EXT4-fs (loop7): Remounting filesystem read-only ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x11db/0x3a80 fs/ext4/xattr.c:1738 Read of size 18446744073709551600 at addr ffff888111350eb8 by task syz.7.3033/12042 CPU: 1 PID: 12042 Comm: syz.7.3033 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x11db/0x3a80 fs/ext4/xattr.c:1738 ext4_xattr_ibody_set+0x114/0x330 fs/ext4/xattr.c:2240 ext4_destroy_inline_data_nolock+0x234/0x5e0 fs/ext4/inline.c:468 ext4_convert_inline_data_nolock+0x3df/0xcd0 fs/ext4/inline.c:1279 ext4_convert_inline_data+0x470/0x5b0 fs/ext4/inline.c:2120 ext4_setattr+0xdc7/0x1b10 fs/ext4/inode.c:5555 notify_change+0xc30/0xf40 fs/attr.c:505 do_truncate+0x1ac/0x240 fs/open.c:66 vfs_truncate+0x25b/0x2f0 fs/open.c:112 do_sys_truncate+0xf2/0x1c0 fs/open.c:135 __do_sys_truncate fs/open.c:147 [inline] __se_sys_truncate fs/open.c:145 [inline] __x64_sys_truncate+0x5b/0x70 fs/open.c:145 x64_sys_call+0x212/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:77 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: 0033:0x7f4a1814b0d9 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:00007f4a16ba4028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f4a183d2fa0 RCX: 00007f4a1814b0d9 RDX: 0000000000000000 RSI: 0000000002fffffd RDI: 0000200000000940 RBP: 00007f4a181e2024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4a183d3038 R14: 00007f4a183d2fa0 R15: 00007ffc7b1839e8 The buggy address belongs to the page: page:ffffea000444d400 refcount:3 mapcount:1 mapping:ffff88810930e2d8 index:0x8 pfn:0x111350 memcg:ffff8881002533c0 aops:def_blk_aops ino:700007 flags: 0x4000000000022036(referenced|uptodate|lru|active|private|mappedtodisk|zone=1) raw: 4000000000022036 ffffea00048d80c8 ffffea00046dff48 ffff88810930e2d8 raw: 0000000000000008 ffff888129a2ae70 0000000300000000 ffff8881002533c0 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 9119, ts 1029844752928, free_ts 1026688049492 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] __page_cache_alloc include/linux/pagemap.h:305 [inline] page_cache_ra_unbounded+0x2bc/0x960 mm/readahead.c:227 do_page_cache_ra mm/readahead.c:280 [inline] force_page_cache_ra+0x406/0x460 mm/readahead.c:312 page_cache_sync_ra+0x30f/0x5a0 mm/readahead.c:592 page_cache_sync_readahead include/linux/pagemap.h:831 [inline] filemap_get_pages mm/filemap.c:2571 [inline] filemap_read+0x68b/0x21e0 mm/filemap.c:2656 generic_file_read_iter+0xac/0x420 mm/filemap.c:2816 blkdev_read_iter+0x12f/0x160 block/fops.c:563 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x6c0/0xc20 fs/read_write.c:485 ksys_read+0x14a/0x260 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:631 x64_sys_call+0x96d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1 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:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 free_pages+0x82/0x90 mm/page_alloc.c:5911 kasan_depopulate_vmalloc_pte+0x6b/0x90 mm/kasan/shadow.c:354 apply_to_pte_range mm/memory.c:2645 [inline] apply_to_pmd_range mm/memory.c:2689 [inline] apply_to_pud_range mm/memory.c:2725 [inline] apply_to_p4d_range mm/memory.c:2761 [inline] __apply_to_page_range+0x8ca/0xc70 mm/memory.c:2797 apply_to_existing_page_range+0x38/0x50 mm/memory.c:2830 kasan_release_vmalloc+0x97/0xb0 mm/kasan/shadow.c:464 __purge_vmap_area_lazy+0xa8d/0x1890 mm/vmalloc.c:1723 _vm_unmap_aliases+0x2f1/0x370 mm/vmalloc.c:2126 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:2149 change_page_attr_set_clr+0x317/0xc30 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0x89/0xd0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:919 [inline] bpf_int_jit_compile+0xbf12/0xc4c0 arch/x86/net/bpf_jit_comp.c:2478 bpf_prog_select_runtime+0x6ea/0x9e0 kernel/bpf/core.c:1947 bpf_prog_load+0x10f4/0x1620 kernel/bpf/syscall.c:2332 Memory state around the buggy address: ffff888111350d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888111350e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888111350e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888111350f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888111350f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop7): ext4_read_block_bitmap_nowait:476: comm syz.7.3033: Invalid block bitmap block 1984 in block_group 0 EXT4-fs (loop7): Remounting filesystem read-only EXT4-fs error (device loop7) in ext4_setattr:5676: Corrupt filesystem EXT4-fs (loop7): Remounting filesystem read-only