==================================================================
BUG: KASAN: slab-out-of-bounds in __rhashtable_insert_fast include/linux/rhashtable.h:741 [inline]
BUG: KASAN: slab-out-of-bounds in rhashtable_insert_fast include/linux/rhashtable.h:834 [inline]
BUG: KASAN: slab-out-of-bounds in mac80211_hwsim_new_radio+0x4b81/0x54d0 drivers/net/wireless/virtual/mac80211_hwsim.c:5591
Read of size 8 at addr ffff88807c02b0b0 by task syz-executor/10418
CPU: 0 UID: 0 PID: 10418 Comm: syz-executor Not tainted 6.15.0-rc6-syzkaller-00346-g5723cc3450bc #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
__rhashtable_insert_fast include/linux/rhashtable.h:741 [inline]
rhashtable_insert_fast include/linux/rhashtable.h:834 [inline]
mac80211_hwsim_new_radio+0x4b81/0x54d0 drivers/net/wireless/virtual/mac80211_hwsim.c:5591
hwsim_new_radio_nl+0xb51/0x12c0 drivers/net/wireless/virtual/mac80211_hwsim.c:6243
genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x498/0x510 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42501907fc
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffc18488b90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f4250ee4620 RCX: 00007f42501907fc
RDX: 0000000000000024 RSI: 00007f4250ee4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc18488be4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f4250ee4670 R15: 0000000000000000
Allocated by task 36:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4346
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:599
__alloc_skb+0x166/0x380 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1340 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x2b1/0xcf0 drivers/net/netdevsim/dev.c:851
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 36:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b6/0x4d0 mm/slub.c:4841
skb_kfree_head net/core/skbuff.c:1058 [inline]
skb_free_head+0x108/0x1d0 net/core/skbuff.c:1070
skb_release_data+0x7a5/0x960 net/core/skbuff.c:1097
skb_release_all net/core/skbuff.c:1162 [inline]
__kfree_skb net/core/skbuff.c:1176 [inline]
consume_skb net/core/skbuff.c:1408 [inline]
consume_skb+0xbf/0x100 net/core/skbuff.c:1402
nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
nsim_dev_trap_report_work+0x8bd/0xcf0 drivers/net/netdevsim/dev.c:851
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88807c02a000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 176 bytes to the right of
allocated 4096-byte region [ffff88807c02a000, ffff88807c02b000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c028
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 ffff88801b442140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b442140 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001f00a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 36, tgid 36 (kworker/u8:2), ts 742363181667, free_ts 742221384347
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1714
prep_new_page mm/page_alloc.c:1722 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3684
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4966
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x244/0x340 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_node_track_caller_noprof+0x2ee/0x510 mm/slub.c:4346
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:599
__alloc_skb+0x166/0x380 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1340 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x2b1/0xcf0 drivers/net/netdevsim/dev.c:851
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page last free pid 10539 tgid 10539 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1258 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2721
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_node_track_caller_noprof+0x1d3/0x510 mm/slub.c:4346
__kmemdup_nul mm/util.c:63 [inline]
kstrdup+0x53/0x100 mm/util.c:83
kstrdup_const+0x63/0x80 mm/util.c:103
kvasprintf_const+0x10f/0x1a0 lib/kasprintf.c:48
kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274
dev_set_name+0xc7/0x100 drivers/base/core.c:3495
netdev_register_kobject+0xc5/0x3a0 net/core/net-sysfs.c:2323
