loop0: detected capacity change from 0 to 1024 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. loop0: detected capacity change from 1024 to 64 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 Read of size 18446744073709551600 at addr ffff88804c83dd24 by task syz.0.0/5360 CPU: 0 UID: 0 PID: 5360 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11241-g186f3edfdd41 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2263 ext4_destroy_inline_data_nolock+0x214/0x5b0 fs/ext4/inline.c:463 ext4_convert_inline_data_nolock+0x1f1/0x970 fs/ext4/inline.c:1105 ext4_convert_inline_data+0x4b3/0x5e0 fs/ext4/inline.c:1976 ext4_fallocate+0x1e2/0x3d0 fs/ext4/extents.c:4793 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl+0x611/0x780 fs/ioctl.c:-1 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:577 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff4c058eb69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff4c1389038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff4c07b5fa0 RCX: 00007ff4c058eb69 RDX: 0000200000000000 RSI: 0000000040305829 RDI: 000000000000000a RBP: 00007ff4c0611df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff4c07b5fa0 R15: 00007ffc4e4e3a38 The buggy address belongs to the physical page: page: refcount:4 mapcount:0 mapping:ffff888032164d80 index:0x4 pfn:0x4c83d memcg:ffff88801c2a8d00 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff18000004205(locked|referenced|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff18000004205 0000000000000000 dead000000000122 ffff888032164d80 raw: 0000000000000004 ffff8880437a3828 00000004ffffffff ffff88801c2a8d00 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 5360, tgid 5359 (syz.0.0), ts 85867079250, free_ts 85823445885 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1007 __filemap_get_folio+0x3f2/0xaf0 mm/filemap.c:1981 grow_dev_folio fs/buffer.c:1050 [inline] grow_buffers fs/buffer.c:1116 [inline] __getblk_slow fs/buffer.c:1134 [inline] bdev_getblk+0x1ad/0x660 fs/buffer.c:1461 __getblk include/linux/buffer_head.h:380 [inline] sb_getblk include/linux/buffer_head.h:386 [inline] __ext4_get_inode_loc+0x561/0x1040 fs/ext4/inode.c:4866 ext4_get_inode_loc+0x81/0xf0 fs/ext4/inode.c:4994 ext4_convert_inline_data+0x254/0x5e0 fs/ext4/inline.c:1964 ext4_fallocate+0x1e2/0x3d0 fs/ext4/extents.c:4793 vfs_fallocate+0x669/0x7e0 fs/open.c:342 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl+0x611/0x780 fs/ioctl.c:-1 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:577 page last free pid 5329 tgid 5329 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] free_unref_folios+0xdbd/0x1520 mm/page_alloc.c:2952 folios_put_refs+0x559/0x640 mm/swap.c:997 folios_put include/linux/mm.h:1417 [inline] folio_batch_move_lru+0x319/0x3a0 mm/swap.c:175 lru_add_drain_cpu+0x119/0x880 mm/swap.c:647 lru_add_drain+0x122/0x3e0 mm/swap.c:735 __folio_batch_release+0x48/0x90 mm/swap.c:1054 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x49e/0x14b0 mm/shmem.c:1132 shmem_truncate_range mm/shmem.c:1244 [inline] shmem_evict_inode+0x272/0xa70 mm/shmem.c:1372 evict+0x501/0x9c0 fs/inode.c:810 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 do_renameat2+0x6de/0xa80 fs/namei.c:5280 __do_sys_rename fs/namei.c:5325 [inline] __se_sys_rename fs/namei.c:5323 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5323 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804c83dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804c83dc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804c83dd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88804c83dd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804c83de00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================