1f6/0x6e0 fs/buffer.c:1358 __getblk include/linux/buffer_head.h:380 [inline] sb_getblk include/linux/buffer_head.h:386 [inline] __ext4_get_inode_loc+0x528/0xfa0 fs/ext4/inode.c:4890 ext4_get_inode_loc fs/ext4/inode.c:5018 [inline] ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6372 ext4_xattr_set_handle+0x537/0x14c0 fs/ext4/xattr.c:2399 ext4_xattr_set+0x255/0x340 fs/ext4/xattr.c:2561 __vfs_setxattr+0x43c/0x480 fs/xattr.c:218 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252 vfs_setxattr+0x163/0x360 fs/xattr.c:339 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:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0x9ff/0xb40 mm/swap.c:1008 folio_batch_release include/linux/folio_batch.h:101 [inline] shmem_undo_range+0x52c/0x1660 mm/shmem.c:1149 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x289/0xae0 mm/shmem.c:1407 evict+0x61e/0xb10 fs/inode.c:841 __dentry_kill+0x1a2/0x690 fs/dcache.c:718 finish_dput+0xc9/0x480 fs/dcache.c:927 __fput+0x691/0xa60 fs/file_table.c:518 fput_close_sync+0x11f/0x240 fs/file_table.c:615 __do_sys_close fs/open.c:1507 [inline] __se_sys_close fs/open.c:1492 [inline] __x64_sys_close+0x7e/0x110 fs/open.c:1492 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888052919180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888052919200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888052919280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888052919300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888052919380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================