* kernel BUG at include/linux/mm.h:LINE! (3)
@ 2019-02-27 6:02 syzbot
2019-02-27 6:11 ` Eric Biggers
0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2019-02-27 6:02 UTC (permalink / raw)
To: linux-fsdevel, linux-kernel, syzkaller-bugs, viro
Hello,
syzbot found the following crash on:
HEAD commit: 8e7f81e2ebc4 Add linux-next specific files for 20190226
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10381714c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2fa10211b8a4a56e
dashboard link: https://syzkaller.appspot.com/bug?extid=a5b71df98b247d973f8c
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eda192c00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164831e0c00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+a5b71df98b247d973f8c@syzkaller.appspotmail.com
page:ffffea00025c3ac0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x1fffc0000000000()
raw: 01fffc0000000000 ffffea00024bf988 ffffea00021dd448 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:579!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7779 Comm: syz-executor379 Not tainted 5.0.0-rc8-next-20190226
#43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
RIP: 0010:put_page include/linux/mm.h:1025 [inline]
RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29
bd ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f50f90 CR3: 0000000097b89000 CR4: 00000000001406f0
Call Trace:
pipe_buf_release include/linux/pipe_fs_i.h:129 [inline]
iter_file_splice_write+0x7d1/0xbe0 fs/splice.c:759
do_splice_from fs/splice.c:847 [inline]
direct_splice_actor+0x126/0x1a0 fs/splice.c:1019
splice_direct_to_actor+0x369/0x970 fs/splice.c:974
do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
do_sendfile+0x597/0xd00 fs/read_write.c:1442
__do_sys_sendfile64 fs/read_write.c:1503 [inline]
__se_sys_sendfile64 fs/read_write.c:1489 [inline]
__x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1489
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443d29
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fffc1e47c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d29
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0
R10: 0000000102000300 R11: 0000000000000246 R12: 0000000000401a30
R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 9daff95e0e1a45ff ]---
RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
RIP: 0010:put_page include/linux/mm.h:1025 [inline]
RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29
bd ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f50f90 CR3: 0000000097b89000 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] 5+ messages in thread
* Re: kernel BUG at include/linux/mm.h:LINE! (3)
2019-02-27 6:02 kernel BUG at include/linux/mm.h:LINE! (3) syzbot
@ 2019-02-27 6:11 ` Eric Biggers
2019-02-27 6:30 ` Dmitry Vyukov
2019-02-27 13:13 ` Jens Axboe
0 siblings, 2 replies; 5+ messages in thread
From: Eric Biggers @ 2019-02-27 6:11 UTC (permalink / raw)
To: syzbot; +Cc: linux-fsdevel, linux-kernel, syzkaller-bugs, viro, Jens Axboe
On Tue, Feb 26, 2019 at 10:02:04PM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 8e7f81e2ebc4 Add linux-next specific files for 20190226
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=10381714c00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=2fa10211b8a4a56e
> dashboard link: https://syzkaller.appspot.com/bug?extid=a5b71df98b247d973f8c
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eda192c00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164831e0c00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+a5b71df98b247d973f8c@syzkaller.appspotmail.com
>
> page:ffffea00025c3ac0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
> flags: 0x1fffc0000000000()
> raw: 01fffc0000000000 ffffea00024bf988 ffffea00021dd448 0000000000000000
> raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
> page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
> ------------[ cut here ]------------
> kernel BUG at include/linux/mm.h:579!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> CPU: 0 PID: 7779 Comm: syz-executor379 Not tainted 5.0.0-rc8-next-20190226
> #43
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020f50f90 CR3: 0000000097b89000 CR4: 00000000001406f0
> Call Trace:
> pipe_buf_release include/linux/pipe_fs_i.h:129 [inline]
> iter_file_splice_write+0x7d1/0xbe0 fs/splice.c:759
> do_splice_from fs/splice.c:847 [inline]
> direct_splice_actor+0x126/0x1a0 fs/splice.c:1019
> splice_direct_to_actor+0x369/0x970 fs/splice.c:974
> do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
> do_sendfile+0x597/0xd00 fs/read_write.c:1442
> __do_sys_sendfile64 fs/read_write.c:1503 [inline]
> __se_sys_sendfile64 fs/read_write.c:1489 [inline]
> __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1489
> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x443d29
> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007fffc1e47c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
> RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d29
> RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
> RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0
> R10: 0000000102000300 R11: 0000000000000246 R12: 0000000000401a30
> R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
> Modules linked in:
> ---[ end trace 9daff95e0e1a45ff ]---
> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020f50f90 CR3: 0000000097b89000 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
>
This is the same bug I already reported here and Jens is working on:
https://marc.info/?l=linux-api&m=155115288114046&w=2
I'll mark this fixed once the fix is folded in and in linux-next.
