general protection fault in ip6_dst_hoplimit
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syzbot
Mar 19, 2019, 5:22:06 AM3/19/19
to da...@davemloft.net, kuz...@ms2.inr.ac.ru, linux-...@vger.kernel.org, net...@vger.kernel.org, syzkall...@googlegroups.com, yosh...@linux-ipv6.org
Hello,
syzbot found the following crash on:
HEAD commit: d9862cfb Merge tag 'mips_5.1' of git://git.kernel.org/pub/..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12747c93200000
kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
dashboard link: https://syzkaller.appspot.com/bug?extid=4c869fc20129562c53fa
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+4c869f...@syzkaller.appspotmail.com
dst_release: dst:00000000f3b89511 refcnt:-2120685656
dst_release: dst:00000000f3b89511 refcnt:-2120685656
IPVS: set_ctl: invalid protocol: 46 0.0.4.1:20003
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14303 Comm: syz-executor.2 Not tainted 5.0.0+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:ip6_dst_hoplimit+0x26/0x3f0 net/ipv6/output_core.c:127
Code: 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 0f 2e 4b fb 48 8d
7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
85 7d 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b
RSP: 0018:ffff888029bb77c8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000004a58 RCX: ffffc9000a21d000
RDX: 000000000000094d RSI: ffffffff86248861 RDI: 0000000000004a68
RBP: ffff888029bb77e0 R08: ffff888096e1e400 R09: ffffed1015d25021
R10: ffffed1015d25bcf R11: ffff8880ae928107 R12: ffff888064f31880
R13: 0000000000004a58 R14: 0000000000000000 R15: ffff888029bb7e20
FS: 00007f66dbd52700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5833499000 CR3: 000000009ae87000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6_sk_dst_hoplimit include/net/ipv6.h:765 [inline]
udpv6_sendmsg+0x23af/0x28d0 net/ipv6/udp.c:1459
inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:632
___sys_sendmsg+0x806/0x930 net/socket.c:2137
__sys_sendmsg+0x105/0x1d0 net/socket.c:2175
__do_sys_sendmsg net/socket.c:2184 [inline]
__se_sys_sendmsg net/socket.c:2182 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2182
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
kobject: 'loop5' (000000000bae834e): kobject_uevent_env
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458079
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f66dbd51c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
kobject: 'loop5' (000000000bae834e): fill_kobj_path: path
= '/devices/virtual/block/loop5'
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458079
RDX: 0000000000000000 RSI: 0000000020002b80 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f66dbd526d4
R13: 00000000004c5601 R14: 00000000004d94a8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop4' (0000000057f28e01): kobject_uevent_env
---[ end trace ad1e9a18c63dc6fd ]---
kobject: 'ip6gre0' (00000000482f98f6): kobject_cleanup, parent
(null)
RIP: 0010:ip6_dst_hoplimit+0x26/0x3f0 net/ipv6/output_core.c:127
kobject: 'loop4' (0000000057f28e01): fill_kobj_path: path
= '/devices/virtual/block/loop4'
Code: 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 0f 2e 4b fb 48 8d
7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
85 7d 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b
kobject: 'ip6gre0' (00000000482f98f6): auto cleanup 'remove' event
RSP: 0018:ffff888029bb77c8 EFLAGS: 00010206
kobject: 'loop3' (000000006d432d43): kobject_uevent_env
RAX: dffffc0000000000 RBX: 0000000000004a58 RCX: ffffc9000a21d000
kobject: 'ip6gre0' (00000000482f98f6): kobject_uevent_env
RDX: 000000000000094d RSI: ffffffff86248861 RDI: 0000000000004a68
kobject: 'loop3' (000000006d432d43): fill_kobj_path: path
= '/devices/virtual/block/loop3'
RBP: ffff888029bb77e0 R08: ffff888096e1e400 R09: ffffed1015d25021
kobject: 'ip6gre0' (00000000482f98f6): kobject_uevent_env: uevent_suppress
caused the event to drop!
