bisecting fixing commit since dda0e2920330128e0dbdeb11c8f25031aa40b11c building syzkaller on 5ed396e666c7826bed46f06c4db1409376691fed testing commit dda0e2920330128e0dbdeb11c8f25031aa40b11c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9d1153801e16b4d577aa4e7e68e1b896f1bae4c41ed39a231ae97423247cee61 run #0: crashed: WARNING in ip_rt_bug run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in ip_rt_bug 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 ip_rt_bug 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 6ca2f514c57864e3085a65c5e9d2adca4144bc4c testing commit 6ca2f514c57864e3085a65c5e9d2adca4144bc4c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: c8f5868e8edfeb36ee0b84fc91bb65a5c226d8fc28df3aab8ad099f7f131b006 all runs: crashed: WARNING in ip_rt_bug revisions tested: 2, total time: 30m1.724606835s (build: 22m12.589573956s, test: 6m14.376986015s) the crash still happens on HEAD commit msg: Linux 4.19.201 crash: WARNING in ip_rt_bug IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7314 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 0 PID: 7314 Comm: syz-executor.1 Not tainted 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881d65ff100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d6d6b8c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881d65ff100 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e79ac100 R13: ffff8881ed919280 R14: ffff8881d6d6b918 R15: ffff8881d65ff3c4 FS: 00007f3427380700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe67226ff8 CR3: 00000001d76f8006 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:1451 WARNING: CPU: 1 PID: 7369 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 Modules linked in: icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 CPU: 1 PID: 7369 Comm: syz-executor.4 Not tainted 4.19.201-syzkaller #0 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881d06d7100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d6670e80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881d06d7100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d0ea4180 R13: ffff8881d24a3300 R14: ffff8881d6670ed8 R15: ffff8881d06d73c4 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 FS: 00007f6967904700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001d8d6a006 CR4: 00000000001606e0 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 Call Trace: 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 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 __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 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 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 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 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 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 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 __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:00007f3427380198 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: 00007f34273806bc R14: 00000000ffffffff R15: 0000000000000003 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 irq event stamp: 259 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 hardirqs last enabled at (258): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (259): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (138): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (138): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (140): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098a8 ]--- 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:00007f6967904198 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: 00007f69679046bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1303 hardirqs last enabled at (1302): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 hardirqs last disabled at (1303): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1180): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1180): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1182): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098a9 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7399 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 0 PID: 7399 Comm: syz-executor.3 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881cdbc7100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d8b066c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 ------------[ cut here ]------------ RBP: ffff8881cdbc7100 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e798c140 R13: ffff8881e7c3b880 R14: ffff8881d8b06718 R15: ffff8881cdbc73c4 FS: 00007f8c86b55700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc427f6a50 CR3: 00000001dc883001 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 WARNING: CPU: 1 PID: 7410 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7410 Comm: syz-executor.2 Tainted: G W 4.19.201-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:1247 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881d4017100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d6ddf7c0 RCX: 0000000000000000 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881d4017100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e7968080 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 R13: ffff8881e82f0c40 R14: ffff8881d6ddf818 R15: ffff8881d40173c4 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 FS: 00007fe0995ab700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001cf624002 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 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 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 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 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 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 __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:00007f8c86b55198 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: 00007f8c86b556bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1313 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 hardirqs last enabled at (1312): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 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 hardirqs last disabled at (1313): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1208): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1208): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1210): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098aa ]--- ------------[ cut here ]------------ 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 WARNING: CPU: 0 PID: 7417 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 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 Modules linked in: RSP: 002b:00007fe0995ab198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 CPU: 0 PID: 7417 Comm: syz-executor.5 Tainted: G W 4.19.201-syzkaller #0 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 RIP: 0010:ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007fe0995ab6bc R14: 00000000ffffffff R15: 0000000000000003 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 irq event stamp: 1235 RSP: 0018:ffff8881d4b0f100 EFLAGS: 00010286 hardirqs last enabled at (1234): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 RAX: 0000000000000024 RBX: ffff8881d70de440 RCX: 0000000000000000 hardirqs last disabled at (1235): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1132): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1132): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 softirqs last disabled at (1134): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098ab ]--- RBP: ffff8881d4b0f100 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e6be81c0 R13: ffff8881e7c3a180 R14: ffff8881d70de498 R15: ffff8881d4b0f3c4 FS: 00007efd73103700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002014f000 CR3: 00000001d8666006 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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+0x29b2/0x4e50 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:00007efd73103198 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: 00007efd731036bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1335 hardirqs last enabled at (1334): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 hardirqs last disabled at (1335): [] 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+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1222): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098ac ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7447 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 0 PID: 7447 Comm: syz-executor.4 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881f40af100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d72dc300 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881f40af100 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d0ea4180 R13: ffff8881d24a38c0 R14: ffff8881d72dc358 R15: ffff8881f40af3c4 FS: 00007f6967904700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c86b13718 CR3: 00000001dde45003 