bisecting fixing commit since dda0e2920330128e0dbdeb11c8f25031aa40b11c building syzkaller on 5ed396e666c7826bed46f06c4db1409376691fed testing commit dda0e2920330128e0dbdeb11c8f25031aa40b11c with gcc (GCC) 8.4.1 20210217 kernel signature: 40b33c23d5d7d76310a458fb05b555ebf7b8a28bba856b7743d62fbb9c7a1f2b run #0: crashed: WARNING in ip_rt_bug run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in ip_rt_bug run #4: crashed: WARNING in ip_rt_bug run #5: crashed: WARNING in ip_rt_bug run #6: crashed: WARNING in ip_rt_bug run #7: crashed: WARNING in ip_rt_bug run #8: crashed: WARNING in ip_rt_bug run #9: crashed: WARNING in corrupted run #10: crashed: WARNING in ip_rt_bug run #11: crashed: WARNING in ip_rt_bug run #12: crashed: WARNING in ip_rt_bug run #13: crashed: WARNING in ip_rt_bug run #14: crashed: WARNING in ip_rt_bug run #15: crashed: WARNING in ip_rt_bug run #16: crashed: WARNING in ip_rt_bug run #17: crashed: WARNING in ip_rt_bug run #18: crashed: WARNING in ip_rt_bug run #19: crashed: WARNING in ip_rt_bug testing current HEAD 6b7b0056defc6eb5c87bbe4690ccda547b2891aa testing commit 6b7b0056defc6eb5c87bbe4690ccda547b2891aa with gcc (GCC) 8.4.1 20210217 kernel signature: d2f56b425aa1b74136f5118bf40fc216f9e5c5d7e7a43a696648e24168b9dae3 run #0: crashed: WARNING in ip_rt_bug run #1: crashed: WARNING in ip_rt_bug run #2: crashed: WARNING in ip_rt_bug run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in ip_rt_bug run #5: crashed: WARNING in ip_rt_bug run #6: crashed: WARNING in ip_rt_bug run #7: crashed: WARNING in ip_rt_bug run #8: crashed: WARNING in ip_rt_bug run #9: crashed: WARNING in ip_rt_bug revisions tested: 2, total time: 28m50.991770819s (build: 21m11.522536829s, test: 6m39.793773844s) the crash still happens on HEAD commit msg: Linux 4.19.192 crash: WARNING in ip_rt_bug IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready syz-executor.1 uses obsolete (PF_INET,SOCK_PACKET) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7178 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Modules linked in: CPU: 0 PID: 7178 Comm: syz-executor.1 Not tainted 4.19.192-syzkaller #0 ------------[ cut here ]------------ Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881d88a7110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d8012a40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d88a7110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e8120100 R13: ffff8881d236d840 R14: ffff8881d8012a98 R15: ffff8881d88a73d4 FS: 00007fe3bd1b8700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001ea96a005 CR4: 00000000001606f0 WARNING: CPU: 1 PID: 7189 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Modules linked in: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: CPU: 1 PID: 7189 Comm: syz-executor.0 Not tainted 4.19.192-syzkaller #0 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 RSP: 0018:ffff8881dab37110 EFLAGS: 00010282 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 RAX: 0000000000000024 RBX: ffff8881d8138200 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881dab37110 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d13980c0 R13: ffff8881edf966c0 R14: ffff8881d8138258 R15: ffff8881dab373d4 FS: 00007fb89e098700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb2bbc5ebb8 CR3: 00000001de98f005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3bd1b8198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 vfs_write+0x150/0x4d0 fs/read_write.c:549 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 ksys_write+0x103/0x260 fs/read_write.c:599 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fe3bd1b86bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1715 hardirqs last enabled at (1714): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1715): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1560): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1560): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1562): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 ---[ end trace 12f37c7b5377704b ]--- do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 ------------[ cut here ]------------ entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb89e098198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fb89e0986bc R14: 00000000ffffffff R15: 0000000000000003 WARNING: CPU: 0 PID: 7201 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 irq event stamp: 1419 Modules linked in: hardirqs last enabled at (1418): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 CPU: 0 PID: 7201 Comm: syz-executor.3 Tainted: G W 4.19.192-syzkaller #0 hardirqs last disabled at (1419): [] trace_hardirqs_off_thunk+0x1a/0x1c Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 softirqs last enabled at (1316): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1316): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1318): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ---[ end trace 12f37c7b5377704c ]--- Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881d8f6f110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d5b8a340 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d8f6f110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d0dc4140 R13: ffff8881d236c140 R14: ffff8881d5b8a398 R15: ffff8881d8f6f3d4 FS: 00007fcc66d2a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2fc3c8bba0 CR3: 00000001db1df003 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc66d2a198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fcc66d2a6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1349 hardirqs last enabled at (1348): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (1349): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1220): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1220): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1222): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b5377704d ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7274 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Modules linked in: CPU: 0 PID: 7274 Comm: syz-executor.3 Tainted: G W 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ------------[ cut here ]------------ RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881e6697110 EFLAGS: 00010282 WARNING: CPU: 1 PID: 7289 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 RAX: 0000000000000024 RBX: ffff8881d6ca8a00 RCX: 0000000000000000 Modules linked in: RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881e6697110 R08: ffffed103ed05079 R09: ffffed103ed05078 CPU: 1 PID: 7289 Comm: syz-executor.2 Tainted: G W 4.19.192-syzkaller #0 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d0dc4140 R13: ffff8881d236c140 R14: ffff8881d6ca8a58 R15: ffff8881e66973d4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FS: 00007fcc66d2a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a72672 CR3: 00000001d59cf004 CR4: 00000000001606f0 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RSP: 0018:ffff8881d83b7110 EFLAGS: 00010282 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RAX: 0000000000000024 RBX: ffff8881dec2b700 RCX: 0000000000000000 Call Trace: RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 RBP: ffff8881d83b7110 R08: ffffed103ed25079 R09: ffffed103ed25078 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e8d90080 R13: ffff8881e8870c40 