================================================================== BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:4953 [inline] BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x3ac/0x40d0 fs/ext4/inode.c:5001 Read of size 8 at addr ffff8881d4813040 by task syz-executor405/5906 CPU: 0 PID: 5906 Comm: syz-executor405 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack+0x1e/0x20 lib/dump_stack.c:77 dump_stack+0x15b/0x1b8 lib/dump_stack.c:118 print_address_description+0x8d/0x4c0 mm/kasan/report.c:384 __kasan_report+0xef/0x120 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 check_igot_inode fs/ext4/inode.c:4953 [inline] __ext4_iget+0x3ac/0x40d0 fs/ext4/inode.c:5001 ext4_quota_enable fs/ext4/super.c:6056 [inline] ext4_enable_quotas+0x33b/0x6c0 fs/ext4/super.c:6092 ext4_fill_super+0x7f7c/0x8670 fs/ext4/super.c:4708 mount_bdev+0x279/0x390 fs/super.c:1428 ext4_mount+0x34/0x40 fs/ext4/super.c:6279 legacy_get_tree+0xea/0x190 fs/fs_context.c:648 vfs_get_tree+0x89/0x260 fs/super.c:1558 do_new_mount+0x234/0x480 fs/namespace.c:2850 do_mount+0x63a/0xd40 fs/namespace.c:3170 ksys_mount+0xc5/0x100 fs/namespace.c:3379 __do_sys_mount fs/namespace.c:3393 [inline] __se_sys_mount fs/namespace.c:3390 [inline] __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3390 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f7c4f9f37da Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd352c12d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd352c1330 RCX: 00007f7c4f9f37da RDX: 0000200000000180 RSI: 0000200000000000 RDI: 00007ffd352c1330 RBP: 0000200000000000 R08: 00007ffd352c1370 R09: 00000000000004f4 R10: 000000000021081e R11: 0000000000000206 R12: 0000200000000180 R13: 00007ffd352c1370 R14: 00000000000004fa R15: 00002000000001c0 Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8881d4812b80 which belongs to the cache f2fs_inode_cache of size 1264 The buggy address is located 1216 bytes inside of 1264-byte region [ffff8881d4812b80, ffff8881d4813070) The buggy address belongs to the page: page:ffffea0007520400 refcount:1 mapcount:0 mapping:ffff8881f0feb900 index:0xffff8881d4813660 compound_mapcount: 0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f0feb900 raw: ffff8881d4813660 0000000080170016 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x35e/0x370 mm/page_alloc.c:2171 get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894 alloc_slab_page+0x3c/0x3b0 mm/slub.c:343 allocate_slab mm/slub.c:1683 [inline] new_slab+0x93/0x420 mm/slub.c:1749 new_slab_objects mm/slub.c:2505 [inline] ___slab_alloc+0x29e/0x420 mm/slub.c:2667 __slab_alloc+0x63/0xa0 mm/slub.c:2707 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc+0x12c/0x270 mm/slub.c:2842 f2fs_alloc_inode+0x26/0x3b0 fs/f2fs/super.c:1241 alloc_inode fs/inode.c:231 [inline] iget_locked+0x144/0x810 fs/inode.c:1273 f2fs_iget+0x55/0x4ac0 fs/f2fs/inode.c:499 f2fs_fill_super+0x44fc/0x7760 fs/f2fs/super.c:3963 mount_bdev+0x279/0x390 fs/super.c:1428 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4316 legacy_get_tree+0xea/0x190 fs/fs_context.c:648 vfs_get_tree+0x89/0x260 fs/super.c:1558 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1176 [inline] free_pcp_prepare mm/page_alloc.c:1233 [inline] free_unref_page_prepare+0x2a9/0x3a0 mm/page_alloc.c:3085 free_unref_page_list+0x110/0x4c0 mm/page_alloc.c:3154 release_pages+0xa62/0xaa0 mm/swap.c:842 __pagevec_release+0xbb/0x140 mm/swap.c:862 pagevec_release include/linux/pagevec.h:88 [inline] shmem_undo_range+0x7d8/0x1860 mm/shmem.c:875 shmem_truncate_range mm/shmem.c:997 [inline] shmem_evict_inode+0x204/0x9a0 mm/shmem.c:1097 evict+0x465/0x880 fs/inode.c:610 iput_final fs/inode.c:1652 [inline] iput+0x67d/0x810 fs/inode.c:1678 dentry_unlink_inode+0x2ca/0x370 fs/dcache.c:378 __dentry_kill+0x43e/0x640 fs/dcache.c:583 dentry_kill+0xc0/0x2a0 fs/dcache.c:677 dput+0x42/0x80 fs/dcache.c:864 __fput+0x4ba/0x730 fs/file_table.c:294 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x146/0x170 kernel/task_work.c:113 ptrace_notify+0x212/0x250 kernel/signal.c:2274 Memory state around the buggy address: ffff8881d4812f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d4812f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881d4813000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881d4813080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00 ffff8881d4813100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs warning (device loop3): ext4_enable_quotas:6100: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop3): mount failed F2FS-fs (loop3): invalid crc value F2FS-fs (loop3): recover fsync data on readonly fs F2FS-fs (loop3): Cannot turn on quotas: -2 on 0 F2FS-fs (loop3): checkpoint=disable on readonly fs