mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
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BUG: KASAN: use-after-free in skb_dst_drop include/net/dst.h:267 [inline]
BUG: KASAN: use-after-free in skb_release_head_state+0x35/0x230 net/core/skbuff.c:840
Read of size 8 at addr ffff888076f17698 by task syz.1.720/6207
CPU: 1 PID: 6207 Comm: syz.1.720 Not tainted 6.1.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
skb_dst_drop include/net/dst.h:267 [inline]
skb_release_head_state+0x35/0x230 net/core/skbuff.c:840
skb_release_all net/core/skbuff.c:854 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
kfree_skb_reason+0x13d/0x390 net/core/skbuff.c:893
kfree_skb include/linux/skbuff.h:1220 [inline]
__hci_req_sync+0x626/0x940 net/bluetooth/hci_request.c:184
hci_req_sync+0xa5/0xc0 net/bluetooth/hci_request.c:206
hci_inquiry+0x443/0x860 net/bluetooth/hci_core.c:381
sock_do_ioctl+0x152/0x450 net/socket.c:1204
sock_ioctl+0x47f/0x770 net/socket.c:1321
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f68ecb799f9
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:00007f68ed98b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f68ecd15f80 RCX: 00007f68ecb799f9
RDX: 0000000020000000 RSI: 00000000800448f0 RDI: 000000000000000a
RBP: 00007f68ecbe78ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f68ecd15f80 R15: 00007ffc9d19c9a8
</TASK>
Allocated by task 3646:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
skb_clone+0x1e5/0x360 net/core/skbuff.c:1660
hci_send_cmd_sync net/bluetooth/hci_core.c:4146 [inline]
hci_cmd_work+0x296/0x660 net/bluetooth/hci_core.c:4166
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Freed by task 3656:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
kfree_skb include/linux/skbuff.h:1220 [inline]
hci_send_cmd_sync net/bluetooth/hci_core.c:4145 [inline]
hci_cmd_work+0x26b/0x660 net/bluetooth/hci_core.c:4166
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff888076f17640
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 88 bytes inside of
240-byte region [ffff888076f17640, ffff888076f17730)
The buggy address belongs to the physical page:
page:ffffea0001dbc5c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76f17
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00008a9dc0 dead000000000002 ffff888015a43500
raw: 0000000000000000 00000000000c000c 00000001ffffffff 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 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 3638, tgid 3638 (syz-executor), ts 67973160553, free_ts 67854664719
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517
prep_new_page mm/page_alloc.c:2524 [inline]
get_page_from_freelist+0x322e/0x33b0 mm/page_alloc.c:4290
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5558
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1a5/0x2d0 mm/slub.c:3422
skb_clone+0x1e5/0x360 net/core/skbuff.c:1660
__netlink_deliver_tap_skb net/netlink/af_netlink.c:300 [inline]
__netlink_deliver_tap+0x38d/0x770 net/netlink/af_netlink.c:325
netlink_deliver_tap+0x19d/0x1b0 net/netlink/af_netlink.c:338
netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
netlink_unicast+0x7aa/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
__sys_sendto+0x480/0x600 net/socket.c:2148
__do_sys_sendto net/socket.c:2160 [inline]
__se_sys_sendto net/socket.c:2156 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2156
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1444 [inline]
free_pcp_prepare mm/page_alloc.c:1494 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3369
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3464
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
__alloc_skb+0xde/0x670 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1271 [inline]
alloc_skb_with_frags+0xa4/0x740 net/core/skbuff.c:6168
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2747
sock_alloc_send_skb include/net/sock.h:1918 [inline]
mld_newpack+0x1c0/0xa90 net/ipv6/mcast.c:1748
add_grhead net/ipv6/mcast.c:1851 [inline]
add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1989
mld_send_initial_cr+0x20f/0x3a0 net/ipv6/mcast.c:2236
mld_dad_work+0x40/0x400 net/ipv6/mcast.c:2262
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
Memory state around the buggy address:
ffff888076f17580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff888076f17600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff888076f17680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888076f17700: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
ffff888076f17780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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