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 ffff888107399208 by task syz-executor/329
CPU: 1 UID: 0 PID: 329 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-00267-gff202c5028a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x184/0x200 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0x163/0x570 mm/kasan/report.c:521
kasan_report+0x15f/0x190 mm/kasan/report.c:634
__asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:386
hlist_add_head include/linux/list.h:1026 [inline]
binder_add_device+0x5f/0xa0 drivers/android/binder.c:6932
binderfs_binder_device_create+0x841/0xaa0 drivers/android/binderfs.c:210
binderfs_fill_super+0x8fb/0xdd0 drivers/android/binderfs.c:729
vfs_get_super fs/super.c:1280 [inline]
get_tree_nodev+0xb9/0x160 fs/super.c:1299
binderfs_fs_context_get_tree+0x1c/0x30 drivers/android/binderfs.c:749
vfs_get_tree+0x8c/0x2c0 fs/super.c:1814
do_new_mount+0x2ba/0xb40 fs/namespace.c:3560
path_mount+0x67c/0x1000 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x2c1/0x3b0 fs/namespace.c:4088
__x64_sys_mount+0xbf/0xe0 fs/namespace.c:4088
x64_sys_call+0x2c9e/0x2df0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x50/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fd418d8e90a
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:00007ffd3a90f458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd418e0e663 RCX: 00007fd418d8e90a
RDX: 00007fd418e1dda7 RSI: 00007fd418e0e663 RDI: 00007fd418e1dda7
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd418e28480
R13: 00007ffd3a90f4d8 R14: 0000000000000009 R15: 0000000000000000
Allocated by task 319:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3b/0x70 mm/kasan/common.c:68
kasan_save_alloc_info+0x38/0x50 mm/kasan/generic.c:562
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x99/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x15f/0x2d0 mm/slub.c:4325
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
binderfs_binder_device_create+0x159/0xaa0 drivers/android/binderfs.c:147
binderfs_fill_super+0x8fb/0xdd0 drivers/android/binderfs.c:729
vfs_get_super fs/super.c:1280 [inline]
get_tree_nodev+0xb9/0x160 fs/super.c:1299
binderfs_fs_context_get_tree+0x1c/0x30 drivers/android/binderfs.c:749
vfs_get_tree+0x8c/0x2c0 fs/super.c:1814
do_new_mount+0x2ba/0xb40 fs/namespace.c:3560
path_mount+0x67c/0x1000 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x2c1/0x3b0 fs/namespace.c:4088
__x64_sys_mount+0xbf/0xe0 fs/namespace.c:4088
x64_sys_call+0x2c9e/0x2df0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x50/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Freed by task 319:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3b/0x70 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+0x53/0x70 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+0x13b/0x350 mm/slub.c:4757
binderfs_evict_inode+0x187/0x220 drivers/android/binderfs.c:278
evict+0x4a7/0x930 fs/inode.c:796
iput_final fs/inode.c:1946 [inline]
iput+0x5ff/0x920 fs/inode.c:1972
dentry_unlink_inode+0x389/0x460 fs/dcache.c:440
__dentry_kill+0x207/0x640 fs/dcache.c:643
shrink_kill fs/dcache.c:1088 [inline]
shrink_dentry_list+0x315/0x510 fs/dcache.c:1115
shrink_dcache_parent+0xce/0x340
do_one_tree+0x27/0xf0 fs/dcache.c:1578
shrink_dcache_for_umount+0xa3/0x140 fs/dcache.c:1595
generic_shutdown_super+0x69/0x300 fs/super.c:620
kill_anon_super+0x46/0x1e0 fs/super.c:1237
kill_litter_super+0x56/0x60 fs/super.c:1247
binderfs_kill_super+0x41/0x60 drivers/android/binderfs.c:791
deactivate_locked_super+0xd8/0x290 fs/super.c:473
deactivate_super+0xc6/0xf0 fs/super.c:506
cleanup_mnt+0x42d/0x4d0 fs/namespace.c:1413
__cleanup_mnt+0x19/0x20 fs/namespace.c:1420
task_work_run+0x252/0x2e0 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xb39/0x2ab0 kernel/exit.c:938
do_group_exit+0x21b/0x2d0 kernel/exit.c:1087
get_signal+0x1553/0x1690 kernel/signal.c:3036
arch_do_signal_or_restart+0x92/0x7d0 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+0x5f/0x110 kernel/entry/common.c:218
do_syscall_64+0x5c/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
The buggy address belongs to the object at ffff888107399200
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 8 bytes inside of
freed 192-byte region [ffff888107399200, ffff8881073992c0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107399
flags: 0x4000000000000000(zone=1)
page_type: f5(slab)
raw: 4000000000000000 ffff8881000413c0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 2, tgid 2 (kthreadd), ts 4026173575, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1db/0x200 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x47ee/0x4880 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x3c3/0x7d0 mm/page_alloc.c:4739
allocate_slab+0x76/0x420 mm/slub.c:2587
new_slab mm/slub.c:2640 [inline]
___slab_alloc+0x767/0xc00 mm/slub.c:3826
__slab_alloc+0x5d/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__kmalloc_cache_noprof+0x19c/0x2d0 mm/slub.c:4320
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
set_kthread_struct+0xbf/0x2d0 kernel/kthread.c:126
copy_process+0xd95/0x3070 kernel/fork.c:2331
kernel_clone+0x22a/0x890 kernel/fork.c:2815
kernel_thread+0x1bc/0x250 kernel/fork.c:2877
create_kthread kernel/kthread.c:487 [inline]
kthreadd+0x38f/0x4f0 kernel/kthread.c:847
ret_from_fork+0x51/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page_owner free stack trace missing
Memory state around the buggy address:
ffff888107399100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888107399180: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888107399200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888107399280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff888107399300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Warning: Permanently added '10.128.1.183' (ED25519) to the list of known hosts.
2025/02/22 07:15:11 ignoring optional flag "sandboxArg"="0"
2025/02/22 07:15:12 parsed 1 programs
[ 31.840040][ T30] audit: type=1400 audit(1740208512.691:66): avc: denied { node_bind } for pid=298 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1
[ 33.047525][ T30] audit: type=1400 audit(1740208513.901:67): avc: denied { mounton } for pid=308 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=1926 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1
[ 33.048863][ T308] cgroup: Unknown subsys name 'net'
[ 33.070408][ T30] audit: type=1400 audit(1740208513.901:68): avc: denied { mount } for pid=308 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1
[ 33.097412][ T30] audit: type=1400 audit(1740208513.931:69): avc: denied { unmount } for pid=308 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1
[ 33.097601][ T308] cgroup: Unknown subsys name 'devices'
[ 33.216113][ T308] cgroup: Unknown subsys name 'cpuset'
[ 33.222197][ T308] cgroup: Unknown subsys name 'hugetlb'
[ 33.228102][ T308] cgroup: Unknown subsys name 'rlimit'
[ 33.233475][ T308] cgroup: Unknown subsys name 'memory'
[ 33.347735][ T30] audit: type=1400 audit(1740208514.201:70): avc: denied { setattr } for pid=308 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=254 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1
[ 33.370850][ T30] audit: type=1400 audit(1740208514.201:71): avc: denied { create } for pid=308 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1
[ 33.371951][ T312] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped).
[ 33.391758][ T30] audit: type=1400 audit(1740208514.201:72): avc: denied { write } for pid=308 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1
[ 33.420347][ T30] audit: type=1400 audit(1740208514.201:73): avc: denied { read } for pid=308 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1
[ 33.440330][ T308] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 33.441004][ T30] audit: type=1400 audit(1740208514.201:74): avc: denied { module_request } for pid=308 comm="syz-executor" kmod="netdev-wpan0" scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:kernel_t tclass=system permissive=1
[ 33.471353][ T30] audit: type=1400 audit(1740208514.201:75): avc: denied { mounton } for pid=308 comm="syz-executor" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=dir permissive=1
[ 34.365492][ T319] request_module fs-gadgetfs succeeded, but still no fs?
[ 34.506754][ T318] syz-executor (318) used greatest stack depth: 21520 bytes left
[ 34.584417][ T329] ==================================================================
[ 34.592345][ T329] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[ 34.599996][ T329] Write of size 8 at addr ffff888107399208 by task syz-executor/329
[ 34.607916][ T329]
[ 34.610192][ T329] CPU: 1 UID: 0 PID: 329 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller-00267-gff202c5028a1 #0
[ 34.610218][ T329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[ 34.610235][ T329] Call Trace:
[ 34.610243][ T329]
[ 34.610252][ T329] dump_stack_lvl+0x184/0x200
[ 34.610276][ T329] ? __pfx_dump_stack_lvl+0x10/0x10
[ 34.610294][ T329] ? vprintk+0x1d/0x30
[ 34.610317][ T329] ? _printk+0xd1/0x120
[ 34.610339][ T329] print_report+0x163/0x570
[ 34.610358][ T329] ? __virt_addr_valid+0x2a4/0x380
[ 34.610386][ T329] ? kasan_complete_mode_report_info+0x71/0x210
[ 34.610413][ T329] kasan_report+0x15f/0x190
[ 34.610432][ T329] ? binder_add_device+0x5f/0xa0
[ 34.610461][ T329] ? binder_add_device+0x5f/0xa0
[ 34.610489][ T329] __asan_report_store8_noabort+0x17/0x20
[ 34.610516][ T329] binder_add_device+0x5f/0xa0
[ 34.610545][ T329] binderfs_binder_device_create+0x841/0xaa0
[ 34.610575][ T329] binderfs_fill_super+0x8fb/0xdd0
[ 34.610604][ T329] ? __pfx_binderfs_fill_super+0x10/0x10
[ 34.610636][ T329] ? shrinker_register+0x166/0x220
[ 34.610654][ T329] ? sget_fc+0x95b/0xa50
[ 34.610679][ T329] ? __pfx_set_anon_super_fc+0x10/0x10
[ 34.610710][ T329] get_tree_nodev+0xb9/0x160
[ 34.610737][ T329] ? __pfx_binderfs_fill_super+0x10/0x10
[ 34.610764][ T329] binderfs_fs_context_get_tree+0x1c/0x30
[ 34.610790][ T329] vfs_get_tree+0x8c/0x2c0
[ 34.610809][ T329] do_new_mount+0x2ba/0xb40
[ 34.610839][ T329] ? __pfx_do_new_mount+0x10/0x10
[ 34.610858][ T329] ? security_capable+0x7c/0x90
[ 34.610877][ T329] ? ns_capable+0x8a/0xf0
[ 34.610907][ T329] path_mount+0x67c/0x1000
[ 34.610928][ T329] __se_sys_mount+0x2c1/0x3b0
[ 34.610951][ T329] ? __pfx___se_sys_mount+0x10/0x10
[ 34.610975][ T329] __x64_sys_mount+0xbf/0xe0
[ 34.610995][ T329] x64_sys_call+0x2c9e/0x2df0
[ 34.611016][ T329] do_syscall_64+0x50/0x110
[ 34.611037][ T329] ? clear_bhb_loop+0x35/0x90
[ 34.611061][ T329] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 34.611091][ T329] RIP: 0033:0x7fd418d8e90a
[ 34.611116][ T329] 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
[ 34.611132][ T329] RSP: 002b:00007ffd3a90f458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 34.611157][ T329] RAX: ffffffffffffffda RBX: 00007fd418e0e663 RCX: 00007fd418d8e90a
[ 34.611172][ T329] RDX: 00007fd418e1dda7 RSI: 00007fd418e0e663 RDI: 00007fd418e1dda7
[ 34.611186][ T329] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 34.611198][ T329] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd418e28480
[ 34.611210][ T329] R13: 00007ffd3a90f4d8 R14: 0000000000000009 R15: 0000000000000000
[ 34.611226][ T329]
[ 34.611233][ T329]
[ 34.879549][ T329] Allocated by task 319:
[ 34.883618][ T329] kasan_save_track+0x3b/0x70
[ 34.888131][ T329] kasan_save_alloc_info+0x38/0x50
[ 34.893210][ T329] __kasan_kmalloc+0x99/0xb0
[ 34.897605][ T329] __kmalloc_cache_noprof+0x15f/0x2d0
[ 34.902826][ T329] binderfs_binder_device_create+0x159/0xaa0
[ 34.908631][ T329] binderfs_fill_super+0x8fb/0xdd0
[ 34.913586][ T329] get_tree_nodev+0xb9/0x160
[ 34.918112][ T329] binderfs_fs_context_get_tree+0x1c/0x30
[ 34.923668][ T329] vfs_get_tree+0x8c/0x2c0
[ 34.928051][ T329] do_new_mount+0x2ba/0xb40
[ 34.932355][ T329] path_mount+0x67c/0x1000
[ 34.936717][ T329] __se_sys_mount+0x2c1/0x3b0
[ 34.941227][ T329] __x64_sys_mount+0xbf/0xe0
[ 34.945690][ T329] x64_sys_call+0x2c9e/0x2df0
[ 34.950158][ T329] do_syscall_64+0x50/0x110
[ 34.954505][ T329] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 34.960228][ T329]
[ 34.962394][ T329] Freed by task 319:
[ 34.966152][ T329] kasan_save_track+0x3b/0x70
[ 34.970647][ T329] kasan_save_free_info+0x40/0x50
[ 34.975690][ T329] __kasan_slab_free+0x53/0x70
[ 34.980302][ T329] kfree+0x13b/0x350
[ 34.984034][ T329] binderfs_evict_inode+0x187/0x220
[ 34.989061][ T329] evict+0x4a7/0x930
[ 34.992798][ T329] iput+0x5ff/0x920
[ 34.996441][ T329] dentry_unlink_inode+0x389/0x460
[ 35.001386][ T329] __dentry_kill+0x207/0x640
[ 35.005829][ T329] shrink_dentry_list+0x315/0x510
[ 35.010680][ T329] shrink_dcache_parent+0xce/0x340
[ 35.015625][ T329] do_one_tree+0x27/0xf0
[ 35.019791][ T329] shrink_dcache_for_umount+0xa3/0x140
[ 35.025078][ T329] generic_shutdown_super+0x69/0x300
[ 35.030198][ T329] kill_anon_super+0x46/0x1e0
[ 35.034751][ T329] kill_litter_super+0x56/0x60
[ 35.039312][ T329] binderfs_kill_super+0x41/0x60
[ 35.044102][ T329] deactivate_locked_super+0xd8/0x290
[ 35.049300][ T329] deactivate_super+0xc6/0xf0
[ 35.053822][ T329] cleanup_mnt+0x42d/0x4d0
[ 35.058060][ T329] __cleanup_mnt+0x19/0x20
[ 35.062512][ T329] task_work_run+0x252/0x2e0
[ 35.066942][ T329] do_exit+0xb39/0x2ab0
[ 35.071019][ T329] do_group_exit+0x21b/0x2d0
[ 35.075466][ T329] get_signal+0x1553/0x1690
[ 35.079880][ T329] arch_do_signal_or_restart+0x92/0x7d0
[ 35.085253][ T329] syscall_exit_to_user_mode+0x5f/0x110
[ 35.090641][ T329] do_syscall_64+0x5c/0x110
[ 35.094971][ T329] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 35.100700][ T329]
[ 35.102894][ T329] The buggy address belongs to the object at ffff888107399200
[ 35.102894][ T329] which belongs to the cache kmalloc-192 of size 192
[ 35.116882][ T329] The buggy address is located 8 bytes inside of
[ 35.116882][ T329] freed 192-byte region [ffff888107399200, ffff8881073992c0)
[ 35.130702][ T329]
[ 35.132866][ T329] The buggy address belongs to the physical page:
[ 35.139285][ T329] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107399
[ 35.147953][ T329] flags: 0x4000000000000000(zone=1)
[ 35.152977][ T329] page_type: f5(slab)
[ 35.156825][ T329] raw: 4000000000000000 ffff8881000413c0 dead000000000100 dead000000000122
[ 35.165230][ T329] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[ 35.173781][ T329] page dumped because: kasan: bad access detected
[ 35.180137][ T329] page_owner tracks the page as allocated
[ 35.185753][ T329] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 2, tgid 2 (kthreadd), ts 4026173575, free_ts 0
[ 35.203226][ T329] post_alloc_hook+0x1db/0x200
[ 35.207824][ T329] get_page_from_freelist+0x47ee/0x4880
[ 35.213292][ T329] __alloc_frozen_pages_noprof+0x3c3/0x7d0
[ 35.219027][ T329] allocate_slab+0x76/0x420
[ 35.223372][ T329] ___slab_alloc+0x767/0xc00
[ 35.227800][ T329] __slab_alloc+0x5d/0xb0
[ 35.231963][ T329] __kmalloc_cache_noprof+0x19c/0x2d0
[ 35.237280][ T329] set_kthread_struct+0xbf/0x2d0
[ 35.242054][ T329] copy_process+0xd95/0x3070
[ 35.246480][ T329] kernel_clone+0x22a/0x890
[ 35.250820][ T329] kernel_thread+0x1bc/0x250
[ 35.255649][ T329] kthreadd+0x38f/0x4f0
[ 35.259578][ T329] ret_from_fork+0x51/0x80
[ 35.263849][ T329] ret_from_fork_asm+0x1a/0x30
[ 35.268646][ T329] page_owner free stack trace missing
[ 35.273926][ T329]
[ 35.276092][ T329] Memory state around the buggy address:
[ 35.281572][ T329] ffff888107399100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 35.289647][ T329] ffff888107399180: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 35.297850][ T329] >ffff888107399200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.305740][ T329] ^
[ 35.309903][ T329] ffff888107399280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 35.317818][ T329] ffff888107399300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.325914][ T329] ==================================================================
[ 35.334393][ T329] Disabling lock debugging due to kernel taint
[ 35.822326][ T361] bridge0: port 1(bridge_slave_0) entered blocking state
[ 35.832328][ T361] bridge0: port 1(bridge_slave_0) entered disabled state
[ 35.839490][ T361] bridge_slave_0: entered allmulticast mode
[ 35.845977][ T361] bridge_slave_0: entered promiscuous mode
[ 35.858841][ T361] bridge0: port 2(bridge_slave_1) entered blocking state
[ 35.865783][ T361] bridge0: port 2(bridge_slave_1) entered disabled state
[ 35.872617][ T361] bridge_slave_1: entered allmulticast mode
[ 35.879485][ T361] bridge_slave_1: entered promiscuous mode
[ 35.966758][ T361] bridge0: port 2(bridge_slave_1) entered blocking state
[ 35.973631][ T361] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 35.980793][ T361] bridge0: port 1(bridge_slave_0) entered blocking state
[ 35.987872][ T361] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 36.010276][ T12] bridge0: port 1(bridge_slave_0) entered disabled state
[ 36.017484][ T12] bridge0: port 2(bridge_slave_1) entered disabled state
[ 36.027600][ T39] bridge0: port 1(bridge_slave_0) entered blocking state
[ 36.034455][ T39] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 36.043302][ T39] bridge0: port 2(bridge_slave_1) entered blocking state
[ 36.050170][ T39] bridge0: port 2(bridge_slave_1) entered forwarding state
2025/02/22 07:15:16 executed programs: 0
[ 36.076155][ T361] veth0_vlan: entered promiscuous mode
[ 36.087270][ T361] veth1_macvtap: entered promiscuous mode
[ 36.178367][ T378] bridge0: port 1(bridge_slave_0) entered blocking state
[ 36.185353][ T378] bridge0: port 1(bridge_slave_0) entered disabled state
[ 36.192248][ T378] bridge_slave_0: entered allmulticast mode
[ 36.198547][ T378] bridge_slave_0: entered promiscuous mode
[ 36.205117][ T378] bridge0: port 2(bridge_slave_1) entered blocking state
[ 36.211975][ T378] bridge0: port 2(bridge_slave_1) entered disabled state
[ 36.219205][ T378] bridge_slave_1: entered allmulticast mode
[ 36.225650][ T378] bridge_slave_1: entered promiscuous mode
[ 36.279566][ T378] bridge0: port 2(bridge_slave_1) entered blocking state
[ 36.286445][ T378] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 36.293524][ T378] bridge0: port 1(bridge_slave_0) entered blocking state
[ 36.300347][ T378] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 36.323005][ T39] bridge0: port 1(bridge_slave_0) entered disabled state
[ 36.330215][ T39] bridge0: port 2(bridge_slave_1) entered disabled state
[ 36.339985][ T12] bridge0: port 1(bridge_slave_0) entered blocking state
[ 36.346887][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 36.356330][ T12] bridge0: port 2(bridge_slave_1) entered blocking state
[ 36.363407][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 36.388456][ T378] veth0_vlan: entered promiscuous mode
[ 36.399987][ T378] veth1_macvtap: entered promiscuous mode
[ 36.496011][ T361] syz-executor (361) used greatest stack depth: 19768 bytes left
[ 36.507368][ T39] bridge_slave_1: left allmulticast mode
[ 36.513004][ T39] bridge_slave_1: left promiscuous mode
[ 36.534893][ T39] bridge0: port 2(bridge_slave_1) entered disabled state
[ 36.554975][ T39] bridge_slave_0: left allmulticast mode
[ 36.560466][ T39] bridge_slave_0: left promiscuous mode
[ 36.575937][ T39] bridge0: port 1(bridge_slave_0) entered disabled state
syzkaller build log:
go env (err=)
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/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/syzkaller/jobs/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.6.linux-amd64'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/syzkaller/jobs/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.6.linux-amd64/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.23.6'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/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-build662586418=/tmp/go-build -gno-record-gcc-switches'
git status (err=)
HEAD detached at d34966d146
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
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=d34966d146f584d390b49f213d1fccd59548dc6d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250221-172117'" -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 -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d34966d146f584d390b49f213d1fccd59548dc6d\"
/usr/bin/ld: /tmp/cc8cpxZx.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