Re: WARNING in ip_rt_bug
From: Dmitry VyukovDate: Mon, 9 Apr 2018 08:06:20 +0200 > +Eric said that perhaps we just need to revert: > > commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc > Date: Sat May 21 07:16:42 2011 + > ipv4: Give backtrace in ip_rt_bug(). And I replied to him that we shouldn't. Reverting makes the backtrace, and all the useful debugging information, go away. It won't fix the actual bug, which seems to be that ICMP's route lookup tried to use an input route for sending a packet.
Re: WARNING in ip_rt_bug
From: Dmitry Vyukov Date: Mon, 9 Apr 2018 08:06:20 +0200 > +Eric said that perhaps we just need to revert: > > commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc > Date: Sat May 21 07:16:42 2011 + > ipv4: Give backtrace in ip_rt_bug(). And I replied to him that we shouldn't. Reverting makes the backtrace, and all the useful debugging information, go away. It won't fix the actual bug, which seems to be that ICMP's route lookup tried to use an input route for sending a packet.
Re: WARNING in ip_rt_bug
On 04/08/2018 11:06 PM, Dmitry Vyukov wrote: > On Mon, Apr 9, 2018 at 7:59 AM, syzbot >wrote: >> Hello, >> >> syzbot hit the following crash on net-next commit >> 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) >> Merge tag 'mlx5-updates-2018-03-30' of >> git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux >> syzbot dashboard link: >> https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab >> >> Unfortunately, I don't have any reproducer for this crash yet. >> Raw console output: >> https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 >> Kernel config: >> https://syzkaller.appspot.com/x/.config?id=3327544840960562528 >> compiler: gcc (GCC) 7.1.1 20170620 >> >> IMPORTANT: if you fix the bug, please add the following tag to the commit: >> Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com >> It will help syzbot understand when the bug is fixed. See footer for >> details. >> If you forward the report, please keep this part and the footer. > > > +Eric said that perhaps we just need to revert: > > commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc > Date: Sat May 21 07:16:42 2011 + > ipv4: Give backtrace in ip_rt_bug(). > And David replied : Let's not do the revert, I wouldn't have seen the backtrace which points where this bug is if we had. icmp_route_lookup(), in one branch, does an input route lookup and uses the result of that to send the icmp message. That can't be right, input routes should never be used for transmitting traffice and that's how we end up at ip_rt_bug().
Re: WARNING in ip_rt_bug
On 04/08/2018 11:06 PM, Dmitry Vyukov wrote: > On Mon, Apr 9, 2018 at 7:59 AM, syzbot > wrote: >> Hello, >> >> syzbot hit the following crash on net-next commit >> 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) >> Merge tag 'mlx5-updates-2018-03-30' of >> git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux >> syzbot dashboard link: >> https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab >> >> Unfortunately, I don't have any reproducer for this crash yet. >> Raw console output: >> https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 >> Kernel config: >> https://syzkaller.appspot.com/x/.config?id=3327544840960562528 >> compiler: gcc (GCC) 7.1.1 20170620 >> >> IMPORTANT: if you fix the bug, please add the following tag to the commit: >> Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com >> It will help syzbot understand when the bug is fixed. See footer for >> details. >> If you forward the report, please keep this part and the footer. > > > +Eric said that perhaps we just need to revert: > > commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc > Date: Sat May 21 07:16:42 2011 + > ipv4: Give backtrace in ip_rt_bug(). > And David replied : Let's not do the revert, I wouldn't have seen the backtrace which points where this bug is if we had. icmp_route_lookup(), in one branch, does an input route lookup and uses the result of that to send the icmp message. That can't be right, input routes should never be used for transmitting traffice and that's how we end up at ip_rt_bug().