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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+0x29b2/0x4e50 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:00007f6967904198 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: 00007f69679046bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1293 hardirqs last enabled at (1292): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1293): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1176): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1176): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1178): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098ad ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7426 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7426 Comm: syz-executor.1 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881de2b7100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881d3cf7b40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881de2b7100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e79ac100 R13: ffff8881ed918cc0 R14: ffff8881d3cf7b98 R15: ffff8881de2b73c4 FS: 00007f3427380700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000050e3b4 CR3: 00000001d76fe005 CR4: 00000000001606e0 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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+0x29b2/0x4e50 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:00007f3427380198 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: 00007f34273806bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1263 hardirqs last enabled at (1262): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1263): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1148): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1148): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1150): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098ae ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7486 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7486 Comm: syz-executor.4 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881f39df100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881e95711c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881f39df100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d0ea4180 R13: ffff8881d24a3300 R14: ffff8881e9571218 R15: ffff8881f39df3c4 FS: 00007f69678e3700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000053c000 CR3: 00000001dde45001 CR4: 00000000001606e0 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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+0x29b2/0x4e50 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:00007f69678e3198 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: 00007f69678e36bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 243 hardirqs last enabled at (242): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (243): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (116): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (116): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (118): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098af ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7594 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7594 Comm: syz-executor.2 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 01 <0f> 0b 31 c0 5d c3 66 90 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 ------------[ cut here ]------------ RSP: 0018:ffff8881d454f100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881eef67400 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881d454f100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881e7968080 R13: ffff8881e82f0c40 R14: ffff8881eef67458 R15: ffff8881d454f3c4 FS: 00007fe0995ab700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000050c1f4 CR3: 00000001f3912004 CR4: 00000000001606e0 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 WARNING: CPU: 0 PID: 7593 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 0 PID: 7593 Comm: syz-executor.0 Tainted: G W 4.19.201-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:1247 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881f38e7100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881eeb40e40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 ip_rcv_options net/ipv4/ip_input.c:282 [inline] ip_rcv_finish_core.isra.16+0x3b1/0x1830 net/ipv4/ip_input.c:356 RBP: ffff8881f38e7100 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881e70580c0 ip_rcv_finish+0x104/0x270 net/ipv4/ip_input.c:412 R13: ffff8881e787cc80 R14: ffff8881eeb40e98 R15: ffff8881f38e73c4 FS: 00007fe1be32b700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 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 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd9bd47dfc CR3: 00000001d4e82004 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 __netif_receive_skb_one_core+0x112/0x1a0 net/core/dev.c:4954 ip_send_skb+0x36/0xa0 net/ipv4/ip_output.c:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5066 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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 icmp_send include/net/icmp.h:47 [inline] ip_options_compile+0xad/0xc0 net/ipv4/ip_options.c:485 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 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 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5156 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 netif_receive_skb+0x3b/0x1e0 net/core/dev.c:5213 tun_rx_batched.isra.54+0x4d8/0x9c0 drivers/net/tun.c:1543 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 tun_get_user+0x29b2/0x4e50 drivers/net/tun.c:1974 __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:00007fe0995ab198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000d0d RCX: 00000000004641a9 RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 tun_chr_write_iter+0xb7/0x1a0 drivers/net/tun.c:2007 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 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 R13: 00007fe0995ab6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1263 hardirqs last enabled at (1262): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1263): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1132): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1132): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1134): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098b0 ]--- 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:00007fe1be32b198 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: 00007fe1be32b6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1293 hardirqs last enabled at (1292): [] console_unlock+0xb9f/0xde0 kernel/printk/printk.c:2464 hardirqs last disabled at (1293): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1190): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1190): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1192): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098b1 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7668 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7668 Comm: syz-executor.4 Tainted: G W 4.19.201-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:1247 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 a4 e1 a2 ff 48 c7 c7 00 47 c7 87 e8 12 24 17 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:ffff8881de3bf100 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff8881f49fc6c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b320 RDI: ffffffff8a1889a0 RBP: ffff8881de3bf100 R08: ffffed103ed25079 R09: ffffed103ed25078 R10: ffffed103ed25078 R11: ffff8881f69283c7 R12: ffff8881d0ea4180 R13: ffff8881d24a3300 R14: ffff8881f49fc718 R15: ffff8881de3bf3c4 FS: 00007f6967904700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcc4635bac CR3: 00000001d4f34006 CR4: 00000000001606e0 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:1451 ip_push_pending_frames+0x4d/0x70 net/ipv4/ip_output.c:1471 icmp_push_reply+0x383/0x610 net/ipv4/icmp.c:398 __icmp_send+0xbe1/0x18f0 net/ipv4/icmp.c:754 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+0x29b2/0x4e50 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:00007f6967904198 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: 00007f69679046bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 1315 hardirqs last enabled at (1314): [] console_unlock+0x660/0xde0 kernel/printk/printk.c:2489 hardirqs last disabled at (1315): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1188): [] rcu_read_unlock include/linux/rcupdate.h:677 [inline] softirqs last enabled at (1188): [] tun_get_user+0x28ea/0x4e50 drivers/net/tun.c:1921 softirqs last disabled at (1190): [] tun_rx_batched.isra.54+0x439/0x9c0 drivers/net/tun.c:1570 ---[ end trace fd0693f8faf098b2 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7690 at net/ipv4/route.c:1247 ip_rt_bug+0x18/0x20 net/ipv4/route.c:1247 Modules linked in: CPU: 1 PID: 7690 Comm: syz-executor.5 Tainted: G W 4.19.201-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:1247