- Eric
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kernel BUG at include/linux/mm.h:LINE! (3)
2019-02-27 6:11 ` Eric Biggers
@ 2019-02-27 6:30 ` Dmitry Vyukov
2019-02-27 13:13 ` Jens Axboe
1 sibling, 0 replies; 5+ messages in thread
From: Dmitry Vyukov @ 2019-02-27 6:30 UTC (permalink / raw)
To: Eric Biggers
Cc: syzbot, linux-fsdevel, LKML, syzkaller-bugs, Al Viro, Jens Axboe
On Wed, Feb 27, 2019 at 7:11 AM Eric Biggers <ebiggers@kernel.org> wrote:
>
> On Tue, Feb 26, 2019 at 10:02:04PM -0800, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: 8e7f81e2ebc4 Add linux-next specific files for 20190226
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=10381714c00000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=2fa10211b8a4a56e
> > dashboard link: https://syzkaller.appspot.com/bug?extid=a5b71df98b247d973f8c
> > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eda192c00000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164831e0c00000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+a5b71df98b247d973f8c@syzkaller.appspotmail.com
> >
> > page:ffffea00025c3ac0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
> > flags: 0x1fffc0000000000()
> > raw: 01fffc0000000000 ffffea00024bf988 ffffea00021dd448 0000000000000000
> > raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
> > page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
> > ------------[ cut here ]------------
> > kernel BUG at include/linux/mm.h:579!
> > invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> > CPU: 0 PID: 7779 Comm: syz-executor379 Not tainted 5.0.0-rc8-next-20190226
> > #43
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> > RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> > RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> > Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> > af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> > ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> > RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> > RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> > RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> > R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> > R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> > FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 0000000020f50f90 CR3: 0000000097b89000 CR4: 00000000001406f0
> > Call Trace:
> > pipe_buf_release include/linux/pipe_fs_i.h:129 [inline]
> > iter_file_splice_write+0x7d1/0xbe0 fs/splice.c:759
> > do_splice_from fs/splice.c:847 [inline]
> > direct_splice_actor+0x126/0x1a0 fs/splice.c:1019
> > splice_direct_to_actor+0x369/0x970 fs/splice.c:974
> > do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
> > do_sendfile+0x597/0xd00 fs/read_write.c:1442
> > __do_sys_sendfile64 fs/read_write.c:1503 [inline]
> > __se_sys_sendfile64 fs/read_write.c:1489 [inline]
> > __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1489
> > do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
> > entry_SYSCALL_64_after_hwframe+0x49/0xbe
> > RIP: 0033:0x443d29
> > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
> > RSP: 002b:00007fffc1e47c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
> > RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d29
> > RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
> > RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0
> > R10: 0000000102000300 R11: 0000000000000246 R12: 0000000000401a30
> > R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
> > Modules linked in:
> > ---[ end trace 9daff95e0e1a45ff ]---
> > RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> > RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> > RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> > Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> > af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> > ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> > RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> > RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> > RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> > RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> > R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> > R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> > FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 0000000020f50f90 CR3: 0000000097b89000 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
> >
>
> This is the same bug I already reported here and Jens is working on:
> https://marc.info/?l=linux-api&m=155115288114046&w=2
> I'll mark this fixed once the fix is folded in and in linux-next.
Does this io_uring thing has some user API? If so it would benefit
from syzkaller descriptions.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kernel BUG at include/linux/mm.h:LINE! (3)
2019-02-27 6:11 ` Eric Biggers
2019-02-27 6:30 ` Dmitry Vyukov
@ 2019-02-27 13:13 ` Jens Axboe
2019-02-27 20:54 ` Eric Biggers
1 sibling, 1 reply; 5+ messages in thread
From: Jens Axboe @ 2019-02-27 13:13 UTC (permalink / raw)
To: Eric Biggers, syzbot; +Cc: linux-fsdevel, linux-kernel, syzkaller-bugs, viro
On 2/26/19 11:11 PM, Eric Biggers wrote:
> On Tue, Feb 26, 2019 at 10:02:04PM -0800, syzbot wrote:
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit: 8e7f81e2ebc4 Add linux-next specific files for 20190226
>> git tree: linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=10381714c00000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=2fa10211b8a4a56e
>> dashboard link: https://syzkaller.appspot.com/bug?extid=a5b71df98b247d973f8c
>> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eda192c00000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164831e0c00000
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+a5b71df98b247d973f8c@syzkaller.appspotmail.com
>>
>> page:ffffea00025c3ac0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
>> flags: 0x1fffc0000000000()
>> raw: 01fffc0000000000 ffffea00024bf988 ffffea00021dd448 0000000000000000
>> raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
>> page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
>> ------------[ cut here ]------------
>> kernel BUG at include/linux/mm.h:579!
>> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
>> CPU: 0 PID: 7779 Comm: syz-executor379 Not tainted 5.0.0-rc8-next-20190226
>> #43
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> Google 01/01/2011
>> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
>> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
>> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
>> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
>> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
>> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
>> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
>> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
>> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
>> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
>> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
>> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
>> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 0000000020f50f90 CR3: 0000000097b89000 CR4: 00000000001406f0
>> Call Trace:
>> pipe_buf_release include/linux/pipe_fs_i.h:129 [inline]
>> iter_file_splice_write+0x7d1/0xbe0 fs/splice.c:759
>> do_splice_from fs/splice.c:847 [inline]
>> direct_splice_actor+0x126/0x1a0 fs/splice.c:1019
>> splice_direct_to_actor+0x369/0x970 fs/splice.c:974
>> do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
>> do_sendfile+0x597/0xd00 fs/read_write.c:1442
>> __do_sys_sendfile64 fs/read_write.c:1503 [inline]
>> __se_sys_sendfile64 fs/read_write.c:1489 [inline]
>> __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1489
>> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
>> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>> RIP: 0033:0x443d29
>> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
>> RSP: 002b:00007fffc1e47c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
>> RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d29
>> RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
>> RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0
>> R10: 0000000102000300 R11: 0000000000000246 R12: 0000000000401a30
>> R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
>> Modules linked in:
>> ---[ end trace 9daff95e0e1a45ff ]---
>> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
>> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
>> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
>> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
>> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
>> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
>> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
>> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
>> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
>> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
>> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
>> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
>> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 0000000020f50f90 CR3: 0000000097b89000 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
>>
>
> This is the same bug I already reported here and Jens is working on:
> https://marc.info/?l=linux-api&m=155115288114046&w=2
> I'll mark this fixed once the fix is folded in and in linux-next.
It should already be, I folded in the fix about 24h ago.
--
Jens Axboe
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: kernel BUG at include/linux/mm.h:LINE! (3)
2019-02-27 13:13 ` Jens Axboe
@ 2019-02-27 20:54 ` Eric Biggers
0 siblings, 0 replies; 5+ messages in thread
From: Eric Biggers @ 2019-02-27 20:54 UTC (permalink / raw)
To: Jens Axboe; +Cc: syzbot, linux-fsdevel, linux-kernel, syzkaller-bugs, viro
On Wed, Feb 27, 2019 at 06:13:19AM -0700, Jens Axboe wrote:
> On 2/26/19 11:11 PM, Eric Biggers wrote:
> > On Tue, Feb 26, 2019 at 10:02:04PM -0800, syzbot wrote:
> >> Hello,
> >>
> >> syzbot found the following crash on:
> >>
> >> HEAD commit: 8e7f81e2ebc4 Add linux-next specific files for 20190226
> >> git tree: linux-next
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=10381714c00000
> >> kernel config: https://syzkaller.appspot.com/x/.config?x=2fa10211b8a4a56e
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=a5b71df98b247d973f8c
> >> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eda192c00000
> >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164831e0c00000
> >>
> >> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> >> Reported-by: syzbot+a5b71df98b247d973f8c@syzkaller.appspotmail.com
> >>
> >> page:ffffea00025c3ac0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
> >> flags: 0x1fffc0000000000()
> >> raw: 01fffc0000000000 ffffea00024bf988 ffffea00021dd448 0000000000000000
> >> raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
> >> page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
> >> ------------[ cut here ]------------
> >> kernel BUG at include/linux/mm.h:579!
