EXT4-fs (loop3): Test dummy encryption mode enabled
[EXT4 FS bs=4096, gc=1, bpg=524288, ipg=32, mo=a842c018, mo2=0003]
System zones: 0-5
==================================================================
BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline]
BUG: KASAN: use-after-free in __ext4_iget+0x381/0x44c0 fs/ext4/inode.c:4798
Read of size 8 at addr ffff8881361efeb8 by task syz.3.533/2569

CPU: 1 PID: 2569 Comm: syz.3.533 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 check_igot_inode fs/ext4/inode.c:-1 [inline]
 __ext4_iget+0x381/0x44c0 fs/ext4/inode.c:4798
 ext4_quota_enable fs/ext4/super.c:6446 [inline]
 ext4_enable_quotas+0x33c/0x6d0 fs/ext4/super.c:6482
 ext4_fill_super+0x84ad/0x8d70 fs/ext4/super.c:5059
 mount_bdev+0x28b/0x3a0 fs/super.c:1442
 ext4_mount+0x34/0x40 fs/ext4/super.c:6661
 legacy_get_tree+0xed/0x190 fs/fs_context.c:593
 vfs_get_tree+0x89/0x260 fs/super.c:1572
 do_new_mount+0x25a/0xa20 fs/namespace.c:3006
 path_mount+0x585/0xc90 fs/namespace.c:3336
 do_mount fs/namespace.c:3349 [inline]
 __do_sys_mount fs/namespace.c:3557 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3534
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3534
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5b29d0d8ca
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:00007f5b28724e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5b28724ee0 RCX: 00007f5b29d0d8ca
RDX: 0000200000000100 RSI: 0000200000000280 RDI: 00007f5b28724ea0
RBP: 0000200000000100 R08: 00007f5b28724ee0 R09: 0000000002800000
R10: 0000000002800000 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f5b28724ea0 R14: 0000000000000bb4 R15: 0000200000000140

Allocated by task 1531:
 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:430 [inline]
 __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965
 proc_alloc_inode+0x1d/0xb0 fs/proc/inode.c:69
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x62/0x210 fs/inode.c:968
 new_inode+0x28/0x1e0 fs/inode.c:997
 proc_pid_make_inode+0x27/0x1d0 fs/proc/base.c:1954
 proc_pident_instantiate+0x69/0x2b0 fs/proc/base.c:2695
 proc_pident_lookup+0x1c0/0x270 fs/proc/base.c:2731
 proc_tgid_base_lookup+0x2b/0x30 fs/proc/base.c:3395
 lookup_open fs/namei.c:3234 [inline]
 open_last_lookups fs/namei.c:3325 [inline]
 path_openat+0x1140/0x31c0 fs/namei.c:3514
 do_filp_open+0x1e2/0x410 fs/namei.c:3544
 do_sys_openat2+0x19f/0x750 fs/open.c:1219
 do_sys_open fs/open.c:1235 [inline]
 __do_sys_openat fs/open.c:1251 [inline]
 __se_sys_openat fs/open.c:1246 [inline]
 __x64_sys_openat+0x136/0x160 fs/open.c:1246
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

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 kernel/rcu/tree.c:2980 [inline]
 call_rcu+0x11a/0x10b0 kernel/rcu/tree.c:3054
 destroy_inode fs/inode.c:288 [inline]
 evict+0x881/0x930 fs/inode.c:629
 iput_final fs/inode.c:1736 [inline]
 iput+0x638/0x7c0 fs/inode.c:1762
 dentry_unlink_inode+0x2cf/0x380 fs/dcache.c:378
 __dentry_kill+0x44f/0x650 fs/dcache.c:583
 shrink_dentry_list+0x38e/0x500 fs/dcache.c:1146
 shrink_dcache_parent+0xa9/0x270 fs/dcache.c:-1
 d_invalidate+0x120/0x300 fs/dcache.c:1682
 proc_invalidate_siblings_dcache+0x298/0x3c0 fs/proc/inode.c:150
 proc_flush_pid+0x1d/0x20 fs/proc/base.c:3428
 release_task+0x10b9/0x1200 kernel/exit.c:270
 wait_task_zombie kernel/exit.c:1171 [inline]
 wait_consider_task+0x1802/0x27d0 kernel/exit.c:1398
 do_wait_thread kernel/exit.c:1461 [inline]
 do_wait+0x244/0x6c0 kernel/exit.c:1532
 kernel_wait4+0x1d1/0x2a0 kernel/exit.c:1694
 __do_sys_wait4 kernel/exit.c:1722 [inline]
 __se_sys_wait4 kernel/exit.c:1718 [inline]
 __x64_sys_wait4+0x163/0x230 kernel/exit.c:1718
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Second to 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 kernel/rcu/tree.c:2980 [inline]
 call_rcu+0x11a/0x10b0 kernel/rcu/tree.c:3054
 destroy_inode fs/inode.c:288 [inline]
 evict+0x881/0x930 fs/inode.c:629
 iput_final fs/inode.c:1736 [inline]
 iput+0x638/0x7c0 fs/inode.c:1762
 dentry_unlink_inode+0x2cf/0x380 fs/dcache.c:378
 __dentry_kill+0x44f/0x650 fs/dcache.c:583
 shrink_dentry_list+0x38e/0x500 fs/dcache.c:1146
 shrink_dcache_parent+0xa9/0x270 fs/dcache.c:-1
 d_invalidate+0x120/0x300 fs/dcache.c:1682
 proc_invalidate_siblings_dcache+0x298/0x3c0 fs/proc/inode.c:150
 proc_flush_pid+0x1d/0x20 fs/proc/base.c:3428
 release_task+0x10b9/0x1200 kernel/exit.c:270
 wait_task_zombie kernel/exit.c:1171 [inline]
 wait_consider_task+0x1802/0x27d0 kernel/exit.c:1398
 do_wait_thread kernel/exit.c:1461 [inline]
 do_wait+0x244/0x6c0 kernel/exit.c:1532
 kernel_wait4+0x1d1/0x2a0 kernel/exit.c:1694
 __do_sys_wait4 kernel/exit.c:1722 [inline]
 __se_sys_wait4 kernel/exit.c:1718 [inline]
 __x64_sys_wait4+0x163/0x230 kernel/exit.c:1718
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881361efc08
 which belongs to the cache proc_inode_cache of size 776
The buggy address is located 688 bytes inside of
 776-byte region [ffff8881361efc08, ffff8881361eff10)
The buggy address belongs to the page:
page:ffffea0004d87b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881361edfc8 pfn:0x1361ec
head:ffffea0004d87b00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 ffffea00046cba00 0000000700000007 ffff88810018a180
raw: ffff8881361edfc8 0000000080120000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 916, ts 54378483176, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5370
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965
 proc_alloc_inode+0x1d/0xb0 fs/proc/inode.c:69
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x62/0x210 fs/inode.c:968
 new_inode+0x28/0x1e0 fs/inode.c:997
 proc_pid_make_inode+0x27/0x1d0 fs/proc/base.c:1954
 proc_pident_instantiate+0x69/0x2b0 fs/proc/base.c:2695
 proc_pident_lookup+0x1c0/0x270 fs/proc/base.c:2731
 proc_tgid_base_lookup+0x2b/0x30 fs/proc/base.c:3395
 __lookup_slow+0x2b8/0x410 fs/namei.c:1648
 lookup_slow+0x57/0x70 fs/namei.c:1665
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881361efd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881361efe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881361efe80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff8881361eff00: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881361eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs warning (device loop3): ext4_enable_quotas:6490: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed