* general protection fault in tc_ctl_chain
@ 2019-02-13 17:56 syzbot
2019-02-18 20:02 ` Cong Wang
0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2019-02-13 17:56 UTC (permalink / raw)
To: davem, jhs, jiri, linux-kernel, netdev, syzkaller-bugs, xiyou.wangcong
Hello,
syzbot found the following crash on:
HEAD commit: bd3606c29fcc rocker: Remove port_attr_bridge_flags_get ass..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=121bbf87400000
kernel config: https://syzkaller.appspot.com/x/.config?x=8572a6e4661225f4
dashboard link: https://syzkaller.appspot.com/bug?extid=eff9cae063e4b633c6c1
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11cbd404c00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17fc80d4c00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com
audit: type=1800 audit(1550028783.638:30): pid=7517 uid=0 auid=4294967295
ses=4294967295 subj==unconfined op=collect_data cause=failed(directio)
comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
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: 0 PID: 7669 Comm: syz-executor789 Not tainted 5.0.0-rc5+ #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
Call Trace:
lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
__mutex_lock_common kernel/locking/mutex.c:925 [inline]
__mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
tc_ctl_chain+0x42f/0x11a0 net/sched/cls_api.c:2812
rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192
netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485
rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:631
___sys_sendmsg+0x806/0x930 net/socket.c:2136
__sys_sendmsg+0x105/0x1d0 net/socket.c:2174
__do_sys_sendmsg net/socket.c:2183 [inline]
__se_sys_sendmsg net/socket.c:2181 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2181
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4400d9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd09281608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401960
R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 25ab48d993ef9249 ]---
RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
---
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 syzkaller@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 can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: general protection fault in tc_ctl_chain
2019-02-13 17:56 general protection fault in tc_ctl_chain syzbot
@ 2019-02-18 20:02 ` Cong Wang
2019-02-19 9:10 ` Vlad Buslov
0 siblings, 1 reply; 4+ messages in thread
From: Cong Wang @ 2019-02-18 20:02 UTC (permalink / raw)
To: syzbot
Cc: David Miller, Jamal Hadi Salim, Jiri Pirko, LKML,
Linux Kernel Network Developers, syzkaller-bugs, Vlad Buslov
(Cc'ing Vlad, please fix it)
On Wed, Feb 13, 2019 at 9:56 AM syzbot
<syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: bd3606c29fcc rocker: Remove port_attr_bridge_flags_get ass..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=121bbf87400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=8572a6e4661225f4
> dashboard link: https://syzkaller.appspot.com/bug?extid=eff9cae063e4b633c6c1
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11cbd404c00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17fc80d4c00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com
>
> audit: type=1800 audit(1550028783.638:30): pid=7517 uid=0 auid=4294967295
> ses=4294967295 subj==unconfined op=collect_data cause=failed(directio)
> comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
> 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: 0 PID: 7669 Comm: syz-executor789 Not tainted 5.0.0-rc5+ #60
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
> Call Trace:
> lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
> __mutex_lock_common kernel/locking/mutex.c:925 [inline]
> __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
> mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
> tc_ctl_chain+0x42f/0x11a0 net/sched/cls_api.c:2812
> rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192
> netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485
> rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210
> netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
> netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336
> netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925
> sock_sendmsg_nosec net/socket.c:621 [inline]
> sock_sendmsg+0xdd/0x130 net/socket.c:631
> ___sys_sendmsg+0x806/0x930 net/socket.c:2136
> __sys_sendmsg+0x105/0x1d0 net/socket.c:2174
> __do_sys_sendmsg net/socket.c:2183 [inline]
> __se_sys_sendmsg net/socket.c:2181 [inline]
> __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2181
> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x4400d9
> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007ffd09281608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
> RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
> RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401960
> R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
> Modules linked in:
> ---[ end trace 25ab48d993ef9249 ]---
> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
>
>
> ---
> 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 syzkaller@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 can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: general protection fault in tc_ctl_chain
2019-02-18 20:02 ` Cong Wang
@ 2019-02-19 9:10 ` Vlad Buslov
2019-02-19 9:15 ` Dmitry Vyukov
0 siblings, 1 reply; 4+ messages in thread
From: Vlad Buslov @ 2019-02-19 9:10 UTC (permalink / raw)
To: Cong Wang
Cc: syzbot, David Miller, Jamal Hadi Salim, Jiri Pirko, LKML,
Linux Kernel Network Developers, syzkaller-bugs
This is fixed by Dan Carpenter's patch "net: sched: potential NULL
dereference in tcf_block_find()" that was submitted yesterday.
On Mon 18 Feb 2019 at 20:02, Cong Wang <xiyou.wangcong@gmail.com> wrote:
> (Cc'ing Vlad, please fix it)
>
> On Wed, Feb 13, 2019 at 9:56 AM syzbot
> <syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com> wrote:
>>
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit: bd3606c29fcc rocker: Remove port_attr_bridge_flags_get ass..
>> git tree: net-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=121bbf87400000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=8572a6e4661225f4
>> dashboard link: https://syzkaller.appspot.com/bug?extid=eff9cae063e4b633c6c1
>> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11cbd404c00000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17fc80d4c00000
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com
>>
>> audit: type=1800 audit(1550028783.638:30): pid=7517 uid=0 auid=4294967295
>> ses=4294967295 subj==unconfined op=collect_data cause=failed(directio)
>> comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
>> 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: 0 PID: 7669 Comm: syz-executor789 Not tainted 5.0.0-rc5+ #60
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> Google 01/01/2011
>> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
>> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
>> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
>> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
>> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
>> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
>> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
>> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
>> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
>> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
>> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
>> Call Trace:
>> lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
>> __mutex_lock_common kernel/locking/mutex.c:925 [inline]
>> __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
>> mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
>> tc_ctl_chain+0x42f/0x11a0 net/sched/cls_api.c:2812
>> rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192
>> netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485
>> rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210
>> netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
>> netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336
>> netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925
>> sock_sendmsg_nosec net/socket.c:621 [inline]
>> sock_sendmsg+0xdd/0x130 net/socket.c:631
>> ___sys_sendmsg+0x806/0x930 net/socket.c:2136
>> __sys_sendmsg+0x105/0x1d0 net/socket.c:2174
>> __do_sys_sendmsg net/socket.c:2183 [inline]
>> __se_sys_sendmsg net/socket.c:2181 [inline]
>> __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2181
>> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
>> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>> RIP: 0033:0x4400d9
>> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
>> RSP: 002b:00007ffd09281608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
>> RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
>> RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
>> RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
>> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401960
>> R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
>> Modules linked in:
>> ---[ end trace 25ab48d993ef9249 ]---
>> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
>> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
>> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
>> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
>> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
>> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
>> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
>> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
>> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
>> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
>> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
>>
>>
>> ---
>> 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 syzkaller@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 can test patches for this bug, for details see:
>> https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: general protection fault in tc_ctl_chain
2019-02-19 9:10 ` Vlad Buslov
@ 2019-02-19 9:15 ` Dmitry Vyukov
0 siblings, 0 replies; 4+ messages in thread
From: Dmitry Vyukov @ 2019-02-19 9:15 UTC (permalink / raw)
To: Vlad Buslov, Dan Carpenter
Cc: Cong Wang, syzbot, David Miller, Jamal Hadi Salim, Jiri Pirko,
LKML, Linux Kernel Network Developers, syzkaller-bugs
On Tue, Feb 19, 2019 at 10:10 AM Vlad Buslov <vladbu@mellanox.com> wrote:
>
> This is fixed by Dan Carpenter's patch "net: sched: potential NULL
> dereference in tcf_block_find()" that was submitted yesterday.
+Dan
Let's tell syzbot that this is fixed:
#syz fix: net: sched: potential NULL dereference in tcf_block_find()
> On Mon 18 Feb 2019 at 20:02, Cong Wang <xiyou.wangcong@gmail.com> wrote:
> > (Cc'ing Vlad, please fix it)
> >
> > On Wed, Feb 13, 2019 at 9:56 AM syzbot
> > <syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com> wrote:
> >>
> >> Hello,
> >>
> >> syzbot found the following crash on:
> >>
> >> HEAD commit: bd3606c29fcc rocker: Remove port_attr_bridge_flags_get ass..
> >> git tree: net-next
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=121bbf87400000
> >> kernel config: https://syzkaller.appspot.com/x/.config?x=8572a6e4661225f4
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=eff9cae063e4b633c6c1
> >> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11cbd404c00000
> >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17fc80d4c00000
> >>
> >> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> >> Reported-by: syzbot+eff9cae063e4b633c6c1@syzkaller.appspotmail.com
> >>
> >> audit: type=1800 audit(1550028783.638:30): pid=7517 uid=0 auid=4294967295
> >> ses=4294967295 subj==unconfined op=collect_data cause=failed(directio)
> >> comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
> >> 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: 0 PID: 7669 Comm: syz-executor789 Not tainted 5.0.0-rc5+ #60
> >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> >> Google 01/01/2011
> >> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
> >> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
> >> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
> >> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
> >> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
> >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
> >> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
> >> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
> >> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
> >> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
> >> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
> >> Call Trace:
> >> lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
> >> __mutex_lock_common kernel/locking/mutex.c:925 [inline]
> >> __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
> >> mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
> >> tc_ctl_chain+0x42f/0x11a0 net/sched/cls_api.c:2812
> >> rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192
> >> netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485
> >> rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210
> >> netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
> >> netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336
> >> netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925
> >> sock_sendmsg_nosec net/socket.c:621 [inline]
> >> sock_sendmsg+0xdd/0x130 net/socket.c:631
> >> ___sys_sendmsg+0x806/0x930 net/socket.c:2136
> >> __sys_sendmsg+0x105/0x1d0 net/socket.c:2174
> >> __do_sys_sendmsg net/socket.c:2183 [inline]
> >> __se_sys_sendmsg net/socket.c:2181 [inline]
> >> __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2181
> >> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
> >> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> >> RIP: 0033:0x4400d9
> >> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
> >> RSP: 002b:00007ffd09281608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> >> RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9
> >> RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
> >> RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
> >> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401960
> >> R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000
> >> Modules linked in:
> >> ---[ end trace 25ab48d993ef9249 ]---
> >> RIP: 0010:__lock_acquire+0x8df/0x4700 kernel/locking/lockdep.c:3215
> >> Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f
> >> 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f
> >> 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8
> >> RSP: 0018:ffff88808b44f180 EFLAGS: 00010006
> >> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
> >> RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060
> >> RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001
> >> R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060
> >> R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680
> >> FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >> CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0
> >>
> >>
> >> ---
> >> 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 syzkaller@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 can test patches for this bug, for details see:
> >> https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-02-19 9:15 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-13 17:56 general protection fault in tc_ctl_chain syzbot
2019-02-18 20:02 ` Cong Wang
2019-02-19 9:10 ` Vlad Buslov
2019-02-19 9:15 ` Dmitry Vyukov
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