* WARNING: bad usercopy in corrupted (2)
@ 2018-11-25 15:30 syzbot
2018-11-25 21:27 ` Matthew Wilcox
2019-03-20 0:49 ` syzbot
0 siblings, 2 replies; 6+ messages in thread
From: syzbot @ 2018-11-25 15:30 UTC (permalink / raw)
To: crecklin, keescook, linux-kernel, linux-mm, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: aea0a897af9e ptp: Fix pass zero to ERR_PTR() in ptp_clock_..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=101b91d5400000
kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)
------------[ cut here ]------------
Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected
to SLAB object 'task_struct' (offset 1432, size 2)!
WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110
mm/usercopy.c:78
Kernel panic - not syncing: panic_on_warn set ...
list_add corruption. next->prev should be prev (ffff8881daf2d798), but was
0b7e0c8e49cc0400. (next=ffff8881d9b4a4f0).
CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
------------[ cut here ]------------
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
kernel BUG at lib/list_debug.c:25!
------------[ cut here ]------------
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kernel BUG at mm/slab.c:4425!
CPU: 0 PID: 8652 Comm: syz-executor607 Not tainted 4.20.0-rc3+ #312
WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438
__rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Modules linked in:
RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1
48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
usercopy: Kernel memory overwrite attempt detected to SLAB
object 'signal_cache' (offset 1328, size 23)!
RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
------------[ cut here ]------------
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
kernel BUG at mm/usercopy.c:102!
RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__list_add include/linux/list.h:60 [inline]
list_add include/linux/list.h:79 [inline]
list_move include/linux/list.h:171 [inline]
detach_tasks kernel/sched/fair.c:7298 [inline]
load_balance+0x1b8d/0x39a0 kernel/sched/fair.c:8731
rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109
run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731
__do_softirq+0x308/0xb7e kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x17f/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
</IRQ>
RIP: 0033:0x4005dd
Code: c9 00 04 00 66 0f 1f 84 00 00 00 00 00 48 8b 05 f1 2e 2d 00 48 85 c0
74 11 bf 3c e8 4b 00 b9 0e 00 00 00 48 89 c6 f3 a6 75 01 <c3> 48 89 c7 e9
9a ec 01 00 66 2e 0f 1f 84 00 00 00 00 00 8b 05 4a
RSP: 002b:00007fff144765a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000006d2190
RDX: 0000000000402410 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000006cc0a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace eeb5734c13709e17 ]---
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
CPU: 1 PID: 38 Comm: ���ف���d\v������ Tainted: G D
4.20.0-rc3+ #312
RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1
48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90
RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
Code: c0 e8 f7 dc b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c
89 ee 48 c7 c7 80 d5 34 88 ff 75 d0 41 57 e8 e7 28 98 ff <0f> 0b e8 cc dc
b1 ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31
RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000
RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8
R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914da1d
FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
R13: ffffffff8834d3e0 R14: ffffffff8834d320 R15: ffffffff8834d2e0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace eeb5734c13709e18 ]---
RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1
48 c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
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 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] 6+ messages in thread
* Re: WARNING: bad usercopy in corrupted (2)
2018-11-25 15:30 WARNING: bad usercopy in corrupted (2) syzbot
@ 2018-11-25 21:27 ` Matthew Wilcox
2018-11-25 23:07 ` Matthew Wilcox
2019-03-20 0:49 ` syzbot
1 sibling, 1 reply; 6+ messages in thread
From: Matthew Wilcox @ 2018-11-25 21:27 UTC (permalink / raw)
To: syzbot
Cc: crecklin, keescook, linux-kernel, linux-mm, syzkaller-bugs, linux-net
On Sun, Nov 25, 2018 at 07:30:04AM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: aea0a897af9e ptp: Fix pass zero to ERR_PTR() in ptp_clock_..
> git tree: net-next
If you found it on net-next, I'd suggets cc'ing linux-net ...
> console output: https://syzkaller.appspot.com/x/log.txt?x=101b91d5400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
> dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)
> ------------[ cut here ]------------
> Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected
> to SLAB object 'task_struct' (offset 1432, size 2)!
> WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110
> mm/usercopy.c:78
> Kernel panic - not syncing: panic_on_warn set ...
> list_add corruption. next->prev should be prev (ffff8881daf2d798), but was
> 0b7e0c8e49cc0400. (next=ffff8881d9b4a4f0).
> CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
> ------------[ cut here ]------------
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> kernel BUG at lib/list_debug.c:25!
> ------------[ cut here ]------------
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> kernel BUG at mm/slab.c:4425!
> CPU: 0 PID: 8652 Comm: syz-executor607 Not tainted 4.20.0-rc3+ #312
> WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438
> __rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Modules linked in:
> RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
> Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> usercopy: Kernel memory overwrite attempt detected to SLAB object
> 'signal_cache' (offset 1328, size 23)!
> RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> ------------[ cut here ]------------
> RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> kernel BUG at mm/usercopy.c:102!
> RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <IRQ>
> __list_add include/linux/list.h:60 [inline]
> list_add include/linux/list.h:79 [inline]
> list_move include/linux/list.h:171 [inline]
> detach_tasks kernel/sched/fair.c:7298 [inline]
> load_balance+0x1b8d/0x39a0 kernel/sched/fair.c:8731
> rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109
> run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731
> __do_softirq+0x308/0xb7e kernel/softirq.c:292
> invoke_softirq kernel/softirq.c:373 [inline]
> irq_exit+0x17f/0x1c0 kernel/softirq.c:413
> exiting_irq arch/x86/include/asm/apic.h:536 [inline]
> smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
> apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
> </IRQ>
> RIP: 0033:0x4005dd
> Code: c9 00 04 00 66 0f 1f 84 00 00 00 00 00 48 8b 05 f1 2e 2d 00 48 85 c0
> 74 11 bf 3c e8 4b 00 b9 0e 00 00 00 48 89 c6 f3 a6 75 01 <c3> 48 89 c7 e9 9a
> ec 01 00 66 2e 0f 1f 84 00 00 00 00 00 8b 05 4a
> RSP: 002b:00007fff144765a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
> RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000006d2190
> RDX: 0000000000402410 RSI: 0000000000000000 RDI: 0000000000000000
> RBP: 00000000006cc0a8 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
> R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
> Modules linked in:
> ---[ end trace eeb5734c13709e17 ]---
> invalid opcode: 0000 [#2] PREEMPT SMP KASAN
> CPU: 1 PID: 38 Comm: ���ف���d\v������ Tainted: G D 4.20.0-rc3+
> #312
> RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90
> RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> Code: c0 e8 f7 dc b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c
> 89 ee 48 c7 c7 80 d5 34 88 ff 75 d0 41 57 e8 e7 28 98 ff <0f> 0b e8 cc dc b1
> ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31
> RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086
> RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000
> RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8
> R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914da1d
> FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> R13: ffffffff8834d3e0 R14: ffffffff8834d320 R15: ffffffff8834d2e0
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
> CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> Modules linked in:
> ---[ end trace eeb5734c13709e18 ]---
> RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> 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 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] 6+ messages in thread
* Re: WARNING: bad usercopy in corrupted (2)
2018-11-25 21:27 ` Matthew Wilcox
@ 2018-11-25 23:07 ` Matthew Wilcox
2018-11-26 9:01 ` Dmitry Vyukov
0 siblings, 1 reply; 6+ messages in thread
From: Matthew Wilcox @ 2018-11-25 23:07 UTC (permalink / raw)
To: syzbot; +Cc: crecklin, keescook, linux-kernel, linux-mm, syzkaller-bugs, netdev
On Sun, Nov 25, 2018 at 01:27:09PM -0800, Matthew Wilcox wrote:
> On Sun, Nov 25, 2018 at 07:30:04AM -0800, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: aea0a897af9e ptp: Fix pass zero to ERR_PTR() in ptp_clock_..
> > git tree: net-next
>
> If you found it on net-next, I'd suggets cc'ing linux-net ...
Uh. I meant netdev. Oops.
> > console output: https://syzkaller.appspot.com/x/log.txt?x=101b91d5400000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
> > dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
> > compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
> >
> > ------------[ cut here ]------------
> > DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)
> > ------------[ cut here ]------------
> > Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected
> > to SLAB object 'task_struct' (offset 1432, size 2)!
> > WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110
> > mm/usercopy.c:78
> > Kernel panic - not syncing: panic_on_warn set ...
> > list_add corruption. next->prev should be prev (ffff8881daf2d798), but was
> > 0b7e0c8e49cc0400. (next=ffff8881d9b4a4f0).
> > CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
> > ------------[ cut here ]------------
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > kernel BUG at lib/list_debug.c:25!
