* BUG: corrupted list in locks_delete_block
@ 2018-11-11 18:18 syzbot
2018-11-16 20:40 ` Dmitry Vyukov
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2018-11-11 18:18 UTC (permalink / raw)
To: bfields, jlayton, linux-fsdevel, linux-kernel, syzkaller-bugs, viro
Hello,
syzbot found the following crash on:
HEAD commit: 442b8cea2477 Add linux-next specific files for 20181109
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12b1262b400000
kernel config: https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8
dashboard link: https://syzkaller.appspot.com/bug?extid=13eb7470890c56ce3f37
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107566a3400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b5fa2b400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+13eb7470890c56ce3f37@syzkaller.appspotmail.com
list_del corruption. prev->next should be ffff8801c135f960, but was
0000000000000007
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5972 Comm: syz-executor001 Not tainted
4.20.0-rc1-next-20181109+ #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9
48 c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000046aa40 CR3: 00000001b39ab000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__list_del_entry include/linux/list.h:117 [inline]
list_del_init include/linux/list.h:159 [inline]
__locks_delete_block fs/locks.c:683 [inline]
locks_delete_block+0xce/0x3d0 fs/locks.c:716
locks_mandatory_area+0x48b/0x6a0 fs/locks.c:1398
rw_verify_area+0x2f2/0x360 fs/read_write.c:386
do_iter_write+0x101/0x5f0 fs/read_write.c:954
vfs_writev+0x1f1/0x360 fs/read_write.c:1004
do_writev+0x11a/0x310 fs/read_write.c:1039
__do_sys_writev fs/read_write.c:1112 [inline]
__se_sys_writev fs/read_write.c:1109 [inline]
__x64_sys_writev+0x75/0xb0 fs/read_write.c:1109
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446619
Code: e8 6c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f96b449bda8 EFLAGS: 00000297 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446619
RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003
RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dbc3c
R13: 2f30656c69662f2e R14: 64663d736e617274 R15: 00000000006dbd2c
Modules linked in:
---[ end trace efdc3057b60b19f3 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9
48 c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000046aa40 CR3: 00000001b39ab000 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] 3+ messages in thread
* Re: BUG: corrupted list in locks_delete_block
2018-11-11 18:18 BUG: corrupted list in locks_delete_block syzbot
@ 2018-11-16 20:40 ` Dmitry Vyukov
2018-11-17 13:35 ` Jeff Layton
0 siblings, 1 reply; 3+ messages in thread
From: Dmitry Vyukov @ 2018-11-16 20:40 UTC (permalink / raw)
To: syzbot
Cc: Bruce Fields, Jeff Layton, linux-fsdevel, LKML, syzkaller-bugs,
Al Viro, NeilBrown
On Sun, Nov 11, 2018 at 10:18 AM, syzbot
<syzbot+13eb7470890c56ce3f37@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 442b8cea2477 Add linux-next specific files for 20181109
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=12b1262b400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8
> dashboard link: https://syzkaller.appspot.com/bug?extid=13eb7470890c56ce3f37
> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107566a3400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b5fa2b400000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+13eb7470890c56ce3f37@syzkaller.appspotmail.com
This is another manifestation of the following report, right?
#syz dup: KASAN: use-after-free Read in locks_delete_block
> list_del corruption. prev->next should be ffff8801c135f960, but was
> 0000000000000007
> ------------[ cut here ]------------
> kernel BUG at lib/list_debug.c:53!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> CPU: 1 PID: 5972 Comm: syz-executor001 Not tainted 4.20.0-rc1-next-20181109+
> #110
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
> Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
> d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48
> c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
> RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
> RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
> RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
> R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
> R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
> FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000046aa40 CR3: 00000001b39ab000 CR4: 00000000001406e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> __list_del_entry include/linux/list.h:117 [inline]
> list_del_init include/linux/list.h:159 [inline]
> __locks_delete_block fs/locks.c:683 [inline]
> locks_delete_block+0xce/0x3d0 fs/locks.c:716
> locks_mandatory_area+0x48b/0x6a0 fs/locks.c:1398
> rw_verify_area+0x2f2/0x360 fs/read_write.c:386
> do_iter_write+0x101/0x5f0 fs/read_write.c:954
> vfs_writev+0x1f1/0x360 fs/read_write.c:1004
> do_writev+0x11a/0x310 fs/read_write.c:1039
> __do_sys_writev fs/read_write.c:1112 [inline]
> __se_sys_writev fs/read_write.c:1109 [inline]
> __x64_sys_writev+0x75/0xb0 fs/read_write.c:1109
> do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x446619
> Code: e8 6c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007f96b449bda8 EFLAGS: 00000297 ORIG_RAX: 0000000000000014
> RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446619
> RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003
> RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dbc3c
> R13: 2f30656c69662f2e R14: 64663d736e617274 R15: 00000000006dbd2c
> Modules linked in:
> ---[ end trace efdc3057b60b19f3 ]---
> RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
> Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
> d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48
> c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
> RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
> RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
> RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
> R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
> R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
> FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000046aa40 CR3: 00000001b39ab000 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
>
> --
> You received this message because you are subscribed to the Google Groups
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> For more options, visit https://groups.google.com/d/optout.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: corrupted list in locks_delete_block
2018-11-16 20:40 ` Dmitry Vyukov
@ 2018-11-17 13:35 ` Jeff Layton
0 siblings, 0 replies; 3+ messages in thread
From: Jeff Layton @ 2018-11-17 13:35 UTC (permalink / raw)
To: Dmitry Vyukov, syzbot
Cc: Bruce Fields, linux-fsdevel, LKML, syzkaller-bugs, Al Viro, NeilBrown
On Fri, 2018-11-16 at 12:40 -0800, Dmitry Vyukov wrote:
> On Sun, Nov 11, 2018 at 10:18 AM, syzbot
> <syzbot+13eb7470890c56ce3f37@syzkaller.appspotmail.com> wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: 442b8cea2477 Add linux-next specific files for 20181109
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=12b1262b400000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8
> > dashboard link: https://syzkaller.appspot.com/bug?extid=13eb7470890c56ce3f37
> > compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107566a3400000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b5fa2b400000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+13eb7470890c56ce3f37@syzkaller.appspotmail.com
>
> This is another manifestation of the following report, right?
