EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop0): ext4_xattr_ibody_get:593: inode #18: comm syz-executor213: corrupted in-inode xattr ================================================================== BUG: KASAN: slab-out-of-bounds in get_max_inline_xattr_value_size+0x387/0x530 fs/ext4/inline.c:61 Read of size 4 at addr ffff88811dd24084 by task syz-executor213/371 CPU: 0 PID: 371 Comm: syz-executor213 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 get_max_inline_xattr_value_size+0x387/0x530 fs/ext4/inline.c:61 ext4_get_max_inline_size+0x142/0x200 fs/ext4/inline.c:112 ext4_da_write_inline_data_begin+0x1c0/0x750 fs/ext4/inline.c:900 ext4_da_write_begin+0x532/0xf10 fs/ext4/inode.c:3039 generic_perform_write+0x309/0x5b0 mm/filemap.c:3468 ext4_buffered_write_iter+0x47c/0x610 fs/ext4/file.c:272 ext4_file_write_iter+0x192/0x1c70 fs/ext4/file.c:689 call_write_iter include/linux/fs.h:1969 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xc4a/0xf80 fs/read_write.c:605 ksys_write+0x198/0x2c0 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f0bf6083ab9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe4a46e118 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000000d78b RCX: 00007f0bf6083ab9 RDX: 0000000000000010 RSI: 0000000020000100 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007ffe4a46e140 R09: 00007ffe4a46e140 R10: 00007ffe4a46e140 R11: 0000000000000246 R12: 00007ffe4a46e13c R13: 00007ffe4a46e170 R14: 00007ffe4a46e150 R15: 0000000000000001 Allocated by task 0: (stack is not available) The buggy address belongs to the object at ffff88811dd24000 which belongs to the cache seq_file of size 136 The buggy address is located 132 bytes inside of 136-byte region [ffff88811dd24000, ffff88811dd24088) The buggy address belongs to the page: page:ffffea0004774900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dd24 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff88810017ea80 raw: 0000000000000000 0000000080140014 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 160, ts 55600912345, free_ts 55506420601 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2386 [inline] prep_new_page mm/page_alloc.c:2392 [inline] get_page_from_freelist+0x755/0x810 mm/page_alloc.c:4073 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5160 alloc_slab_page mm/slub.c:1815 [inline] allocate_slab+0x78/0x540 mm/slub.c:1817 new_slab mm/slub.c:1878 [inline] new_slab_objects mm/slub.c:2636 [inline] ___slab_alloc+0x131/0x2e0 mm/slub.c:2800 __slab_alloc+0x63/0xa0 mm/slub.c:2840 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x1ef/0x300 mm/slub.c:2969 kmem_cache_zalloc include/linux/slab.h:654 [inline] seq_open+0x61/0x130 fs/seq_file.c:63 kernfs_fop_open+0x505/0xab0 fs/kernfs/file.c:686 do_dentry_open+0x7a2/0x1090 fs/open.c:819 vfs_open+0x73/0x80 fs/open.c:942 do_open fs/namei.c:3329 [inline] path_openat+0x2638/0x2fd0 fs/namei.c:3448 do_filp_open+0x200/0x440 fs/namei.c:3475 do_sys_openat2+0x13b/0x470 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1332 [inline] free_pcp_prepare+0x18c/0x1c0 mm/page_alloc.c:1406 free_unref_page_prepare mm/page_alloc.c:3293 [inline] free_unref_page_list+0x11d/0x660 mm/page_alloc.c:3367 release_pages+0xc24/0xc60 mm/swap.c:1082 __pagevec_release+0x81/0xf0 mm/swap.c:1102 pagevec_release include/linux/pagevec.h:88 [inline] __invalidate_mapping_pages+0xa16/0xaf0 mm/truncate.c:607 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:632 invalidate_bdev+0xa3/0x140 fs/block_dev.c:97 ext4_put_super+0x69c/0xcc0 fs/ext4/super.c:1244 generic_shutdown_super+0x14f/0x2d0 fs/super.c:465 kill_block_super+0x80/0xe0 fs/super.c:1447 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xc8/0xe0 kernel/entry/common.c:164 Memory state around the buggy address: ffff88811dd23f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811dd24000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811dd24080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88811dd24100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811dd24180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================