KASAN: slab-use-after-free Write in binder_add_device
netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
==================================================================
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 ffff88802f24ec08 by task syz-executor/5720
CPU: 0 UID: 0 PID: 5720 Comm: syz-executor Not tainted 6.14.0-rc5-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: 0033:0x7f7ed138e84a
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:00007ffc185d92a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7ed140e663 RCX: 00007f7ed138e84a
RDX: 00007f7ed141dda7 RSI: 00007f7ed140e663 RDI: 00007f7ed141dda7
RBP: 00007f7ed140e8ac R08: 0000000000000000 R09: 00007ffc185d9350
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ed13eb1a8
R13: 00007f7ed13eb180 R14: 0000000000000009 R15: 0000000000000000
Allocated by task 5712:
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 5712:
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 ffff88802f24ec00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
freed 512-byte region [ffff88802f24ec00, ffff88802f24ee00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2f24c
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 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a041c80 dead000000000100 dead000000000122
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000bc9301 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 1, tgid 1 (swapper/0), ts 21179080123, free_ts 0
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]
snd_info_create_entry+0x5c/0x350 sound/core/info.c:666
snd_pcm_oss_proc_init sound/core/oss/pcm_oss.c:3063 [inline]
snd_pcm_oss_register_minor+0x625/0xbd0 sound/core/oss/pcm_oss.c:3151
snd_pcm_dev_register+0x5a5/0x7e0 sound/core/pcm.c:1085
__snd_device_register sound/core/device.c:149 [inline]
snd_device_register_all+0xc9/0x190 sound/core/device.c:197
snd_card_register+0x1f0/0x700 sound/core/init.c:895
snd_dummy_probe+0x107e/0x18a0 sound/drivers/dummy.c:1092
platform_probe+0x13a/0x1c0 drivers/base/platform.c:1404
really_probe+0x2b9/0xad0 drivers/base/dd.c:658
page_owner free stack trace missing
Memory state around the buggy address:
ffff88802f24eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88802f24eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802f24ec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802f24ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802f24ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Warning: Permanently added '10.128.0.64' (ED25519) to the list of known hosts.
2025/03/08 04:12:32 ignoring optional flag "sandboxArg"="0"
2025/03/08 04:12:33 parsed 1 programs
[ 77.990262][ T5705] cgroup: Unknown subsys name 'net'
[ 78.119527][ T5705] cgroup: Unknown subsys name 'cpuset'
[ 78.128507][ T5705] cgroup: Unknown subsys name 'rlimit'
[ 78.134475][ T5705] cgroup: Unknown subsys name 'memory'
[ 79.584623][ T5705] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 81.974050][ T5714] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 81.982911][ T5714] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 81.992830][ T5714] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 82.001148][ T5714] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 82.012603][ T5714] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3
[ 82.020349][ T5714] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 82.351806][ T5720] chnl_net:caif_netlink_parms(): no params data found
[ 82.449712][ T5720] bridge0: port 1(bridge_slave_0) entered blocking state
[ 82.457592][ T5720] bridge0: port 1(bridge_slave_0) entered disabled state
