loop3: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683 Read of size 8 at addr ffff88810c83fef8 by task syz.3.3735/8431 CPU: 1 PID: 8431 Comm: syz.3.3735 Tainted: G W 5.15.178-syzkaller-00260-g760764029c6d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 check_igot_inode fs/ext4/inode.c:-1 [inline] __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683 ext4_quota_enable fs/ext4/super.c:6379 [inline] ext4_enable_quotas+0x556/0x980 fs/ext4/super.c:6415 ext4_fill_super+0x8b95/0x96e0 fs/ext4/super.c:4951 mount_bdev+0x282/0x3b0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6594 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1530 do_new_mount+0x2ba/0xb30 fs/namespace.c:3012 path_mount+0x671/0x1070 fs/namespace.c:3342 do_mount fs/namespace.c:3355 [inline] __do_sys_mount fs/namespace.c:3563 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3540 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3540 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f69d12c690a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f69cf92ee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f69cf92eef0 RCX: 00007f69d12c690a RDX: 0000200000000780 RSI: 00002000000007c0 RDI: 00007f69cf92eeb0 RBP: 0000200000000780 R08: 00007f69cf92eef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000007c0 R13: 00007f69cf92eeb0 R14: 000000000000074e R15: 0000200000000800 Allocated by task 296: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0xf5/0x250 mm/slub.c:3255 ext4_alloc_inode+0x21/0x640 fs/ext4/super.c:1289 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x64/0x220 fs/inode.c:1001 new_inode+0x28/0x1c0 fs/inode.c:1030 __ext4_new_inode+0x2af/0x4000 fs/ext4/ialloc.c:963 ext4_mkdir+0x421/0xce0 fs/ext4/namei.c:3066 vfs_mkdir+0x3f6/0x610 fs/namei.c:4065 do_mkdirat+0x1eb/0x450 fs/namei.c:4090 __do_sys_mkdirat fs/namei.c:4105 [inline] __se_sys_mkdirat fs/namei.c:4103 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4103 x64_sys_call+0x6c6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88810c83f4e0 which belongs to the cache ext4_inode_cache of size 1368 The buggy address is located 1216 bytes to the right of 1368-byte region [ffff88810c83f4e0, ffff88810c83fa38) The buggy address belongs to the page: page:ffffea0004320e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c838 head:ffffea0004320e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004265000 0000000200000002 ffff888107fb0300 raw: 0000000000000000 0000000000150015 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), pid 283, ts 29724298525, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0x139/0x250 mm/slub.c:3255 ext4_alloc_inode+0x21/0x640 fs/ext4/super.c:1289 alloc_inode fs/inode.c:261 [inline] iget_locked+0x174/0x860 fs/inode.c:1308 __ext4_iget+0x25d/0x3ef0 fs/ext4/inode.c:4679 ext4_lookup+0x691/0xaa0 fs/ext4/namei.c:1858 lookup_open fs/namei.c:3440 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x1194/0x2f40 fs/namei.c:3739 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13f/0x820 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1261 page_owner free stack trace missing Memory state around the buggy address: ffff88810c83fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810c83fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88810c83fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88810c83ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810c83ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs warning (device loop3): ext4_enable_quotas:6423: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop3): mount failed