trusted_key: encrypted_key: keylen for the ecryptfs format must be equal to 64 bytes
==================================================================
BUG: KASAN: slab-use-after-free in key_put security/keys/key.c:656 [inline]
BUG: KASAN: slab-use-after-free in key_put+0x2ab/0x2b0 security/keys/key.c:646
Read of size 8 at addr ffff88801769bb00 by task syz.1.333/7539

CPU: 0 UID: 0 PID: 7539 Comm: syz.1.333 Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 key_put security/keys/key.c:656 [inline]
 key_put+0x2ab/0x2b0 security/keys/key.c:646
 __key_create_or_update+0x92b/0xe10 security/keys/key.c:940
 key_create_or_update+0x42/0x60 security/keys/key.c:1018
 __do_sys_add_key+0x29c/0x460 security/keys/keyctl.c:134
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faff89779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007faff972c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007faff8b06058 RCX: 00007faff89779f9
RDX: 0000000020000100 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 00007faff89e58ee R08: fffffffffffffffe R09: 0000000000000000
R10: 00000000000000ca R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007faff8b06058 R15: 00007ffd57cebcc8
 </TASK>

Allocated by task 7539:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3988 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4044
 key_alloc+0x3e3/0x13a0 security/keys/key.c:277
 __key_create_or_update+0x71f/0xe10 security/keys/key.c:930
 key_create_or_update+0x42/0x60 security/keys/key.c:1018
 __do_sys_add_key+0x29c/0x460 security/keys/keyctl.c:134
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 7203:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kmem_cache_free+0x12f/0x3a0 mm/slub.c:4548
 key_gc_unused_keys.constprop.0+0x134/0x480 security/keys/gc.c:167
 key_garbage_collector+0x432/0x990 security/keys/gc.c:300
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff88801769ba40
 which belongs to the cache key_jar of size 336
The buggy address is located 192 bytes inside of
 freed 336-byte region [ffff88801769ba40, ffff88801769bb90)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801769ae00 pfn:0x1769a
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff8880166fe140 dead000000000122 0000000000000000
raw: ffff88801769ae00 0000000080120011 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff8880166fe140 dead000000000122 0000000000000000
head: ffff88801769ae00 0000000080120011 00000001fdffffff 0000000000000000
head: 00fff00000000001 ffffea00005da681 ffffffffffffffff 0000000000000000
head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 8226942589, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3442
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4700
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x4e/0xf0 mm/slub.c:2321
 allocate_slab mm/slub.c:2484 [inline]
 new_slab+0x84/0x260 mm/slub.c:2537
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4044
 key_alloc+0xc48/0x13a0 security/keys/key.c:277
 keyring_alloc+0x44/0xc0 security/keys/keyring.c:526
 nfs_idmap_init+0x60/0x1e0 fs/nfs/nfs4idmap.c:210
 init_nfs_v4+0xf/0xa0 fs/nfs/nfs4super.c:293
 do_one_initcall+0x128/0x700 init/main.c:1267
 do_initcall_level init/main.c:1329 [inline]
 do_initcalls init/main.c:1345 [inline]
 do_basic_setup init/main.c:1364 [inline]
 kernel_init_freeable+0x69d/0xca0 init/main.c:1578
 kernel_init+0x1c/0x2b0 init/main.c:1467
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801769ba00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88801769ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801769bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88801769bb80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801769bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================