[ 82.464832][ T5720] bridge_slave_0: entered allmulticast mode
[ 82.472284][ T5720] bridge_slave_0: entered promiscuous mode
[ 82.481759][ T5720] bridge0: port 2(bridge_slave_1) entered blocking state
[ 82.489072][ T5720] bridge0: port 2(bridge_slave_1) entered disabled state
[ 82.496657][ T5720] bridge_slave_1: entered allmulticast mode
[ 82.503341][ T5720] bridge_slave_1: entered promiscuous mode
[ 82.531936][ T5720] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 82.543260][ T5720] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 82.573768][ T5720] team0: Port device team_slave_0 added
[ 82.581552][ T5720] team0: Port device team_slave_1 added
[ 82.603867][ T5720] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 82.610994][ T5720] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 82.637410][ T5720] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 82.650790][ T5720] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 82.658288][ T5720] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[ 82.684547][ T5720] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 82.719089][ T5720] hsr_slave_0: entered promiscuous mode
[ 82.725355][ T5720] hsr_slave_1: entered promiscuous mode
[ 82.831555][ T5720] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 82.842601][ T5720] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 82.852929][ T5720] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 82.862931][ T5720] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 82.888622][ T5720] bridge0: port 2(bridge_slave_1) entered blocking state
[ 82.895792][ T5720] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 82.903936][ T5720] bridge0: port 1(bridge_slave_0) entered blocking state
[ 82.911087][ T5720] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 82.961814][ T5720] 8021q: adding VLAN 0 to HW filter on device bond0
[ 82.980260][ T3371] bridge0: port 1(bridge_slave_0) entered disabled state
[ 82.989618][ T3371] bridge0: port 2(bridge_slave_1) entered disabled state
[ 83.007475][ T5720] 8021q: adding VLAN 0 to HW filter on device team0
[ 83.022881][ T12] bridge0: port 1(bridge_slave_0) entered blocking state
[ 83.030065][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 83.042985][ T3371] bridge0: port 2(bridge_slave_1) entered blocking state
[ 83.050115][ T3371] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 83.168777][ T5720] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 83.205786][ T5720] veth0_vlan: entered promiscuous mode
[ 83.217724][ T5720] veth1_vlan: entered promiscuous mode
[ 83.243825][ T5720] veth0_macvtap: entered promiscuous mode
[ 83.252543][ T5720] veth1_macvtap: entered promiscuous mode
[ 83.268048][ T5720] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 83.282461][ T5720] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 83.293291][ T5720] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.303611][ T5720] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.313120][ T5720] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.322633][ T5720] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 83.371063][ T5720] ==================================================================
[ 83.379178][ T5720] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[ 83.386915][ T5720] Write of size 8 at addr ffff88802f24ec08 by task syz-executor/5720
[ 83.395068][ T5720]
[ 83.397504][ T5720] CPU: 0 UID: 0 PID: 5720 Comm: syz-executor Not tainted 6.14.0-rc5-syzkaller #0
[ 83.397521][ T5720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 83.397534][ T5720] Call Trace:
