EXT4-fs error (device loop4): ext4_xattr_ibody_get:619: inode #18: comm syz-executor.4: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 Read of size 4 at addr ffff88816e26d008 by task syz-executor.4/11674 CPU: 1 PID: 11674 Comm: syz-executor.4 Not tainted 6.1.25-syzkaller-00065-g1fe248991f96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 ext4_get_max_inline_size+0x13d/0x1f0 fs/ext4/inline.c:113 ext4_try_to_write_inline_data+0xd3/0x1420 fs/ext4/inline.c:663 ext4_write_begin+0x200/0xfb0 fs/ext4/inode.c:1179 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2987 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3766 ext4_buffered_write_iter+0x360/0x640 fs/ext4/file.c:285 ext4_file_write_iter+0x194/0x1cf0 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x902/0xeb0 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff7a8e7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff7a9c180c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff7a8f9bf80 RCX: 00007ff7a8e7cae9 RDX: 0000000000000396 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00007ff7a8ec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff7a8f9bf80 R15: 00007ffcf82d6c08 The buggy address belongs to the physical page: page:ffffea0005b89b40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x16e26d flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0005c14508 ffffea0005b59a48 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 11417, tgid 11415 (syz-executor.1), ts 302457363532, free_ts 302543198403 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2582 prep_new_page+0x1b/0x110 mm/page_alloc.c:2589 get_page_from_freelist+0x2762/0x27f0 mm/page_alloc.c:4387 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5669 __folio_alloc+0x15/0x40 mm/page_alloc.c:5701 __folio_alloc_node include/linux/gfp.h:245 [inline] folio_alloc include/linux/gfp.h:274 [inline] shmem_alloc_folio mm/shmem.c:1580 [inline] shmem_alloc_and_acct_folio+0x78c/0xa50 mm/shmem.c:1605 shmem_get_folio_gfp+0x12d4/0x24b0 mm/shmem.c:1933 shmem_get_folio mm/shmem.c:2064 [inline] shmem_write_begin+0x164/0x3a0 mm/shmem.c:2552 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3766 __generic_file_write_iter+0x174/0x3a0 mm/filemap.c:3894 generic_file_write_iter+0xb1/0x310 mm/filemap.c:3926 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x902/0xeb0 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1494 [inline] free_pcp_prepare mm/page_alloc.c:1568 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3486 free_unref_page_list+0xf6/0x6c0 mm/page_alloc.c:3628 release_pages+0xf7f/0xfe0 mm/swap.c:1055 __pagevec_release+0x84/0x100 mm/swap.c:1075 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] shmem_undo_range+0x609/0x15b0 mm/shmem.c:951 shmem_truncate_range mm/shmem.c:1050 [inline] shmem_evict_inode+0x25f/0xa30 mm/shmem.c:1159 evict+0x2a3/0x630 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput+0x642/0x870 fs/inode.c:1773 dentry_unlink_inode+0x34f/0x440 fs/dcache.c:401 __dentry_kill+0x447/0x650 fs/dcache.c:607 dentry_kill+0xc0/0x2a0 dput+0x160/0x310 fs/dcache.c:913 __fput+0x5f0/0x870 fs/file_table.c:328 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x24d/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x8b/0xa0 kernel/entry/common.c:171 Memory state around the buggy address: ffff88816e26cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88816e26cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88816e26d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88816e26d080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88816e26d100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop4): ext4_validate_block_bitmap:399: comm syz-executor.4: bg 0: block 24: invalid block bitmap