loop0: detected capacity change from 0 to 512 EXT4-fs: The data=journal mount option is deprecated and support will be removed in January 2028 EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 512 to 64 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x92b/0x1ed0 fs/ext4/xattr.c:1767 Read of size 18446744073709551600 at addr ffff8880446fc2d0 by task syz.0.0/5351 CPU: 0 UID: 0 PID: 5351 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:1767 ext4_xattr_ibody_set+0x262/0x710 fs/ext4/xattr.c:2277 ext4_destroy_inline_data_nolock+0x23a/0x5f0 fs/ext4/inline.c:471 ext4_convert_inline_data_to_extent+0x549/0xde0 fs/ext4/inline.c:630 ext4_write_begin+0x3bd/0x1900 fs/ext4/inode.c:1432 generic_perform_write+0x2d5/0x8e0 mm/filemap.c:4392 ext4_buffered_write_iter+0x139/0x540 fs/ext4/file.c:372 ext4_file_write_iter+0xae4/0x1cd0 fs/ext4/file.c:-1 aio_write+0x5cb/0x870 fs/aio.c:1687 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x798/0x13d0 fs/aio.c:2111 __do_sys_io_submit fs/aio.c:2170 [inline] __se_sys_io_submit+0x195/0x340 fs/aio.c:2140 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c6939f559 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:00007f9c657f4fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f9c69625fa0 RCX: 00007f9c6939f559 RDX: 0000200000001400 RSI: 0000000000000001 RDI: 00007f9c6a15f000 RBP: 00007f9c69436b50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9c69626038 R14: 00007f9c69625fa0 R15: 00007ffe820f44a8 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff88801e825940 index:0x2 pfn:0x446fc memcg:ffff8880453c5400 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff18000000214(referenced|dirty|workingset|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff18000000214 0000000000000000 dead000000000122 ffff88801e825940 raw: 0000000000000002 ffff88804607fa80 00000003ffffffff ffff8880453c5400 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 5351, tgid 5350 (syz.0.0), ts 96028465246 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1856 prep_new_page mm/page_alloc.c:1864 [inline] get_page_from_freelist+0x220f/0x2280 mm/page_alloc.c:3935 __alloc_frozen_pages_noprof+0x1fe/0x410 mm/page_alloc.c:5444 alloc_pages_mpol+0x21e/0x390 mm/mempolicy.c:2511 alloc_frozen_pages_noprof mm/mempolicy.c:2582 [inline] alloc_pages_noprof+0xb1/0x2b0 mm/mempolicy.c:2602 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2612 filemap_alloc_folio_noprof+0x111/0x460 mm/filemap.c:1018 __filemap_get_folio_mpol+0x3fd/0xff0 mm/filemap.c:2036 __filemap_get_folio include/linux/pagemap.h:758 [inline] grow_dev_folio fs/buffer.c:856 [inline] grow_buffers fs/buffer.c:922 [inline] __getblk_slow fs/buffer.c:940 [inline] bdev_getblk+0x1ec/0x670 fs/buffer.c:1350 __getblk include/linux/buffer_head.h:436 [inline] sb_getblk include/linux/buffer_head.h:442 [inline] __ext4_get_inode_loc+0x56c/0xf40 fs/ext4/inode.c:5738 ext4_get_inode_loc+0x81/0xf0 fs/ext4/inode.c:5866 ext4_inline_data_iomap+0x146/0x470 fs/ext4/inline.c:1840 ext4_iomap_begin_report fs/ext4/inode.c:4015 [inline] iomap_iter_next include/linux/iomap.h:382 [inline] ext4_iomap_next_report+0x2b5/0x680 fs/ext4/inode.c:4054 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:123 iomap_fiemap+0x1db/0x5a0 fs/iomap/fiemap.c:76 ext4_fiemap+0x288/0x330 fs/ext4/extents.c:-1 page last free pid 5297 tgid 5297 ts 95980151672 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1403 [inline] free_unref_folios+0xdc6/0x14e0 mm/page_alloc.c:3014 folios_put_refs+0x9e9/0xb30 mm/folio.c:1039 folio_batch_release include/linux/folio_batch.h:101 [inline] shmem_undo_range+0x547/0x15d0 mm/shmem.c:1371 shmem_truncate_range mm/shmem.c:1496 [inline] shmem_evict_inode+0x240/0xb00 mm/shmem.c:1627 evict+0x624/0xb50 fs/inode.c:822 dentry_kill+0x1b9/0x910 fs/dcache.c:840 finish_dput+0x1a/0x260 fs/dcache.c:1015 end_renaming fs/namei.c:4122 [inline] filename_renameat2+0x61b/0x9a0 fs/namei.c:6340 __do_sys_rename fs/namei.c:6382 [inline] __se_sys_rename+0x55/0x2c0 fs/namei.c:6378 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880446fc180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880446fc200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880446fc280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880446fc300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880446fc380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================