================================================================== BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:4953 [inline] BUG: KASAN: use-after-free in __ext4_iget+0x384/0x4330 fs/ext4/inode.c:5001 Read of size 8 at addr ffff8881ba189a80 by task syz-executor.3/20572 CPU: 1 PID: 20572 Comm: syz-executor.3 Not tainted 5.4.254-syzkaller-00010-g5f1cbd78af59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 print_address_description+0x8c/0x600 mm/kasan/report.c:384 __kasan_report+0xf3/0x120 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 check_igot_inode fs/ext4/inode.c:4953 [inline] __ext4_iget+0x384/0x4330 fs/ext4/inode.c:5001 ext4_quota_enable fs/ext4/super.c:6056 [inline] ext4_enable_quotas+0x528/0x940 fs/ext4/super.c:6092 ext4_fill_super+0x84f0/0x8d90 fs/ext4/super.c:4708 mount_bdev+0x267/0x370 fs/super.c:1426 legacy_get_tree+0xdf/0x170 fs/fs_context.c:648 vfs_get_tree+0x85/0x260 fs/super.c:1556 do_new_mount+0x292/0x570 fs/namespace.c:2843 do_mount+0x688/0xe10 fs/namespace.c:3163 ksys_mount+0xc2/0xf0 fs/namespace.c:3372 __do_sys_mount fs/namespace.c:3386 [inline] __se_sys_mount fs/namespace.c:3383 [inline] __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Allocated by task 8281: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2829 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842 f2fs_alloc_inode+0x22/0x3c0 fs/f2fs/super.c:1241 alloc_inode fs/inode.c:231 [inline] iget_locked+0x143/0x790 fs/inode.c:1234 f2fs_iget+0x52/0x4970 fs/f2fs/inode.c:490 f2fs_fill_super+0x68e2/0x8310 fs/f2fs/super.c:4071 mount_bdev+0x267/0x370 fs/super.c:1426 legacy_get_tree+0xdf/0x170 fs/fs_context.c:648 vfs_get_tree+0x85/0x260 fs/super.c:1556 do_new_mount+0x292/0x570 fs/namespace.c:2843 do_mount+0x688/0xe10 fs/namespace.c:3163 ksys_mount+0xc2/0xf0 fs/namespace.c:3372 __do_sys_mount fs/namespace.c:3386 [inline] __se_sys_mount fs/namespace.c:3383 [inline] __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Freed by task 10: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook mm/slub.c:1494 [inline] slab_free mm/slub.c:3080 [inline] kmem_cache_free+0x10b/0x2c0 mm/slub.c:3096 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x492/0xa00 kernel/rcu/tree.c:2167 rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 The buggy address belongs to the object at ffff8881ba1895c0 which belongs to the cache f2fs_inode_cache of size 1264 The buggy address is located 1216 bytes inside of 1264-byte region [ffff8881ba1895c0, ffff8881ba189ab0) The buggy address belongs to the page: page:ffffea0006e86200 refcount:1 mapcount:0 mapping:ffff8881f0f8a780 index:0xffff8881ba18b660 compound_mapcount: 0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f0f8a780 raw: ffff8881ba18b660 000000008017000d 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) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x18f/0x370 mm/page_alloc.c:2171 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891 alloc_slab_page+0x39/0x3c0 mm/slub.c:343 allocate_slab mm/slub.c:1683 [inline] new_slab+0x97/0x440 mm/slub.c:1749 new_slab_objects mm/slub.c:2505 [inline] ___slab_alloc+0x2fe/0x490 mm/slub.c:2667 __slab_alloc+0x62/0xa0 mm/slub.c:2707 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc+0x109/0x250 mm/slub.c:2842 f2fs_alloc_inode+0x22/0x3c0 fs/f2fs/super.c:1241 alloc_inode fs/inode.c:231 [inline] new_inode_pseudo+0x60/0x210 fs/inode.c:927 new_inode+0x25/0x1d0 fs/inode.c:956 f2fs_new_inode+0x11a/0x1470 fs/f2fs/namei.c:35 f2fs_create+0x163/0x11c0 fs/f2fs/namei.c:342 lookup_open fs/namei.c:3309 [inline] do_last fs/namei.c:3401 [inline] path_openat+0x181b/0x3480 fs/namei.c:3614 do_filp_open+0x20b/0x450 fs/namei.c:3644 do_sys_open+0x39c/0x810 fs/open.c:1113 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_pages_ok+0x847/0x950 mm/page_alloc.c:1438 free_the_page mm/page_alloc.c:4953 [inline] __free_pages+0x91/0x140 mm/page_alloc.c:4959 __free_slab+0x221/0x2e0 mm/slub.c:1774 free_slab mm/slub.c:1789 [inline] discard_slab mm/slub.c:1795 [inline] unfreeze_partials+0x14e/0x180 mm/slub.c:2288 put_cpu_partial+0x44/0x180 mm/slub.c:2324 __slab_free+0x297/0x360 mm/slub.c:2971 qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167 quarantine_reduce+0x1d9/0x210 mm/kasan/quarantine.c:260 __kasan_kmalloc+0x41/0x210 mm/kasan/common.c:507 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2829 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc_trace+0xdc/0x260 mm/slub.c:2854 kmem_cache_alloc_node_trace include/linux/slab.h:444 [inline] kmalloc_node include/linux/slab.h:594 [inline] kzalloc_node include/linux/slab.h:701 [inline] __get_vm_area_node+0x183/0x310 mm/vmalloc.c:2059 __vmalloc_node_range+0xee/0x710 mm/vmalloc.c:2494 __vmalloc_node mm/vmalloc.c:2554 [inline] __vmalloc_node_flags mm/vmalloc.c:2568 [inline] vzalloc+0x70/0x80 mm/vmalloc.c:2613 alloc_counters+0x66/0x550 net/ipv4/netfilter/ip_tables.c:800 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:822 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline] do_ipt_get_ctl+0x5b8/0xb60 net/ipv4/netfilter/ip_tables.c:1702 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x28c/0x2b0 net/netfilter/nf_sockopt.c:122 Memory state around the buggy address: ffff8881ba189980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ba189a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881ba189a80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ^ ffff8881ba189b00: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 ffff8881ba189b80: 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