> > ------------[ cut here ]------------
> > invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> > kernel BUG at mm/slab.c:4425!
> > CPU: 0 PID: 8652 Comm: syz-executor607 Not tainted 4.20.0-rc3+ #312
> > WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438
> > __rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > Modules linked in:
> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> > CPU: 1 PID: 38 Comm: ���ف���d\v������ Not tainted 4.20.0-rc3+ #312
> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> > usercopy: Kernel memory overwrite attempt detected to SLAB object
> > 'signal_cache' (offset 1328, size 23)!
> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> > ------------[ cut here ]------------
> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> > kernel BUG at mm/usercopy.c:102!
> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> > FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > Call Trace:
> > <IRQ>
> > __list_add include/linux/list.h:60 [inline]
> > list_add include/linux/list.h:79 [inline]
> > list_move include/linux/list.h:171 [inline]
> > detach_tasks kernel/sched/fair.c:7298 [inline]
> > load_balance+0x1b8d/0x39a0 kernel/sched/fair.c:8731
> > rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109
> > run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731
> > __do_softirq+0x308/0xb7e kernel/softirq.c:292
> > invoke_softirq kernel/softirq.c:373 [inline]
> > irq_exit+0x17f/0x1c0 kernel/softirq.c:413
> > exiting_irq arch/x86/include/asm/apic.h:536 [inline]
> > smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
> > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
> > </IRQ>
> > RIP: 0033:0x4005dd
> > Code: c9 00 04 00 66 0f 1f 84 00 00 00 00 00 48 8b 05 f1 2e 2d 00 48 85 c0
> > 74 11 bf 3c e8 4b 00 b9 0e 00 00 00 48 89 c6 f3 a6 75 01 <c3> 48 89 c7 e9 9a
> > ec 01 00 66 2e 0f 1f 84 00 00 00 00 00 8b 05 4a
> > RSP: 002b:00007fff144765a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
> > RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000006d2190
> > RDX: 0000000000402410 RSI: 0000000000000000 RDI: 0000000000000000
> > RBP: 00000000006cc0a8 R08: 0000000000000000 R09: 0000000000000000
> > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
> > R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
> > Modules linked in:
> > ---[ end trace eeb5734c13709e17 ]---
> > invalid opcode: 0000 [#2] PREEMPT SMP KASAN
> > CPU: 1 PID: 38 Comm: ���ف���d\v������ Tainted: G D 4.20.0-rc3+
> > #312
> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> > RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90
> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> > Code: c0 e8 f7 dc b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c
> > 89 ee 48 c7 c7 80 d5 34 88 ff 75 d0 41 57 e8 e7 28 98 ff <0f> 0b e8 cc dc b1
> > ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31
> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> > RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086
> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> > RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000
> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> > RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8
> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> > R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914da1d
> > FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> > R13: ffffffff8834d3e0 R14: ffffffff8834d320 R15: ffffffff8834d2e0
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
> > CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > Call Trace:
> > Modules linked in:
> > ---[ end trace eeb5734c13709e18 ]---
> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
> > FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > 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 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] 6+ messages in thread
* Re: WARNING: bad usercopy in corrupted (2)
2018-11-25 23:07 ` Matthew Wilcox
@ 2018-11-26 9:01 ` Dmitry Vyukov
0 siblings, 0 replies; 6+ messages in thread
From: Dmitry Vyukov @ 2018-11-26 9:01 UTC (permalink / raw)
To: Matthew Wilcox
Cc: syzbot, Chris von Recklinghausen, Kees Cook, LKML, Linux-MM,
syzkaller-bugs, netdev
On Mon, Nov 26, 2018 at 12:07 AM, Matthew Wilcox <willy@infradead.org> wrote:
>> > Hello,
>> >
>> > syzbot found the following crash on:
>> >
>> > HEAD commit: aea0a897af9e ptp: Fix pass zero to ERR_PTR() in ptp_clock_..
>> > git tree: net-next
>>
>> If you found it on net-next, I'd suggets cc'ing linux-net ...
>
> Uh. I meant netdev. Oops.
I've filed https://github.com/google/syzkaller/issues/828 for this. Thanks.
>> > console output: https://syzkaller.appspot.com/x/log.txt?x=101b91d5400000
>> > kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
>> > dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
>> > compiler: gcc (GCC) 8.0.1 20180413 (experimental)
>> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
>> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
>> >
>> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> > Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
>> >
>> > ------------[ cut here ]------------
>> > DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)
>> > ------------[ cut here ]------------
>> > Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected
>> > to SLAB object 'task_struct' (offset 1432, size 2)!
