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 ffff88802a428808 by task syz-executor/5837

CPU: 0 UID: 0 PID: 5837 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-g6537cfb395f3 #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: 0033:0x7fbc943874ca
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:00007ffebb634128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbc94401ecb RCX: 00007fbc943874ca
RDX: 00007fbc9440ec27 RSI: 00007fbc94401ecb RDI: 00007fbc9440ec27
RBP: 00007fbc944020c3 R08: 0000000000000000 R09: 00000000000001ff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc943e41c8
R13: 00007fbc943e41a8 R14: 0000000000000009 R15: 0000000000000000
 </TASK>

Allocated by task 5831:
 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 5831:
 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:643
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1088
 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1115
 shrink_dcache_parent+0xcb/0x3b0
 do_one_tree+0x23/0xe0 fs/dcache.c:1578
 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1595
 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
 get_signal+0x16b2/0x1750 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802a428800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 freed 512-byte region [ffff88802a428800, ffff88802a428a00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a428
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac41c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac41c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000a90a01 ffffffffffffffff 0000000000000000
head: 0000000000000004 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 5209, tgid 5209 (udevadm), ts 23561935765, free_ts 23556105036
 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+0x3651/0x37a0 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:956
 vfs_open+0x3b/0x370 fs/open.c:1086
 do_open fs/namei.c:3830 [inline]
 path_openat+0x2c81/0x3590 fs/namei.c:3989
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
 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 5195 tgid 5195 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe04/0x10e0 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]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0x236/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822
 security_inode_getattr+0x130/0x330 security/security.c:2377
 vfs_getattr+0x2a/0x3a0 fs/stat.c:243
 vfs_fstat fs/stat.c:265 [inline]
 vfs_fstatat+0xa8/0x130 fs/stat.c:366
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat fs/stat.c:526 [inline]
 __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:526
 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:
 ffff88802a428700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802a428780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802a428800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88802a428880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a428900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


Warning: Permanently added '10.128.0.77' (ED25519) to the list of known hosts.
2025/02/19 15:01:46 ignoring optional flag "sandboxArg"="0"
2025/02/19 15:01:47 parsed 1 programs
[   67.281229][ T5818] cgroup: Unknown subsys name 'net'
[   67.390000][ T5818] cgroup: Unknown subsys name 'cpuset'
[   67.397873][ T5818] cgroup: Unknown subsys name 'rlimit'
[   68.651010][ T5818] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   71.464869][ T5831] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[   71.711886][ T5849] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   71.720719][ T5849] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   71.731289][ T5849] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   71.741544][ T1292] ieee802154 phy0 wpan0: encryption failed: -22
[   71.741828][ T5849] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   71.748072][ T1292] ieee802154 phy1 wpan1: encryption failed: -22
[   71.755557][ T5849] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[   71.769318][ T5849] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   71.787865][ T5837] ==================================================================