register_netdevice+0x13dc/0x2270 net/core/dev.c:10999
nsim_init_netdevsim drivers/net/netdevsim/netdev.c:960 [inline]
nsim_create+0xc70/0x10a0 drivers/net/netdevsim/netdev.c:1028
__nsim_dev_port_add+0x42b/0x7d0 drivers/net/netdevsim/dev.c:1393
nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1449 [inline]
nsim_drv_probe+0xdca/0x1490 drivers/net/netdevsim/dev.c:1607
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x241/0xa90 drivers/base/dd.c:657
Memory state around the buggy address:
ffff88807c02af80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807c02b000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807c02b080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88807c02b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807c02b180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 10418 Comm: syz-executor Tainted: G B 6.15.0-rc6-syzkaller-00346-g5723cc3450bc #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__rhashtable_insert_fast include/linux/rhashtable.h:741 [inline]
RIP: 0010:rhashtable_insert_fast include/linux/rhashtable.h:834 [inline]
RIP: 0010:mac80211_hwsim_new_radio+0x3740/0x54d0 drivers/net/wireless/virtual/mac80211_hwsim.c:5591
Code: 8b 6c 24 48 48 89 5c 24 70 48 8b 1c 24 4c 89 74 24 68 eb 3e e8 a1 6e c1 fa 4c 89 e0 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 <80> 3c 08 00 0f 85 2f 14 00 00 4d 8b 24 24 31 ff 45 89 e6 41 83 e6
RSP: 0018:ffffc900042df518 EFLAGS: 00010056
RAX: 0000000000000000 RBX: ffff88802547f000 RCX: dffffc0000000000
RDX: ffff88802a7d1e00 RSI: ffffffff86f9d69f RDI: 0000000000000005
RBP: 0000000000000011 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 6e696c6261736944 R12: 0000000000000000
R13: 000000000000000c R14: 0000000000000000 R15: ffff888066738e40
FS: 0000555572ad4500(0000) GS:ffff8881249e0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a5f3d200 CR3: 000000003b5b7000 CR4: 0000000000350ef0
Call Trace:
hwsim_new_radio_nl+0xb51/0x12c0 drivers/net/wireless/virtual/mac80211_hwsim.c:6243
genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x16d/0x440 net/netlink/af_netlink.c:2534
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x498/0x510 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42501907fc
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffc18488b90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f4250ee4620 RCX: 00007f42501907fc
RDX: 0000000000000024 RSI: 00007f4250ee4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc18488be4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f4250ee4670 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__rhashtable_insert_fast include/linux/rhashtable.h:741 [inline]
RIP: 0010:rhashtable_insert_fast include/linux/rhashtable.h:834 [inline]
RIP: 0010:mac80211_hwsim_new_radio+0x3740/0x54d0 drivers/net/wireless/virtual/mac80211_hwsim.c:5591
Code: 8b 6c 24 48 48 89 5c 24 70 48 8b 1c 24 4c 89 74 24 68 eb 3e e8 a1 6e c1 fa 4c 89 e0 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 <80> 3c 08 00 0f 85 2f 14 00 00 4d 8b 24 24 31 ff 45 89 e6 41 83 e6
RSP: 0018:ffffc900042df518 EFLAGS: 00010056
RAX: 0000000000000000 RBX: ffff88802547f000 RCX: dffffc0000000000
RDX: ffff88802a7d1e00 RSI: ffffffff86f9d69f RDI: 0000000000000005
RBP: 0000000000000011 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 6e696c6261736944 R12: 0000000000000000
R13: 000000000000000c R14: 0000000000000000 R15: ffff888066738e40
FS: 0000555572ad4500(0000) GS:ffff8881249e0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a5f3d200 CR3: 000000003b5b7000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 8b 6c 24 48 mov 0x48(%rsp),%ebp
4: 48 89 5c 24 70 mov %rbx,0x70(%rsp)
9: 48 8b 1c 24 mov (%rsp),%rbx
d: 4c 89 74 24 68 mov %r14,0x68(%rsp)
12: eb 3e jmp 0x52
14: e8 a1 6e c1 fa call 0xfac16eba
19: 4c 89 e0 mov %r12,%rax
1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
23: fc ff df
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 0f 85 2f 14 00 00 jne 0x1463
34: 4d 8b 24 24 mov (%r12),%r12
38: 31 ff xor %edi,%edi
3a: 45 89 e6 mov %r12d,%r14d
3d: 41 rex.B
3e: 83 .byte 0x83
3f: e6 .byte 0xe6