loop8: detected capacity change from 0 to 1024 EXT4-fs (loop8): Quota format mount options ignored when QUOTA feature is enabled ================================================================== BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: use-after-free in __ext4_iget+0x2bb/0x3e80 fs/ext4/inode.c:4722 Read of size 8 at addr ffff888131ab6c18 by task syz.8.955/3646 CPU: 0 PID: 3646 Comm: syz.8.955 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 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+0x10f/0x150 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+0x2bb/0x3e80 fs/ext4/inode.c:4722 ext4_quota_enable fs/ext4/super.c:6435 [inline] ext4_enable_quotas+0x338/0x6d0 fs/ext4/super.c:6471 ext4_fill_super+0x831d/0x8bf0 fs/ext4/super.c:4982 mount_bdev+0x28d/0x3c0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6650 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x251/0xb40 fs/namespace.c:3037 path_mount+0x640/0xff0 fs/namespace.c:3367 do_mount fs/namespace.c:3380 [inline] __do_sys_mount fs/namespace.c:3588 [inline] __se_sys_mount+0x320/0x390 fs/namespace.c:3565 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565 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: 0033:0x7ff079e1428a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff07886be58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff07886bee0 RCX: 00007ff079e1428a RDX: 0000200000000180 RSI: 0000200000000000 RDI: 00007ff07886bea0 RBP: 0000200000000180 R08: 00007ff07886bee0 R09: 0000000001018e58 R10: 0000000001018e58 R11: 0000000000000246 R12: 0000200000000000 R13: 00007ff07886bea0 R14: 000000000000061f R15: 0000200000000280 Allocated by task 3039: 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+0xb7/0xe0 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:2817 [inline] f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1459 alloc_inode fs/inode.c:264 [inline] new_inode_pseudo+0x62/0x210 fs/inode.c:1011 new_inode+0x28/0x1e0 fs/inode.c:1040 f2fs_new_inode+0xe7/0x12b0 fs/f2fs/namei.c:36 f2fs_mkdir+0x12e/0x530 fs/f2fs/namei.c:706 vfs_mkdir+0x38b/0x590 fs/namei.c:4073 do_mkdirat+0x174/0x4d0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259 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 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3011 [inline] call_rcu+0x10b/0xf60 kernel/rcu/tree.c:3129 destroy_inode fs/inode.c:319 [inline] evict+0x810/0x8b0 fs/inode.c:665 iput_final fs/inode.c:1779 [inline] iput+0x651/0x7e0 fs/inode.c:1805 d_delete_notify include/linux/fsnotify.h:278 [inline] vfs_rmdir+0x329/0x450 fs/namei.c:4170 do_rmdir+0x261/0x6b0 fs/namei.c:4218 __do_sys_unlinkat fs/namei.c:4398 [inline] __se_sys_unlinkat fs/namei.c:4392 [inline] __x64_sys_unlinkat+0xc7/0xf0 fs/namei.c:4392 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264 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 ffff888131ab6710 which belongs to the cache f2fs_inode_cache of size 1424 The buggy address is located 1288 bytes inside of 1424-byte region [ffff888131ab6710, ffff888131ab6ca0) The buggy address belongs to the page: page:ffffea0004c6ac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888131ab6100 pfn:0x131ab0 head:ffffea0004c6ac00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881081f6600 raw: ffff888131ab6100 000000008015000f 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 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 2857, ts 153064353895, free_ts 121022968310 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 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:2817 [inline] f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1459 alloc_inode fs/inode.c:264 [inline] iget_locked+0x175/0x850 fs/inode.c:1318 f2fs_iget+0x55/0x5020 fs/f2fs/inode.c:517 f2fs_fill_super+0x3ccd/0x6dd0 fs/f2fs/super.c:4352 mount_bdev+0x28d/0x3c0 fs/super.c:1400 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4713 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __free_slab+0xe5/0x1e0 mm/slub.c:2025 free_slab mm/slub.c:2040 [inline] discard_slab+0x29/0x40 mm/slub.c:2046 __slab_free+0x211/0x290 mm/slub.c:3431 do_slab_free mm/slub.c:3514 [inline] ___cache_free+0x104/0x120 mm/slub.c:3535 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/0xe0 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:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260 getname_flags+0xba/0x510 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 do_sys_openat2+0xeb/0x7f0 fs/open.c:1230 Memory state around the buggy address: ffff888131ab6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888131ab6b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888131ab6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888131ab6c80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888131ab6d00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop8): ext4_quota_enable:6435: inode #3: comm syz.8.955: unexpected EA_INODE flag EXT4-fs error (device loop8): ext4_quota_enable:6438: comm syz.8.955: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop8): ext4_enable_quotas:6479: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop8): mount failed