EXT4-fs (loop7): mounted filesystem without journal. Opts: debug_want_extra_isize=0x000000000000002e,barrier,jqfmt=vfsv0,stripe=0x0000000000004000,test_dummy_encryption,max_batch_time=0x0000000000000004,,errors=continue. Quota mode: none. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x11db/0x3a80 fs/ext4/xattr.c:1736 Read of size 18446744073709551600 at addr ffff88812da16eb8 by task syz.7.999/3752 CPU: 0 PID: 3752 Comm: syz.7.999 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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:1736 ext4_xattr_ibody_set+0x114/0x330 fs/ext4/xattr.c:2238 ext4_destroy_inline_data_nolock+0x234/0x5e0 fs/ext4/inline.c:468 ext4_convert_inline_data_nolock+0x3df/0xcd0 fs/ext4/inline.c:1271 ext4_convert_inline_data+0x470/0x5b0 fs/ext4/inline.c:2112 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: 0033:0x7f3151e3de59 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:00007f3150897028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f31520c5fa0 RCX: 00007f3151e3de59 RDX: 0000000000000000 RSI: 000000000004fed4 RDI: 00002000000001c0 RBP: 00007f3151ed3e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f31520c6038 R14: 00007f31520c5fa0 R15: 00007ffca7ac47a8 The buggy address belongs to the page: page:ffffea0004b68580 refcount:3 mapcount:1 mapping:ffff8881092885d8 index:0x4 pfn:0x12da16 memcg:ffff888100250000 aops:def_blk_aops ino:700007 flags: 0x4000000000022036(referenced|uptodate|lru|active|private|mappedtodisk|zone=1) raw: 4000000000022036 ffffea0004b68508 ffffea00047cd1c8 ffff8881092885d8 raw: 0000000000000004 ffff8881315321f8 0000000300000000 ffff888100250000 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 309, ts 189485266932, free_ts 189476846284 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 tlb_batch_list_free mm/mmu_gather.c:61 [inline] tlb_finish_mmu+0x258/0x310 mm/mmu_gather.c:341 exit_mmap+0x43b/0x8b0 mm/mmap.c:3248 __mmput+0x92/0x300 kernel/fork.c:1185 mmput+0x50/0x150 kernel/fork.c:1208 exit_mm kernel/exit.c:555 [inline] do_exit+0xacc/0x29a0 kernel/exit.c:877 do_group_exit+0x149/0x310 kernel/exit.c:1004 get_signal+0x64f/0x1430 kernel/signal.c:2907 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff88812da16d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812da16e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812da16e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88812da16f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812da16f80: 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.7.999: Invalid block bitmap block 0 in block_group 0 EXT4-fs error (device loop7) in ext4_setattr:5676: Corrupt filesystem