KASAN: slab-use-after-free Write in binder_add_device

=========================================================
==================================================================
BUG: KASAN: slab-use-after-free in hlist_add_head include/linux/list.h:1026 [inline]
BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0 drivers/android/binder.c:6932
Write of size 8 at addr ffff888032b69c08 by task syz-executor/5846

CPU: 0 UID: 0 PID: 5846 Comm: syz-executor Not tainted 6.13.0-rc7-next-20250115-syzkaller-ge7bb221a6389 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __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
 hlist_add_head include/linux/list.h:1026 [inline]
 binder_add_device+0x5f/0xa0 drivers/android/binder.c:6932
 binderfs_binder_device_create+0x7bf/0x9c0 drivers/android/binderfs.c:210
 binderfs_fill_super+0x944/0xd90 drivers/android/binderfs.c:729
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb7/0x140 fs/super.c:1299
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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: 0033:0x7fc2409874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe32c2e568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc240a01e6b RCX: 00007fc2409874ca
RDX: 00007fc240a0ebc7 RSI: 00007fc240a01e6b RDI: 00007fc240a0ebc7
RBP: 00007fc240a02063 R08: 0000000000000000 R09: 00000000000001ff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2409e41c8
R13: 00007fc2409e41a8 R14: 0000000000000009 R15: 0000000000000000
 </TASK>

Allocated by task 5843:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4325
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 binderfs_binder_device_create+0x16c/0x9c0 drivers/android/binderfs.c:147
 binderfs_fill_super+0x944/0xd90 drivers/android/binderfs.c:729
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb7/0x140 fs/super.c:1299
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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 5843:
 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]
 kfree+0x196/0x430 mm/slub.c:4757
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x20d/0x630 fs/dcache.c:625
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1070
 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1097
 shrink_dcache_parent+0xcb/0x3b0
 do_one_tree+0x23/0xe0 fs/dcache.c:1560
 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1577
 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620
 kill_anon_super fs/super.c:1237 [inline]
 kill_litter_super+0x76/0xb0 fs/super.c:1247
 binderfs_kill_super+0x44/0x90 drivers/android/binderfs.c:791
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2a/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 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

The buggy address belongs to the object at ffff888032b69c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 freed 512-byte region [ffff888032b69c00, ffff888032b69e00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32b68
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac41c80 ffffea0000ccc200 dead000000000002
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac41c80 ffffea0000ccc200 dead000000000002
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000cada01 ffffffffffffffff 0000000000000000
head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5218, tgid 5218 (udevd), ts 32182122527, free_ts 32146621562
 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:4739
 alloc_pages_mpol+0x311/0x660 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]
 __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 kernfs_fop_open+0x3e0/0xd10 fs/kernfs/file.c:623
 do_dentry_open+0xdec/0x1960 fs/open.c:955
 vfs_open+0x3b/0x370 fs/open.c:1085
 do_open fs/namei.c:3828 [inline]
 path_openat+0x2c74/0x3580 fs/namei.c:3987
 do_filp_open+0x27f/0x4e0 fs/namei.c:4014
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1427
 do_sys_open fs/open.c:1442 [inline]
 __do_sys_openat fs/open.c:1458 [inline]
 __se_sys_openat fs/open.c:1453 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 5212 tgid 5212 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 __slab_free+0x2c2/0x380 mm/slub.c:4520
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 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
 getname_flags+0xb7/0x540 fs/namei.c:139
 do_sys_openat2+0xd2/0x1d0 fs/open.c:1421
 do_sys_open fs/open.c:1442 [inline]
 __do_sys_openat fs/open.c:1458 [inline]
 __se_sys_openat fs/open.c:1453 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1453
 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:
 ffff888032b69b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888032b69b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888032b69c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff888032b69c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032b69d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


Warning: Permanently added '10.128.1.30' (ED25519) to the list of known hosts.
