* KASAN: slab-out-of-bounds Write in process_preds
@ 2018-04-11 12:02 syzbot
2018-05-10 5:14 ` Dmitry Vyukov
0 siblings, 1 reply; 7+ messages in thread
From: syzbot @ 2018-04-11 12:02 UTC (permalink / raw)
To: linux-kernel, mingo, rostedt, syzkaller-bugs
Hello,
syzbot hit the following crash on upstream commit
b284d4d5a6785f8cd07eda2646a95782373cd01e (Tue Apr 10 19:25:30 2018 +0000)
Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client
syzbot dashboard link:
https://syzkaller.appspot.com/bug?extid=5702a7e6d4a13b3accd5
So far this crash happened 4 times on upstream.
C reproducer: https://syzkaller.appspot.com/x/repro.c?id=6364313065357312
syzkaller reproducer:
https://syzkaller.appspot.com/x/repro.syz?id=4775648954417152
Raw console output:
https://syzkaller.appspot.com/x/log.txt?id=6353070183153664
Kernel config:
https://syzkaller.appspot.com/x/.config?id=-1223000601505858474
compiler: gcc (GCC) 8.0.1 20180301 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
==================================================================
BUG: KASAN: slab-out-of-bounds in predicate_parse
kernel/trace/trace_events_filter.c:557 [inline]
BUG: KASAN: slab-out-of-bounds in process_preds+0x1958/0x19b0
kernel/trace/trace_events_filter.c:1505
Write of size 4 at addr ffff8801ceecdef0 by task syzkaller992239/4513
CPU: 0 PID: 4513 Comm: syzkaller992239 Not tainted 4.16.0+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
print_address_description+0x6c/0x20b mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
__asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437
predicate_parse kernel/trace/trace_events_filter.c:557 [inline]
process_preds+0x1958/0x19b0 kernel/trace/trace_events_filter.c:1505
create_filter+0x1a8/0x370 kernel/trace/trace_events_filter.c:1714
ftrace_profile_set_filter+0x109/0x2b0
kernel/trace/trace_events_filter.c:2042
perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9064
_perf_ioctl+0x84c/0x1650 kernel/events/core.c:5056
perf_ioctl+0x59/0x80 kernel/events/core.c:5107
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x1cf/0x1650 fs/ioctl.c:684
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
SYSC_ioctl fs/ioctl.c:708 [inline]
SyS_ioctl+0x24/0x30 fs/ioctl.c:706
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x43fdb9
RSP: 002b:00007ffc7afb3e88 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9
RDX: 0000000020000040 RSI: 0000000040082406 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004016e0
R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 1:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620
kmalloc include/linux/slab.h:512 [inline]
call_modprobe kernel/kmod.c:80 [inline]
__request_module+0x386/0xcdd kernel/kmod.c:171
adfdrv_init+0x1b/0x5f drivers/crypto/qat/qat_dh895xcc/adf_drv.c:315
do_one_initcall+0x127/0x913 init/main.c:880
do_initcall_level init/main.c:948 [inline]
do_initcalls init/main.c:956 [inline]
do_basic_setup init/main.c:974 [inline]
kernel_init_freeable+0x49b/0x58e init/main.c:1124
kernel_init+0x11/0x1b3 init/main.c:1050
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
Freed by task 1:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3498 [inline]
kfree+0xd9/0x260 mm/slab.c:3813
free_modprobe_argv+0x74/0xa0 kernel/kmod.c:67
call_usermodehelper_freeinfo kernel/umh.c:42 [inline]
call_usermodehelper_exec+0x274/0x4f0 kernel/umh.c:458
call_modprobe kernel/kmod.c:99 [inline]
__request_module+0x4ba/0xcdd kernel/kmod.c:171
adfdrv_init+0x1b/0x5f drivers/crypto/qat/qat_dh895xcc/adf_drv.c:315
do_one_initcall+0x127/0x913 init/main.c:880
do_initcall_level init/main.c:948 [inline]
do_initcalls init/main.c:956 [inline]
do_basic_setup init/main.c:974 [inline]
kernel_init_freeable+0x49b/0x58e init/main.c:1124
kernel_init+0x11/0x1b3 init/main.c:1050
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
The buggy address belongs to the object at ffff8801ceecde80
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 48 bytes to the right of
64-byte region [ffff8801ceecde80, ffff8801ceecdec0)
The buggy address belongs to the page:
page:ffffea00073bb340 count:1 mapcount:0 mapping:ffff8801ceecd000 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801ceecd000 0000000000000000 0000000100000020
raw: ffffea0007392ba0 ffffea0007509220 ffff8801dac00340 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801ceecdd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff8801ceecde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
> ffff8801ceecde80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff8801ceecdf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
ffff8801ceecdf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzkaller@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.
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-04-11 12:02 KASAN: slab-out-of-bounds Write in process_preds syzbot
@ 2018-05-10 5:14 ` Dmitry Vyukov
2018-05-10 14:23 ` Steven Rostedt
0 siblings, 1 reply; 7+ messages in thread
From: Dmitry Vyukov @ 2018-05-10 5:14 UTC (permalink / raw)
To: syzbot; +Cc: LKML, Ingo Molnar, Steven Rostedt, syzkaller-bugs, Al Viro
On Wed, Apr 11, 2018 at 2:02 PM, syzbot
<syzbot+5702a7e6d4a13b3accd5@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot hit the following crash on upstream commit
> b284d4d5a6785f8cd07eda2646a95782373cd01e (Tue Apr 10 19:25:30 2018 +0000)
> Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client
> syzbot dashboard link:
> https://syzkaller.appspot.com/bug?extid=5702a7e6d4a13b3accd5
>
> So far this crash happened 4 times on upstream.
> C reproducer: https://syzkaller.appspot.com/x/repro.c?id=6364313065357312
> syzkaller reproducer:
> https://syzkaller.appspot.com/x/repro.syz?id=4775648954417152
> Raw console output:
> https://syzkaller.appspot.com/x/log.txt?id=6353070183153664
> Kernel config:
> https://syzkaller.appspot.com/x/.config?id=-1223000601505858474
> compiler: gcc (GCC) 8.0.1 20180301 (experimental)
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
This was bisected to:
commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
Date: Fri Mar 9 13:19:28 2018 -0500
tracing: Rewrite filter logic to be simpler and faster
> ==================================================================
> BUG: KASAN: slab-out-of-bounds in predicate_parse
> kernel/trace/trace_events_filter.c:557 [inline]
> BUG: KASAN: slab-out-of-bounds in process_preds+0x1958/0x19b0
> kernel/trace/trace_events_filter.c:1505
> Write of size 4 at addr ffff8801ceecdef0 by task syzkaller992239/4513
>
> CPU: 0 PID: 4513 Comm: syzkaller992239 Not tainted 4.16.0+ #17
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Call Trace:
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x1b9/0x294 lib/dump_stack.c:113
> print_address_description+0x6c/0x20b mm/kasan/report.c:256
> kasan_report_error mm/kasan/report.c:354 [inline]
> kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
> __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437
> predicate_parse kernel/trace/trace_events_filter.c:557 [inline]
> process_preds+0x1958/0x19b0 kernel/trace/trace_events_filter.c:1505
> create_filter+0x1a8/0x370 kernel/trace/trace_events_filter.c:1714
> ftrace_profile_set_filter+0x109/0x2b0
> kernel/trace/trace_events_filter.c:2042
> perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9064
> _perf_ioctl+0x84c/0x1650 kernel/events/core.c:5056
> perf_ioctl+0x59/0x80 kernel/events/core.c:5107
> vfs_ioctl fs/ioctl.c:46 [inline]
> file_ioctl fs/ioctl.c:500 [inline]
> do_vfs_ioctl+0x1cf/0x1650 fs/ioctl.c:684
> ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
> SYSC_ioctl fs/ioctl.c:708 [inline]
> SyS_ioctl+0x24/0x30 fs/ioctl.c:706
> do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
> entry_SYSCALL_64_after_hwframe+0x42/0xb7
> RIP: 0033:0x43fdb9
> RSP: 002b:00007ffc7afb3e88 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9
> RDX: 0000000020000040 RSI: 0000000040082406 RDI: 0000000000000003
> RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
> R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004016e0
> R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000
>
> Allocated by task 1:
> save_stack+0x43/0xd0 mm/kasan/kasan.c:448
> set_track mm/kasan/kasan.c:460 [inline]
> kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
> kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620
> kmalloc include/linux/slab.h:512 [inline]
> call_modprobe kernel/kmod.c:80 [inline]
> __request_module+0x386/0xcdd kernel/kmod.c:171
> adfdrv_init+0x1b/0x5f drivers/crypto/qat/qat_dh895xcc/adf_drv.c:315
> do_one_initcall+0x127/0x913 init/main.c:880
> do_initcall_level init/main.c:948 [inline]
> do_initcalls init/main.c:956 [inline]
> do_basic_setup init/main.c:974 [inline]
> kernel_init_freeable+0x49b/0x58e init/main.c:1124
> kernel_init+0x11/0x1b3 init/main.c:1050
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
>
> Freed by task 1:
> save_stack+0x43/0xd0 mm/kasan/kasan.c:448
> set_track mm/kasan/kasan.c:460 [inline]
> __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
> kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
> __cache_free mm/slab.c:3498 [inline]
> kfree+0xd9/0x260 mm/slab.c:3813
> free_modprobe_argv+0x74/0xa0 kernel/kmod.c:67
> call_usermodehelper_freeinfo kernel/umh.c:42 [inline]
> call_usermodehelper_exec+0x274/0x4f0 kernel/umh.c:458
> call_modprobe kernel/kmod.c:99 [inline]
