==================================================================
BUG: KASAN: use-after-free in tcp_or_dccp_get_hashinfo include/net/inet_hashtables.h:186 [inline]
BUG: KASAN: use-after-free in reqsk_queue_unlink net/ipv4/inet_connection_sock.c:956 [inline]
BUG: KASAN: use-after-free in inet_csk_reqsk_queue_drop+0xf3/0x3b0 net/ipv4/inet_connection_sock.c:970
Read of size 8 at addr ffff888149a58500 by task udevd/3001
CPU: 0 PID: 3001 Comm: udevd Not tainted 6.1.82-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
<IRQ>
__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
tcp_or_dccp_get_hashinfo include/net/inet_hashtables.h:186 [inline]
reqsk_queue_unlink net/ipv4/inet_connection_sock.c:956 [inline]
inet_csk_reqsk_queue_drop+0xf3/0x3b0 net/ipv4/inet_connection_sock.c:970
inet_csk_reqsk_queue_drop_and_put net/ipv4/inet_connection_sock.c:982 [inline]
reqsk_timer_handler+0x90b/0xe70 net/ipv4/inet_connection_sock.c:1096
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xcf/0xa20 kernel/locking/lockdep.c:5673
Code: 0d 0f 86 c2 05 00 00 89 db 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 62 73 8e be 08 00 00 00 e8 e9 81 77 00 48 0f a3 1d 49 ea 08 0d <73> 0d e8 1a c4 08 00 84 c0 0f 84 c5 05 00 00 48 c7 c0 64 97 73 8e
RSP: 0018:ffffc9000c0c76c0 EFLAGS: 00000257
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816a7857
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e7362a8
RBP: ffffc9000c0c77f8 R08: dffffc0000000000 R09: fffffbfff1ce6c56
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001818ee4
R13: ffffffff8197a222 R14: 0000000000000000 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:324 [inline]
rcu_read_unlock include/linux/rcupdate.h:793 [inline]
is_bpf_text_address+0x289/0x2a0 kernel/bpf/core.c:733
kernel_text_address+0x9f/0xd0 kernel/extable.c:125
__kernel_text_address+0x9/0x40 kernel/extable.c:79
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
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
getname_flags+0xb8/0x4f0 fs/namei.c:139
vfs_fstatat fs/stat.c:266 [inline]
__do_sys_newfstatat fs/stat.c:437 [inline]
__se_sys_newfstatat fs/stat.c:431 [inline]
__x64_sys_newfstatat+0x130/0x1e0 fs/stat.c:431
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4385f165f4
Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffc2455af88 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005653bea81a50 RCX: 00007f4385f165f4
RDX: 00007ffc2455af98 RSI: 00007ffc2455b428 RDI: 00000000ffffff9c
RBP: 00007ffc2455b028 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc2455b428
R13: 00007ffc2455af98 R14: 00005653bea5a910 R15: 0000000000000000
</TASK>
Allocated by task 3580:
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
kmem_cache_zalloc include/linux/slab.h:682 [inline]
net_alloc net/core/net_namespace.c:410 [inline]
copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:465
create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226
ksys_unshare+0x580/0xb20 kernel/fork.c:3203
__do_sys_unshare kernel/fork.c:3274 [inline]
__se_sys_unshare kernel/fork.c:3272 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3272
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
insert_work+0x54/0x3d0 kernel/workqueue.c:1361
__queue_work+0xb4b/0xf90 kernel/workqueue.c:1520
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1514 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1790
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
The buggy address belongs to the object at ffff888149a58000
which belongs to the cache net_namespace of size 6976
The buggy address is located 1280 bytes inside of
6976-byte region [ffff888149a58000, ffff888149a59b40)
The buggy address belongs to the physical page:
page:ffffea0005269600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888149a58000 pfn:0x149a58
head:ffffea0005269600 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8881753b5481
flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000010200 0000000000000000 dead000000000122 ffff888012638500
raw: ffff888149a58000 0000000080040002 00000001ffffffff ffff8881753b5481
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 3580, tgid 3580 (syz-executor.0), ts 195788378453, free_ts 21736827447
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5545
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
kmem_cache_zalloc include/linux/slab.h:682 [inline]
net_alloc net/core/net_namespace.c:410 [inline]
copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:465
create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226
ksys_unshare+0x580/0xb20 kernel/fork.c:3203
__do_sys_unshare kernel/fork.c:3274 [inline]
__se_sys_unshare kernel/fork.c:3272 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3272
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
free_pcp_prepare mm/page_alloc.c:1490 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
free_slab mm/slub.c:2031 [inline]
discard_slab mm/slub.c:2037 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
put_cpu_partial+0x17b/0x250 mm/slub.c:2662
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]
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
getname_flags+0xb8/0x4f0 fs/namei.c:139
vfs_fstatat fs/stat.c:266 [inline]
__do_sys_newfstatat fs/stat.c:437 [inline]
__se_sys_newfstatat fs/stat.c:431 [inline]
__x64_sys_newfstatat+0x130/0x1e0 fs/stat.c:431
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff888149a58400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888149a58480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888149a58500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888149a58580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888149a58600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 0d 0f 86 c2 05 or $0x5c2860f,%eax
5: 00 00 add %al,(%rax)
7: 89 db mov %ebx,%ebx
9: 48 89 d8 mov %rbx,%rax
c: 48 c1 e8 06 shr $0x6,%rax
10: 48 8d 3c c5 a8 62 73 lea -0x718c9d58(,%rax,8),%rdi
17: 8e
18: be 08 00 00 00 mov $0x8,%esi
1d: e8 e9 81 77 00 call 0x77820b
22: 48 0f a3 1d 49 ea 08 bt %rbx,0xd08ea49(%rip) # 0xd08ea73
29: 0d
* 2a: 73 0d jae 0x39 <-- trapping instruction
2c: e8 1a c4 08 00 call 0x8c44b
31: 84 c0 test %al,%al
33: 0f 84 c5 05 00 00 je 0x5fe
39: 48 c7 c0 64 97 73 8e mov $0xffffffff8e739764,%rax