[ 83.397540][ T5720]
[ 83.397548][ T5720] dump_stack_lvl+0x241/0x360
[ 83.397568][ T5720] ? __pfx_dump_stack_lvl+0x10/0x10
[ 83.397584][ T5720] ? __pfx__printk+0x10/0x10
[ 83.397601][ T5720] ? _printk+0xd5/0x120
[ 83.397615][ T5720] ? __virt_addr_valid+0x183/0x530
[ 83.397633][ T5720] ? __virt_addr_valid+0x183/0x530
[ 83.397652][ T5720] print_report+0x16e/0x5b0
[ 83.397674][ T5720] ? __virt_addr_valid+0x183/0x530
[ 83.397691][ T5720] ? __virt_addr_valid+0x183/0x530
[ 83.397708][ T5720] ? __virt_addr_valid+0x45f/0x530
[ 83.397725][ T5720] ? __phys_addr+0xba/0x170
[ 83.397750][ T5720] ? binder_add_device+0x5f/0xa0
[ 83.397768][ T5720] kasan_report+0x143/0x180
[ 83.397793][ T5720] ? binder_add_device+0x5f/0xa0
[ 83.397812][ T5720] binder_add_device+0x5f/0xa0
[ 83.397829][ T5720] binderfs_binder_device_create+0x7bf/0x9c0
[ 83.397849][ T5720] binderfs_fill_super+0x944/0xd90
[ 83.397867][ T5720] ? __pfx_binderfs_fill_super+0x10/0x10
[ 83.397891][ T5720] ? shrinker_register+0x160/0x230
[ 83.397910][ T5720] ? sget_fc+0x909/0x9c0
[ 83.397933][ T5720] ? __pfx_set_anon_super_fc+0x10/0x10
[ 83.397948][ T5720] ? __pfx_binderfs_fill_super+0x10/0x10
[ 83.397965][ T5720] get_tree_nodev+0xb7/0x140
[ 83.397980][ T5720] vfs_get_tree+0x90/0x290
[ 83.397997][ T5720] do_new_mount+0x2be/0xb40
[ 83.398017][ T5720] ? __pfx_do_new_mount+0x10/0x10
[ 83.398037][ T5720] __se_sys_mount+0x2d6/0x3c0
[ 83.398056][ T5720] ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[ 83.398076][ T5720] ? __pfx___se_sys_mount+0x10/0x10
[ 83.398096][ T5720] ? __x64_sys_mount+0x20/0xc0
[ 83.398114][ T5720] do_syscall_64+0x82/0x160
[ 83.398132][ T5720] ? clear_bhb_loop+0x25/0x80
[ 83.398153][ T5720] ? clear_bhb_loop+0x25/0x80
[ 83.398175][ T5720] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 83.398196][ T5720] RIP: 0033:0x7f7ed138e84a
[ 83.398213][ T5720] 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
[ 83.398225][ T5720] RSP: 002b:00007ffc185d92a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 83.398242][ T5720] RAX: ffffffffffffffda RBX: 00007f7ed140e663 RCX: 00007f7ed138e84a
[ 83.398253][ T5720] RDX: 00007f7ed141dda7 RSI: 00007f7ed140e663 RDI: 00007f7ed141dda7
[ 83.398263][ T5720] RBP: 00007f7ed140e8ac R08: 0000000000000000 R09: 00007ffc185d9350
[ 83.398273][ T5720] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ed13eb1a8
[ 83.398282][ T5720] R13: 00007f7ed13eb180 R14: 0000000000000009 R15: 0000000000000000
[ 83.398297][ T5720]
[ 83.398302][ T5720]
[ 83.670515][ T5720] Allocated by task 5712:
[ 83.674874][ T5720] kasan_save_track+0x3f/0x80
[ 83.679564][ T5720] __kasan_kmalloc+0x7d/0x90
[ 83.684160][ T5720] __kmalloc_cache_noprof+0x23e/0x360
[ 83.689577][ T5720] binderfs_binder_device_create+0x16c/0x9c0
[ 83.695585][ T5720] binderfs_fill_super+0x944/0xd90
[ 83.700706][ T5720] get_tree_nodev+0xb7/0x140
[ 83.705306][ T5720] vfs_get_tree+0x90/0x290
[ 83.709727][ T5720] do_new_mount+0x2be/0xb40
[ 83.714236][ T5720] __se_sys_mount+0x2d6/0x3c0
[ 83.718922][ T5720] do_syscall_64+0x82/0x160
[ 83.723437][ T5720] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 83.729341][ T5720]
[ 83.731664][ T5720] Freed by task 5712:
[ 83.735651][ T5720] kasan_save_track+0x3f/0x80
[ 83.740369][ T5720] kasan_save_free_info+0x40/0x50
[ 83.745415][ T5720] __kasan_slab_free+0x36/0x50
[ 83.750186][ T5720] kfree+0x181/0x430
[ 83.754084][ T5720] evict+0x4e8/0x9a0
[ 83.757980][ T5720] __dentry_kill+0x200/0x610
[ 83.762642][ T5720] shrink_kill+0xa9/0x2c0
[ 83.767002][ T5720] shrink_dentry_list+0x2c0/0x5b0
[ 83.772054][ T5720] shrink_dcache_parent+0xcb/0x3b0
[ 83.777180][ T5720] do_one_tree+0x23/0xe0
[ 83.781432][ T5720] shrink_dcache_for_umount+0xb4/0x180
[ 83.786907][ T5720] generic_shutdown_super+0x6a/0x2d0
[ 83.792202][ T5720] kill_litter_super+0x76/0xb0
[ 83.796974][ T5720] binderfs_kill_super+0x44/0x90
[ 83.801919][ T5720] deactivate_locked_super+0xc4/0x120
[ 83.807391][ T5720] cleanup_mnt+0x41f/0x4b0
[ 83.811816][ T5720] task_work_run+0x24f/0x310
[ 83.816423][ T5720] do_exit+0xa2a/0x28d0
[ 83.820614][ T5720] do_group_exit+0x207/0x2c0
[ 83.825215][ T5720] get_signal+0x16a6/0x1740
[ 83.829719][ T5720] arch_do_signal_or_restart+0x96/0x830
[ 83.835357][ T5720] syscall_exit_to_user_mode+0xcd/0x330
[ 83.840907][ T5720] do_syscall_64+0x8e/0x160
[ 83.845416][ T5720] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 83.851324][ T5720]
[ 83.853646][ T5720] The buggy address belongs to the object at ffff88802f24ec00
[ 83.853646][ T5720] which belongs to the cache kmalloc-512 of size 512
[ 83.867726][ T5720] The buggy address is located 8 bytes inside of
[ 83.867726][ T5720] freed 512-byte region [ffff88802f24ec00, ffff88802f24ee00)
[ 83.881349][ T5720]
[ 83.883677][ T5720] The buggy address belongs to the physical page:
[ 83.890275][ T5720] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2f24c
[ 83.899131][ T5720] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 83.907629][ T5720] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[ 83.915182][ T5720] page_type: f5(slab)
[ 83.919167][ T5720] raw: 00fff00000000040 ffff88801a041c80 dead000000000100 dead000000000122
[ 83.927756][ T5720] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[ 83.936346][ T5720] head: 00fff00000000040 ffff88801a041c80 dead000000000100 dead000000000122
[ 83.945018][ T5720] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[ 83.953696][ T5720] head: 00fff00000000002 ffffea0000bc9301 ffffffffffffffff 0000000000000000
[ 83.962366][ T5720] head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
[ 83.971034][ T5720] page dumped because: kasan: bad access detected
[ 83.977455][ T5720] page_owner tracks the page as allocated
[ 83.983165][ T5720] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 21179080123, free_ts 0
[ 84.002967][ T5720] post_alloc_hook+0x1ec/0x220
[ 84.007741][ T5720] get_page_from_freelist+0x3607/0x3750
[ 84.013293][ T5720] __alloc_frozen_pages_noprof+0x256/0x690
[ 84.019196][ T5720] alloc_pages_mpol+0x311/0x660
[ 84.024058][ T5720] allocate_slab+0x8f/0x3a0
[ 84.028567][ T5720] ___slab_alloc+0xc35/0x14a0
[ 84.033250][ T5720] __slab_alloc+0x58/0xa0
[ 84.037586][ T5720] __kmalloc_cache_noprof+0x276/0x360
[ 84.042960][ T5720] snd_info_create_entry+0x5c/0x350
[ 84.048161][ T5720] snd_pcm_oss_register_minor+0x625/0xbd0
[ 84.053889][ T5720] snd_pcm_dev_register+0x5a5/0x7e0
[ 84.059094][ T5720] snd_device_register_all+0xc9/0x190
[ 84.064472][ T5720] snd_card_register+0x1f0/0x700
[ 84.069415][ T5720] snd_dummy_probe+0x107e/0x18a0
[ 84.074363][ T5720] platform_probe+0x13a/0x1c0
[ 84.079048][ T5720] really_probe+0x2b9/0xad0
[ 84.083556][ T5720] page_owner free stack trace missing
[ 84.088923][ T5720]
[ 84.091257][ T5720] Memory state around the buggy address:
[ 84.096884][ T5720] ffff88802f24eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 84.104949][ T5720] ffff88802f24eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 84.113008][ T5720] >ffff88802f24ec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 84.121069][ T5720] ^
[ 84.125409][ T5720] ffff88802f24ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 84.133525][ T5720] ffff88802f24ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 84.141935][ T5720] ==================================================================
[ 84.163177][ T5720] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 84.170540][ T5720] CPU: 1 UID: 0 PID: 5720 Comm: syz-executor Not tainted 6.14.0-rc5-syzkaller #0
[ 84.179694][ T5720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 84.189785][ T5720] Call Trace:
[ 84.193105][ T5720]
[ 84.196067][ T5720] dump_stack_lvl+0x241/0x360
[ 84.200795][ T5720] ? __pfx_dump_stack_lvl+0x10/0x10
[ 84.206030][ T5720] ? __pfx__printk+0x10/0x10
[ 84.210651][ T5720] ? preempt_schedule+0xe1/0xf0
[ 84.215509][ T5720] ? vscnprintf+0x5d/0x90
[ 84.219856][ T5720] panic+0x349/0x880
[ 84.223773][ T5720] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 84.229951][ T5720] ? check_panic_on_warn+0x21/0xb0
[ 84.235078][ T5720] ? __pfx_panic+0x10/0x10
[ 84.239503][ T5720] ? _raw_spin_unlock_irqrestore+0x130/0x140
[ 84.245499][ T5720] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[ 84.251836][ T5720] ? print_report+0x519/0x5b0
[ 84.256563][ T5720] check_panic_on_warn+0x86/0xb0
[ 84.261529][ T5720] ? binder_add_device+0x5f/0xa0
[ 84.266486][ T5720] end_report+0x77/0x150
[ 84.270738][ T5720] kasan_report+0x154/0x180
[ 84.275248][ T5720] ? binder_add_device+0x5f/0xa0
[ 84.280197][ T5720] binder_add_device+0x5f/0xa0
[ 84.284980][ T5720] binderfs_binder_device_create+0x7bf/0x9c0
[ 84.291106][ T5720] binderfs_fill_super+0x944/0xd90
[ 84.296242][ T5720] ? __pfx_binderfs_fill_super+0x10/0x10
[ 84.302372][ T5720] ? shrinker_register+0x160/0x230
[ 84.307593][ T5720] ? sget_fc+0x909/0x9c0
[ 84.311857][ T5720] ? __pfx_set_anon_super_fc+0x10/0x10
[ 84.317329][ T5720] ? __pfx_binderfs_fill_super+0x10/0x10
[ 84.322984][ T5720] get_tree_nodev+0xb7/0x140
[ 84.327579][ T5720] vfs_get_tree+0x90/0x290
[ 84.331997][ T5720] do_new_mount+0x2be/0xb40
[ 84.336545][ T5720] ? __pfx_do_new_mount+0x10/0x10
[ 84.341613][ T5720] __se_sys_mount+0x2d6/0x3c0
[ 84.346306][ T5720] ? lockdep_hardirqs_on_prepare+0x43d/0x7a0
[ 84.352306][ T5720] ? __pfx___se_sys_mount+0x10/0x10
[ 84.357686][ T5720] ? __x64_sys_mount+0x20/0xc0
[ 84.362452][ T5720] do_syscall_64+0x82/0x160
[ 84.366959][ T5720] ? clear_bhb_loop+0x25/0x80
[ 84.371669][ T5720] ? clear_bhb_loop+0x25/0x80
[ 84.376401][ T5720] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 84.382345][ T5720] RIP: 0033:0x7f7ed138e84a
[ 84.386781][ T5720] 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
[ 84.406409][ T5720] RSP: 002b:00007ffc185d92a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 84.414913][ T5720] RAX: ffffffffffffffda RBX: 00007f7ed140e663 RCX: 00007f7ed138e84a
[ 84.422889][ T5720] RDX: 00007f7ed141dda7 RSI: 00007f7ed140e663 RDI: 00007f7ed141dda7
[ 84.430952][ T5720] RBP: 00007f7ed140e8ac R08: 0000000000000000 R09: 00007ffc185d9350
[ 84.438929][ T5720] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ed13eb1a8
[ 84.446914][ T5720] R13: 00007f7ed13eb180 R14: 0000000000000009 R15: 0000000000000000
[ 84.454908][ T5720]
[ 84.458262][ T5720] Kernel Offset: disabled
[ 84.462595][ T5720] 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-build2877046443=/tmp/go-build -gno-record-gcc-switches'
git status (err=)
HEAD detached at 0808a665bc7
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=0808a665bc75ab0845906bfeca0d12fb520ae6eb -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250220-164537'" -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=\"0808a665bc75ab0845906bfeca0d12fb520ae6eb\"
/usr/bin/ld: /tmp/cc4cWmmS.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