loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): Ignoring removed mblk_io_submit option ================================================================== BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: use-after-free in __ext4_iget+0x2b5/0x3cb0 fs/ext4/inode.c:4704 Read of size 8 at addr ffff888130b1fef8 by task syz.6.11617/7096 CPU: 0 PID: 7096 Comm: syz.6.11617 Not tainted 5.15.185-syzkaller-00207-g32c443bd6d40 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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+0x2b5/0x3cb0 fs/ext4/inode.c:4704 ext4_quota_enable fs/ext4/super.c:6403 [inline] ext4_enable_quotas+0x33b/0x6d0 fs/ext4/super.c:6439 ext4_fill_super+0x8761/0x9030 fs/ext4/super.c:4951 mount_bdev+0x2ae/0x3e0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6618 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:3014 path_mount+0x675/0x1020 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3542 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3542 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: 0033:0x7f19052f00ca 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:00007f1903956e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1903956ef0 RCX: 00007f19052f00ca RDX: 0000200000000140 RSI: 0000200000000640 RDI: 00007f1903956eb0 RBP: 0000200000000140 R08: 00007f1903956ef0 R09: 0000000003014850 R10: 0000000003014850 R11: 0000000000000246 R12: 0000200000000640 R13: 00007f1903956eb0 R14: 00000000000004c1 R15: 0000200000001540 The buggy address belongs to the page: page:ffffea0004c2c7c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x130b1f flags: 0x4000000000000000(zone=1) raw: 4000000000000000 0000000000000000 ffffea0004c2c7c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x152810(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 738, ts 56396378092, free_ts 809690200889 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:5795 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0xa1/0x4d0 mm/slub.c:1995 ___slab_alloc+0x381/0x810 mm/slub.c:3028 __slab_alloc+0x49/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0x138/0x260 mm/slub.c:3255 xas_alloc lib/xarray.c:374 [inline] xas_create+0xef8/0x1580 lib/xarray.c:676 xas_create_range+0x211/0x720 lib/xarray.c:716 shmem_add_to_page_cache+0x739/0xc30 mm/shmem.c:740 shmem_getpage_gfp+0x1164/0x2310 mm/shmem.c:1946 shmem_fault+0x19d/0x510 mm/shmem.c:2124 __do_fault+0x264/0x2f0 mm/memory.c:4192 do_read_fault mm/memory.c:4556 [inline] do_fault mm/memory.c:4697 [inline] handle_pte_fault+0x1a57/0x2680 mm/memory.c:4911 __handle_mm_fault mm/memory.c:-1 [inline] do_handle_mm_fault+0x1a6d/0x1d50 mm/memory.c:5333 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5871 __free_slab+0xe8/0x1e0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab+0x29/0x40 mm/slub.c:2041 __slab_free+0x211/0x290 mm/slub.c:3426 do_slab_free mm/slub.c:3509 [inline] ___cache_free+0x104/0x120 mm/slub.c:3530 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:443 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:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255 getname_flags+0xb9/0x500 fs/namei.c:138 getname fs/namei.c:217 [inline] __do_sys_unlink fs/namei.c:4396 [inline] __se_sys_unlink fs/namei.c:4394 [inline] __x64_sys_unlink+0x3c/0x50 fs/namei.c:4394 x64_sys_call+0x878/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 Memory state around the buggy address: ffff888130b1fd80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888130b1fe00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888130b1fe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888130b1ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888130b1ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs warning (device loop6): ext4_enable_quotas:6447: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed