loop6: detected capacity change from 0 to 1024 ================================================================== 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+0x2b8/0x3d80 fs/ext4/inode.c:4710 Read of size 8 at addr ffff888131277ef8 by task syz.6.5437/20399 CPU: 0 PID: 20399 Comm: syz.6.5437 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 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+0x2b8/0x3d80 fs/ext4/inode.c:4710 ext4_quota_enable fs/ext4/super.c:6408 [inline] ext4_enable_quotas+0x33b/0x6d0 fs/ext4/super.c:6444 ext4_fill_super+0x87c3/0x9090 fs/ext4/super.c:4951 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6623 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x25a/0xa20 fs/namespace.c:3034 path_mount+0x675/0x1020 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3562 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fbbc9f71e6a 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:00007fbbc8995e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbbc8995ef0 RCX: 00007fbbc9f71e6a RDX: 0000200000000140 RSI: 0000200000000480 RDI: 00007fbbc8995eb0 RBP: 0000200000000140 R08: 00007fbbc8995ef0 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000246 R12: 0000200000000480 R13: 00007fbbc8995eb0 R14: 00000000000005fd R15: 00002000000002c0 Allocated by task 18362: 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+0xbd/0xf0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:-1 [inline] add_free_nid+0xec/0x6d0 fs/f2fs/node.c:2305 scan_nat_page fs/f2fs/node.c:2404 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2510 [inline] f2fs_build_free_nids+0xc3f/0x1170 fs/f2fs/node.c:2548 f2fs_build_node_manager+0x1676/0x1de0 fs/f2fs/node.c:3335 f2fs_fill_super+0x4322/0x6d10 fs/f2fs/super.c:4429 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4705 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x25a/0xa20 fs/namespace.c:3034 path_mount+0x675/0x1020 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3562 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888131277ed8 which belongs to the cache f2fs_free_nid of size 24 The buggy address is located 8 bytes to the right of 24-byte region [ffff888131277ed8, ffff888131277ef0) The buggy address belongs to the page: page:ffffea0004c49dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888131277f28 pfn:0x131277 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004a88a40 0000000300000003 ffff8881003ef680 raw: ffff888131277f28 0000000080660000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 12712, ts 896319715260, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0x138/0x260 mm/slub.c:3260 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:-1 [inline] add_free_nid+0xec/0x6d0 fs/f2fs/node.c:2305 scan_nat_page fs/f2fs/node.c:2404 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2510 [inline] f2fs_build_free_nids+0xc3f/0x1170 fs/f2fs/node.c:2548 f2fs_build_node_manager+0x1676/0x1de0 fs/f2fs/node.c:3335 f2fs_fill_super+0x4322/0x6d10 fs/f2fs/super.c:4429 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4705 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 page_owner free stack trace missing Memory state around the buggy address: ffff888131277d80: fb fc fc fb fb fb fc fc fb fb fb fc fc fb fb fb ffff888131277e00: fc fc fb fb fb fc fc fb fb fb fc fc fb fb fb fc >ffff888131277e80: fc fb fb fb fc fc fb fb fb fc fc fb fb fb fc fc ^ ffff888131277f00: fb fb fb fc fc fb fb fb fc fc fb fb fb fc fc fb ffff888131277f80: fb fb fc fc fb fb fb fc fc fb fb fb fc fc fc fc ================================================================== EXT4-fs warning (device loop6): ext4_enable_quotas:6452: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed