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 ffff8880201f3808 by task syz-executor/5044

CPU: 1 UID: 0 PID: 5044 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller #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+0x90/0x290 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+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f14433772da
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 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:00007ffc668c9ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f14433e3ab5 RCX: 00007f14433772da
RDX: 00007f14433ee092 RSI: 00007f14433e3ab5 RDI: 00007f14433ee092
RBP: 00007f1443504508 R08: 0000000000000000 R09: 00000000000001ff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000000006 R14: 0000000000000009 R15: 0000000000000009
 </TASK>

Allocated by task 5041:
 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+0x7d/0x90 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x23e/0x360 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+0x90/0x290 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+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Freed by task 5041:
 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+0x36/0x50 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+0x181/0x430 mm/slub.c:4757
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x200/0x610 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+0xc4/0x120 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/0x28d0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16a6/0x1740 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x830 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+0xcd/0x330 kernel/entry/common.c:218
 do_syscall_64+0x8e/0x160 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The buggy address belongs to the object at ffff8880201f3800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 freed 512-byte region [ffff8880201f3800, ffff8880201f3a00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x201f0
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 ffff888014c41c80 ffffea0001edfe00 dead000000000002
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888014c41c80 ffffea0001edfe00 dead000000000002
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000807c01 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 4485, tgid 4485 (udevadm), ts 25061635142, free_ts 25055659366
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1ec/0x220 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3607/0x3750 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x256/0x690 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+0xc35/0x14a0 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+0x276/0x360 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+0xdea/0x1960 fs/open.c:956
 vfs_open+0x3b/0x370 fs/open.c:1086
 do_open fs/namei.c:3830 [inline]
 path_openat+0x2c7d/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+0x82/0x160 arch/x86/entry/common.c:83
page last free pid 4484 tgid 4484 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xdf5/0x10b0 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+0x23/0x60 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+0x1d4/0x340 mm/slub.c:4171
 getname_flags+0xb7/0x540 fs/namei.c:139
 do_sys_openat2+0xd2/0x1d0 fs/open.c:1422
 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+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff8880201f3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880201f3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880201f3800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8880201f3880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880201f3900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


Warning: Permanently added '10.128.0.209' (ED25519) to the list of known hosts.
2025/02/10 21:12:23 ignoring optional flag "sandboxArg"="0"
2025/02/10 21:12:23 ignoring optional flag "type"="gce"
2025/02/10 21:12:24 parsed 1 programs
[   65.800672][ T5027] cgroup: Unknown subsys name 'net'
[   65.918222][ T5027] cgroup: Unknown subsys name 'cpuset'
[   65.928009][ T5027] cgroup: Unknown subsys name 'rlimit'
[   65.933824][ T5027] cgroup: Unknown subsys name 'memory'
[   67.384843][ T5027] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   70.341100][ T5065] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   70.349862][ T5065] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   70.358393][ T5065] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   70.366764][ T5065] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   70.376537][ T5065] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[   70.397777][ T5065] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   70.447391][ T5044] ==================================================================
[   70.455527][ T5044] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[   70.460389][ T5042] chnl_net:caif_netlink_parms(): no params data found
[   70.463362][ T5044] Write of size 8 at addr ffff8880201f3808 by task syz-executor/5044
[   70.463384][ T5044] 
[   70.463410][ T5044] CPU: 1 UID: 0 PID: 5044 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller #0
[   70.463429][ T5044] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   70.463444][ T5044] Call Trace:
[   70.463451][ T5044]  <TASK>
[   70.463458][ T5044]  dump_stack_lvl+0x241/0x360
[   70.463486][ T5044]  ? __pfx_dump_stack_lvl+0x10/0x10
[   70.463510][ T5044]  ? __pfx__printk+0x10/0x10
[   70.463536][ T5044]  ? _printk+0xd5/0x120
[   70.463560][ T5044]  ? __virt_addr_valid+0x183/0x530
[   70.463588][ T5044]  ? __virt_addr_valid+0x183/0x530
[   70.463615][ T5044]  print_report+0x169/0x550
[   70.463647][ T5044]  ? __virt_addr_valid+0x183/0x530
[   70.463673][ T5044]  ? __virt_addr_valid+0x183/0x530
[   70.463698][ T5044]  ? __virt_addr_valid+0x45f/0x530
[   70.463724][ T5044]  ? __phys_addr+0xba/0x170
[   70.463750][ T5044]  ? binder_add_device+0x5f/0xa0
[   70.463776][ T5044]  kasan_report+0x143/0x180
[   70.463807][ T5044]  ? binder_add_device+0x5f/0xa0
[   70.463835][ T5044]  binder_add_device+0x5f/0xa0
[   70.463858][ T5044]  binderfs_binder_device_create+0x7bf/0x9c0
[   70.463888][ T5044]  binderfs_fill_super+0x944/0xd90
[   70.463915][ T5044]  ? __pfx_binderfs_fill_super+0x10/0x10
[   70.463956][ T5044]  ? shrinker_register+0x160/0x230
[   70.463985][ T5044]  ? sget_fc+0x909/0x9c0
[   70.464019][ T5044]  ? __pfx_set_anon_super_fc+0x10/0x10
[   70.464041][ T5044]  ? __pfx_binderfs_fill_super+0x10/0x10
[   70.464064][ T5044]  get_tree_nodev+0xb7/0x140
[   70.464086][ T5044]  vfs_get_tree+0x90/0x290
[   70.464112][ T5044]  do_new_mount+0x2be/0xb40
[   70.464140][ T5044]  ? __pfx_do_new_mount+0x10/0x10
[   70.464170][ T5044]  __se_sys_mount+0x2d6/0x3c0
[   70.464197][ T5044]  ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[   70.464227][ T5044]  ? __pfx___se_sys_mount+0x10/0x10
[   70.464256][ T5044]  ? __x64_sys_mount+0x20/0xc0
[   70.464283][ T5044]  do_syscall_64+0x82/0x160
[   70.464302][ T5044]  ? clear_bhb_loop+0x25/0x80
[   70.464333][ T5044]  ? clear_bhb_loop+0x25/0x80
[   70.464365][ T5044]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   70.464401][ T5044] RIP: 0033:0x7f14433772da
[   70.464428][ T5044] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 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
[   70.464447][ T5044] RSP: 002b:00007ffc668c9ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   70.464470][ T5044] RAX: ffffffffffffffda RBX: 00007f14433e3ab5 RCX: 00007f14433772da
[   70.464487][ T5044] RDX: 00007f14433ee092 RSI: 00007f14433e3ab5 RDI: 00007f14433ee092
[   70.464502][ T5044] RBP: 00007f1443504508 R08: 0000000000000000 R09: 00000000000001ff
[   70.464516][ T5044] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
[   70.464530][ T5044] R13: 0000000000000006 R14: 0000000000000009 R15: 0000000000000009
[   70.464550][ T5044]  </TASK>
[   70.464557][ T5044] 
[   70.753078][ T5044] Allocated by task 5041:
[   70.757410][ T5044]  kasan_save_track+0x3f/0x80
[   70.762361][ T5044]  __kasan_kmalloc+0x7d/0x90
[   70.767001][ T5044]  __kmalloc_cache_noprof+0x23e/0x360
[   70.772381][ T5044]  binderfs_binder_device_create+0x16c/0x9c0
[   70.778369][ T5044]  binderfs_fill_super+0x944/0xd90
[   70.783481][ T5044]  get_tree_nodev+0xb7/0x140
[   70.788075][ T5044]  vfs_get_tree+0x90/0x290
[   70.792495][ T5044]  do_new_mount+0x2be/0xb40
[   70.797004][ T5044]  __se_sys_mount+0x2d6/0x3c0
[   70.801708][ T5044]  do_syscall_64+0x82/0x160
[   70.806217][ T5044]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   70.812128][ T5044] 
[   70.814453][ T5044] Freed by task 5041:
[   70.818454][ T5044]  kasan_save_track+0x3f/0x80
[   70.823139][ T5044]  kasan_save_free_info+0x40/0x50
[   70.828164][ T5044]  __kasan_slab_free+0x36/0x50
[   70.832940][ T5044]  kfree+0x181/0x430
[   70.836839][ T5044]  evict+0x4e8/0x9a0
[   70.840736][ T5044]  __dentry_kill+0x200/0x610
[   70.845332][ T5044]  shrink_kill+0xa9/0x2c0
[   70.849674][ T5044]  shrink_dentry_list+0x2c0/0x5b0
[   70.854707][ T5044]  shrink_dcache_parent+0xcb/0x3b0
[   70.859839][ T5044]  do_one_tree+0x23/0xe0
[   70.864093][ T5044]  shrink_dcache_for_umount+0xb4/0x180
[   70.869661][ T5044]  generic_shutdown_super+0x6a/0x2d0
[   70.874959][ T5044]  kill_litter_super+0x76/0xb0
[   70.879728][ T5044]  binderfs_kill_super+0x44/0x90
[   70.884669][ T5044]  deactivate_locked_super+0xc4/0x120
[   70.890052][ T5044]  cleanup_mnt+0x41f/0x4b0
[   70.894477][ T5044]  task_work_run+0x24f/0x310
[   70.899192][ T5044]  do_exit+0xa2a/0x28d0
[   70.903359][ T5044]  do_group_exit+0x207/0x2c0
[   70.907961][ T5044]  get_signal+0x16a6/0x1740
[   70.912469][ T5044]  arch_do_signal_or_restart+0x96/0x830
[   70.918109][ T5044]  syscall_exit_to_user_mode+0xcd/0x330
[   70.923741][ T5044]  do_syscall_64+0x8e/0x160
[   70.928246][ T5044]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   70.934150][ T5044] 
[   70.936519][ T5044] The buggy address belongs to the object at ffff8880201f3800
[   70.936519][ T5044]  which belongs to the cache kmalloc-512 of size 512
[   70.950592][ T5044] The buggy address is located 8 bytes inside of
[   70.950592][ T5044]  freed 512-byte region [ffff8880201f3800, ffff8880201f3a00)
[   70.964245][ T5044] 
[   70.966580][ T5044] The buggy address belongs to the physical page:
[   70.972986][ T5044] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x201f0
[   70.981776][ T5044] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   70.990279][ T5044] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[   70.997829][ T5044] page_type: f5(slab)
[   71.001818][ T5044] raw: 00fff00000000040 ffff888014c41c80 ffffea0001edfe00 dead000000000002
[   71.010415][ T5044] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   71.019099][ T5044] head: 00fff00000000040 ffff888014c41c80 ffffea0001edfe00 dead000000000002
[   71.027773][ T5044] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   71.036445][ T5044] head: 00fff00000000002 ffffea0000807c01 ffffffffffffffff 0000000000000000
[   71.045121][ T5044] head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
[   71.053788][ T5044] page dumped because: kasan: bad access detected
[   71.060226][ T5044] page_owner tracks the page as allocated
[   71.065957][ T5044] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4485, tgid 4485 (udevadm), ts 25061635142, free_ts 25055659366
[   71.087027][ T5044]  post_alloc_hook+0x1ec/0x220
[   71.091807][ T5044]  get_page_from_freelist+0x3607/0x3750
[   71.097369][ T5044]  __alloc_frozen_pages_noprof+0x256/0x690
[   71.103188][ T5044]  alloc_pages_mpol+0x311/0x660
[   71.108059][ T5044]  allocate_slab+0x8f/0x3a0
[   71.112572][ T5044]  ___slab_alloc+0xc35/0x14a0
[   71.117253][ T5044]  __slab_alloc+0x58/0xa0
[   71.121599][ T5044]  __kmalloc_cache_noprof+0x276/0x360
[   71.126976][ T5044]  kernfs_fop_open+0x3e0/0xd10
[   71.131743][ T5044]  do_dentry_open+0xdea/0x1960
[   71.136514][ T5044]  vfs_open+0x3b/0x370
[   71.140587][ T5044]  path_openat+0x2c7d/0x3590
[   71.145181][ T5044]  do_filp_open+0x27f/0x4e0
[   71.149684][ T5044]  do_sys_openat2+0x13e/0x1d0
[   71.154371][ T5044]  __x64_sys_openat+0x247/0x2a0
[   71.159236][ T5044]  do_syscall_64+0x82/0x160
[   71.163743][ T5044] page last free pid 4484 tgid 4484 stack trace:
[   71.170079][ T5044]  free_frozen_pages+0xdf5/0x10b0
[   71.175121][ T5044]  __slab_free+0x2c2/0x380
[   71.179549][ T5044]  qlist_free_all+0x9a/0x140
[   71.184151][ T5044]  kasan_quarantine_reduce+0x14f/0x170
[   71.189660][ T5044]  __kasan_slab_alloc+0x23/0x60
[   71.194528][ T5044]  kmem_cache_alloc_noprof+0x1d4/0x340
[   71.199991][ T5044]  getname_flags+0xb7/0x540
[   71.204507][ T5044]  do_sys_openat2+0xd2/0x1d0
[   71.209109][ T5044]  __x64_sys_openat+0x247/0x2a0
[   71.213977][ T5044]  do_syscall_64+0x82/0x160
[   71.218480][ T5044]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   71.224385][ T5044] 
[   71.226707][ T5044] Memory state around the buggy address:
[   71.232334][ T5044]  ffff8880201f3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   71.240394][ T5044]  ffff8880201f3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   71.248458][ T5044] >ffff8880201f3800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.256537][ T5044]                       ^
[   71.260866][ T5044]  ffff8880201f3880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.268927][ T5044]  ffff8880201f3900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   71.276987][ T5044] ==================================================================
[   71.291710][ T5044] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   71.298955][ T5044] CPU: 1 UID: 0 PID: 5044 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller #0
[   71.308088][ T5044] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   71.318153][ T5044] Call Trace:
[   71.321438][ T5044]  <TASK>
[   71.324372][ T5044]  dump_stack_lvl+0x241/0x360
[   71.329065][ T5044]  ? __pfx_dump_stack_lvl+0x10/0x10
[   71.334268][ T5044]  ? __pfx__printk+0x10/0x10
[   71.338868][ T5044]  ? preempt_schedule+0xe1/0xf0
[   71.343729][ T5044]  ? vscnprintf+0x5d/0x90
[   71.348070][ T5044]  panic+0x349/0x880
[   71.351972][ T5044]  ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[   71.358140][ T5044]  ? check_panic_on_warn+0x21/0xb0
[   71.363268][ T5044]  ? __pfx_panic+0x10/0x10
[   71.367699][ T5044]  ? _raw_spin_unlock_irqrestore+0x130/0x140
[   71.373713][ T5044]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   71.380090][ T5044]  ? print_report+0x502/0x550
[   71.384871][ T5044]  check_panic_on_warn+0x86/0xb0
[   71.389995][ T5044]  ? binder_add_device+0x5f/0xa0
[   71.394939][ T5044]  end_report+0x77/0x150
[   71.399203][ T5044]  kasan_report+0x154/0x180
[   71.403809][ T5044]  ? binder_add_device+0x5f/0xa0
[   71.408763][ T5044]  binder_add_device+0x5f/0xa0
[   71.413544][ T5044]  binderfs_binder_device_create+0x7bf/0x9c0
[   71.419562][ T5044]  binderfs_fill_super+0x944/0xd90
[   71.424682][ T5044]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.430329][ T5044]  ? shrinker_register+0x160/0x230
[   71.435464][ T5044]  ? sget_fc+0x909/0x9c0
[   71.439721][ T5044]  ? __pfx_set_anon_super_fc+0x10/0x10
[   71.445201][ T5044]  ? __pfx_binderfs_fill_super+0x10/0x10
[   71.450867][ T5044]  get_tree_nodev+0xb7/0x140
[   71.455500][ T5044]  vfs_get_tree+0x90/0x290
[   71.459936][ T5044]  do_new_mount+0x2be/0xb40
[   71.464449][ T5044]  ? __pfx_do_new_mount+0x10/0x10
[   71.469491][ T5044]  __se_sys_mount+0x2d6/0x3c0
[   71.474182][ T5044]  ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[   71.480172][ T5044]  ? __pfx___se_sys_mount+0x10/0x10
[   71.485385][ T5044]  ? __x64_sys_mount+0x20/0xc0
[   71.490277][ T5044]  do_syscall_64+0x82/0x160
[   71.494795][ T5044]  ? clear_bhb_loop+0x25/0x80
[   71.499494][ T5044]  ? clear_bhb_loop+0x25/0x80
[   71.504185][ T5044]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   71.510104][ T5044] RIP: 0033:0x7f14433772da
[   71.514531][ T5044] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 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
[   71.534340][ T5044] RSP: 002b:00007ffc668c9ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   71.542764][ T5044] RAX: ffffffffffffffda RBX: 00007f14433e3ab5 RCX: 00007f14433772da
[   71.550775][ T5044] RDX: 00007f14433ee092 RSI: 00007f14433e3ab5 RDI: 00007f14433ee092
[   71.558760][ T5044] RBP: 00007f1443504508 R08: 0000000000000000 R09: 00000000000001ff
[   71.566734][ T5044] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
[   71.574733][ T5044] R13: 0000000000000006 R14: 0000000000000009 R15: 0000000000000009
[   71.582724][ T5044]  </TASK>
[   71.586069][ T5044] Kernel Offset: disabled
[   71.590414][ T5044] 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-build3229865944=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at eaeb5c15ad
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=eaeb5c15ad704753a93bc8f8c7fc422d2a189581 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240711-172551'" "-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=\"eaeb5c15ad704753a93bc8f8c7fc422d2a189581\"
/usr/bin/ld: /tmp/ccASJ02X.o: in function `test_cover_filter()':
executor.cc:(.text+0x133bb): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccASJ02X.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x1a0): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking