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 ffff88802ec9c808 by task syz-executor/5722
CPU: 1 UID: 0 PID: 5722 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__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:408 [inline]
print_report+0x16e/0x5b0 mm/kasan/report.c:521
kasan_report+0x143/0x180 mm/kasan/report.c:634
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: 0033:0x7f53c0d8e58a
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:00007ffcaec17e88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f53c0e0e663 RCX: 00007f53c0d8e58a
RDX: 00007f53c0e1dda7 RSI: 00007f53c0e0e663 RDI: 00007f53c0e1dda7
RBP: 00007f53c0e0e8ac R08: 0000000000000000 R09: 00000000000001ff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53c0deb1a8
R13: 00007f53c0deb180 R14: 0000000000000009 R15: 0000000000000000
Allocated by task 5715:
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 5715:
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 ffff88802ec9c800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
freed 512-byte region [ffff88802ec9c800, ffff88802ec9ca00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ec9c
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 ffff88801a041c80 ffffea00050dc800 dead000000000002
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a041c80 ffffea00050dc800 dead000000000002
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000bb2701 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 5078, tgid 5078 (udevadm), ts 33195408396, free_ts 33121166902
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 5078 tgid 5078 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
seq_open+0x5f/0x140 fs/seq_file.c:63
kernfs_fop_open+0x635/0xd10
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
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Memory state around the buggy address:
ffff88802ec9c700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88802ec9c780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802ec9c800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802ec9c880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802ec9c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Warning: Permanently added '10.128.0.253' (ED25519) to the list of known hosts.
2025/03/02 00:41:15 ignoring optional flag "sandboxArg"="0"
2025/03/02 00:41:16 parsed 1 programs
syzkaller login: [ 80.340256][ T5703] cgroup: Unknown subsys name 'net'
[ 80.487273][ T5703] cgroup: Unknown subsys name 'cpuset'
[ 80.496663][ T5703] cgroup: Unknown subsys name 'rlimit'
[ 80.502363][ T5703] cgroup: Unknown subsys name 'memory'
[ 81.959910][ T5703] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 85.421144][ T5722] ==================================================================
[ 85.429454][ T5722] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[ 85.437297][ T5722] Write of size 8 at addr ffff88802ec9c808 by task syz-executor/5722
[ 85.445875][ T5722]
[ 85.448440][ T5722] CPU: 1 UID: 0 PID: 5722 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller #0
[ 85.448466][ T5722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 85.448484][ T5722] Call Trace:
[ 85.448491][ T5722]
[ 85.448500][ T5722] dump_stack_lvl+0x241/0x360
[ 85.448529][ T5722] ? __pfx_dump_stack_lvl+0x10/0x10
[ 85.448552][ T5722] ? __pfx__printk+0x10/0x10
[ 85.448574][ T5722] ? _printk+0xd5/0x120
[ 85.448595][ T5722] ? __virt_addr_valid+0x183/0x530
[ 85.448620][ T5722] ? __virt_addr_valid+0x183/0x530
[ 85.448646][ T5722] print_report+0x16e/0x5b0
[ 85.448675][ T5722] ? __virt_addr_valid+0x183/0x530
[ 85.448699][ T5722] ? __virt_addr_valid+0x183/0x530
[ 85.448723][ T5722] ? __virt_addr_valid+0x45f/0x530
[ 85.448747][ T5722] ? __phys_addr+0xba/0x170
[ 85.448771][ T5722] ? binder_add_device+0x5f/0xa0
[ 85.448795][ T5722] kasan_report+0x143/0x180
[ 85.448825][ T5722] ? binder_add_device+0x5f/0xa0
[ 85.448851][ T5722] binder_add_device+0x5f/0xa0
[ 85.448874][ T5722] binderfs_binder_device_create+0x7bf/0x9c0
[ 85.448901][ T5722] binderfs_fill_super+0x944/0xd90
[ 85.448927][ T5722] ? __pfx_binderfs_fill_super+0x10/0x10
[ 85.448959][ T5722] ? shrinker_register+0x160/0x230
[ 85.448985][ T5722] ? sget_fc+0x909/0x9c0
[ 85.449015][ T5722] ? __pfx_set_anon_super_fc+0x10/0x10
[ 85.449035][ T5722] ? __pfx_binderfs_fill_super+0x10/0x10
[ 85.449056][ T5722] get_tree_nodev+0xb7/0x140
[ 85.449077][ T5722] vfs_get_tree+0x90/0x290
[ 85.449100][ T5722] do_new_mount+0x2be/0xb40
[ 85.449126][ T5722] ? __pfx_do_new_mount+0x10/0x10
[ 85.449154][ T5722] __se_sys_mount+0x2d6/0x3c0
[ 85.449179][ T5722] ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[ 85.449208][ T5722] ? __pfx___se_sys_mount+0x10/0x10
[ 85.449234][ T5722] ? __x64_sys_mount+0x20/0xc0
[ 85.449260][ T5722] do_syscall_64+0x82/0x160
[ 85.449282][ T5722] ? clear_bhb_loop+0x25/0x80
[ 85.449316][ T5722] ? clear_bhb_loop+0x25/0x80
[ 85.449345][ T5722] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 85.449373][ T5722] RIP: 0033:0x7f53c0d8e58a
[ 85.449405][ T5722] 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
[ 85.449422][ T5722] RSP: 002b:00007ffcaec17e88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 85.449444][ T5722] RAX: ffffffffffffffda RBX: 00007f53c0e0e663 RCX: 00007f53c0d8e58a
[ 85.449459][ T5722] RDX: 00007f53c0e1dda7 RSI: 00007f53c0e0e663 RDI: 00007f53c0e1dda7
[ 85.449474][ T5722] RBP: 00007f53c0e0e8ac R08: 0000000000000000 R09: 00000000000001ff
[ 85.449487][ T5722] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53c0deb1a8
[ 85.449499][ T5722] R13: 00007f53c0deb180 R14: 0000000000000009 R15: 0000000000000000
[ 85.449520][ T5722]
[ 85.449527][ T5722]
[ 85.728288][ T5722] Allocated by task 5715:
[ 85.732837][ T5722] kasan_save_track+0x3f/0x80
[ 85.738100][ T5722] __kasan_kmalloc+0x7d/0x90
[ 85.742914][ T5722] __kmalloc_cache_noprof+0x23e/0x360
[ 85.744186][ T5723] chnl_net:caif_netlink_parms(): no params data found
[ 85.748305][ T5722] binderfs_binder_device_create+0x16c/0x9c0
[ 85.748336][ T5722] binderfs_fill_super+0x944/0xd90
[ 85.748363][ T5722] get_tree_nodev+0xb7/0x140
[ 85.771451][ T5722] vfs_get_tree+0x90/0x290
[ 85.775915][ T5722] do_new_mount+0x2be/0xb40
[ 85.780472][ T5722] __se_sys_mount+0x2d6/0x3c0
[ 85.785193][ T5722] do_syscall_64+0x82/0x160
[ 85.790043][ T5722] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 85.796216][ T5722]
[ 85.798931][ T5722] Freed by task 5715:
[ 85.802945][ T5722] kasan_save_track+0x3f/0x80
[ 85.807850][ T5722] kasan_save_free_info+0x40/0x50
[ 85.813715][ T5722] __kasan_slab_free+0x36/0x50
[ 85.818696][ T5722] kfree+0x181/0x430
[ 85.823338][ T5722] evict+0x4e8/0x9a0
[ 85.827489][ T5722] __dentry_kill+0x200/0x610
[ 85.832138][ T5722] shrink_kill+0xa9/0x2c0
[ 85.837017][ T5722] shrink_dentry_list+0x2c0/0x5b0
[ 85.843035][ T5722] shrink_dcache_parent+0xcb/0x3b0
[ 85.848881][ T5722] do_one_tree+0x23/0xe0
[ 85.853503][ T5722] shrink_dcache_for_umount+0xb4/0x180
[ 85.859087][ T5722] generic_shutdown_super+0x6a/0x2d0
[ 85.864864][ T5722] kill_litter_super+0x76/0xb0
[ 85.869742][ T5722] binderfs_kill_super+0x44/0x90
[ 85.874790][ T5722] deactivate_locked_super+0xc4/0x120
[ 85.880372][ T5722] cleanup_mnt+0x41f/0x4b0
[ 85.884821][ T5722] task_work_run+0x24f/0x310
[ 85.889583][ T5722] do_exit+0xa2a/0x28d0
[ 85.893761][ T5722] do_group_exit+0x207/0x2c0
[ 85.898552][ T5722] get_signal+0x16a6/0x1740
[ 85.903161][ T5722] arch_do_signal_or_restart+0x96/0x830
[ 85.908907][ T5722] syscall_exit_to_user_mode+0xcd/0x330
[ 85.914558][ T5722] do_syscall_64+0x8e/0x160
[ 85.919360][ T5722] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 85.925266][ T5722]
[ 85.927699][ T5722] The buggy address belongs to the object at ffff88802ec9c800
[ 85.927699][ T5722] which belongs to the cache kmalloc-512 of size 512
[ 85.941934][ T5722] The buggy address is located 8 bytes inside of
[ 85.941934][ T5722] freed 512-byte region [ffff88802ec9c800, ffff88802ec9ca00)
[ 85.955841][ T5722]
[ 85.958185][ T5722] The buggy address belongs to the physical page:
[ 85.964877][ T5722] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ec9c
[ 85.973929][ T5722] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 85.982476][ T5722] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[ 85.990136][ T5722] page_type: f5(slab)
[ 85.994134][ T5722] raw: 00fff00000000040 ffff88801a041c80 ffffea00050dc800 dead000000000002
[ 86.002909][ T5722] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[ 86.012034][ T5722] head: 00fff00000000040 ffff88801a041c80 ffffea00050dc800 dead000000000002
[ 86.021290][ T5722] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[ 86.030085][ T5722] head: 00fff00000000002 ffffea0000bb2701 ffffffffffffffff 0000000000000000
[ 86.039051][ T5722] head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
[ 86.047828][ T5722] page dumped because: kasan: bad access detected
[ 86.055134][ T5722] page_owner tracks the page as allocated
[ 86.060953][ T5722] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5078, tgid 5078 (udevadm), ts 33195408396, free_ts 33121166902
[ 86.082427][ T5722] post_alloc_hook+0x1ec/0x220
[ 86.087293][ T5722] get_page_from_freelist+0x3607/0x3750
[ 86.092849][ T5722] __alloc_frozen_pages_noprof+0x256/0x690
[ 86.098761][ T5722] alloc_pages_mpol+0x311/0x660
[ 86.103753][ T5722] allocate_slab+0x8f/0x3a0
[ 86.108466][ T5722] ___slab_alloc+0xc35/0x14a0
[ 86.113272][ T5722] __slab_alloc+0x58/0xa0
[ 86.118004][ T5722] __kmalloc_cache_noprof+0x276/0x360
[ 86.123585][ T5722] kernfs_fop_open+0x3e0/0xd10
[ 86.128452][ T5722] do_dentry_open+0xdea/0x1960
[ 86.133230][ T5722] vfs_open+0x3b/0x370
[ 86.137318][ T5722] path_openat+0x2c7d/0x3590
[ 86.141926][ T5722] do_filp_open+0x27f/0x4e0
[ 86.146433][ T5722] do_sys_openat2+0x13e/0x1d0
[ 86.151316][ T5722] __x64_sys_openat+0x247/0x2a0
[ 86.156448][ T5722] do_syscall_64+0x82/0x160
[ 86.160977][ T5722] page last free pid 5078 tgid 5078 stack trace:
[ 86.167312][ T5722] free_frozen_pages+0xdf5/0x10b0
[ 86.172360][ T5722] __slab_free+0x2c2/0x380
[ 86.176812][ T5722] qlist_free_all+0x9a/0x140
[ 86.181443][ T5722] kasan_quarantine_reduce+0x14f/0x170
[ 86.187181][ T5722] __kasan_slab_alloc+0x23/0x60
[ 86.192176][ T5722] kmem_cache_alloc_noprof+0x1d4/0x340
[ 86.197646][ T5722] seq_open+0x5f/0x140
[ 86.201724][ T5722] kernfs_fop_open+0x635/0xd10
[ 86.206549][ T5722] do_dentry_open+0xdea/0x1960
[ 86.211420][ T5722] vfs_open+0x3b/0x370
[ 86.215510][ T5722] path_openat+0x2c7d/0x3590
[ 86.220110][ T5722] do_filp_open+0x27f/0x4e0
[ 86.224631][ T5722] do_sys_openat2+0x13e/0x1d0
[ 86.229782][ T5722] __x64_sys_openat+0x247/0x2a0
[ 86.234863][ T5722] do_syscall_64+0x82/0x160
[ 86.239388][ T5722] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 86.245645][ T5722]
[ 86.248070][ T5722] Memory state around the buggy address:
[ 86.253807][ T5722] ffff88802ec9c700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 86.262359][ T5722] ffff88802ec9c780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 86.270670][ T5722] >ffff88802ec9c800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 86.278926][ T5722] ^
[ 86.283534][ T5722] ffff88802ec9c880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 86.291775][ T5722] ffff88802ec9c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 86.300031][ T5722] ==================================================================
[ 86.311461][ T5722] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 86.318910][ T5722] CPU: 1 UID: 0 PID: 5722 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller #0
[ 86.328173][ T5722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 86.338578][ T5722] Call Trace:
[ 86.341911][ T5722]
[ 86.345025][ T5722] dump_stack_lvl+0x241/0x360
[ 86.349735][ T5722] ? __pfx_dump_stack_lvl+0x10/0x10
[ 86.355145][ T5722] ? __pfx__printk+0x10/0x10
[ 86.359802][ T5722] ? preempt_schedule+0xe1/0xf0
[ 86.364780][ T5722] ? vscnprintf+0x5d/0x90
[ 86.369165][ T5722] panic+0x349/0x880
[ 86.373121][ T5722] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 86.379465][ T5722] ? check_panic_on_warn+0x21/0xb0
[ 86.384947][ T5722] ? __pfx_panic+0x10/0x10
[ 86.389374][ T5722] ? _raw_spin_unlock_irqrestore+0x130/0x140
[ 86.395623][ T5722] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[ 86.402174][ T5722] ? print_report+0x519/0x5b0
[ 86.406891][ T5722] check_panic_on_warn+0x86/0xb0
[ 86.411855][ T5722] ? binder_add_device+0x5f/0xa0
[ 86.416819][ T5722] end_report+0x77/0x150
[ 86.421183][ T5722] kasan_report+0x154/0x180
[ 86.425699][ T5722] ? binder_add_device+0x5f/0xa0
[ 86.430822][ T5722] binder_add_device+0x5f/0xa0
[ 86.435970][ T5722] binderfs_binder_device_create+0x7bf/0x9c0
[ 86.442335][ T5722] binderfs_fill_super+0x944/0xd90
[ 86.447576][ T5722] ? __pfx_binderfs_fill_super+0x10/0x10
[ 86.453488][ T5722] ? shrinker_register+0x160/0x230
[ 86.458873][ T5722] ? sget_fc+0x909/0x9c0
[ 86.463135][ T5722] ? __pfx_set_anon_super_fc+0x10/0x10
[ 86.468788][ T5722] ? __pfx_binderfs_fill_super+0x10/0x10
[ 86.474738][ T5722] get_tree_nodev+0xb7/0x140
[ 86.479390][ T5722] vfs_get_tree+0x90/0x290
[ 86.483947][ T5722] do_new_mount+0x2be/0xb40
[ 86.488471][ T5722] ? __pfx_do_new_mount+0x10/0x10
[ 86.493507][ T5722] __se_sys_mount+0x2d6/0x3c0
[ 86.498210][ T5722] ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[ 86.504790][ T5722] ? __pfx___se_sys_mount+0x10/0x10
[ 86.510115][ T5722] ? __x64_sys_mount+0x20/0xc0
[ 86.515530][ T5722] do_syscall_64+0x82/0x160
[ 86.520164][ T5722] ? clear_bhb_loop+0x25/0x80
[ 86.524964][ T5722] ? clear_bhb_loop+0x25/0x80
[ 86.529971][ T5722] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 86.536188][ T5722] RIP: 0033:0x7f53c0d8e58a
[ 86.541089][ T5722] 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
[ 86.561808][ T5722] RSP: 002b:00007ffcaec17e88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 86.570336][ T5722] RAX: ffffffffffffffda RBX: 00007f53c0e0e663 RCX: 00007f53c0d8e58a
[ 86.578439][ T5722] RDX: 00007f53c0e1dda7 RSI: 00007f53c0e0e663 RDI: 00007f53c0e1dda7
[ 86.586513][ T5722] RBP: 00007f53c0e0e8ac R08: 0000000000000000 R09: 00000000000001ff
[ 86.594695][ T5722] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53c0deb1a8
[ 86.602957][ T5722] R13: 00007f53c0deb180 R14: 0000000000000009 R15: 0000000000000000
[ 86.611148][ T5722]
[ 86.614729][ T5722] Kernel Offset: disabled
[ 86.619106][ T5722] Rebooting in 86400 seconds..
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-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/syzkaller/jobs-2/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-2/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-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-build3215344390=/tmp/go-build -gno-record-gcc-switches'
git status (err=)
HEAD detached at 40a34ec9447
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=40a34ec944732a2502ee67d92cc8c023355dfad4 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250214-180829'" -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=\"40a34ec944732a2502ee67d92cc8c023355dfad4\"
/usr/bin/ld: /tmp/ccgkt1rE.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