>
> #syz dup: KASAN: use-after-free Read in locks_delete_block
>
Yes, I think so.
> > list_del corruption. prev->next should be ffff8801c135f960, but was
> > 0000000000000007
> > ------------[ cut here ]------------
> > kernel BUG at lib/list_debug.c:53!
> > invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> > CPU: 1 PID: 5972 Comm: syz-executor001 Not tainted 4.20.0-rc1-next-20181109+
> > #110
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
> > Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
> > d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48
> > c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
> > RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
> > RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
> > RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
> > R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
> > R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
> > FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 000000000046aa40 CR3: 00000001b39ab000 CR4: 00000000001406e0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > Call Trace:
> > __list_del_entry include/linux/list.h:117 [inline]
> > list_del_init include/linux/list.h:159 [inline]
> > __locks_delete_block fs/locks.c:683 [inline]
> > locks_delete_block+0xce/0x3d0 fs/locks.c:716
> > locks_mandatory_area+0x48b/0x6a0 fs/locks.c:1398
> > rw_verify_area+0x2f2/0x360 fs/read_write.c:386
> > do_iter_write+0x101/0x5f0 fs/read_write.c:954
> > vfs_writev+0x1f1/0x360 fs/read_write.c:1004
> > do_writev+0x11a/0x310 fs/read_write.c:1039
> > __do_sys_writev fs/read_write.c:1112 [inline]
> > __se_sys_writev fs/read_write.c:1109 [inline]
> > __x64_sys_writev+0x75/0xb0 fs/read_write.c:1109
> > do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> > entry_SYSCALL_64_after_hwframe+0x49/0xbe
> > RIP: 0033:0x446619
> > Code: e8 6c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
> > RSP: 002b:00007f96b449bda8 EFLAGS: 00000297 ORIG_RAX: 0000000000000014
> > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446619
> > RDX: 0000000000000001 RSI: 0000000020000440 RDI: 0000000000000003
> > RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000
> > R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dbc3c
> > R13: 2f30656c69662f2e R14: 64663d736e617274 R15: 00000000006dbd2c
> > Modules linked in:
> > ---[ end trace efdc3057b60b19f3 ]---
> > RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x4a lib/list_debug.c:51
> > Code: fe 60 88 e8 72 9b d3 fd 0f 0b 48 89 de 48 c7 c7 40 00 61 88 e8 61 9b
> > d3 fd 0f 0b 48 89 de 48 c7 c7 e0 ff 60 88 e8 50 9b d3 fd <0f> 0b 48 89 d9 48
> > c7 c7 a0 00 61 88 e8 3f 9b d3 fd 0f 0b 48 89 f1
> > RSP: 0018:ffff8801c135f750 EFLAGS: 00010286
> > RAX: 0000000000000054 RBX: ffff8801c135f960 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005
> > RBP: ffff8801c135f768 R08: ffff8801c11ce080 R09: ffffed003b5e5020
> > R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d945f3a0
> > R13: ffff8801d945f3a0 R14: 0000000000000000 R15: ffff8801c135f838
> > FS: 00007f96b449c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 000000000046aa40 CR3: 00000001b39ab000 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
> >
> > --
> > 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-bugs+unsubscribe@googlegroups.com.
> > To view this discussion on the web visit
> > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000fa9fb7057a679a42%40google.com.
> > For more options, visit https://groups.google.com/d/optout.
--
Jeff Layton <jlayton@kernel.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-11-11 18:18 BUG: corrupted list in locks_delete_block syzbot
2018-11-16 20:40 ` Dmitry Vyukov
2018-11-17 13:35 ` Jeff Layton
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