> __request_module+0x4ba/0xcdd kernel/kmod.c:171
> adfdrv_init+0x1b/0x5f drivers/crypto/qat/qat_dh895xcc/adf_drv.c:315
> do_one_initcall+0x127/0x913 init/main.c:880
> do_initcall_level init/main.c:948 [inline]
> do_initcalls init/main.c:956 [inline]
> do_basic_setup init/main.c:974 [inline]
> kernel_init_freeable+0x49b/0x58e init/main.c:1124
> kernel_init+0x11/0x1b3 init/main.c:1050
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411
>
> The buggy address belongs to the object at ffff8801ceecde80
> which belongs to the cache kmalloc-64 of size 64
> The buggy address is located 48 bytes to the right of
> 64-byte region [ffff8801ceecde80, ffff8801ceecdec0)
> The buggy address belongs to the page:
> page:ffffea00073bb340 count:1 mapcount:0 mapping:ffff8801ceecd000 index:0x0
> flags: 0x2fffc0000000100(slab)
> raw: 02fffc0000000100 ffff8801ceecd000 0000000000000000 0000000100000020
> raw: ffffea0007392ba0 ffffea0007509220 ffff8801dac00340 0000000000000000
> page dumped because: kasan: bad access detected
>
> Memory state around the buggy address:
> ffff8801ceecdd80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
> ffff8801ceecde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>>
>> ffff8801ceecde80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>
> ^
> ffff8801ceecdf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
> ffff8801ceecdf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
> ==================================================================
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzkaller@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.
>
> --
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^ permalink raw reply [flat|nested] 7+ messages in thread* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-05-10 5:14 ` Dmitry Vyukov
@ 2018-05-10 14:23 ` Steven Rostedt
2018-05-11 13:52 ` Dmitry Vyukov
2018-08-23 14:13 ` Dmitry Vyukov
0 siblings, 2 replies; 7+ messages in thread
From: Steven Rostedt @ 2018-05-10 14:23 UTC (permalink / raw)
To: Dmitry Vyukov; +Cc: syzbot, LKML, Ingo Molnar, syzkaller-bugs, Al Viro
On Thu, 10 May 2018 07:14:26 +0200
Dmitry Vyukov <dvyukov@google.com> wrote:
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
>
>
> This was bisected to:
>
> commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
> Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
> Date: Fri Mar 9 13:19:28 2018 -0500
>
> tracing: Rewrite filter logic to be simpler and faster
I could have told you that without the bisect ;-)
I'll try to get some time to look into this.
-- Steve
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-05-10 14:23 ` Steven Rostedt
@ 2018-05-11 13:52 ` Dmitry Vyukov
2018-08-23 14:13 ` Dmitry Vyukov
1 sibling, 0 replies; 7+ messages in thread
From: Dmitry Vyukov @ 2018-05-11 13:52 UTC (permalink / raw)
To: Steven Rostedt; +Cc: syzbot, LKML, Ingo Molnar, syzkaller-bugs, Al Viro
On Thu, May 10, 2018 at 4:23 PM, Steven Rostedt <rostedt@goodmis.org> wrote:
> On Thu, 10 May 2018 07:14:26 +0200
> Dmitry Vyukov <dvyukov@google.com> wrote:
>
>> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> > Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
>>
>>
>> This was bisected to:
>>
>> commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
>> Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
>> Date: Fri Mar 9 13:19:28 2018 -0500
>>
>> tracing: Rewrite filter logic to be simpler and faster
>
> I could have told you that without the bisect ;-)
Well, it was a good candidate for testing of automatic bisection process ;)
It seems that it has found the right one, which is good.
> I'll try to get some time to look into this.
>
> -- Steve
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-05-10 14:23 ` Steven Rostedt
2018-05-11 13:52 ` Dmitry Vyukov
@ 2018-08-23 14:13 ` Dmitry Vyukov
2018-08-24 1:03 ` Steven Rostedt
1 sibling, 1 reply; 7+ messages in thread
From: Dmitry Vyukov @ 2018-08-23 14:13 UTC (permalink / raw)
To: Steven Rostedt; +Cc: syzbot, LKML, Ingo Molnar, syzkaller-bugs, Al Viro
On Thu, May 10, 2018 at 7:23 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
> On Thu, 10 May 2018 07:14:26 +0200
> Dmitry Vyukov <dvyukov@google.com> wrote:
>
>> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> > Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
>>
>>
>> This was bisected to:
>>
>> commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
>> Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
>> Date: Fri Mar 9 13:19:28 2018 -0500
>>
>> tracing: Rewrite filter logic to be simpler and faster
>
> I could have told you that without the bisect ;-)
>
> I'll try to get some time to look into this.