2025/01/16 04:41:29 ignoring optional flag "sandboxArg"="0"
2025/01/16 04:41:30 parsed 1 programs
[   66.779395][ T5834] cgroup: Unknown subsys name 'net'
[   66.911092][ T5834] cgroup: Unknown subsys name 'cpuset'
[   66.918536][ T5834] cgroup: Unknown subsys name 'rlimit'
[   68.216937][ T5834] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   70.769757][ T5852] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   70.770823][ T5852] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   70.771358][ T5852] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   70.772414][ T5852] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   70.777810][ T5852] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[   70.785060][ T5852] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   71.096875][ T5846] =========================================================
** replaying previous printk message **
[   71.096875][ T5846] ==================================================================
[   71.096912][ T5846] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[   71.096954][ T5846] Write of size 8 at addr ffff888032b69c08 by task syz-executor/5846
[   71.096974][ T5846] 
[   71.097007][ T5846] CPU: 0 UID: 0 PID: 5846 Comm: syz-executor Not tainted 6.13.0-rc7-next-20250115-syzkaller-ge7bb221a6389 #0
[   71.097024][ T5846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   71.097037][ T5846] Call Trace:
[   71.097042][ T5846]  <TASK>
[   71.097049][ T5846]  dump_stack_lvl+0x241/0x360
[   71.097067][ T5846]  ? __pfx_dump_stack_lvl+0x10/0x10
[   71.097082][ T5846]  ? __pfx__printk+0x10/0x10
[   71.097104][ T5846]  ? _printk+0xd5/0x120
[   71.097126][ T5846]  ? __virt_addr_valid+0x183/0x530
[   71.097149][ T5846]  ? __virt_addr_valid+0x183/0x530
[   71.097171][ T5846]  print_report+0x169/0x550
[   71.097194][ T5846]  ? __virt_addr_valid+0x183/0x530
[   71.097215][ T5846]  ? __virt_addr_valid+0x183/0x530
[   71.097235][ T5846]  ? __virt_addr_valid+0x45f/0x530
[   71.097256][ T5846]  ? __phys_addr+0xba/0x170
[   71.097277][ T5846]  ? binder_add_device+0x5f/0xa0
[   71.097295][ T5846]  kasan_report+0x143/0x180
[   71.097319][ T5846]  ? binder_add_device+0x5f/0xa0
[   71.097340][ T5846]  binder_add_device+0x5f/0xa0
[   71.097358][ T5846]  binderfs_binder_device_create+0x7bf/0x9c0
[   71.097381][ T5846]  binderfs_fill_super+0x944/0xd90
[   71.097401][ T5846]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.097428][ T5846]  ? shrinker_register+0x160/0x230
[   71.097448][ T5846]  ? sget_fc+0x909/0x9c0
[   71.097467][ T5846]  ? __pfx_set_anon_super_fc+0x10/0x10
[   71.097487][ T5846]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.097506][ T5846]  get_tree_nodev+0xb7/0x140
[   71.097523][ T5846]  vfs_get_tree+0x90/0x2b0
[   71.097543][ T5846]  do_new_mount+0x2be/0xb40
[   71.097560][ T5846]  ? __pfx_do_new_mount+0x10/0x10
[   71.097579][ T5846]  __se_sys_mount+0x2d6/0x3c0
[   71.097595][ T5846]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   71.097618][ T5846]  ? __pfx___se_sys_mount+0x10/0x10
[   71.097634][ T5846]  ? do_syscall_64+0x100/0x230
[   71.097654][ T5846]  ? __x64_sys_mount+0x20/0xc0
[   71.097671][ T5846]  do_syscall_64+0xf3/0x230
[   71.097689][ T5846]  ? clear_bhb_loop+0x35/0x90
[   71.097711][ T5846]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   71.097737][ T5846] RIP: 0033:0x7fc2409874ca
