syzbot

trusted_key: encrypted_key: keyword 'ep[ate' not recognized
==================================================================
BUG: KASAN: slab-use-after-free in constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
BUG: KASAN: slab-use-after-free in arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
BUG: KASAN: slab-use-after-free in key_put+0x76/0x230 security/keys/key.c:655
Read of size 8 at addr ffff888063e65eb8 by task syz.2.562/7998

CPU: 1 UID: 0 PID: 7998 Comm: syz.2.562 Not tainted 6.11.0-rc5-syzkaller-00219-g1934261d8974 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
 arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
 key_put+0x76/0x230 security/keys/key.c:655
 __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: 0033:0x7fcafd579eb9
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:00007fcafcfbd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007fcafd716130 RCX: 00007fcafd579eb9
RDX: 0000000020000100 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 00007fcafd5e793e R08: fffffffffffffffe R09: 0000000000000000
R10: 00000000000000ca R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcafd716130 R15: 00007ffd7d093298
 </TASK>

Allocated by task 7998:
 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:312 [inline]
 __kasan_slab_alloc+0x66/0x80 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+0x135/0x2a0 mm/slub.c:4044
 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 5234:
 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:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 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+0x145/0x350 mm/slub.c:4548
 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:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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 ffff888063e65dc0
 which belongs to the cache key_jar of size 336
The buggy address is located 248 bytes inside of
 freed 336-byte region [ffff888063e65dc0, ffff888063e65f10)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888063e65880 pfn:0x63e64
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 ffff88801b6fe140 dead000000000122 0000000000000000
raw: ffff888063e65880 0000000080120011 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801b6fe140 dead000000000122 0000000000000000
head: ffff888063e65880 0000000080120011 00000001fdffffff 0000000000000000
head: 00fff00000000001 ffffea00018f9901 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5618, tgid 5612 (syz.3.77), ts 127302737701, free_ts 127290880986
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044
 key_alloc+0x341/0xff0 security/keys/key.c:277
 keyring_alloc+0x44/0xb0 security/keys/keyring.c:526
 install_thread_keyring_to_cred security/keys/process_keys.c:228 [inline]
 install_thread_keyring security/keys/process_keys.c:253 [inline]
 lookup_user_key+0x4b0/0x1500 security/keys/process_keys.c:635
 __do_sys_add_key security/keys/keyctl.c:126 [inline]
 __se_sys_add_key+0x2fa/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
page last free pid 5617 tgid 5617 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd19/0xea0 mm/page_alloc.c:2612
 mm_free_pgd kernel/fork.c:802 [inline]
 __mmdrop+0xb9/0x3d0 kernel/fork.c:918
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x27f0 kernel/exit.c:869
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 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

Memory state around the buggy address:
 ffff888063e65d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888063e65e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888063e65e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888063e65f00: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888063e65f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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