loop0: detected capacity change from 0 to 512 EXT4-fs: Ignoring removed i_version option EXT4-fs: Ignoring removed nobh option 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 511 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x92b/0x1ed0 fs/ext4/xattr.c:1763 Read of size 18446744073709551600 at addr ffff88801aced5b8 by task syz.0.0/5332 CPU: 0 UID: 0 PID: 5332 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_fallocate+0x1e2/0x400 fs/ext4/extents.c:4884 vfs_fallocate+0x65a/0x7e0 fs/open.c:338 ioctl_preallocate fs/ioctl.c:289 [inline] file_ioctl+0x5cf/0x7d0 fs/ioctl.c:332 do_vfs_ioctl+0xc27/0x1530 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 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: 0033:0x7f3979d9e019 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:00007f39761f4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f397a025fa0 RCX: 00007f3979d9e019 RDX: 0000200000000000 RSI: 0000000040305829 RDI: 0000000000000005 RBP: 00007f3979e3500c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f397a026038 R14: 00007f397a025fa0 R15: 00007ffcfc7adf98 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88801d02e4c0 index:0x2 pfn:0x1aced memcg:ffff888043258b80 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0xfff78000004234(referenced|dirty|lru|workingset|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff78000004234 ffff88801cafd560 ffffea00004db188 ffff88801d02e4c0 raw: 0000000000000002 ffff8880130068c0 00000002ffffffff ffff888043258b80 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 5332, tgid 5331 (syz.0.0), ts 94663277297, free_ts 94653334297 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 fs/ext4/inode.c:5019 [inline] ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6424 __ext4_mark_inode_dirty+0x13e/0x700 fs/ext4/inode.c:6602 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6639 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2709 generic_update_time fs/inode.c:2257 [inline] file_update_time_flags+0x3ee/0x4a0 fs/inode.c:2487 ext4_write_checks+0x2a9/0x480 fs/ext4/file.c:281 page last free pid 5332 tgid 5331 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: ffff88801aced480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801aced500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801aced580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88801aced600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801aced680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================