general protection fault in __bpf_map_put
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syzbot
Jan 10, 2018, 7:58:03 AM1/10/18
to a...@kernel.org, dan...@iogearbox.net, linux-...@vger.kernel.org, net...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzkaller hit the following crash on
b4464bcab38d3f7fe995a7cb960eeac6889bec08
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d2f552...@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.
audit: type=1400 audit(1515571663.627:11): avc: denied { map_read
map_write } for pid=3537 comm="syzkaller597104"
scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf
permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.15.0-rc7-next-20180110+ #93
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: events bpf_map_free_deferred
RIP: 0010:__bpf_map_put+0x64/0x2e0 kernel/bpf/syscall.c:233
RSP: 0018:ffff8801d98b7458 EFLAGS: 00010293
RAX: ffff8801d98ac600 RBX: ad6001bc00000dd1 RCX: ffffffff817e4454
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ad6001bc00000dd1
RBP: ffff8801d98b74e8 R08: 1ffff1003b316e6a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b316e8c
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204f9fe4 CR3: 0000000006822003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_map_put+0x1a/0x20 kernel/bpf/syscall.c:243
bpf_map_fd_put_ptr+0x15/0x20 kernel/bpf/map_in_map.c:96
fd_array_map_delete_elem kernel/bpf/arraymap.c:420 [inline]
bpf_fd_array_map_clear kernel/bpf/arraymap.c:461 [inline]
array_of_map_free+0x100/0x180 kernel/bpf/arraymap.c:618
bpf_map_free_deferred+0xb0/0xe0 kernel/bpf/syscall.c:217
process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2112
worker_thread+0x223/0x1990 kernel/workqueue.c:2246
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x4b/0x60 arch/x86/entry/entry_64.S:547
Code: b5 41 48 c7 45 80 1d 2c 59 86 48 c7 45 88 f0 43 7e 81 c7 00 f1 f1 f1
f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 9c 1e f2 ff <f0> ff 4b 48
74 2f e8 91 1e f2 ff 48 b8 00 00 00 00 00 fc ff df
RIP: __bpf_map_put+0x64/0x2e0 kernel/bpf/syscall.c:233 RSP: ffff8801d98b7458
---[ end trace 61592f27aaa1e096 ]---
Kernel panic - not syncing: Fatal exception
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 syzk...@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
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If you want to test a patch for this bug, please reply with:
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To mark this as a duplicate of another syzbot report, please reply with:
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Note: if the crash happens again, it will cause creation of a new bug
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syzkaller hit the following crash on
b4464bcab38d3f7fe995a7cb960eeac6889bec08
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d2f552...@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.
audit: type=1400 audit(1515571663.627:11): avc: denied { map_read
map_write } for pid=3537 comm="syzkaller597104"
scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf
permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.15.0-rc7-next-20180110+ #93
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: events bpf_map_free_deferred
RIP: 0010:__bpf_map_put+0x64/0x2e0 kernel/bpf/syscall.c:233
RSP: 0018:ffff8801d98b7458 EFLAGS: 00010293
RAX: ffff8801d98ac600 RBX: ad6001bc00000dd1 RCX: ffffffff817e4454
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ad6001bc00000dd1
RBP: ffff8801d98b74e8 R08: 1ffff1003b316e6a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b316e8c
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204f9fe4 CR3: 0000000006822003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_map_put+0x1a/0x20 kernel/bpf/syscall.c:243
bpf_map_fd_put_ptr+0x15/0x20 kernel/bpf/map_in_map.c:96
fd_array_map_delete_elem kernel/bpf/arraymap.c:420 [inline]
bpf_fd_array_map_clear kernel/bpf/arraymap.c:461 [inline]
array_of_map_free+0x100/0x180 kernel/bpf/arraymap.c:618
bpf_map_free_deferred+0xb0/0xe0 kernel/bpf/syscall.c:217
process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2112
worker_thread+0x223/0x1990 kernel/workqueue.c:2246
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x4b/0x60 arch/x86/entry/entry_64.S:547
Code: b5 41 48 c7 45 80 1d 2c 59 86 48 c7 45 88 f0 43 7e 81 c7 00 f1 f1 f1
f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 9c 1e f2 ff <f0> ff 4b 48
74 2f e8 91 1e f2 ff 48 b8 00 00 00 00 00 fc ff df
RIP: __bpf_map_put+0x64/0x2e0 kernel/bpf/syscall.c:233 RSP: ffff8801d98b7458
---[ end trace 61592f27aaa1e096 ]---
Kernel panic - not syncing: Fatal exception
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 syzk...@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
If you want to test a patch for this bug, please reply with:
#syz test: git://repo/address.git branch
and provide the patch inline or as an attachment.