Re: WARNING in ip_rt_bug
On Mon, Apr 9, 2018 at 7:59 AM, syzbotwrote: > Hello, > > syzbot hit the following crash on net-next commit > 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) > Merge tag 'mlx5-updates-2018-03-30' of > git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab > > Unfortunately, I don't have any reproducer for this crash yet. > Raw console output: > https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 > Kernel config: > https://syzkaller.appspot.com/x/.config?id=3327544840960562528 > compiler: gcc (GCC) 7.1.1 20170620 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. +Eric said that perhaps we just need to revert: commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc Date: Sat May 21 07:16:42 2011 + ipv4: Give backtrace in ip_rt_bug(). > netlink: 'syz-executor6': attribute type 3 has an invalid length. > WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 > net/ipv4/route.c:1212 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x24d lib/dump_stack.c:53 > panic+0x1e4/0x41c kernel/panic.c:183 > __warn+0x1dc/0x200 kernel/panic.c:547 > report_bug+0x1f4/0x2b0 lib/bug.c:186 > fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 > fixup_bug arch/x86/kernel/traps.c:247 [inline] > do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 > invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 > RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 > RSP: 0018:8801db007290 EFLAGS: 00010282 > RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca > RDX: 0100 RSI: 8858c300 RDI: 0282 > RBP: 8801db007298 R08: 11003b600de1 R09: > R10: R11: R12: 8801d8dda3c0 > R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 > dst_output include/net/dst.h:444 [inline] > ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 > ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 > ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 > icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 > icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 > ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 > dst_link_failure include/net/dst.h:427 [inline] > arp_error_report+0xae/0x180 net/ipv4/arp.c:297 > neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 > neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 > call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 > expire_timers kernel/time/timer.c:1363 [inline] > __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 > run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 > __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 > invoke_softirq kernel/softirq.c:365 [inline] > irq_exit+0x1cc/0x200 kernel/softirq.c:405 > exiting_irq arch/x86/include/asm/apic.h:541 [inline] > smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 > > RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 > [inline] > RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 > RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 > RAX: dc00 RBX: 8801d225e400 RCX: > RDX: 110a24e5 RSI: b98b8227 RDI: 0282 > RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 > R10: 880197b3f960 R11: 0003 R12: 110032f67f36 > R13: R14: R15: 0001 > down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 > __bprm_mm_init fs/exec.c:297 [inline] > bprm_mm_init fs/exec.c:414 [inline] > do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 > do_execve+0x31/0x40 fs/exec.c:1847 > call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 > Dumping ftrace buffer: >(ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this
Re: WARNING in ip_rt_bug
On Mon, Apr 9, 2018 at 7:59 AM, syzbot wrote: > Hello, > > syzbot hit the following crash on net-next commit > 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) > Merge tag 'mlx5-updates-2018-03-30' of > git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab > > Unfortunately, I don't have any reproducer for this crash yet. > Raw console output: > https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 > Kernel config: > https://syzkaller.appspot.com/x/.config?id=3327544840960562528 > compiler: gcc (GCC) 7.1.1 20170620 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. +Eric said that perhaps we just need to revert: commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc Date: Sat May 21 07:16:42 2011 + ipv4: Give backtrace in ip_rt_bug(). > netlink: 'syz-executor6': attribute type 3 has an invalid length. > WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 > net/ipv4/route.c:1212 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x24d lib/dump_stack.c:53 > panic+0x1e4/0x41c kernel/panic.c:183 > __warn+0x1dc/0x200 kernel/panic.c:547 > report_bug+0x1f4/0x2b0 lib/bug.c:186 > fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 > fixup_bug arch/x86/kernel/traps.c:247 [inline] > do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 > invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 > RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 > RSP: 0018:8801db007290 EFLAGS: 00010282 > RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca > RDX: 0100 RSI: 8858c300 RDI: 0282 > RBP: 8801db007298 R08: 11003b600de1 R09: > R10: R11: R12: 8801d8dda3c0 > R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 > dst_output include/net/dst.h:444 [inline] > ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 > ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 > ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 > icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 > icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 > ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 > dst_link_failure include/net/dst.h:427 [inline] > arp_error_report+0xae/0x180 net/ipv4/arp.c:297 > neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 > neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 > call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 > expire_timers kernel/time/timer.c:1363 [inline] > __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 > run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 > __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 > invoke_softirq kernel/softirq.c:365 [inline] > irq_exit+0x1cc/0x200 kernel/softirq.c:405 > exiting_irq arch/x86/include/asm/apic.h:541 [inline] > smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 > > RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 > [inline] > RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 > RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 > RAX: dc00 RBX: 8801d225e400 RCX: > RDX: 110a24e5 RSI: b98b8227 RDI: 0282 > RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 > R10: 880197b3f960 R11: 0003 R12: 110032f67f36 > R13: R14: R15: 0001 > down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 > __bprm_mm_init fs/exec.c:297 [inline] > bprm_mm_init fs/exec.c:414 [inline] > do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 > do_execve+0x31/0x40 fs/exec.c:1847 > call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 > Dumping ftrace buffer: >(ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title > To mark
