loop0: detected capacity change from 0 to 256 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= exfat: Unknown parameter '' loop0: detected capacity change from 0 to 512 EXT4-fs error (device loop0): ext4_xattr_ibody_find:2240: inode #15: comm syz.0.0: corrupted in-inode xattr: invalid ea_ino EXT4-fs error (device loop0): ext4_orphan_get:1394: comm syz.0.0: couldn't read orphan inode 15 (err -117) EXT4-fs (loop0): mounted filesystem 00000007-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KASAN: slab-use-after-free in ext4_insert_dentry+0x3cd/0x780 fs/ext4/namei.c:2119 Write of size 250 at addr ffff888036399f18 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller-00205-g586de92313fc #0 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 lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 ext4_insert_dentry+0x3cd/0x780 fs/ext4/namei.c:2119 add_dirent_to_buf+0x315/0x660 fs/ext4/namei.c:2164 make_indexed_dir+0xcaf/0x1280 fs/ext4/namei.c:2361 ext4_add_entry+0xb36/0xd30 fs/ext4/namei.c:2462 ext4_mkdir+0x554/0xcf0 fs/ext4/namei.c:3039 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4313 do_mkdirat+0x264/0x3a0 fs/namei.c:4336 __do_sys_mkdirat fs/namei.c:4351 [inline] __se_sys_mkdirat fs/namei.c:4349 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4349 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da5b8d169 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:00007f0da6a6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f0da5da5fa0 RCX: 00007f0da5b8d169 RDX: 0000000000000000 RSI: 00002000000005c0 RDI: ffffffffffffff9c RBP: 00007f0da5c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0da5da5fa0 R15: 00007ffee201bc18 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff888000484d78 index:0x3f pfn:0x36399 memcg:ffff88803c23e000 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff10000004014(referenced|dirty|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff10000004014 0000000000000000 dead000000000122 ffff888000484d78 raw: 000000000000003f ffff888043ed9488 00000003ffffffff ffff88803c23e000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x148c40(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL), pid 5325, tgid 5324 (syz.0.0), ts 76860345475, free_ts 76855307409 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4740 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline] alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2371 filemap_alloc_folio_noprof+0xe1/0x540 mm/filemap.c:1018 __filemap_get_folio+0x423/0xb40 mm/filemap.c:1969 grow_dev_folio fs/buffer.c:1039 [inline] grow_buffers fs/buffer.c:1105 [inline] __getblk_slow fs/buffer.c:1131 [inline] bdev_getblk+0x1d4/0x670 fs/buffer.c:1431 getblk_unmovable include/linux/buffer_head.h:369 [inline] ext4_getblk+0x31b/0x880 fs/ext4/inode.c:864 ext4_bread+0x2e/0x180 fs/ext4/inode.c:912 ext4_append+0x327/0x5c0 fs/ext4/namei.c:83 make_indexed_dir+0x3ff/0x1280 fs/ext4/namei.c:2282 ext4_add_entry+0xb36/0xd30 fs/ext4/namei.c:2462 ext4_mkdir+0x554/0xcf0 fs/ext4/namei.c:3039 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4313 page last free pid 17 tgid 17 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 rcu_do_batch kernel/rcu/tree.c:2546 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888036399f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888036399f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88803639a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803639a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803639a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================