* kernel BUG at mm/slab.c:LINE! (3)
@ 2018-11-14 7:18 syzbot
2018-11-16 21:56 ` Dmitry Vyukov
2019-03-20 20:55 ` syzbot
0 siblings, 2 replies; 4+ messages in thread
From: syzbot @ 2018-11-14 7:18 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: 3e536cff3424 net: phy: check if advertising is zero using ..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16f95b83400000
kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5
dashboard link: https://syzkaller.appspot.com/bug?extid=2182db487a523d86bf34
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148d46d5400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c6a225400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+2182db487a523d86bf34@syzkaller.appspotmail.com
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(depth >= MAX_LOCK_DEPTH)
------------[ cut here ]------------
kernel BUG at mm/slab.c:4425!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: -642842048 Comm: ksoftirqd/0 Not tainted 4.20.0-rc2+ #294
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4450
Code: 48 c7 c7 15 73 12 89 e8 97 e3 0a 00 5d c3 41 8b 91 04 01 00 00 48 29
c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7
15 73 12 89 e8 fd eb 0a 00 44 89 e9 48 c7 c7 d0 73
RSP: 0018:ffff8881d9af0030 EFLAGS: 00010093
RAX: 00000000000a57eb RBX: 1ffff1103b35e00d RCX: 000000000000000c
RDX: ffff8881d9af0240 RSI: 0000000000000002 RDI: ffff8881d9af01d8
RBP: ffff8881d9af0030 R08: ffff8881d9af0240 R09: ffff8881da970180
R10: 000000004afd69e7 R11: 0000000000000000 R12: ffff8881d9af01d8
R13: 0000000000000002 R14: ffffea000766bc00 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001bb987000 CR4: 00000000001406f0
Call Trace:
Modules linked in:
---[ end trace 1c9eb38e9e38ee03 ]---
RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4450
Code: 48 c7 c7 15 73 12 89 e8 97 e3 0a 00 5d c3 41 8b 91 04 01 00 00 48 29
c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7
15 73 12 89 e8 fd eb 0a 00 44 89 e9 48 c7 c7 d0 73
RSP: 0018:ffff8881d9af0030 EFLAGS: 00010093
RAX: 00000000000a57eb RBX: 1ffff1103b35e00d RCX: 000000000000000c
RDX: ffff8881d9af0240 RSI: 0000000000000002 RDI: ffff8881d9af01d8
RBP: ffff8881d9af0030 R08: ffff8881d9af0240 R09: ffff8881da970180
R10: 000000004afd69e7 R11: 0000000000000000 R12: ffff8881d9af01d8
R13: 0000000000000002 R14: ffffea000766bc00 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001bb987000 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: kernel BUG at mm/slab.c:LINE! (3)
2018-11-14 7:18 kernel BUG at mm/slab.c:LINE! (3) syzbot
@ 2018-11-16 21:56 ` Dmitry Vyukov
2019-03-20 20:55 ` syzbot
1 sibling, 0 replies; 4+ messages in thread
From: Dmitry Vyukov @ 2018-11-16 21:56 UTC (permalink / raw)
To: syzbot, netdev, David Miller; +Cc: LKML, syzkaller-bugs
On Tue, Nov 13, 2018 at 11:18 PM, syzbot
<syzbot+2182db487a523d86bf34@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 3e536cff3424 net: phy: check if advertising is zero using ..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=16f95b83400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5
> dashboard link: https://syzkaller.appspot.com/bug?extid=2182db487a523d86bf34
> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148d46d5400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c6a225400000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+2182db487a523d86bf34@syzkaller.appspotmail.com
All reproducers just do something simple with inet6 sockets and all
crashes are on net-next, so +netdev
r0 = socket$inet6(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000080)={0xa, 0x4e24, 0x0, @ipv4={[], [],
@loopback}}, 0x1c)
sendmmsg(r0, &(0x7f00000092c0), 0x3ffffffffff0c00, 0x0)
> ------------[ cut here ]------------
> DEBUG_LOCKS_WARN_ON(depth >= MAX_LOCK_DEPTH)
> ------------[ cut here ]------------
> kernel BUG at mm/slab.c:4425!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> CPU: 0 PID: -642842048 Comm: ksoftirqd/0 Not tainted 4.20.0-rc2+ #294