It seems this was lost on kernel mailing lists, then re-reported after 2 months:
https://bugzilla.kernel.org/show_bug.cgi?id=200019
and then fixed.
Since the fixing commit does not contain syzbot tag, need to tell it
about the fix manually:
#syz fix: tracing: Check for no filter when processing event filters
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-08-23 14:13 ` Dmitry Vyukov
@ 2018-08-24 1:03 ` Steven Rostedt
2018-08-24 17:46 ` Dmitry Vyukov
0 siblings, 1 reply; 7+ messages in thread
From: Steven Rostedt @ 2018-08-24 1:03 UTC (permalink / raw)
To: Dmitry Vyukov; +Cc: syzbot, LKML, Ingo Molnar, syzkaller-bugs, Al Viro
On Thu, 23 Aug 2018 07:13:13 -0700
Dmitry Vyukov <dvyukov@google.com> wrote:
> On Thu, May 10, 2018 at 7:23 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
> > On Thu, 10 May 2018 07:14:26 +0200
> > Dmitry Vyukov <dvyukov@google.com> wrote:
> >
> >> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> >> > Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
> >>
> >>
> >> This was bisected to:
> >>
> >> commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
> >> Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
> >> Date: Fri Mar 9 13:19:28 2018 -0500
> >>
> >> tracing: Rewrite filter logic to be simpler and faster
> >
> > I could have told you that without the bisect ;-)
> >
> > I'll try to get some time to look into this.
>
>
> It seems this was lost on kernel mailing lists, then re-reported after 2 months:
> https://bugzilla.kernel.org/show_bug.cgi?id=200019
> and then fixed.
Yeah, that time was quite busy for me. I guess I failed to get time to
look into it when it was first reported :-(
>
> Since the fixing commit does not contain syzbot tag, need to tell it
> about the fix manually:
>
> #syz fix: tracing: Check for no filter when processing event filters
Sorry about that. Thanks,
-- Steve
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: KASAN: slab-out-of-bounds Write in process_preds
2018-08-24 1:03 ` Steven Rostedt
@ 2018-08-24 17:46 ` Dmitry Vyukov
0 siblings, 0 replies; 7+ messages in thread
From: Dmitry Vyukov @ 2018-08-24 17:46 UTC (permalink / raw)
To: Steven Rostedt; +Cc: syzbot, LKML, Ingo Molnar, syzkaller-bugs, Al Viro
On Thu, Aug 23, 2018 at 6:03 PM, Steven Rostedt <rostedt@goodmis.org> wrote:
> On Thu, 23 Aug 2018 07:13:13 -0700
> Dmitry Vyukov <dvyukov@google.com> wrote:
>
>> On Thu, May 10, 2018 at 7:23 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
>> > On Thu, 10 May 2018 07:14:26 +0200
>> > Dmitry Vyukov <dvyukov@google.com> wrote:
>> >
>> >> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> >> > Reported-by: syzbot+5702a7e6d4a13b3accd5@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.
>> >>
>> >>
>> >> This was bisected to:
>> >>
>> >> commit 80765597bc587feae8dbc8ce97a0f32e12a6e625
>> >> Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
>> >> Date: Fri Mar 9 13:19:28 2018 -0500
>> >>
>> >> tracing: Rewrite filter logic to be simpler and faster
>> >
>> > I could have told you that without the bisect ;-)
>> >
>> > I'll try to get some time to look into this.
>>
>>
>> It seems this was lost on kernel mailing lists, then re-reported after 2 months:
>> https://bugzilla.kernel.org/show_bug.cgi?id=200019
>> and then fixed.
>
> Yeah, that time was quite busy for me. I guess I failed to get time to
> look into it when it was first reported :-(
>
>>
>> Since the fixing commit does not contain syzbot tag, need to tell it
>> about the fix manually:
>>
>> #syz fix: tracing: Check for no filter when processing event filters
>
> Sorry about that. Thanks,
Hi Steven,
No personal criticism meant. I guess this is an inevitable consequence
of the current kernel development process and tooling. Reports and
patches get lots on a regular basis. In some subsystems we don't hear
from maintainers at all. That's one of the things we wanted to solve
with the syzbot dashboard: no thing get lost ever:
https://syzkaller.appspot.com/#upstream
But the other side of the medal is that bug report statues need to be
maintained.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2018-08-24 17:46 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-11 12:02 KASAN: slab-out-of-bounds Write in process_preds syzbot
2018-05-10 5:14 ` Dmitry Vyukov
2018-05-10 14:23 ` Steven Rostedt
2018-05-11 13:52 ` Dmitry Vyukov
2018-08-23 14:13 ` Dmitry Vyukov
2018-08-24 1:03 ` Steven Rostedt
2018-08-24 17:46 ` Dmitry Vyukov
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