WARNING in ip_rt_bug
Hello, syzbot hit the following crash on net-next commit 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) Merge tag 'mlx5-updates-2018-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 Kernel config: https://syzkaller.appspot.com/x/.config?id=3327544840960562528 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. netlink: 'syz-executor6': attribute type 3 has an invalid length. WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 RSP: 0018:8801db007290 EFLAGS: 00010282 RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca RDX: 0100 RSI: 8858c300 RDI: 0282 RBP: 8801db007298 R08: 11003b600de1 R09: R10: R11: R12: 8801d8dda3c0 R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 dst_output include/net/dst.h:444 [inline] ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0xae/0x180 net/ipv4/arp.c:297 neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 RAX: dc00 RBX: 8801d225e400 RCX: RDX: 110a24e5 RSI: b98b8227 RDI: 0282 RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 R10: 880197b3f960 R11: 0003 R12: 110032f67f36 R13: R14: R15: 0001 down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 __bprm_mm_init fs/exec.c:297 [inline] bprm_mm_init fs/exec.c:414 [inline] do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkal...@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
WARNING in ip_rt_bug
Hello, syzbot hit the following crash on net-next commit 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) Merge tag 'mlx5-updates-2018-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 Kernel config: https://syzkaller.appspot.com/x/.config?id=3327544840960562528 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. netlink: 'syz-executor6': attribute type 3 has an invalid length. WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 RSP: 0018:8801db007290 EFLAGS: 00010282 RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca RDX: 0100 RSI: 8858c300 RDI: 0282 RBP: 8801db007298 R08: 11003b600de1 R09: R10: R11: R12: 8801d8dda3c0 R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 dst_output include/net/dst.h:444 [inline] ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0xae/0x180 net/ipv4/arp.c:297 neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 RAX: dc00 RBX: 8801d225e400 RCX: RDX: 110a24e5 RSI: b98b8227 RDI: 0282 RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 R10: 880197b3f960 R11: 0003 R12: 110032f67f36 R13: R14: R15: 0001 down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 __bprm_mm_init fs/exec.c:297 [inline] bprm_mm_init fs/exec.c:414 [inline] do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkal...@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
WARNING in ip_rt_bug
Hello, syzbot hit the following crash on net-next commit 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) Merge tag 'mlx5-updates-2018-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 Kernel config: https://syzkaller.appspot.com/x/.config?id=3327544840960562528 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. netlink: 'syz-executor6': attribute type 3 has an invalid length. WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 RSP: 0018:8801db007290 EFLAGS: 00010282 RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca RDX: 0100 RSI: 8858c300 RDI: 0282 RBP: 8801db007298 R08: 11003b600de1 R09: R10: R11: R12: 8801d8dda3c0 R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 dst_output include/net/dst.h:444 [inline] ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0xae/0x180 net/ipv4/arp.c:297 neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 RAX: dc00 RBX: 8801d225e400 RCX: RDX: 110a24e5 RSI: b98b8227 RDI: 0282 RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 R10: 880197b3f960 R11: 0003 R12: 110032f67f36 R13: R14: R15: 0001 down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 __bprm_mm_init fs/exec.c:297 [inline] bprm_mm_init fs/exec.c:414 [inline] do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkal...@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
WARNING in ip_rt_bug
Hello, syzbot hit the following crash on net-next commit 8bde261e535257e81087d39ff808414e2f5aa39d (Sun Apr 1 02:31:43 2018 +) Merge tag 'mlx5-updates-2018-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b09ac67a2af842b12eab Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5991727739437056 Kernel config: https://syzkaller.appspot.com/x/.config?id=3327544840960562528 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b09ac67a2af842b12...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. netlink: 'syz-executor6': attribute type 3 has an invalid length. WARNING: CPU: 0 PID: 11678 at net/ipv4/route.c:1213 ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11678 Comm: kworker/u4:7 Not tainted 4.16.0-rc6+ #289 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:ip_rt_bug+0x15/0x20 net/ipv4/route.c:1212 RSP: 0018:8801db007290 EFLAGS: 00010282 RAX: dc00 RBX: 8801d8dda3c0 RCX: 856c31ca RDX: 0100 RSI: 8858c300 RDI: 0282 RBP: 8801db007298 R08: 11003b600de1 R09: R10: R11: R12: 8801d8dda3c0 R13: 88019bdb2200 R14: 88019bdeed80 R15: 8801d8dda418 dst_output include/net/dst.h:444 [inline] ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124 ip_send_skb+0x3c/0xc0 net/ipv4/ip_output.c:1414 ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1434 icmp_push_reply+0x395/0x4f0 net/ipv4/icmp.c:394 icmp_send+0x1136/0x19b0 net/ipv4/icmp.c:741 ipv4_link_failure+0x2a/0x1b0 net/ipv4/route.c:1200 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0xae/0x180 net/ipv4/arp.c:297 neigh_invalidate+0x225/0x530 net/core/neighbour.c:883 neigh_timer_handler+0x897/0xd60 net/core/neighbour.c:969 call_timer_fn+0x228/0x820 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3923 RSP: 0018:880197b3f980 EFLAGS: 0282 ORIG_RAX: ff12 RAX: dc00 RBX: 8801d225e400 RCX: RDX: 110a24e5 RSI: b98b8227 RDI: 0282 RBP: 880197b3fa78 R08: 110032f67e93 R09: 0004 R10: 880197b3f960 R11: 0003 R12: 110032f67f36 R13: R14: R15: 0001 down_write_killable+0x8a/0x140 kernel/locking/rwsem.c:84 __bprm_mm_init fs/exec.c:297 [inline] bprm_mm_init fs/exec.c:414 [inline] do_execveat_common.isra.30+0xc8e/0x23c0 fs/exec.c:1771 do_execve+0x31/0x40 fs/exec.c:1847 call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkal...@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.