>> > WARNING: CPU: 1 PID: 38 at mm/usercopy.c:83 usercopy_warn+0xee/0x110
>> > mm/usercopy.c:78
>> > Kernel panic - not syncing: panic_on_warn set ...
>> > list_add corruption. next->prev should be prev (ffff8881daf2d798), but was
>> > 0b7e0c8e49cc0400. (next=ffff8881d9b4a4f0).
>> > CPU: 1 PID: 38 Comm: ���ف���d ������ Not tainted 4.20.0-rc3+ #312
>> > ------------[ cut here ]------------
>> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> > Google 01/01/2011
>> > kernel BUG at lib/list_debug.c:25!
>> > ------------[ cut here ]------------
>> > invalid opcode: 0000 [#1] PREEMPT SMP KASAN
>> > kernel BUG at mm/slab.c:4425!
>> > CPU: 0 PID: 8652 Comm: syz-executor607 Not tainted 4.20.0-rc3+ #312
>> > WARNING: CPU: 1 PID: 38 at kernel/rcu/tree_plugin.h:438
>> > __rcu_read_unlock+0x266/0x2e0 kernel/rcu/tree_plugin.h:432
>> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> > Google 01/01/2011
>> > Modules linked in:
>> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
>> > CPU: 1 PID: 38 Comm: ���ف���d ������ Not tainted 4.20.0-rc3+ #312
>> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
>> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
>> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
>> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> > Google 01/01/2011
>> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
>> > usercopy: Kernel memory overwrite attempt detected to SLAB object
>> > 'signal_cache' (offset 1328, size 23)!
>> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
>> > ------------[ cut here ]------------
>> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
>> > kernel BUG at mm/usercopy.c:102!
>> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
>> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
>> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
>> > FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> > Call Trace:
>> > <IRQ>
>> > __list_add include/linux/list.h:60 [inline]
>> > list_add include/linux/list.h:79 [inline]
>> > list_move include/linux/list.h:171 [inline]
>> > detach_tasks kernel/sched/fair.c:7298 [inline]
>> > load_balance+0x1b8d/0x39a0 kernel/sched/fair.c:8731
>> > rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:9109
>> > run_rebalance_domains+0x38d/0x500 kernel/sched/fair.c:9731
>> > __do_softirq+0x308/0xb7e kernel/softirq.c:292
>> > invoke_softirq kernel/softirq.c:373 [inline]
>> > irq_exit+0x17f/0x1c0 kernel/softirq.c:413
>> > exiting_irq arch/x86/include/asm/apic.h:536 [inline]
>> > smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
>> > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
>> > </IRQ>
>> > RIP: 0033:0x4005dd
>> > Code: c9 00 04 00 66 0f 1f 84 00 00 00 00 00 48 8b 05 f1 2e 2d 00 48 85 c0
>> > 74 11 bf 3c e8 4b 00 b9 0e 00 00 00 48 89 c6 f3 a6 75 01 <c3> 48 89 c7 e9 9a
>> > ec 01 00 66 2e 0f 1f 84 00 00 00 00 00 8b 05 4a
>> > RSP: 002b:00007fff144765a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
>> > RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000006d2190
>> > RDX: 0000000000402410 RSI: 0000000000000000 RDI: 0000000000000000
>> > RBP: 00000000006cc0a8 R08: 0000000000000000 R09: 0000000000000000
>> > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
>> > R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
>> > Modules linked in:
>> > ---[ end trace eeb5734c13709e17 ]---
>> > invalid opcode: 0000 [#2] PREEMPT SMP KASAN
>> > CPU: 1 PID: 38 Comm: ���ف���d ������ Tainted: G D 4.20.0-rc3+
>> > #312
>> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
>> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> > Google 01/01/2011
>> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
>> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
>> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
>> > RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90
>> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
>> > Code: c0 e8 f7 dc b1 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c
>> > 89 ee 48 c7 c7 80 d5 34 88 ff 75 d0 41 57 e8 e7 28 98 ff <0f> 0b e8 cc dc b1
>> > ff e8 97 13 f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31
>> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
>> > RSP: 0018:ffff8881d9b49438 EFLAGS: 00010086
>> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
>> > RAX: 0000000000000068 RBX: ffffffff88291020 RCX: 0000000000000000
>> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
>> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
>> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
