loop2: detected capacity change from 0 to 512 ================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x254/0x31c4 fs/ext4/inode.c:4641 Read of size 8 at addr ffff0000df5f85e0 by task syz-executor.2/5799 CPU: 0 PID: 5799 Comm: syz-executor.2 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 __ext4_iget+0x254/0x31c4 fs/ext4/inode.c:4641 ext4_fill_super+0x690c/0x8768 fs/ext4/super.c:4832 mount_bdev+0x274/0x370 fs/super.c:1387 ext4_mount+0x44/0x58 fs/ext4/super.c:6582 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1517 do_new_mount+0x278/0x8fc fs/namespace.c:3005 path_mount+0x594/0x101c fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount fs/namespace.c:3533 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4385: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8c/0xcc mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x74/0x3f4 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x1dc/0x45c mm/slub.c:3233 reiserfs_alloc_inode+0x24/0xbc fs/reiserfs/super.c:642 alloc_inode fs/inode.c:236 [inline] iget5_locked+0xa4/0x230 fs/inode.c:1199 reiserfs_fill_super+0x101c/0x1e8c fs/reiserfs/super.c:2057 mount_bdev+0x274/0x370 fs/super.c:1387 get_super_block+0x44/0x58 fs/reiserfs/super.c:2608 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1517 do_new_mount+0x278/0x8fc fs/namespace.c:3005 path_mount+0x594/0x101c fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount fs/namespace.c:3533 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x118/0xb40 kernel/rcu/tree.c:3087 destroy_inode fs/inode.c:291 [inline] evict+0x5fc/0x68c fs/inode.c:602 dispose_list fs/inode.c:620 [inline] evict_inodes+0x6b4/0x74c fs/inode.c:670 generic_shutdown_super+0x9c/0x29c fs/super.c:454 kill_block_super+0x70/0xdc fs/super.c:1414 reiserfs_kill_sb+0x134/0x14c fs/reiserfs/super.c:570 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the object at ffff0000df5f8000 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1504 bytes inside of 1568-byte region [ffff0000df5f8000, ffff0000df5f8620) The buggy address belongs to the page: page:00000000f3bf16cc refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000df5f8000 pfn:0x11f5f8 head:00000000f3bf16cc order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000ce312e01 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c609e000 raw: ffff0000df5f8000 0000000080130012 00000001ffffffff ffff0000ce312e01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000df5f8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000df5f8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000df5f8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000df5f8600: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff0000df5f8680: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop2): corrupt root inode, run e2fsck EXT4-fs (loop2): mount failed