netdevsim netdevsim1 netdevsim0: renamed from eth0
netdevsim netdevsim1 netdevsim1: renamed from eth1
==================================================================
BUG: KASAN: stack-out-of-bounds in __bpf_get_stack+0x54a/0xa70 kernel/bpf/stackmap.c:501
Write of size 208 at addr ffffc90003655ee8 by task syz-executor/5952

CPU: 1 UID: 0 PID: 5952 Comm: syz-executor Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 __bpf_get_stack+0x54a/0xa70 kernel/bpf/stackmap.c:501
 ____bpf_get_stack kernel/bpf/stackmap.c:525 [inline]
 bpf_get_stack+0x33/0x50 kernel/bpf/stackmap.c:522
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1835 [inline]
 bpf_get_stack_raw_tp+0x1a9/0x220 kernel/trace/bpf_trace.c:1825
 bpf_prog_4e330ebee64cb698+0x43/0x4b
 bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline]
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run include/linux/filter.h:725 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline]
 bpf_trace_run10+0x2e4/0x500 kernel/trace/bpf_trace.c:2306
 __bpf_trace_percpu_alloc_percpu+0x364/0x400 include/trace/events/percpu.h:11
 __do_trace_percpu_alloc_percpu include/trace/events/percpu.h:11 [inline]
 trace_percpu_alloc_percpu include/trace/events/percpu.h:11 [inline]
 pcpu_alloc_noprof+0x1534/0x16b0 mm/percpu.c:1892
 fib_nh_common_init+0x9c/0x3b0 net/ipv4/fib_semantics.c:620
 fib6_nh_init+0x1608/0x1ff0 net/ipv6/route.c:3671
 ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3892
 ip6_route_add+0x6e/0x1b0 net/ipv6/route.c:3944
 addrconf_add_mroute net/ipv6/addrconf.c:2552 [inline]
 addrconf_add_dev+0x24f/0x340 net/ipv6/addrconf.c:2570
 addrconf_dev_config net/ipv6/addrconf.c:3479 [inline]
 addrconf_init_auto_addrs+0x57c/0xa30 net/ipv6/addrconf.c:3567
 addrconf_notify+0xacc/0x1010 net/ipv6/addrconf.c:3740
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9608
 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3143
 rtnl_changelink net/core/rtnetlink.c:3761 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
 rtnl_newlink+0x160b/0x1c70 net/core/rtnetlink.c:4057
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6946
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:729
 __sys_sendto+0x3bd/0x520 net/socket.c:2228
 __do_sys_sendto net/socket.c:2235 [inline]
 __se_sys_sendto net/socket.c:2231 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2231
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec5c790a7c
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:00007fff7b55f7b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fec5d4e35c0 RCX: 00007fec5c790a7c
RDX: 0000000000000030 RSI: 00007fec5d4e3610 RDI: 0000000000000006
RBP: 0000000000000000 R08: 00007fff7b55f804 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000006
R13: 0000000000000000 R14: 00007fec5d4e3610 R15: 0000000000000000
 </TASK>

The buggy address belongs to stack of task syz-executor/5952
 and is located at offset 296 in frame:
 __bpf_get_stack+0x0/0xa70 include/linux/mmap_lock.h:-1

This frame has 1 object:
 [32, 36) 'rctx.i'

The buggy address belongs to a 8-page vmalloc region starting at 0xffffc90003650000 allocated at copy_process+0x54b/0x3c00 kernel/fork.c:2002
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888024c63200 pfn:0x24c62
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff888024c63200 0000000000000000 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 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOWARN), pid 5845, tgid 5845 (syz-executor), ts 59049058263, free_ts 59031992240
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507
 vm_area_alloc_pages mm/vmalloc.c:3642 [inline]
 __vmalloc_area_node mm/vmalloc.c:3720 [inline]
 __vmalloc_node_range_noprof+0x97d/0x12f0 mm/vmalloc.c:3893
 __vmalloc_node_noprof+0xc2/0x110 mm/vmalloc.c:3956
 alloc_thread_stack_node kernel/fork.c:318 [inline]
 dup_task_struct+0x3e7/0x860 kernel/fork.c:879
 copy_process+0x54b/0x3c00 kernel/fork.c:2002
 kernel_clone+0x21e/0x840 kernel/fork.c:2603
 __do_sys_clone3 kernel/fork.c:2907 [inline]
 __se_sys_clone3+0x256/0x2d0 kernel/fork.c:2886
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5907 tgid 5907 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895
 vfree+0x25a/0x400 mm/vmalloc.c:3434
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffffc90003655e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90003655e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90003655f00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2
                                           ^
 ffffc90003655f80: 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3
 ffffc90003656000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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