[   71.097759][ T5846] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
[   71.097772][ T5846] RSP: 002b:00007ffe32c2e568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   71.097791][ T5846] RAX: ffffffffffffffda RBX: 00007fc240a01e6b RCX: 00007fc2409874ca
[   71.097803][ T5846] RDX: 00007fc240a0ebc7 RSI: 00007fc240a01e6b RDI: 00007fc240a0ebc7
[   71.097822][ T5846] RBP: 00007fc240a02063 R08: 0000000000000000 R09: 00000000000001ff
[   71.097833][ T5846] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2409e41c8
[   71.097843][ T5846] R13: 00007fc2409e41a8 R14: 0000000000000009 R15: 0000000000000000
[   71.097860][ T5846]  </TASK>
[   71.097867][ T5846] 
[   71.098196][ T5846] Allocated by task 5843:
[   71.098215][ T5846]  kasan_save_track+0x3f/0x80
[   71.098244][ T5846]  __kasan_kmalloc+0x98/0xb0
[   71.098273][ T5846]  __kmalloc_cache_noprof+0x243/0x390
[   71.098299][ T5846]  binderfs_binder_device_create+0x16c/0x9c0
[   71.098326][ T5846]  binderfs_fill_super+0x944/0xd90
[   71.098351][ T5846]  get_tree_nodev+0xb7/0x140
[   71.098378][ T5846]  vfs_get_tree+0x90/0x2b0
[   71.098405][ T5846]  do_new_mount+0x2be/0xb40
[   71.098427][ T5846]  __se_sys_mount+0x2d6/0x3c0
[   71.098449][ T5846]  do_syscall_64+0xf3/0x230
[   71.098475][ T5846]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   71.098503][ T5846] 
[   71.098517][ T5846] Freed by task 5843:
[   71.098534][ T5846]  kasan_save_track+0x3f/0x80
[   71.098562][ T5846]  kasan_save_free_info+0x40/0x50
[   71.098588][ T5846]  __kasan_slab_free+0x59/0x70
[   71.098616][ T5846]  kfree+0x196/0x430
[   71.098639][ T5846]  evict+0x4e8/0x9a0
[   71.098666][ T5846]  __dentry_kill+0x20d/0x630
[   71.098710][ T5846]  shrink_kill+0xa9/0x2c0
[   71.098734][ T5846]  shrink_dentry_list+0x2c0/0x5b0
[   71.098759][ T5846]  shrink_dcache_parent+0xcb/0x3b0
[   71.098786][ T5846]  do_one_tree+0x23/0xe0
[   71.098817][ T5846]  shrink_dcache_for_umount+0xb4/0x180
[   71.098845][ T5846]  generic_shutdown_super+0x6a/0x2d0
[   71.098871][ T5846]  kill_litter_super+0x76/0xb0
[   71.098898][ T5846]  binderfs_kill_super+0x44/0x90
[   71.098922][ T5846]  deactivate_locked_super+0xc4/0x130
[   71.098948][ T5846]  cleanup_mnt+0x41f/0x4b0
[   71.098973][ T5846]  task_work_run+0x24f/0x310
[   71.099001][ T5846]  do_exit+0xa2a/0x28e0
[   71.099028][ T5846]  do_group_exit+0x207/0x2c0
[   71.099054][ T5846]  __x64_sys_exit_group+0x3f/0x40
[   71.099081][ T5846]  x64_sys_call+0x26a8/0x26b0
[   71.099106][ T5846]  do_syscall_64+0xf3/0x230
[   71.099130][ T5846]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   71.099159][ T5846] 
[   71.099173][ T5846] The buggy address belongs to the object at ffff888032b69c00
[   71.099173][ T5846]  which belongs to the cache kmalloc-512 of size 512
[   71.099196][ T5846] The buggy address is located 8 bytes inside of
[   71.099196][ T5846]  freed 512-byte region [ffff888032b69c00, ffff888032b69e00)
[   71.099222][ T5846] 
[   71.099236][ T5846] The buggy address belongs to the physical page:
[   71.099259][ T5846] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32b68
[   71.099290][ T5846] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   71.099311][ T5846] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[   71.099340][ T5846] page_type: f5(slab)
