================================================================== BUG: KASAN: use-after-free in reiserfs_release_objectid+0x430/0x614 fs/reiserfs/objectid.c:165 Read of size 8188 at addr ffff0000f8d8f050 by task syz.0.250/5522 CPU: 1 PID: 5522 Comm: syz.0.250 Not tainted 6.1.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x220 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:427 kasan_report+0xa8/0x100 mm/kasan/report.c:531 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x260/0x2a0 mm/kasan/generic.c:189 memmove+0x48/0x90 mm/kasan/shadow.c:54 reiserfs_release_objectid+0x430/0x614 fs/reiserfs/objectid.c:165 remove_save_link+0x21c/0x320 fs/reiserfs/super.c:542 reiserfs_evict_inode+0x2fc/0x3e8 fs/reiserfs/inode.c:91 evict+0x3c8/0x810 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 dentry_unlink_inode+0x360/0x438 fs/dcache.c:405 __dentry_kill+0x320/0x598 fs/dcache.c:611 dentry_kill+0xc8/0x248 fs/dcache.c:-1 dput+0x238/0x454 fs/dcache.c:918 __fput+0x480/0x7c0 fs/file_table.c:328 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the physical page: page:0000000017aba091 refcount:2 mapcount:0 mapping:00000000c2c8bf72 index:0x10 pfn:0x138d8f memcg:ffff0000e3d4c000 aops:def_blk_aops ino:700000 flags: 0x5ffd60000022056(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffd60000022056 fffffc0003e12348 fffffc0003856248 ffff0000c053a910 raw: 0000000000000010 ffff0000e34852b8 00000002ffffffff ffff0000e3d4c000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f8d8ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f8d8ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000f8d90000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000f8d90080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000f8d90100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================