R10: ffffed1015d25bcf R11: ffff8880ae928107 R12: ffff888064f31880
kobject: 'ip6gre0' (00000000482f98f6): calling ktype release
R13: 0000000000004a58 R14: 0000000000000000 R15: ffff888029bb7e20
kobject: 'ip6gre0': free name
FS: 00007f66dbd52700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 000000009ae87000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'rx-0' (00000000e6299323): kobject_cleanup, parent 000000006ae1d517
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot found the following crash on:
HEAD commit: d9862cfb Merge tag 'mips_5.1' of git://git.kernel.org/pub/..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12747c93200000
kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
dashboard link: https://syzkaller.appspot.com/bug?extid=4c869fc20129562c53fa
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+4c869f...@syzkaller.appspotmail.com
dst_release: dst:00000000f3b89511 refcnt:-2120685656
dst_release: dst:00000000f3b89511 refcnt:-2120685656
IPVS: set_ctl: invalid protocol: 46 0.0.4.1:20003
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14303 Comm: syz-executor.2 Not tainted 5.0.0+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:ip6_dst_hoplimit+0x26/0x3f0 net/ipv6/output_core.c:127
Code: 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 0f 2e 4b fb 48 8d
7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
85 7d 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b
RSP: 0018:ffff888029bb77c8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000004a58 RCX: ffffc9000a21d000
RDX: 000000000000094d RSI: ffffffff86248861 RDI: 0000000000004a68
RBP: ffff888029bb77e0 R08: ffff888096e1e400 R09: ffffed1015d25021
R10: ffffed1015d25bcf R11: ffff8880ae928107 R12: ffff888064f31880
R13: 0000000000004a58 R14: 0000000000000000 R15: ffff888029bb7e20
FS: 00007f66dbd52700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5833499000 CR3: 000000009ae87000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6_sk_dst_hoplimit include/net/ipv6.h:765 [inline]
udpv6_sendmsg+0x23af/0x28d0 net/ipv6/udp.c:1459
inet_sendmsg+0x147/0x5d0 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:632
___sys_sendmsg+0x806/0x930 net/socket.c:2137
__sys_sendmsg+0x105/0x1d0 net/socket.c:2175
__do_sys_sendmsg net/socket.c:2184 [inline]
__se_sys_sendmsg net/socket.c:2182 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2182
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
kobject: 'loop5' (000000000bae834e): kobject_uevent_env
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458079
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f66dbd51c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
kobject: 'loop5' (000000000bae834e): fill_kobj_path: path
= '/devices/virtual/block/loop5'
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458079
RDX: 0000000000000000 RSI: 0000000020002b80 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f66dbd526d4
R13: 00000000004c5601 R14: 00000000004d94a8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop4' (0000000057f28e01): kobject_uevent_env
---[ end trace ad1e9a18c63dc6fd ]---
kobject: 'ip6gre0' (00000000482f98f6): kobject_cleanup, parent
(null)
RIP: 0010:ip6_dst_hoplimit+0x26/0x3f0 net/ipv6/output_core.c:127
kobject: 'loop4' (0000000057f28e01): fill_kobj_path: path
= '/devices/virtual/block/loop4'
Code: 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 0f 2e 4b fb 48 8d
7b 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
85 7d 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b
kobject: 'ip6gre0' (00000000482f98f6): auto cleanup 'remove' event
RSP: 0018:ffff888029bb77c8 EFLAGS: 00010206
kobject: 'loop3' (000000006d432d43): kobject_uevent_env
RAX: dffffc0000000000 RBX: 0000000000004a58 RCX: ffffc9000a21d000
kobject: 'ip6gre0' (00000000482f98f6): kobject_uevent_env
RDX: 000000000000094d RSI: ffffffff86248861 RDI: 0000000000004a68
kobject: 'loop3' (000000006d432d43): fill_kobj_path: path
= '/devices/virtual/block/loop3'
RBP: ffff888029bb77e0 R08: ffff888096e1e400 R09: ffffed1015d25021
kobject: 'ip6gre0' (00000000482f98f6): kobject_uevent_env: uevent_suppress
caused the event to drop!
R10: ffffed1015d25bcf R11: ffff8880ae928107 R12: ffff888064f31880
kobject: 'ip6gre0' (00000000482f98f6): calling ktype release
R13: 0000000000004a58 R14: 0000000000000000 R15: ffff888029bb7e20
kobject: 'ip6gre0': free name
FS: 00007f66dbd52700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 000000009ae87000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'rx-0' (00000000e6299323): kobject_cleanup, parent 000000006ae1d517
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
Dmitry Vyukov
Apr 29, 2019, 2:55:02 AM4/29/19
to syzbot, David Miller, Alexey Kuznetsov, LKML, netdev, syzkaller-bugs, Hideaki YOSHIFUJI, Eric Dumazet
On Tue, Mar 19, 2019 at 10:22 AM syzbot
<syzbot+4c869f...@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: d9862cfb Merge tag 'mips_5.1' of git://git.kernel.org/pub/..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=12747c93200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
> dashboard link: https://syzkaller.appspot.com/bug?extid=4c869fc20129562c53fa
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+4c869f...@syzkaller.appspotmail.com
Eric, searching the dashboard for "ip6_dst" I've also found this. Can
<syzbot+4c869f...@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: d9862cfb Merge tag 'mips_5.1' of git://git.kernel.org/pub/..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=12747c93200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=73d88a42238825ad
> dashboard link: https://syzkaller.appspot.com/bug?extid=4c869fc20129562c53fa
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+4c869f...@syzkaller.appspotmail.com
this be fixed by your "ipv6: fix races in ip6_dst_destroy()"?
https://patchwork.ozlabs.org/patch/1092328/
If there is some chance that it is fixed by your patch, then it may be
better to mark it as fixed because there does not seem to be any other
hypothesis.
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> For more options, visit https://groups.google.com/d/optout.
syzbot
Sep 10, 2019, 2:18:05 PM9/10/19
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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