[v5.15] KASAN: use-after-free Read in __sock_queue_rcv_skb
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syzbot
Nov 20, 2024, 4:52:34 AM11/20/24
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 0a51d2d4527b Linux 5.15.173
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16e546c0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f63d146f1af4415a
dashboard link: https://syzkaller.appspot.com/bug?extid=e3de6a6edf6a41020a26
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/733a95526889/disk-0a51d2d4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/409603e5dc40/vmlinux-0a51d2d4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2d60efa369ee/bzImage-0a51d2d4.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e3de6a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff888063e171cc by task kworker/u5:3/4174
CPU: 0 PID: 4174 Comm: kworker/u5:3 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: hci4 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline]
_raw_spin_lock_irqsave+0xdd/0x120 kernel/locking/spinlock.c:162
__sock_queue_rcv_skb+0x3e4/0x960 net/core/sock.c:481
l2cap_sock_recv_cb+0xfe/0x1e0 net/bluetooth/l2cap_sock.c:1516
l2cap_conless_channel net/bluetooth/l2cap_core.c:7769 [inline]
l2cap_recv_frame+0x1299/0x8ae0 net/bluetooth/l2cap_core.c:7823
hci_acldata_packet net/bluetooth/hci_core.c:4969 [inline]
hci_rx_work+0x48f/0x990 net/bluetooth/hci_core.c:5160
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 5832:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc+0x168/0x300 mm/slub.c:4407
kmalloc include/linux/slab.h:596 [inline]
sk_prot_alloc+0xe0/0x200 net/core/sock.c:1863
sk_alloc+0x35/0x310 net/core/sock.c:1916
l2cap_sock_alloc+0x34/0x1d0 net/bluetooth/l2cap_sock.c:1861
l2cap_sock_create+0x10d/0x1c0 net/bluetooth/l2cap_sock.c:1907
bt_sock_create+0x159/0x220 net/bluetooth/af_bluetooth.c:130
__sock_create+0x460/0x8f0 net/socket.c:1486
sock_create net/socket.c:1542 [inline]
__sys_socket+0x132/0x370 net/socket.c:1584
__do_sys_socket net/socket.c:1593 [inline]
__se_sys_socket net/socket.c:1591 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1591
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 5831:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
sk_prot_free net/core/sock.c:1899 [inline]
__sk_destruct+0x58e/0x840 net/core/sock.c:1985
l2cap_sock_release+0x157/0x1d0 net/bluetooth/l2cap_sock.c:1429
__sock_release net/socket.c:649 [inline]
sock_close+0xcd/0x230 net/socket.c:1336
__fput+0x3fe/0x8e0 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff888063e17000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 460 bytes inside of
2048-byte region [ffff888063e17000, ffff888063e17800)
The buggy address belongs to the page:
page:ffffea00018f8400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x63e10
head:ffffea00018f8400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888017042000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4171, ts 61337472948, free_ts 19443433346
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
__alloc_pages+0x272/0x700 mm/page_alloc.c:5464
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
__kmalloc_track_caller+0x1c7/0x300 mm/slub.c:4925
kmemdup+0x21/0x50 mm/util.c:128
neigh_sysctl_register+0xb0/0x530 net/core/neighbour.c:3647
devinet_sysctl_register+0x9d/0x1a0 net/ipv4/devinet.c:2640
inetdev_init+0x282/0x4a0 net/ipv4/devinet.c:277
inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1543
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2044
register_netdevice+0x12e8/0x1720 net/core/dev.c:10396
virt_wifi_newlink+0x3e1/0x7f0 drivers/net/wireless/virt_wifi.c:567
__rtnl_newlink net/core/rtnetlink.c:3521 [inline]
rtnl_newlink+0x14e1/0x2070 net/core/rtnetlink.c:3569
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5647
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_contig_range+0x95/0xf0 mm/page_alloc.c:9383
destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
do_one_initcall+0x22b/0x7a0 init/main.c:1302
do_initcall_level+0x157/0x210 init/main.c:1375
do_initcalls+0x49/0x90 init/main.c:1391
kernel_init_freeable+0x425/0x5c0 init/main.c:1615
kernel_init+0x19/0x290 init/main.c:1506
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Memory state around the buggy address:
ffff888063e17080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888063e17100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888063e17180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888063e17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888063e17280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 0a51d2d4527b Linux 5.15.173
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16e546c0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f63d146f1af4415a
dashboard link: https://syzkaller.appspot.com/bug?extid=e3de6a6edf6a41020a26
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/733a95526889/disk-0a51d2d4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/409603e5dc40/vmlinux-0a51d2d4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2d60efa369ee/bzImage-0a51d2d4.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e3de6a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff888063e171cc by task kworker/u5:3/4174
CPU: 0 PID: 4174 Comm: kworker/u5:3 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: hci4 hci_rx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline]
_raw_spin_lock_irqsave+0xdd/0x120 kernel/locking/spinlock.c:162
__sock_queue_rcv_skb+0x3e4/0x960 net/core/sock.c:481
l2cap_sock_recv_cb+0xfe/0x1e0 net/bluetooth/l2cap_sock.c:1516
l2cap_conless_channel net/bluetooth/l2cap_core.c:7769 [inline]
l2cap_recv_frame+0x1299/0x8ae0 net/bluetooth/l2cap_core.c:7823
hci_acldata_packet net/bluetooth/hci_core.c:4969 [inline]
hci_rx_work+0x48f/0x990 net/bluetooth/hci_core.c:5160
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 5832:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc+0x168/0x300 mm/slub.c:4407
kmalloc include/linux/slab.h:596 [inline]
sk_prot_alloc+0xe0/0x200 net/core/sock.c:1863
sk_alloc+0x35/0x310 net/core/sock.c:1916
l2cap_sock_alloc+0x34/0x1d0 net/bluetooth/l2cap_sock.c:1861
l2cap_sock_create+0x10d/0x1c0 net/bluetooth/l2cap_sock.c:1907
bt_sock_create+0x159/0x220 net/bluetooth/af_bluetooth.c:130
__sock_create+0x460/0x8f0 net/socket.c:1486
sock_create net/socket.c:1542 [inline]
__sys_socket+0x132/0x370 net/socket.c:1584
__do_sys_socket net/socket.c:1593 [inline]
__se_sys_socket net/socket.c:1591 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1591
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 5831:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
sk_prot_free net/core/sock.c:1899 [inline]
__sk_destruct+0x58e/0x840 net/core/sock.c:1985
l2cap_sock_release+0x157/0x1d0 net/bluetooth/l2cap_sock.c:1429
__sock_release net/socket.c:649 [inline]
sock_close+0xcd/0x230 net/socket.c:1336
__fput+0x3fe/0x8e0 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff888063e17000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 460 bytes inside of
2048-byte region [ffff888063e17000, ffff888063e17800)
The buggy address belongs to the page:
page:ffffea00018f8400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x63e10
head:ffffea00018f8400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888017042000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4171, ts 61337472948, free_ts 19443433346
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192
__alloc_pages+0x272/0x700 mm/page_alloc.c:5464
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
__kmalloc_track_caller+0x1c7/0x300 mm/slub.c:4925
kmemdup+0x21/0x50 mm/util.c:128
neigh_sysctl_register+0xb0/0x530 net/core/neighbour.c:3647
devinet_sysctl_register+0x9d/0x1a0 net/ipv4/devinet.c:2640
inetdev_init+0x282/0x4a0 net/ipv4/devinet.c:277
inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1543
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2044
register_netdevice+0x12e8/0x1720 net/core/dev.c:10396
virt_wifi_newlink+0x3e1/0x7f0 drivers/net/wireless/virt_wifi.c:567
__rtnl_newlink net/core/rtnetlink.c:3521 [inline]
rtnl_newlink+0x14e1/0x2070 net/core/rtnetlink.c:3569
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5647
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_contig_range+0x95/0xf0 mm/page_alloc.c:9383
destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
do_one_initcall+0x22b/0x7a0 init/main.c:1302
do_initcall_level+0x157/0x210 init/main.c:1375
do_initcalls+0x49/0x90 init/main.c:1391
kernel_init_freeable+0x425/0x5c0 init/main.c:1615
kernel_init+0x19/0x290 init/main.c:1506
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Memory state around the buggy address:
ffff888063e17080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888063e17100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888063e17180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888063e17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888063e17280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Feb 28, 2025, 4:53:18 AM2/28/25
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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