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.
Dmitry Vyukov
Jan 13, 2018, 2:17:07 AM1/13/18
to syzbot, Alexei Starovoitov, Daniel Borkmann, LKML, netdev, syzkall...@googlegroups.com
On Wed, Jan 10, 2018 at 1:58 PM, syzbot
<syzbot+d2f552...@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzkaller hit the following crash on
> b4464bcab38d3f7fe995a7cb960eeac6889bec08
> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached
> Raw console output is attached.
> C reproducer is attached
> syzkaller reproducer is attached. See https://goo.gl/kgGztJ
> for information about syzkaller reproducers
>
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+d2f552...@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.
Daniel, is it the same bug that was fixed by "bpf, array: fix overflow
<syzbot+d2f552...@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzkaller hit the following crash on
> b4464bcab38d3f7fe995a7cb960eeac6889bec08
> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached
> Raw console output is attached.
> C reproducer is attached
> syzkaller reproducer is attached. See https://goo.gl/kgGztJ
> for information about syzkaller reproducers
>
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+d2f552...@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.
in max_entries and undefined behavior in index_mask"?
> You received this message because you are subscribed to the Google Groups
> "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to syzkaller-bug...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/syzkaller-bugs/94eb2c06de30df3d1605626b941b%40google.com.
> For more options, visit https://groups.google.com/d/optout.
Daniel Borkmann
Jan 13, 2018, 7:21:59 PM1/13/18
to Dmitry Vyukov, syzbot, Alexei Starovoitov, LKML, netdev, syzkall...@googlegroups.com
On 01/13/2018 08:16 AM, Dmitry Vyukov wrote:
> On Wed, Jan 10, 2018 at 1:58 PM, syzbot
> <syzbot+d2f552...@syzkaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzkaller hit the following crash on
>> b4464bcab38d3f7fe995a7cb960eeac6889bec08
>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
>> compiler: gcc (GCC) 7.1.1 20170620
>> .config is attached
>> Raw console output is attached.
>> C reproducer is attached
>> syzkaller reproducer is attached. See https://goo.gl/kgGztJ
>> for information about syzkaller reproducers
>>
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+d2f552...@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.
>
> Daniel, is it the same bug that was fixed by "bpf, array: fix overflow
> in max_entries and undefined behavior in index_mask"?
Yes, fixed by:
> On Wed, Jan 10, 2018 at 1:58 PM, syzbot
> <syzbot+d2f552...@syzkaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzkaller hit the following crash on
>> b4464bcab38d3f7fe995a7cb960eeac6889bec08
>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
>> compiler: gcc (GCC) 7.1.1 20170620
>> .config is attached
>> Raw console output is attached.
>> C reproducer is attached
>> syzkaller reproducer is attached. See https://goo.gl/kgGztJ
>> for information about syzkaller reproducers
>>
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+d2f552...@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.
>
> Daniel, is it the same bug that was fixed by "bpf, array: fix overflow
> in max_entries and undefined behavior in index_mask"?
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=bbeb6e4323dad9b5e0ee9f60c223dd532e2403b1
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