================================================================== BUG: KASAN: slab-use-after-free in __ext4_iget+0x26c/0x3338 fs/ext4/inode.c:4708 Read of size 8 at addr ffff00012cc685d0 by task syz-executor.1/21947 CPU: 0 PID: 21947 Comm: syz-executor.1 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __ext4_iget+0x26c/0x3338 fs/ext4/inode.c:4708 __ext4_fill_super fs/ext4/super.c:5473 [inline] ext4_fill_super+0x4380/0x56ec fs/ext4/super.c:5703 get_tree_bdev+0x33c/0x4a8 fs/super.c:1577 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5735 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Allocated by task 8346: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x90/0x4a0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc_lru+0x194/0x394 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2868 [inline] reiserfs_alloc_inode+0x2c/0xc4 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:259 [inline] iget5_locked+0xa4/0x234 fs/inode.c:1269 reiserfs_fill_super+0x1088/0x2028 fs/reiserfs/super.c:2053 mount_bdev+0x1e8/0x2b4 fs/super.c:1629 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:492 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:502 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2767 destroy_inode fs/inode.c:314 [inline] evict+0x5fc/0x68c fs/inode.c:679 iput_final fs/inode.c:1775 [inline] iput+0x734/0x818 fs/inode.c:1801 reiserfs_fill_super+0x12b8/0x2028 fs/reiserfs/super.c:2078 mount_bdev+0x1e8/0x2b4 fs/super.c:1629 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3861 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 The buggy address belongs to the object at ffff00012cc68000 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1488 bytes inside of freed 1568-byte region [ffff00012cc68000, ffff00012cc68620) The buggy address belongs to the physical page: page:00000000497589d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff00012cc6bba0 pfn:0x16cc68 head:00000000497589d1 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000d39acc01 flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000840 ffff0000c459d280 dead000000000122 0000000000000000 raw: ffff00012cc6bba0 000000008013000b 00000001ffffffff ffff0000d39acc01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00012cc68480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff00012cc68500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff00012cc68580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff00012cc68600: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff00012cc68680: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop1): corrupt root inode, run e2fsck EXT4-fs (loop1): mount failed