kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9060 Comm: syz-executor.0 Not tainted 5.2.0-rc3+ #22 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline] RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:900 [inline] RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:921 [inline] RIP: 0010:fib6_purge_rt+0x1a0/0x800 net/ipv6/ip6_fib.c:929 Code: c1 ea 03 42 80 3c 32 00 0f 85 43 05 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 9b 93 4c fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 79 05 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff RSP: 0018:ffff88808e117160 EFLAGS: 00010206 RAX: ffff888098d6c680 RBX: ffff888097bc5180 RCX: 1ffffffff10ea64c RDX: 0000000000000284 RSI: ffffffff86241465 RDI: 0000000000001420 RBP: ffff88808e1171c8 R08: ffff888098d6c680 R09: ffffed1011c22e13 R10: ffffed1011c22e12 R11: 0000000000000003 R12: 0000000000000000 R13: ffff88809ffaccc0 R14: dffffc0000000000 R15: 00000000000013b0 FS: 0000555555f2a940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000025887d0 CR3: 0000000099c21000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fib6_del_route net/ipv6/ip6_fib.c:1817 [inline] fib6_del+0x9bd/0xeb0 net/ipv6/ip6_fib.c:1848 fib6_clean_node+0x3a5/0x590 net/ipv6/ip6_fib.c:2010 fib6_walk_continue+0x4a9/0x8e0 net/ipv6/ip6_fib.c:1932 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1980 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2059 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2075 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2086 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4343 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4348 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3707 addrconf_notify+0x5db/0x2370 net/ipv6/addrconf.c:3632 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1749 call_netdevice_notifiers_extack net/core/dev.c:1761 [inline] call_netdevice_notifiers net/core/dev.c:1775 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1518 rollback_registered_many+0x43b/0xfc0 net/core/dev.c:8155 rollback_registered+0x109/0x1d0 net/core/dev.c:8220 unregister_netdevice_queue net/core/dev.c:9267 [inline] unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9260 unregister_netdevice include/linux/netdevice.h:2631 [inline] __tun_detach+0xd8a/0x1040 drivers/net/tun.c:724 tun_detach drivers/net/tun.c:741 [inline] tun_chr_close+0xe0/0x180 drivers/net/tun.c:3451 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:877 do_group_exit+0x135/0x370 kernel/exit.c:981 __do_sys_exit_group kernel/exit.c:992 [inline] __se_sys_exit_group kernel/exit.c:990 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:990 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: Bad RIP value. RSP: 002b:00007fffce8bc068 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001c RCX: 0000000000459279 RDX: 0000000000412e80 RSI: 0000000000a74ef0 RDI: 0000000000000043 RBP: 00000000004be9d7 R08: 000000000000000c R09: 000000000003cbcb R10: 0000555555f2a940 R11: 0000000000000246 R12: 00000000ffffffff R13: 00007fffce8bc1b0 R14: 000000000003cb87 R15: 00007fffce8bc1c0 Modules linked in: ---[ end trace d59ee8fc8355c2a6 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline] RIP: 0010:__fib6_drop_pcpu_from net/ipv6/ip6_fib.c:900 [inline] RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:921 [inline] RIP: 0010:fib6_purge_rt+0x1a0/0x800 net/ipv6/ip6_fib.c:929 Code: c1 ea 03 42 80 3c 32 00 0f 85 43 05 00 00 4c 8b 38 4d 85 ff 0f 84 5c ff ff ff e8 9b 93 4c fb 49 8d 7f 70 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 79 05 00 00 49 8b 57 70 49 39 d5 0f 85 34 ff RSP: 0018:ffff88808e117160 EFLAGS: 00010206 RAX: ffff888098d6c680 RBX: ffff888097bc5180 RCX: 1ffffffff10ea64c RDX: 0000000000000284 RSI: ffffffff86241465 RDI: 0000000000001420 RBP: ffff88808e1171c8 R08: ffff888098d6c680 R09: ffffed1011c22e13 R10: ffffed1011c22e12 R11: 0000000000000003 R12: 0000000000000000 R13: ffff88809ffaccc0 R14: dffffc0000000000 R15: 00000000000013b0 FS: 0000555555f2a940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045924f CR3: 0000000099c21000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400