[   71.796145][ T5837] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[   71.804003][ T5837] Write of size 8 at addr ffff88802a428808 by task syz-executor/5837
[   71.812078][ T5837] 
[   71.814499][ T5837] CPU: 0 UID: 0 PID: 5837 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-g6537cfb395f3 #0
[   71.814520][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   71.814534][ T5837] Call Trace:
[   71.814544][ T5837]  <TASK>
[   71.814551][ T5837]  dump_stack_lvl+0x241/0x360
[   71.814572][ T5837]  ? __pfx_dump_stack_lvl+0x10/0x10
[   71.814587][ T5837]  ? __pfx__printk+0x10/0x10
[   71.814632][ T5837]  ? _printk+0xd5/0x120
[   71.814652][ T5837]  ? __virt_addr_valid+0x183/0x530
[   71.814673][ T5837]  ? __virt_addr_valid+0x183/0x530
[   71.814694][ T5837]  print_report+0x169/0x550
[   71.814713][ T5837]  ? __virt_addr_valid+0x183/0x530
[   71.814732][ T5837]  ? __virt_addr_valid+0x183/0x530
[   71.814751][ T5837]  ? __virt_addr_valid+0x45f/0x530
[   71.814770][ T5837]  ? __phys_addr+0xba/0x170
[   71.814789][ T5837]  ? binder_add_device+0x5f/0xa0
[   71.814805][ T5837]  kasan_report+0x143/0x180
[   71.814823][ T5837]  ? binder_add_device+0x5f/0xa0
[   71.814841][ T5837]  binder_add_device+0x5f/0xa0
[   71.814856][ T5837]  binderfs_binder_device_create+0x7bf/0x9c0
[   71.814882][ T5837]  binderfs_fill_super+0x944/0xd90
[   71.814905][ T5837]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.814932][ T5837]  ? shrinker_register+0x160/0x230
[   71.814954][ T5837]  ? sget_fc+0x909/0x9c0
[   71.814976][ T5837]  ? __pfx_set_anon_super_fc+0x10/0x10
[   71.814991][ T5837]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.815011][ T5837]  get_tree_nodev+0xb7/0x140
[   71.815026][ T5837]  vfs_get_tree+0x90/0x2b0
[   71.815043][ T5837]  do_new_mount+0x2be/0xb40
[   71.815063][ T5837]  ? __pfx_do_new_mount+0x10/0x10
[   71.815084][ T5837]  __se_sys_mount+0x2d6/0x3c0
[   71.815102][ T5837]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   71.815123][ T5837]  ? __pfx___se_sys_mount+0x10/0x10
[   71.815142][ T5837]  ? do_syscall_64+0x100/0x230
[   71.815161][ T5837]  ? __x64_sys_mount+0x20/0xc0
[   71.815180][ T5837]  do_syscall_64+0xf3/0x230
[   71.815197][ T5837]  ? clear_bhb_loop+0x35/0x90
[   71.815218][ T5837]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   71.815237][ T5837] RIP: 0033:0x7fbc943874ca
[   71.815257][ T5837] 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
[   71.815271][ T5837] RSP: 002b:00007ffebb634128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   71.815288][ T5837] RAX: ffffffffffffffda RBX: 00007fbc94401ecb RCX: 00007fbc943874ca
[   71.815300][ T5837] RDX: 00007fbc9440ec27 RSI: 00007fbc94401ecb RDI: 00007fbc9440ec27
[   71.815311][ T5837] RBP: 00007fbc944020c3 R08: 0000000000000000 R09: 00000000000001ff
[   71.815322][ T5837] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc943e41c8
[   71.815332][ T5837] R13: 00007fbc943e41a8 R14: 0000000000000009 R15: 0000000000000000
[   71.815346][ T5837]  </TASK>
[   71.815352][ T5837] 
[   72.089572][ T5837] Allocated by task 5831:
[   72.093974][ T5837]  kasan_save_track+0x3f/0x80
[   72.098643][ T5837]  __kasan_kmalloc+0x98/0xb0
[   72.103234][ T5837]  __kmalloc_cache_noprof+0x243/0x390
[   72.108596][ T5837]  binderfs_binder_device_create+0x16c/0x9c0
[   72.114665][ T5837]  binderfs_fill_super+0x944/0xd90
[   72.119766][ T5837]  get_tree_nodev+0xb7/0x140
[   72.124337][ T5837]  vfs_get_tree+0x90/0x2b0
[   72.128744][ T5837]  do_new_mount+0x2be/0xb40
[   72.133236][ T5837]  __se_sys_mount+0x2d6/0x3c0
[   72.137931][ T5837]  do_syscall_64+0xf3/0x230
[   72.142417][ T5837]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   72.148295][ T5837] 
[   72.150605][ T5837] Freed by task 5831:
[   72.154565][ T5837]  kasan_save_track+0x3f/0x80
[   72.159224][ T5837]  kasan_save_free_info+0x40/0x50
[   72.164234][ T5837]  __kasan_slab_free+0x59/0x70
[   72.169000][ T5837]  kfree+0x196/0x430
[   72.172888][ T5837]  evict+0x4e8/0x9a0
[   72.176765][ T5837]  __dentry_kill+0x20d/0x630
[   72.181339][ T5837]  shrink_kill+0xa9/0x2c0
[   72.185661][ T5837]  shrink_dentry_list+0x2c0/0x5b0
[   72.190668][ T5837]  shrink_dcache_parent+0xcb/0x3b0
[   72.195768][ T5837]  do_one_tree+0x23/0xe0
[   72.199995][ T5837]  shrink_dcache_for_umount+0xb4/0x180
[   72.205442][ T5837]  generic_shutdown_super+0x6a/0x2d0
[   72.210898][ T5837]  kill_litter_super+0x76/0xb0
[   72.215652][ T5837]  binderfs_kill_super+0x44/0x90
[   72.220575][ T5837]  deactivate_locked_super+0xc4/0x130
[   72.225935][ T5837]  cleanup_mnt+0x41f/0x4b0
[   72.230364][ T5837]  task_work_run+0x24f/0x310
[   72.234941][ T5837]  do_exit+0xa2a/0x28e0
[   72.239078][ T5837]  do_group_exit+0x207/0x2c0
[   72.243655][ T5837]  get_signal+0x16b2/0x1750
[   72.248160][ T5837]  arch_do_signal_or_restart+0x96/0x860
[   72.253688][ T5837]  syscall_exit_to_user_mode+0xce/0x340
[   72.259219][ T5837]  do_syscall_64+0x100/0x230
[   72.263807][ T5837]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   72.269709][ T5837] 
[   72.272016][ T5837] The buggy address belongs to the object at ffff88802a428800
[   72.272016][ T5837]  which belongs to the cache kmalloc-512 of size 512
[   72.286051][ T5837] The buggy address is located 8 bytes inside of
[   72.286051][ T5837]  freed 512-byte region [ffff88802a428800, ffff88802a428a00)
[   72.299656][ T5837] 
[   72.301964][ T5837] The buggy address belongs to the physical page:
[   72.308366][ T5837] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a428
[   72.317141][ T5837] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   72.325622][ T5837] anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[   72.333594][ T5837] page_type: f5(slab)
[   72.337767][ T5837] raw: 00fff00000000040 ffff88801ac41c80 0000000000000000 dead000000000001
[   72.346337][ T5837] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   72.354907][ T5837] head: 00fff00000000040 ffff88801ac41c80 0000000000000000 dead000000000001
[   72.363565][ T5837] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   72.372224][ T5837] head: 00fff00000000002 ffffea0000a90a01 ffffffffffffffff 0000000000000000
[   72.380878][ T5837] head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
[   72.389619][ T5837] page dumped because: kasan: bad access detected
[   72.396117][ T5837] page_owner tracks the page as allocated
[   72.401835][ T5837] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5209, tgid 5209 (udevadm), ts 23561935765, free_ts 23556105036
[   72.423275][ T5837]  post_alloc_hook+0x1f4/0x240
[   72.428043][ T5837]  get_page_from_freelist+0x3651/0x37a0
[   72.433580][ T5837]  __alloc_frozen_pages_noprof+0x292/0x710
[   72.439372][ T5837]  alloc_pages_mpol+0x311/0x660
[   72.444217][ T5837]  allocate_slab+0x8f/0x3a0
[   72.448703][ T5837]  ___slab_alloc+0xc27/0x14a0
[   72.453369][ T5837]  __slab_alloc+0x58/0xa0
[   72.457771][ T5837]  __kmalloc_cache_noprof+0x27b/0x390
[   72.463134][ T5837]  kernfs_fop_open+0x3e0/0xd10
[   72.467889][ T5837]  do_dentry_open+0xdec/0x1960
[   72.472637][ T5837]  vfs_open+0x3b/0x370
[   72.476690][ T5837]  path_openat+0x2c81/0x3590
[   72.481266][ T5837]  do_filp_open+0x27f/0x4e0
[   72.485757][ T5837]  do_sys_openat2+0x13e/0x1d0
[   72.490603][ T5837]  __x64_sys_openat+0x247/0x2a0
[   72.495457][ T5837]  do_syscall_64+0xf3/0x230
[   72.499949][ T5837] page last free pid 5195 tgid 5195 stack trace:
[   72.506256][ T5837]  free_frozen_pages+0xe04/0x10e0
[   72.511283][ T5837]  __slab_free+0x2c2/0x380
[   72.515690][ T5837]  qlist_free_all+0x9a/0x140
[   72.520356][ T5837]  kasan_quarantine_reduce+0x14f/0x170
[   72.525813][ T5837]  __kasan_slab_alloc+0x23/0x80
[   72.530650][ T5837]  __kmalloc_noprof+0x236/0x4c0
[   72.535491][ T5837]  tomoyo_realpath_from_path+0xcf/0x5e0
[   72.541029][ T5837]  tomoyo_path_perm+0x2b7/0x740
[   72.545884][ T5837]  security_inode_getattr+0x130/0x330
[   72.551245][ T5837]  vfs_getattr+0x2a/0x3a0
[   72.555563][ T5837]  vfs_fstatat+0xa8/0x130
[   72.559877][ T5837]  __x64_sys_newfstatat+0x11d/0x1a0
[   72.565097][ T5837]  do_syscall_64+0xf3/0x230
[   72.569590][ T5837]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   72.575476][ T5837] 
[   72.577786][ T5837] Memory state around the buggy address:
