==================================================================
BUG: KASAN: slab-use-after-free in kmemdup_noprof+0x55/0x70 mm/util.c:140
Read of size 66 at addr ffff888054e73f80 by task syz.2.14992/10920

CPU: 0 UID: 0 PID: 10920 Comm: syz.2.14992 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
 kmemdup_noprof+0x55/0x70 mm/util.c:140
 kmemdup_noprof include/linux/fortify-string.h:763 [inline]
 ax25_send_frame+0x693/0x9f0 net/ax25/ax25_out.c:78
 rose_send_frame net/rose/rose_link.c:106 [inline]
 rose_transmit_restart_request net/rose/rose_link.c:198 [inline]
 rose_t0timer_expiry+0x255/0x560 net/rose/rose_link.c:83
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:memset_orig+0x30/0xb0 arch/x86/lib/memset_64.S:68
Code: ce 48 b8 01 01 01 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 74 48 89 d1 48 c1 e9 06 74 39 66 0f 1f 84 00 00 00 00 00 <48> ff c9 48 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20
RSP: 0018:ffffc9000ff97148 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000dc0 RCX: 0000000000000007
RDX: 0000000000000200 RSI: 0000000000000000 RDI: ffffc9000ff97190
RBP: ffffc9000ff97378 R08: ffffffff8223cf2a R09: 0000000000000000
R10: ffffc9000ff97150 R11: ffffed1004aa0028 R12: ffffffff826f3f29
R13: ffff8880a07b23c0 R14: ffff8880a07b2470 R15: ffffc9000ff97150
 kasan_save_stack mm/kasan/common.c:54 [inline]
 kasan_save_track+0x2f/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4515 [inline]
 slab_alloc_node mm/slub.c:4844 [inline]
 kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4851
 __kernfs_new_node+0xe9/0x8e0 fs/kernfs/dir.c:637
 kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:718
 __kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1057
 sysfs_add_file_mode_ns+0x238/0x300 fs/sysfs/file.c:313
 create_files fs/sysfs/group.c:82 [inline]
 internal_create_group+0x673/0x1180 fs/sysfs/group.c:189
 internal_create_groups fs/sysfs/group.c:229 [inline]
 sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:255
 setup_port drivers/infiniband/core/sysfs.c:1202 [inline]
 ib_setup_port_attrs+0xf9c/0x2380 drivers/infiniband/core/sysfs.c:1388
 add_one_compat_dev+0x448/0x650 drivers/infiniband/core/device.c:977
 rdma_dev_init_net+0x243/0x2f0 drivers/infiniband/core/device.c:1193
 ops_init+0x35c/0x5c0 net/core/net_namespace.c:137
 setup_net+0x118/0x340 net/core/net_namespace.c:446
 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:581
 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:130
 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:226
 ksys_unshare+0x51d/0x930 kernel/fork.c:3174
 __do_sys_unshare kernel/fork.c:3245 [inline]
 __se_sys_unshare kernel/fork.c:3243 [inline]
 __x64_sys_unshare+0x38/0x50 kernel/fork.c:3243
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f913779c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91359f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f9137a16090 RCX: 00007f913779c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f9137832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9137a16128 R14: 00007f9137a16090 R15: 00007fff4c2f4438
 </TASK>

Allocated by task 7598:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5358
 kmalloc_noprof include/linux/slab.h:950 [inline]
 rose_add_node+0x471/0xf00 net/rose/rose_route.c:109
 rose_rt_ioctl+0xd35/0x12a0 net/rose/rose_route.c:748
 rose_ioctl+0x3fb/0x8f0 net/rose/af_rose.c:1382
 sock_do_ioctl+0x101/0x320 net/socket.c:1253
 sock_ioctl+0x5c6/0x7f0 net/socket.c:1374
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 10930:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2692 [inline]
 slab_free mm/slub.c:6143 [inline]
 kfree+0x1c1/0x630 mm/slub.c:6461
 rose_neigh_put include/net/rose.h:165 [inline]
 rose_timer_expiry+0x4c3/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697

The buggy address belongs to the object at ffff888054e73f80
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 freed 96-byte region [ffff888054e73f80, ffff888054e73fe0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888054e73d00 pfn:0x54e73
flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000200 ffff88813fea8280 ffffea0001ed9c50 ffffea0000be3f50
raw: ffff888054e73d00 0000000800200005 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5823, tgid 5823 (syz-executor), ts 389218288170, free_ts 389218214316
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_slab_page mm/slub.c:3269 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3458
 new_slab mm/slub.c:3516 [inline]
 refill_objects+0x331/0x3c0 mm/slub.c:7153
 refill_sheaf mm/slub.c:2818 [inline]
 __pcs_replace_empty_main+0x2b9/0x620 mm/slub.c:4592
 alloc_from_pcs mm/slub.c:4695 [inline]
 slab_alloc_node mm/slub.c:4829 [inline]
 __kmalloc_cache_node_noprof+0x465/0x6b0 mm/slub.c:5366
 kmalloc_node_noprof include/linux/slab.h:1077 [inline]
 __get_vm_area_node+0x13f/0x300 mm/vmalloc.c:3221
 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024
 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline]
 vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4202
 alloc_counters+0x64/0x5d0 net/ipv4/netfilter/ip_tables.c:799
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:837 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline]
 do_ip6t_get_ctl+0xabd/0x1230 net/ipv6/netfilter/ip6_tables.c:1677
 nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
 ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
 do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2382
 __sys_getsockopt net/socket.c:2411 [inline]
 __do_sys_getsockopt net/socket.c:2418 [inline]
 __se_sys_getsockopt net/socket.c:2415 [inline]
 __x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2415
page last free pid 5823 tgid 5823 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1433 [inline]
 __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978
 vfree+0x25a/0x400 mm/vmalloc.c:3479
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:882 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline]
 do_ip6t_get_ctl+0xf14/0x1230 net/ipv6/netfilter/ip6_tables.c:1677
 nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
 ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
 do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2382
 __sys_getsockopt net/socket.c:2411 [inline]
 __do_sys_getsockopt net/socket.c:2418 [inline]
 __se_sys_getsockopt net/socket.c:2415 [inline]
 __x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2415
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888054e73e80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888054e73f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888054e73f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff888054e74000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888054e74080: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 b8 01 01 01 01 01 	movabs $0x101010101010101,%rax
   7:	01 01 01
   a:	48 0f af c1          	imul   %rcx,%rax
   e:	41 89 f9             	mov    %edi,%r9d
  11:	41 83 e1 07          	and    $0x7,%r9d
  15:	75 74                	jne    0x8b
  17:	48 89 d1             	mov    %rdx,%rcx
  1a:	48 c1 e9 06          	shr    $0x6,%rcx
  1e:	74 39                	je     0x59
  20:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  27:	00 00
* 29:	48 ff c9             	dec    %rcx <-- trapping instruction
  2c:	48 89 07             	mov    %rax,(%rdi)
  2f:	48 89 47 08          	mov    %rax,0x8(%rdi)
  33:	48 89 47 10          	mov    %rax,0x10(%rdi)
  37:	48 89 47 18          	mov    %rax,0x18(%rdi)
  3b:	48 89 47 20          	mov    %rax,0x20(%rdi)