EXT4-fs error (device loop6): ext4_dirty_inode:6039: inode #15: comm syz.6.197: mark_inode_dirty error ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x1390/0x3d30 fs/ext4/xattr.c:1747 Read of size 18446744073709551576 at addr ffff88807184c2d0 by task syz.6.197/5078 CPU: 1 PID: 5078 Comm: syz.6.197 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x1390/0x3d30 fs/ext4/xattr.c:1747 ext4_xattr_ibody_set+0x112/0x330 fs/ext4/xattr.c:2252 ext4_xattr_move_to_block fs/ext4/xattr.c:2639 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2707 [inline] ext4_expand_extra_isize_ea+0xf9a/0x19a0 fs/ext4/xattr.c:2799 __ext4_expand_extra_isize+0x301/0x3e0 fs/ext4/inode.c:5886 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5929 [inline] __ext4_mark_inode_dirty+0x469/0x700 fs/ext4/inode.c:6007 ext4_setattr+0x13b7/0x19e0 fs/ext4/inode.c:5548 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x197/0x220 fs/open.c:65 handle_truncate fs/namei.c:3265 [inline] do_open fs/namei.c:3612 [inline] path_openat+0x28af/0x2f30 fs/namei.c:3742 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_creat fs/open.c:1345 [inline] __se_sys_creat fs/open.c:1339 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1339 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0319191929 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:00007f0316fd8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f03193b9080 RCX: 00007f0319191929 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00002000000000c0 RBP: 00007f0319213b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f03193b9080 R15: 00007ffdb8e55de8 The buggy address belongs to the page: page:ffffea0001c61300 refcount:2 mapcount:0 mapping:ffff88802040abf0 index:0x2 pfn:0x7184c memcg:ffff8880797a0000 aops:def_blk_aops ino:700006 flags: 0xfff00000002036(referenced|uptodate|lru|active|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002036 ffffea000194f688 ffffea0001a27b88 ffff88802040abf0 raw: 0000000000000002 ffff888060bf6bc8 00000002ffffffff ffff8880797a0000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 5053, ts 100312963250, free_ts 100287676955 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 __page_cache_alloc+0xd2/0x3f0 mm/filemap.c:1022 pagecache_get_page+0x986/0xef0 mm/filemap.c:1940 find_or_create_page include/linux/pagemap.h:420 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x249/0xb70 fs/buffer.c:1336 sb_getblk include/linux/buffer_head.h:361 [inline] __ext4_get_inode_loc+0x461/0xcd0 fs/ext4/inode.c:4326 ext4_get_inode_loc fs/ext4/inode.c:4450 [inline] ext4_reserve_inode_write+0x140/0x2e0 fs/ext4/inode.c:5825 __ext4_mark_inode_dirty+0x142/0x700 fs/ext4/inode.c:6002 __ext4_new_inode+0x30ba/0x39e0 fs/ext4/ialloc.c:1351 ext4_create+0x22a/0x460 fs/ext4/namei.c:2883 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x11e1/0x2f30 fs/namei.c:3739 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_creat fs/open.c:1345 [inline] __se_sys_creat fs/open.c:1339 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1339 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page_list+0x122/0x7e0 mm/page_alloc.c:3433 release_pages+0x184b/0x1bb0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x164/0x2e0 mm/mmu_gather.c:338 unmap_region+0x315/0x360 mm/mmap.c:2657 __do_munmap+0x9d3/0xdc0 mm/mmap.c:2887 __vm_munmap+0x137/0x230 mm/mmap.c:2940 __do_sys_munmap mm/mmap.c:2966 [inline] __se_sys_munmap mm/mmap.c:2962 [inline] __x64_sys_munmap+0x67/0x70 mm/mmap.c:2962 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff88807184c180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807184c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807184c280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88807184c300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807184c380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================