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. raw-gadget.0 gadget.0: fail, usb_ep_enable returned -22 usb 5-1: USB disconnect, device number 2 loop0: detected capacity change from 2048 to 2047 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+0x9c1/0x1e20 fs/ext4/xattr.c:1763 Read of size 18446744073709551600 at addr ffff888055a36eb8 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+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: 0033:0x7febae99cdd9 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:00007febaadf4fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007febaec15fa0 RCX: 00007febae99cdd9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007febaea32d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007febaec16038 R14: 00007febaec15fa0 R15: 00007ffe3826b468 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88801cc2d940 index:0x2 pfn:0x55a36 memcg:ffff88804484f600 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 ffff88801cc2d940 raw: 0000000000000002 ffff888046ed5bc8 00000002ffffffff ffff88804484f600 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 86774634063, free_ts 86774447104 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+0x81/0xf0 fs/ext4/inode.c:5018 ext4_xattr_ibody_get+0x113/0x4c0 fs/ext4/xattr.c:648 ext4_xattr_get+0x123/0x6a0 fs/ext4/xattr.c:709 __vfs_getxattr+0x3f4/0x430 fs/xattr.c:441 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:1402 [inline] free_unref_folios+0xcec/0x1480 mm/page_alloc.c:3004 folios_put_refs+0x9ff/0xb40 mm/swap.c:1008 folios_put include/linux/mm.h:2149 [inline] folio_batch_move_lru+0x4c2/0x550 mm/swap.c:179 lru_add_drain_cpu+0xb8/0x7b0 mm/swap.c:654 lru_add_drain+0x121/0x3e0 mm/swap.c:743 __folio_batch_release+0x48/0x90 mm/swap.c:1065 folio_batch_release include/linux/folio_batch.h:101 [inline] filemap_splice_read+0xab4/0xd10 mm/filemap.c:3140 do_splice_read fs/splice.c:980 [inline] splice_direct_to_actor+0x478/0xc70 fs/splice.c:1084 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x535/0x7d0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 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: ffff888055a36d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888055a36e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888055a36e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888055a36f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888055a36f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================