loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 2048 to 64 EXT4-fs error (device loop0): ext4_update_inline_data:362: inode #15: comm syz.0.0: missing inline data xattr ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x92b/0x1ed0 fs/ext4/xattr.c:1763 Read of size 18446744073709551600 at addr ffff88800e5e0eb8 by task syz.0.0/5320 CPU: 0 UID: 0 PID: 5320 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+0x564/0x7d0 fs/ioctl.c:329 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: 0033:0x7fd97e79ce59 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:00007fd97f710fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd97ea15fa0 RCX: 00007fd97e79ce59 RDX: 0000200000000380 RSI: 0000000040305828 RDI: 000000000000000c RBP: 00007fd97e832e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd97ea16038 R14: 00007fd97ea15fa0 R15: 00007ffce4ca7118 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88801cc25940 index:0x2 pfn:0xe5e0 memcg:ffff88803a17b180 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0xfff90000004224(referenced|lru|workingset|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff90000004224 ffff88801c6e5600 ffffea00004a81c8 ffff88801cc25940 raw: 0000000000000002 ffff88801f00cc40 00000002ffffffff ffff88803a17b180 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 5320, tgid 5319 (syz.0.0), ts 67840131280, free_ts 67815665232 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:1014 __filemap_get_folio_mpol+0x402/0x1000 mm/filemap.c:2013 __filemap_get_folio include/linux/pagemap.h:763 [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 5320 tgid 5319 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] free_unref_folios+0xd87/0x14a0 mm/page_alloc.c:3011 folio_batch_move_lru+0x877/0xa60 mm/swap.c:211 lru_add_drain_cpu+0xbc/0x750 mm/swap.c:699 lru_add_drain+0x121/0x3e0 mm/swap.c:788 __folio_batch_release+0x48/0x90 mm/swap.c:1114 folio_batch_release include/linux/folio_batch.h:101 [inline] writeback_get_folio mm/page-writeback.c:2426 [inline] writeback_iter+0x73c/0x1320 mm/page-writeback.c:2529 blkdev_writepages+0x107/0x1b0 block/fops.c:484 do_writepages+0x338/0x560 mm/page-writeback.c:2571 filemap_writeback mm/filemap.c:388 [inline] filemap_fdatawrite_range mm/filemap.c:413 [inline] filemap_write_and_wait_range+0x335/0x3f0 mm/filemap.c:685 loop_set_status+0x245/0xd50 drivers/block/loop.c:1241 loop_set_status64 drivers/block/loop.c:1368 [inline] lo_ioctl+0xc14/0x1fc0 drivers/block/loop.c:1554 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/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 Memory state around the buggy address: ffff88800e5e0d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88800e5e0e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88800e5e0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88800e5e0f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88800e5e0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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