================================================================== BUG: KASAN: use-after-free in __ext4_iget+0x26c/0x3338 fs/ext4/inode.c:4708 Read of size 8 at addr ffff000113bdfff0 by task syz-executor.5/8557 CPU: 0 PID: 8557 Comm: syz-executor.5 Not tainted 6.6.0-rc3-syzkaller-gbf6547d8715b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 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_quota_enable fs/ext4/super.c:7038 [inline] ext4_enable_quotas+0x45c/0x988 fs/ext4/super.c:7074 __ext4_fill_super fs/ext4/super.c:5568 [inline] ext4_fill_super+0x4db4/0x56ec 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+0x58/0x16c 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:591 The buggy address belongs to the physical page: page:00000000ef8fa0d5 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2 pfn:0x153bdf flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000002 0000000000110000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000113bdfe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff000113bdff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff000113bdff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff000113be0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff000113be0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== __quota_error: 109 callbacks suppressed Quota error (device loop5): v2_read_header: Failed header read: expected=8 got=0 EXT4-fs warning (device loop5): ext4_enable_quotas:7082: Failed to enable quota tracking (type=0, err=-22, ino=3). Please run e2fsck to fix. EXT4-fs (loop5): mount failed EXT4-fs warning (device nvme0n1p2): __ext4_ioctl:1250: Setting inode version is not supported with metadata_csum enabled.