R14: ffff8881dec2b758 R15: ffff8881d83b73d4 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 FS: 00007ff3eea1f700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001d890e001 CR4: 00000000001606e0 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 ksys_write+0x103/0x260 fs/read_write.c:599 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 vfs_write+0x150/0x4d0 fs/read_write.c:549 entry_SYSCALL_64_after_hwframe+0x49/0xbe ksys_write+0x103/0x260 fs/read_write.c:599 RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc66d2a198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 R13: 00007fcc66d2a6bc R14: 00000000ffffffff R15: 0000000000000003 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 2735 RIP: 0033:0x4641a9 hardirqs last enabled at (2734): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 hardirqs last disabled at (2735): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2608): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (2608): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 RSP: 002b:00007ff3eea1f198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 softirqs last disabled at (2610): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 ---[ end trace 12f37c7b5377704e ]--- RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ff3eea1f6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1233 hardirqs last enabled at (1232): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (1233): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1128): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1128): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1130): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b5377704f ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7324 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Modules linked in: ------------[ cut here ]------------ CPU: 0 PID: 7324 Comm: syz-executor.5 Tainted: G W 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881d648f110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d4fcf540 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d648f110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e720c1c0 R13: ffff8881e72db300 R14: ffff8881d4fcf598 R15: ffff8881d648f3d4 FS: 00007f2a126f9700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 WARNING: CPU: 1 PID: 7329 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Modules linked in: CR2: 000000002014f000 CR3: 00000001d4e0d005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CPU: 1 PID: 7329 Comm: syz-executor.3 Tainted: G W 4.19.192-syzkaller #0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 RSP: 0018:ffff8881d0147110 EFLAGS: 00010282 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 RAX: 0000000000000024 RBX: ffff8881db5ae6c0 RCX: 0000000000000000 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d0147110 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d0dc4140 R13: ffff8881e872f880 R14: ffff8881db5ae718 R15: ffff8881d01473d4 FS: 00007fcc66ce8700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005582a9391db0 CR3: 00000001d59cf003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 entry_SYSCALL_64_after_hwframe+0x49/0xbe call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2a126f9198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 vfs_write+0x150/0x4d0 fs/read_write.c:549 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f2a126f96bc R14: 00000000ffffffff R15: 0000000000000003 ksys_write+0x103/0x260 fs/read_write.c:599 irq event stamp: 1241 hardirqs last enabled at (1240): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1241): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1136): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1136): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1138): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777050 ]--- __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 ------------[ cut here ]------------ do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 WARNING: CPU: 0 PID: 7333 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 entry_SYSCALL_64_after_hwframe+0x49/0xbe Modules linked in: RIP: 0033:0x4641a9 CPU: 0 PID: 7333 Comm: syz-executor.4 Tainted: G W 4.19.192-syzkaller #0 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RSP: 002b:00007fcc66ce8198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881cf4d7110 EFLAGS: 00010282 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 RAX: 0000000000000024 RBX: ffff8881d42b7840 RCX: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053c040 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 R13: 00007fcc66ce86bc R14: 00000000ffffffff R15: 0000000000000003 RBP: ffff8881cf4d7110 R08: ffffed103ed05079 R09: ffffed103ed05078 irq event stamp: 167 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e6b24180 hardirqs last enabled at (166): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 R13: ffff8881e872e740 R14: ffff8881d42b7898 R15: ffff8881cf4d73d4 FS: 00007f21e4644700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 hardirqs last disabled at (167): [] trace_hardirqs_off_thunk+0x1a/0x1c CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 softirqs last enabled at (52): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (52): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 CR2: 000000002014f000 CR3: 00000001d7cbe001 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 softirqs last disabled at (54): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ---[ end trace 12f37c7b53777051 ]--- dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f21e4644198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f21e46446bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1237 hardirqs last enabled at (1236): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (1237): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1128): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1128): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1130): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777052 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7368 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Modules linked in: CPU: 0 PID: 7368 Comm: syz-executor.3 Tainted: G W 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881d0147110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881f4451080 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d0147110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d0dc4140 R13: ffff8881d236c140 R14: ffff8881f44510d8 R15: ffff8881d01473d4 FS: 00007fcc66d2a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc444e1c60 CR3: 00000001d59cf005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc66d2a198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fcc66d2a6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1227 hardirqs last enabled at (1226): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1227): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1100): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1100): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1102): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777053 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7394 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ------------[ cut here ]------------ Modules linked in: CPU: 0 PID: 7394 Comm: syz-executor.0 Tainted: G W 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881f3627110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881f4b18c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881f3627110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d13980c0 R13: ffff8881edf96c80 R14: ffff8881f4b18c58 R15: ffff8881f36273d4 FS: 00007fb89e098700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 WARNING: CPU: 1 PID: 7391 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 CR2: 00007f2a126f9718 CR3: 00000001db662004 CR4: 00000000001606f0 Modules linked in: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CPU: 1 PID: 7391 Comm: syz-executor.1 Tainted: G W 4.19.192-syzkaller #0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 RSP: 0018:ffff8881d6e97110 EFLAGS: 00010282 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 RAX: 0000000000000024 RBX: ffff8881deabfe00 RCX: 0000000000000000 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 RBP: ffff8881d6e97110 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e8120100 R13: ffff8881d236d280 R14: ffff8881deabfe58 R15: ffff8881d6e973d4 FS: 00007fe3bd1b8700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005582a9394000 CR3: 00000001d4e0d005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb89e098198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 vfs_write+0x150/0x4d0 fs/read_write.c:549 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 ksys_write+0x103/0x260 fs/read_write.c:599 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fb89e0986bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1231 hardirqs last enabled at (1230): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1231): [] trace_hardirqs_off_thunk+0x1a/0x1c __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 softirqs last enabled at (1114): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1114): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1116): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 ---[ end trace 12f37c7b53777054 ]--- ------------[ cut here ]------------ entry_SYSCALL_64_after_hwframe+0x49/0xbe WARNING: CPU: 0 PID: 7399 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 RIP: 0033:0x4641a9 Modules linked in: Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 CPU: 0 PID: 7399 Comm: syz-executor.2 Tainted: G W 4.19.192-syzkaller #0 RSP: 002b:00007fe3bd1b8198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 RSP: 0018:ffff8881d648f110 EFLAGS: 00010282 R13: 00007fe3bd1b86bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1243 RAX: 0000000000000024 RBX: ffff8881f40f80c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 hardirqs last enabled at (1242): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 RBP: ffff8881d648f110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e8d90080 hardirqs last disabled at (1243): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1128): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1128): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 R13: ffff8881e8871200 R14: ffff8881f40f8118 R15: ffff8881d648f3d4 FS: 00007ff3eea1f700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 softirqs last disabled at (1130): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777055 ]--- CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001f53d4004 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff3eea1f198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ff3eea1f6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1873 hardirqs last enabled at (1872): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (1873): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1756): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1756): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (1758): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777056 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7409 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ------------[ cut here ]------------ Modules linked in: CPU: 0 PID: 7409 Comm: syz-executor.5 Tainted: G W 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 RSP: 0018:ffff8881d46c7110 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881f4152940 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d46c7110 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e720c1c0 R13: ffff8881e72db300 R14: ffff8881f4152998 R15: ffff8881d46c73d4 FS: 00007f2a126d8700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000053c000 CR3: 00000001d03b8004 CR4: 00000000001606f0 WARNING: CPU: 1 PID: 7410 at net/ipv4/route.c:1240 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Modules linked in: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 CPU: 1 PID: 7410 Comm: syz-executor.3 Tainted: G W 4.19.192-syzkaller #0 Call Trace: dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1240 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 Code: 48 8b 45 d8 e9 ed fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 d7 48 89 e5 e8 14 e8 a2 ff 48 c7 c7 80 3d c7 87 e8 13 fa 16 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 RSP: 0018:ffff8881d4a67110 EFLAGS: 00010282 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 RAX: 0000000000000024 RBX: ffff8881f3ca3340 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b0a0 RDI: ffffffff8a1869a0 RBP: ffff8881d4a67110 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d0dc4140 R13: ffff8881e872f880 R14: ffff8881f3ca3398 R15: ffff8881d4a673d4 FS: 00007fcc66d09700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 CR2: 00005582a93d1a30 CR3: 00000001d59cf005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 dst_output include/net/dst.h:455 [inline] ip_local_out+0x74/0x130 net/ipv4/ip_output.c:125 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1447 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1467 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbcd/0x18e0 net/ipv4/icmp.c:747 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 tun_get_user+0x2944/0x4ae0 drivers/net/tun.c:1974 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 RSP: 002b:00007f2a126d8198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bfa0 R13: 00007f2a126d86bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 165 vfs_write+0x150/0x4d0 fs/read_write.c:549 hardirqs last enabled at (164): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 ksys_write+0x103/0x260 fs/read_write.c:599 hardirqs last disabled at (165): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (38): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (38): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (40): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777057 ]--- __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc66d09198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bfa0 R13: 00007fcc66d096bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 241 hardirqs last enabled at (240): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 hardirqs last disabled at (241): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (114): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (114): [] tun_get_user+0x287c/0x4ae0 drivers/net/tun.c:1921 softirqs last disabled at (116): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace 12f37c7b53777058 ]---