>> > RBP: ffff8881d9b49490 R08: ffff8881d9b4a440 R09: ffffed103b5e3ef8
>> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
>> > R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: ffffffff8914da1d
>> > FS: 000000000083c880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
>> > R13: ffffffff8834d3e0 R14: ffffffff8834d320 R15: ffffffff8834d2e0
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
>> > CR2: 00007fff14476600 CR3: 00000001d2a59000 CR4: 00000000001406f0
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
>> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> > Call Trace:
>> > Modules linked in:
>> > ---[ end trace eeb5734c13709e18 ]---
>> > RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23
>> > Code: d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de 48 c7 c7 60 d1 60 88 e8 90 37
>> > d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 7f 37 d2 fd <0f> 0b 48 89 f1 48
>> > c7 c7 a0 d2 60 88 48 89 de e8 6b 37 d2 fd 0f 0b
>> > RSP: 0000:ffff8881dae07588 EFLAGS: 00010082
>> > RAX: 0000000000000075 RBX: ffff8881d9b4a4f0 RCX: 0000000000000000
>> > RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
>> > RBP: ffff8881dae075a0 R08: ffff8881d25ce100 R09: ffffed103b5c5020
>> > R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: ffff8881bd890230
>> > R13: dffffc0000000000 R14: ffff8881dae07980 R15: ffff8881daf2d798
>> > FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
>> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > CR2: 0000000000000130 CR3: 00000001d7880000 CR4: 00000000001406e0
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > 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 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
>>
>
> --
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> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING: bad usercopy in corrupted (2)
2018-11-25 15:30 WARNING: bad usercopy in corrupted (2) syzbot
2018-11-25 21:27 ` Matthew Wilcox
@ 2019-03-20 0:49 ` syzbot
2019-03-20 9:39 ` Dmitry Vyukov
1 sibling, 1 reply; 6+ messages in thread
From: syzbot @ 2019-03-20 0:49 UTC (permalink / raw)
To: crecklin, davem, dvyukov, keescook, kuznet, linux-kernel,
linux-mm, linux-net, netdev, sbrivio, sd, syzkaller-bugs, willy,
yoshfuji
syzbot has bisected this bug to:
commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
Author: Stefano Brivio <sbrivio@redhat.com>
Date: Thu Nov 8 11:19:23 2018 +0000
fou, fou6: ICMP error handlers for FoU and GUE
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14a57f83200000
start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12a57f83200000
kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING: bad usercopy in corrupted (2)
2019-03-20 0:49 ` syzbot
@ 2019-03-20 9:39 ` Dmitry Vyukov
0 siblings, 0 replies; 6+ messages in thread
From: Dmitry Vyukov @ 2019-03-20 9:39 UTC (permalink / raw)
To: syzbot
Cc: Chris von Recklinghausen, David Miller, Kees Cook,
Alexey Kuznetsov, LKML, Linux-MM, linux-net, netdev,
Stefano Brivio, Sabrina Dubroca, syzkaller-bugs, Matthew Wilcox,
Hideaki YOSHIFUJI
On Wed, Mar 20, 2019 at 1:49 AM syzbot
<syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
>
> commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
> Author: Stefano Brivio <sbrivio@redhat.com>
> Date: Thu Nov 8 11:19:23 2018 +0000
>
> fou, fou6: ICMP error handlers for FoU and GUE
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14a57f83200000
> start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=12a57f83200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=c36a72af2123e78a
> dashboard link: https://syzkaller.appspot.com/bug?extid=d89b30c46434c433dbf8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f6a47400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e1df7b400000
>
> Reported-by: syzbot+d89b30c46434c433dbf8@syzkaller.appspotmail.com
> Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
That commit caused lots of crashes that look completely differently.
Now all that is fixed. The last crash for this bugs happened 2+ months
ago. So let's just do:
#syz fix: fou: Prevent unbounded recursion in GUE error handler also
with UDP-Lite
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-03-20 9:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2018-11-25 15:30 WARNING: bad usercopy in corrupted (2) syzbot
2018-11-25 21:27 ` Matthew Wilcox
2018-11-25 23:07 ` Matthew Wilcox
2018-11-26 9:01 ` Dmitry Vyukov
2019-03-20 0:49 ` syzbot
2019-03-20 9:39 ` Dmitry Vyukov
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