> >> invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> >> CPU: 0 PID: 7779 Comm: syz-executor379 Not tainted 5.0.0-rc8-next-20190226
> >> #43
> >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> >> Google 01/01/2011
> >> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> >> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> >> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> >> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> >> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> >> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> >> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> >> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> >> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> >> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> >> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> >> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> >> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >> CR2: 0000000020f50f90 CR3: 0000000097b89000 CR4: 00000000001406f0
> >> Call Trace:
> >> pipe_buf_release include/linux/pipe_fs_i.h:129 [inline]
> >> iter_file_splice_write+0x7d1/0xbe0 fs/splice.c:759
> >> do_splice_from fs/splice.c:847 [inline]
> >> direct_splice_actor+0x126/0x1a0 fs/splice.c:1019
> >> splice_direct_to_actor+0x369/0x970 fs/splice.c:974
> >> do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
> >> do_sendfile+0x597/0xd00 fs/read_write.c:1442
> >> __do_sys_sendfile64 fs/read_write.c:1503 [inline]
> >> __se_sys_sendfile64 fs/read_write.c:1489 [inline]
> >> __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1489
> >> do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
> >> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> >> RIP: 0033:0x443d29
> >> Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
> >> RSP: 002b:00007fffc1e47c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
> >> RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443d29
> >> RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
> >> RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0
> >> R10: 0000000102000300 R11: 0000000000000246 R12: 0000000000401a30
> >> R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
> >> Modules linked in:
> >> ---[ end trace 9daff95e0e1a45ff ]---
> >> RIP: 0010:put_page_testzero include/linux/mm.h:579 [inline]
> >> RIP: 0010:put_page include/linux/mm.h:1025 [inline]
> >> RIP: 0010:generic_pipe_buf_release+0x120/0x160 fs/pipe.c:224
> >> Code: bd ff 4c 89 e7 e8 90 43 db ff e8 bb 29 bd ff 5b 41 5c 41 5d 5d c3 e8
> >> af 29 bd ff 48 c7 c6 20 98 75 87 4c 89 e7 e8 c0 db e4 ff <0f> 0b e8 99 29 bd
> >> ff 4d 8d 65 ff e9 3d ff ff ff 48 89 df e8 e8 f8
> >> RSP: 0018:ffff8880a503f920 EFLAGS: 00010293
> >> RAX: ffff88808d2ec6c0 RBX: ffffea00025c3af4 RCX: 0000000000000000
> >> RDX: 0000000000000000 RSI: ffffffff81982852 RDI: ffffea00025c3af8
> >> RBP: ffff8880a503f938 R08: 000000000000003e R09: ffffed1015d05011
> >> R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00025c3ac0
> >> R13: 0000000000000000 R14: ffff88809b6e8a40 R15: ffff8880952c4000
> >> FS: 00000000016a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
> >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >> CR2: 0000000020f50f90 CR3: 0000000097b89000 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
> >>
> >
> > This is the same bug I already reported here and Jens is working on:
> > https://marc.info/?l=linux-api&m=155115288114046&w=2
> > I'll mark this fixed once the fix is folded in and in linux-next.
>
> It should already be, I folded in the fix about 24h ago.
>
Yep, it's fixed in next-20190227. The fix was folded into
"block: implement bio helper to add iter bvec pages to bio".
Telling syzbot to invalidate this bug report:
#syz invalid
- Eric
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-02-27 20:54 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-27 6:02 kernel BUG at include/linux/mm.h:LINE! (3) syzbot
2019-02-27 6:11 ` Eric Biggers
2019-02-27 6:30 ` Dmitry Vyukov
2019-02-27 13:13 ` Jens Axboe
2019-02-27 20:54 ` Eric Biggers
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