[   71.099365][ T5846] raw: 00fff00000000040 ffff88801ac41c80 ffffea0000ccc200 dead000000000002
[   71.099388][ T5846] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   71.099411][ T5846] head: 00fff00000000040 ffff88801ac41c80 ffffea0000ccc200 dead000000000002
[   71.099432][ T5846] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   71.099455][ T5846] head: 00fff00000000002 ffffea0000cada01 ffffffffffffffff 0000000000000000
[   71.099476][ T5846] head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000
[   71.099491][ T5846] page dumped because: kasan: bad access detected
[   71.099512][ T5846] page_owner tracks the page as allocated
[   71.099531][ T5846] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5218, tgid 5218 (udevd), ts 32182122527, free_ts 32146621562
[   71.099568][ T5846]  post_alloc_hook+0x1f4/0x240
[   71.099592][ T5846]  get_page_from_freelist+0x365c/0x37a0
[   71.099615][ T5846]  __alloc_frozen_pages_noprof+0x292/0x710
[   71.099638][ T5846]  alloc_pages_mpol+0x311/0x660
[   71.099664][ T5846]  allocate_slab+0x8f/0x3a0
[   71.099689][ T5846]  ___slab_alloc+0xc27/0x14a0
[   71.099712][ T5846]  __slab_alloc+0x58/0xa0
[   71.099734][ T5846]  __kmalloc_cache_noprof+0x27b/0x390
[   71.099757][ T5846]  kernfs_fop_open+0x3e0/0xd10
[   71.099783][ T5846]  do_dentry_open+0xdec/0x1960
[   71.099805][ T5846]  vfs_open+0x3b/0x370
[   71.099833][ T5846]  path_openat+0x2c74/0x3580
[   71.099858][ T5846]  do_filp_open+0x27f/0x4e0
[   71.099884][ T5846]  do_sys_openat2+0x13e/0x1d0
[   71.099906][ T5846]  __x64_sys_openat+0x247/0x2a0
[   71.099927][ T5846]  do_syscall_64+0xf3/0x230
[   71.099952][ T5846] page last free pid 5212 tgid 5212 stack trace:
[   71.099968][ T5846]  free_frozen_pages+0xe0d/0x10e0
[   71.099994][ T5846]  __slab_free+0x2c2/0x380
[   71.100020][ T5846]  qlist_free_all+0x9a/0x140
[   71.100051][ T5846]  kasan_quarantine_reduce+0x14f/0x170
[   71.100075][ T5846]  __kasan_slab_alloc+0x23/0x80
[   71.100101][ T5846]  kmem_cache_alloc_noprof+0x1d9/0x380
[   71.100124][ T5846]  getname_flags+0xb7/0x540
[   71.100147][ T5846]  do_sys_openat2+0xd2/0x1d0
[   71.100169][ T5846]  __x64_sys_openat+0x247/0x2a0
[   71.100192][ T5846]  do_syscall_64+0xf3/0x230
[   71.100219][ T5846]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   71.100248][ T5846] 
[   71.100258][ T5846] Memory state around the buggy address:
[   71.100273][ T5846]  ffff888032b69b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   71.100288][ T5846]  ffff888032b69b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   71.100304][ T5846] >ffff888032b69c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.100319][ T5846]                       ^
[   71.100333][ T5846]  ffff888032b69c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.100349][ T5846]  ffff888032b69d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.100365][ T5846] ==================================================================
[   71.106793][ T5846] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   71.945364][ T5846] CPU: 0 UID: 0 PID: 5846 Comm: syz-executor Not tainted 6.13.0-rc7-next-20250115-syzkaller-ge7bb221a6389 #0
[   71.957030][ T5846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   71.967353][ T5846] Call Trace:
[   71.970646][ T5846]  <TASK>