[   72.583399][ T5837]  ffff88802a428700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   72.591456][ T5837]  ffff88802a428780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   72.599499][ T5837] >ffff88802a428800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   72.607550][ T5837]                       ^
[   72.611946][ T5837]  ffff88802a428880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   72.619989][ T5837]  ffff88802a428900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   72.628029][ T5837] ==================================================================
[   72.646756][ T5837] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   72.654073][ T5837] CPU: 1 UID: 0 PID: 5837 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-g6537cfb395f3 #0
[   72.664411][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   72.674485][ T5837] Call Trace:
[   72.677780][ T5837]  <TASK>
[   72.680725][ T5837]  dump_stack_lvl+0x241/0x360
[   72.685418][ T5837]  ? __pfx_dump_stack_lvl+0x10/0x10
[   72.690619][ T5837]  ? __pfx__printk+0x10/0x10
[   72.695202][ T5837]  ? preempt_schedule+0xe1/0xf0
[   72.700118][ T5837]  ? vscnprintf+0x5d/0x90
[   72.704444][ T5837]  panic+0x349/0x880
[   72.708570][ T5837]  ? check_panic_on_warn+0x21/0xb0
[   72.714222][ T5837]  ? __pfx_panic+0x10/0x10
[   72.718765][ T5837]  ? _raw_spin_unlock_irqrestore+0x130/0x140
[   72.724748][ T5837]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   72.731065][ T5837]  ? print_report+0x502/0x550
[   72.735731][ T5837]  check_panic_on_warn+0x86/0xb0
[   72.740665][ T5837]  ? binder_add_device+0x5f/0xa0
[   72.745589][ T5837]  end_report+0x77/0x160
[   72.749820][ T5837]  kasan_report+0x154/0x180
[   72.754484][ T5837]  ? binder_add_device+0x5f/0xa0
[   72.759415][ T5837]  binder_add_device+0x5f/0xa0
[   72.764164][ T5837]  binderfs_binder_device_create+0x7bf/0x9c0
[   72.770136][ T5837]  binderfs_fill_super+0x944/0xd90
[   72.775258][ T5837]  ? __pfx_binderfs_fill_super+0x10/0x10
[   72.780892][ T5837]  ? shrinker_register+0x160/0x230
[   72.785998][ T5837]  ? sget_fc+0x909/0x9c0
[   72.790340][ T5837]  ? __pfx_set_anon_super_fc+0x10/0x10
[   72.795782][ T5837]  ? __pfx_binderfs_fill_super+0x10/0x10
[   72.801513][ T5837]  get_tree_nodev+0xb7/0x140
[   72.806112][ T5837]  vfs_get_tree+0x90/0x2b0
[   72.810610][ T5837]  do_new_mount+0x2be/0xb40
[   72.815189][ T5837]  ? __pfx_do_new_mount+0x10/0x10
[   72.820204][ T5837]  __se_sys_mount+0x2d6/0x3c0
[   72.824868][ T5837]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   72.830838][ T5837]  ? __pfx___se_sys_mount+0x10/0x10
[   72.836025][ T5837]  ? do_syscall_64+0x100/0x230
[   72.840777][ T5837]  ? __x64_sys_mount+0x20/0xc0
[   72.845527][ T5837]  do_syscall_64+0xf3/0x230
[   72.850020][ T5837]  ? clear_bhb_loop+0x35/0x90
[   72.854688][ T5837]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   72.860569][ T5837] RIP: 0033:0x7fbc943874ca
[   72.865074][ T5837] 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
[   72.884690][ T5837] RSP: 002b:00007ffebb634128 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   72.893104][ T5837] RAX: ffffffffffffffda RBX: 00007fbc94401ecb RCX: 00007fbc943874ca
[   72.901073][ T5837] RDX: 00007fbc9440ec27 RSI: 00007fbc94401ecb RDI: 00007fbc9440ec27
[   72.909031][ T5837] RBP: 00007fbc944020c3 R08: 0000000000000000 R09: 00000000000001ff
[   72.917024][ T5837] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc943e41c8
[   72.925078][ T5837] R13: 00007fbc943e41a8 R14: 0000000000000009 R15: 0000000000000000
[   72.933142][ T5837]  </TASK>
[   72.936468][ T5837] Kernel Offset: disabled
[   72.940781][ T5837] 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-build2823300683=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 6dbc6a9bc7
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=6dbc6a9bc76e06852841ed5c5bdbb78409b17f53 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250110-142744'" "-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=\"6dbc6a9bc76e06852841ed5c5bdbb78409b17f53\"
/usr/bin/ld: /tmp/ccoAxEa9.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