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4450
> Code: 48 c7 c7 15 73 12 89 e8 97 e3 0a 00 5d c3 41 8b 91 04 01 00 00 48 29
> c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7 15
> 73 12 89 e8 fd eb 0a 00 44 89 e9 48 c7 c7 d0 73
> RSP: 0018:ffff8881d9af0030 EFLAGS: 00010093
> RAX: 00000000000a57eb RBX: 1ffff1103b35e00d RCX: 000000000000000c
> RDX: ffff8881d9af0240 RSI: 0000000000000002 RDI: ffff8881d9af01d8
> RBP: ffff8881d9af0030 R08: ffff8881d9af0240 R09: ffff8881da970180
> R10: 000000004afd69e7 R11: 0000000000000000 R12: ffff8881d9af01d8
> R13: 0000000000000002 R14: ffffea000766bc00 R15: 0000000000000001
> FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000068 CR3: 00000001bb987000 CR4: 00000000001406f0
> Call Trace:
> Modules linked in:
> ---[ end trace 1c9eb38e9e38ee03 ]---
> RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4450
> Code: 48 c7 c7 15 73 12 89 e8 97 e3 0a 00 5d c3 41 8b 91 04 01 00 00 48 29
> c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7 15
> 73 12 89 e8 fd eb 0a 00 44 89 e9 48 c7 c7 d0 73
> RSP: 0018:ffff8881d9af0030 EFLAGS: 00010093
> RAX: 00000000000a57eb RBX: 1ffff1103b35e00d RCX: 000000000000000c
> RDX: ffff8881d9af0240 RSI: 0000000000000002 RDI: ffff8881d9af01d8
> RBP: ffff8881d9af0030 R08: ffff8881d9af0240 R09: ffff8881da970180
> R10: 000000004afd69e7 R11: 0000000000000000 R12: ffff8881d9af01d8
> R13: 0000000000000002 R14: ffffea000766bc00 R15: 0000000000000001
> FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000068 CR3: 00000001bb987000 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
>
> --
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: kernel BUG at mm/slab.c:LINE! (3)
2018-11-14 7:18 kernel BUG at mm/slab.c:LINE! (3) syzbot
2018-11-16 21:56 ` Dmitry Vyukov
@ 2019-03-20 20:55 ` syzbot
2019-03-21 6:00 ` Dmitry Vyukov
1 sibling, 1 reply; 4+ messages in thread
From: syzbot @ 2019-03-20 20:55 UTC (permalink / raw)
To: davem, kuznet, linux-kernel, netdev, sbrivio, sd, syzkaller-bugs,
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=161b63cf200000
start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
git tree: net-next
final crash: https://syzkaller.appspot.com/x/report.txt?x=151b63cf200000
console output: https://syzkaller.appspot.com/x/log.txt?x=111b63cf200000
kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5
dashboard link: https://syzkaller.appspot.com/bug?extid=2182db487a523d86bf34
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148d46d5400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c6a225400000
Reported-by: syzbot+2182db487a523d86bf34@syzkaller.appspotmail.com
Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: kernel BUG at mm/slab.c:LINE! (3)
2019-03-20 20:55 ` syzbot
@ 2019-03-21 6:00 ` Dmitry Vyukov
0 siblings, 0 replies; 4+ messages in thread
From: Dmitry Vyukov @ 2019-03-21 6:00 UTC (permalink / raw)
To: syzbot
Cc: David Miller, Alexey Kuznetsov, LKML, netdev, Stefano Brivio,
Sabrina Dubroca, syzkaller-bugs, Hideaki YOSHIFUJI
On Wed, Mar 20, 2019 at 9:55 PM syzbot
<syzbot+2182db487a523d86bf34@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=161b63cf200000
> start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
> git tree: net-next
> final crash: https://syzkaller.appspot.com/x/report.txt?x=151b63cf200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=111b63cf200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=4a0a89f12ca9b0f5
> dashboard link: https://syzkaller.appspot.com/bug?extid=2182db487a523d86bf34
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148d46d5400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c6a225400000
>
> Reported-by: syzbot+2182db487a523d86bf34@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] 4+ messages in thread
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2018-11-14 7:18 kernel BUG at mm/slab.c:LINE! (3) syzbot
2018-11-16 21:56 ` Dmitry Vyukov
2019-03-20 20:55 ` syzbot
2019-03-21 6:00 ` Dmitry Vyukov
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