trusted_key: encrypted_key: insufficient parameters specified trusted_key: encrypted_key: master key parameter 'usÚרŒe' is invalid ================================================================== BUG: KASAN: slab-use-after-free in key_put+0xea/0x230 security/keys/key.c:656 Read of size 8 at addr ffff8881426c3400 by task syz.4.480/8380 CPU: 1 UID: 0 PID: 8380 Comm: syz.4.480 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 key_put+0xea/0x230 security/keys/key.c:656 __key_create_or_update+0xaf4/0xc70 security/keys/key.c:940 key_create_or_update+0x42/0x60 security/keys/key.c:1018 __do_sys_add_key security/keys/keyctl.c:134 [inline] __se_sys_add_key+0x33f/0x490 security/keys/keyctl.c:74 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f810ed85d29 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:00007f810fb39038 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 00007f810ef75fa0 RCX: 00007f810ed85d29 RDX: 0000000020000100 RSI: 0000000020000180 RDI: 0000000020000140 RBP: 00007f810ee01b08 R08: fffffffffffffffe R09: 0000000000000000 R10: 00000000000000ca R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f810ef75fa0 R15: 00007ffc3db9ce88 Allocated by task 8380: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 key_alloc+0x341/0xff0 security/keys/key.c:277 __key_create_or_update+0xa55/0xc70 security/keys/key.c:930 key_create_or_update+0x42/0x60 security/keys/key.c:1018 __do_sys_add_key security/keys/keyctl.c:134 [inline] __se_sys_add_key+0x33f/0x490 security/keys/keyctl.c:74 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5881: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4711 key_gc_unused_keys+0x389/0x400 security/keys/gc.c:167 key_garbage_collector+0x8b5/0xa00 security/keys/gc.c:300 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff8881426c3340 which belongs to the cache key_jar of size 336 The buggy address is located 192 bytes inside of freed 336-byte region [ffff8881426c3340, ffff8881426c3490) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1426c2 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000040 ffff88801be81140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080120012 00000000f5000000 0000000000000000 head: 057ff00000000040 ffff88801be81140 dead000000000122 0000000000000000 head: 0000000000000000 0000000080120012 00000000f5000000 0000000000000000 head: 057ff00000000001 ffffea000509b081 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 5981233219, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4754 alloc_pages_mpol+0x30e/0x550 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171 key_alloc+0x341/0xff0 security/keys/key.c:277 keyring_alloc+0x44/0xb0 security/keys/keyring.c:526 system_trusted_keyring_init+0x72/0x150 certs/system_keyring.c:231 do_one_initcall+0x248/0x870 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 page_owner free stack trace missing Memory state around the buggy address: ffff8881426c3300: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff8881426c3380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881426c3400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881426c3480: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881426c3500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================