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: 1 PID: 18281 Comm: syz-executor.1 Not tainted 5.1.0-rc6+ #188 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline] RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960 Code: 0f b6 35 7f c9 43 03 31 ff 44 89 f6 e8 06 d5 59 fb 45 84 f6 0f 84 b3 00 00 00 e8 b8 d3 59 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80 RSP: 0018:ffff8880681cefa8 EFLAGS: 00010207 RAX: 0000000000000053 RBX: dffffc0000000000 RCX: ffffc9000816c000 RDX: 0000000000040000 RSI: ffffffff8616b938 RDI: 000000000000029c RBP: ffff8880681cf000 R08: ffff8880a6020040 R09: ffffed1014276506 R10: ffffed1014276505 R11: ffff8880a13b282f R12: 0000000000000001 R13: ffff8880a13b2800 R14: 0000000000000001 R15: 000000000000022c FS: 00007f23205eb700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 000000008ed0b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fib6_del_route net/ipv6/ip6_fib.c:1813 [inline] fib6_del+0xac2/0x10a0 net/ipv6/ip6_fib.c:1844 fib6_clean_node+0x3a8/0x590 net/ipv6/ip6_fib.c:2006 fib6_walk_continue+0x495/0x900 net/ipv6/ip6_fib.c:1928 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:1976 fib6_clean_tree+0xe0/0x120 net/ipv6/ip6_fib.c:2055 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2071 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2082 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4068 rt6_disable_ip+0x27/0x5f0 net/ipv6/route.c:4073 addrconf_ifdown+0xa2/0x1220 net/ipv6/addrconf.c:3705 addrconf_notify+0x19a/0x2260 net/ipv6/addrconf.c:3630 notifier_call_chain+0xc7/0x240 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1753 call_netdevice_notifiers_extack net/core/dev.c:1765 [inline] call_netdevice_notifiers net/core/dev.c:1779 [inline] __dev_notify_flags+0x1e9/0x2c0 net/core/dev.c:7623 dev_change_flags+0x10d/0x170 net/core/dev.c:7659 devinet_ioctl+0xde6/0x1cf0 net/ipv4/devinet.c:1104 inet_ioctl+0x2d4/0x410 net/ipv4/af_inet.c:954 sock_do_ioctl+0xde/0x300 net/socket.c:1037 sock_ioctl+0x32b/0x610 net/socket.c:1168 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f23205eac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000020000040 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f23205eb6d4 R13: 00000000004c4635 R14: 00000000004d7ec8 R15: 00000000ffffffff Modules linked in: ---[ end trace 42bec7aed89d5721 ]--- RIP: 0010:fib6_drop_pcpu_from net/ipv6/ip6_fib.c:924 [inline] RIP: 0010:fib6_purge_rt+0x4b3/0x670 net/ipv6/ip6_fib.c:960 Code: 0f b6 35 7f c9 43 03 31 ff 44 89 f6 e8 06 d5 59 fb 45 84 f6 0f 84 b3 00 00 00 e8 b8 d3 59 fb 49 8d 7f 70 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 64 01 00 00 48 89 f8 4d 8b 77 70 48 c1 e8 03 80 RSP: 0018:ffff8880681cefa8 EFLAGS: 00010207 RAX: 0000000000000053 RBX: dffffc0000000000 RCX: ffffc9000816c000 RDX: 0000000000040000 RSI: ffffffff8616b938 RDI: 000000000000029c RBP: ffff8880681cf000 R08: ffff8880a6020040 R09: ffffed1014276506 R10: ffffed1014276505 R11: ffff8880a13b282f R12: 0000000000000001 R13: ffff8880a13b2800 R14: 0000000000000001 R15: 000000000000022c FS: 00007f23205eb700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 000000008ed0b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400