[   71.973592][ T5846]  dump_stack_lvl+0x241/0x360
[   71.978302][ T5846]  ? __pfx_dump_stack_lvl+0x10/0x10
[   71.983490][ T5846]  ? __pfx__printk+0x10/0x10
[   71.988105][ T5846]  ? preempt_schedule+0xe1/0xf0
[   71.993096][ T5846]  ? vscnprintf+0x5d/0x90
[   71.997431][ T5846]  panic+0x349/0x880
[   72.001332][ T5846]  ? check_panic_on_warn+0x21/0xb0
[   72.006527][ T5846]  ? __pfx_panic+0x10/0x10
[   72.010975][ T5846]  ? _raw_spin_unlock_irqrestore+0x130/0x140
[   72.016953][ T5846]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   72.023284][ T5846]  ? print_report+0x502/0x550
[   72.027961][ T5846]  check_panic_on_warn+0x86/0xb0
[   72.032898][ T5846]  ? binder_add_device+0x5f/0xa0
[   72.037837][ T5846]  end_report+0x77/0x160
[   72.042079][ T5846]  kasan_report+0x154/0x180
[   72.046580][ T5846]  ? binder_add_device+0x5f/0xa0
[   72.051551][ T5846]  binder_add_device+0x5f/0xa0
[   72.056312][ T5846]  binderfs_binder_device_create+0x7bf/0x9c0
[   72.062315][ T5846]  binderfs_fill_super+0x944/0xd90
[   72.067437][ T5846]  ? __pfx_binderfs_fill_super+0x10/0x10
[   72.073093][ T5846]  ? shrinker_register+0x160/0x230
[   72.078214][ T5846]  ? sget_fc+0x909/0x9c0
[   72.082477][ T5846]  ? __pfx_set_anon_super_fc+0x10/0x10
[   72.087952][ T5846]  ? __pfx_binderfs_fill_super+0x10/0x10
[   72.093587][ T5846]  get_tree_nodev+0xb7/0x140
[   72.098184][ T5846]  vfs_get_tree+0x90/0x2b0
[   72.102596][ T5846]  do_new_mount+0x2be/0xb40
[   72.107092][ T5846]  ? __pfx_do_new_mount+0x10/0x10
[   72.112109][ T5846]  __se_sys_mount+0x2d6/0x3c0
[   72.116779][ T5846]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   72.122843][ T5846]  ? __pfx___se_sys_mount+0x10/0x10
[   72.128128][ T5846]  ? do_syscall_64+0x100/0x230
[   72.132975][ T5846]  ? __x64_sys_mount+0x20/0xc0
[   72.137736][ T5846]  do_syscall_64+0xf3/0x230
[   72.142262][ T5846]  ? clear_bhb_loop+0x35/0x90
[   72.146974][ T5846]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   72.152868][ T5846] RIP: 0033:0x7fc2409874ca
[   72.157277][ T5846] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
[   72.177049][ T5846] RSP: 002b:00007ffe32c2e568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   72.185460][ T5846] RAX: ffffffffffffffda RBX: 00007fc240a01e6b RCX: 00007fc2409874ca
[   72.193420][ T5846] RDX: 00007fc240a0ebc7 RSI: 00007fc240a01e6b RDI: 00007fc240a0ebc7
[   72.201393][ T5846] RBP: 00007fc240a02063 R08: 0000000000000000 R09: 00000000000001ff
[   72.209364][ T5846] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2409e41c8
[   72.217325][ T5846] R13: 00007fc2409e41a8 R14: 0000000000000009 R15: 0000000000000000
[   72.225379][ T5846]  </TASK>
[   73.362999][ T5846] Shutting down cpus with NMI
[   73.368172][ T5846] Kernel Offset: disabled
[   73.372482][ T5846] Rebooting in 86400 seconds..


syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.7'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build650449299=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 1d58202cd
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1d58202cd938cd702f9fddff39f2be5d9490988c -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241219-091341'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"1d58202cd938cd702f9fddff39f2be5d9490988c\"
/usr/bin/ld: /tmp/ccYhCyec.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking