KASAN: slab-use-after-free Read in __sock_queue_rcv

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KASAN: slab-use-after-free Read in __sock_queue_rcv_skb bluetooth	7	327d	334d	0/28	auto-obsoleted due to no activity on 2024/10/09 10:28
linux-6.1	KASAN: use-after-free Read in __sock_queue_rcv_skb	4	306d	353d	0/3	auto-obsoleted due to no activity on 2024/10/31 03:14
linux-5.15	KASAN: use-after-free Read in __sock_queue_rcv_skb	1	185d	185d	0/3	auto-obsoleted due to no activity on 2025/02/28 09:53
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in sock_flag include/net/sock.h:993 [inline]
BUG: KASAN: slab-use-after-free in __sock_queue_rcv_skb+0x5d4/0x9a0 net/core/sock.c:515
Read of size 8 at addr ffff888030c31060 by task syz.4.17/5983

CPU: 0 UID: 0 PID: 5983 Comm: syz.4.17 Not tainted 6.13.0-syzkaller-09740-g09717c28b76c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 sock_flag include/net/sock.h:993 [inline]
 __sock_queue_rcv_skb+0x5d4/0x9a0 net/core/sock.c:515
 sock_queue_rcv_skb_reason+0x76/0xf0 net/core/sock.c:532
 sock_queue_rcv_skb include/net/sock.h:2402 [inline]
 mgmt_cmd_status+0x28d/0x4d0 net/bluetooth/mgmt_util.c:156
 cmd_status_rsp net/bluetooth/mgmt.c:1458 [inline]
 cmd_complete_rsp+0x114/0x180 net/bluetooth/mgmt.c:1478
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
 __mgmt_power_off+0x183/0x430 net/bluetooth/mgmt.c:9463
 hci_dev_close_sync+0x6c4/0x11c0 net/bluetooth/hci_sync.c:5193
 hci_dev_do_close net/bluetooth/hci_core.c:482 [inline]
 hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:507
 sock_do_ioctl+0x158/0x460 net/socket.c:1194
 sock_ioctl+0x626/0x8e0 net/socket.c:1313
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f374db8cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f374e92a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f374dda6080 RCX: 00007f374db8cde9
RDX: 0000000000000000 RSI: 00000000400448ca RDI: 000000000000000b
RBP: 00007f374dc0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f374dda6080 R15: 00007ffd9b4dd858
 </TASK>

Allocated by task 5947:
 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+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4294 [inline]
 __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 sk_prot_alloc+0xe0/0x210 net/core/sock.c:2181
 sk_alloc+0x38/0x370 net/core/sock.c:2234
 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148
 hci_sock_create+0xa1/0x190 net/bluetooth/hci_sock.c:2202
 bt_sock_create+0x161/0x230 net/bluetooth/af_bluetooth.c:132
 __sock_create+0x4c0/0xa30 net/socket.c:1543
 sock_create net/socket.c:1601 [inline]
 __sys_socket_create net/socket.c:1638 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1685
 __do_sys_socket net/socket.c:1699 [inline]
 __se_sys_socket net/socket.c:1697 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1697
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5985:
 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+0x59/0x70 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+0x196/0x430 mm/slub.c:4757
 sk_prot_free net/core/sock.c:2217 [inline]
 __sk_destruct+0x479/0x5f0 net/core/sock.c:2309
 sock_put include/net/sock.h:1913 [inline]
 mgmt_pending_free net/bluetooth/mgmt_util.c:307 [inline]
 mgmt_pending_remove+0x13e/0x1a0 net/bluetooth/mgmt_util.c:315
 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
 mgmt_index_removed+0x133/0x390 net/bluetooth/mgmt.c:9396
 hci_sock_bind+0xcce/0x1150 net/bluetooth/hci_sock.c:1307
 __sys_bind_socket net/socket.c:1812 [inline]
 __sys_bind+0x1e4/0x290 net/socket.c:1843
 __do_sys_bind net/socket.c:1848 [inline]
 __se_sys_bind net/socket.c:1846 [inline]
 __x64_sys_bind+0x7a/0x90 net/socket.c:1846
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888030c31000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 96 bytes inside of
 freed 2048-byte region [ffff888030c31000, ffff888030c31800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30c30
head: order:3 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 ffff88801ac42000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac42000 dead000000000122 0000000000000000
head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000c30c01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 5947, tgid 5945 (syz.1.9), ts 67742457739, free_ts 67704036414
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 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+0xc27/0x14a0 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]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0x2e6/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 sk_prot_alloc+0xe0/0x210 net/core/sock.c:2181
 sk_alloc+0x38/0x370 net/core/sock.c:2234
 __netlink_create+0x65/0x260 net/netlink/af_netlink.c:629
 netlink_create+0x3ab/0x560 net/netlink/af_netlink.c:687
 __sock_create+0x4c0/0xa30 net/socket.c:1543
 sock_create net/socket.c:1601 [inline]
 __sys_socket_create net/socket.c:1638 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1685
 __do_sys_socket net/socket.c:1699 [inline]
 __se_sys_socket net/socket.c:1697 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1697
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 11 tgid 11 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 discard_slab mm/slub.c:2684 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3153
 put_cpu_partial+0x17c/0x250 mm/slub.c:3228
 __slab_free+0x290/0x380 mm/slub.c:4479
 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+0x23/0x80 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_node_noprof+0x1d9/0x380 mm/slub.c:4216
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1331 [inline]
 alloc_skb_with_frags+0xc3/0x820 net/core/skbuff.c:6612
 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2897
 sock_alloc_send_skb include/net/sock.h:1804 [inline]
 mld_newpack+0x1c3/0xaf0 net/ipv6/mcast.c:1790
 add_grhead net/ipv6/mcast.c:1893 [inline]
 add_grec+0x1492/0x19a0 net/ipv6/mcast.c:2031
 mld_send_initial_cr+0x228/0x4b0 net/ipv6/mcast.c:2277
 ipv6_mc_dad_complete+0x88/0x490 net/ipv6/mcast.c:2288
 addrconf_dad_completed+0x712/0xcd0 net/ipv6/addrconf.c:4336

Memory state around the buggy address:
 ffff888030c30f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888030c30f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888030c31000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888030c31080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888030c31100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================