BUG: unable to handle kernel paging request in csi_J
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syzbot
Jan 9, 2020, 10:19:11 AM1/9/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: b0cdffaa Linux 4.14.163
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1109b6aee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=b207c4ed8f8f80b4
dashboard link: https://syzkaller.appspot.com/bug?extid=29f88f8aeb22d06d0932
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+29f88f...@syzkaller.appspotmail.com
BUG: unable to handle kernel paging request at 000000010000000e
IP: memset16 arch/x86/include/asm/string_64.h:58 [inline]
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
PGD 87140067 P4D 87140067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 9332 Comm: syz-executor.3 Not tainted 4.14.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff88804a4be140 task.stack: ffff88809f780000
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:58 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
RSP: 0018:ffff88809f787838 EFLAGS: 00010202
RAX: 0000000000000e20 RBX: ffff88805d231100 RCX: 0000000000000001
RDX: 1ffff1100ba46299 RSI: ffffffff83511f1c RDI: 000000010000000e
RBP: ffff88809f787868 R08: ffff88805d2314cc R09: 0000000000000002
R10: 0000000000000000 R11: ffff88804a4be140 R12: 7fffffff80000001
R13: 000000010000000e R14: ffff88805d2315f8 R15: ffff88805d2314c8
FS: 00007f4122035700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000008ff52000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3344/0x5b40 drivers/tty/vt/vt.c:2010
do_con_write.part.0+0xcc7/0x1b50 drivers/tty/vt/vt.c:2434
do_con_write drivers/tty/vt/vt.c:2205 [inline]
con_write+0x38/0xc0 drivers/tty/vt/vt.c:2787
process_output_block drivers/tty/n_tty.c:595 [inline]
n_tty_write+0x38b/0xf20 drivers/tty/n_tty.c:2333
do_tty_write drivers/tty/tty_io.c:959 [inline]
tty_write+0x3f6/0x700 drivers/tty/tty_io.c:1043
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007f4122034c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f41220356d4
R13: 00000000004cce66 R14: 00000000004e82a0 R15: 00000000ffffffff
Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08
3c 01 0f 8e 69 01 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 ef <f3> 66 ab 48
b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
ffff88809f787838
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff88809f787838
RIP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195 RSP: ffff88809f787838
CR2: 000000010000000e
kobject: 'loop1' (ffff888057841560): kobject_uevent_env
kobject: 'loop1' (ffff888057841560): fill_kobj_path: path
= '/devices/virtual/block/loop1'
---[ end trace 3764a36483a9eb32 ]---
---
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 syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: b0cdffaa Linux 4.14.163
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1109b6aee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=b207c4ed8f8f80b4
dashboard link: https://syzkaller.appspot.com/bug?extid=29f88f8aeb22d06d0932
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+29f88f...@syzkaller.appspotmail.com
BUG: unable to handle kernel paging request at 000000010000000e
IP: memset16 arch/x86/include/asm/string_64.h:58 [inline]
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
PGD 87140067 P4D 87140067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 9332 Comm: syz-executor.3 Not tainted 4.14.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff88804a4be140 task.stack: ffff88809f780000
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:58 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
RSP: 0018:ffff88809f787838 EFLAGS: 00010202
RAX: 0000000000000e20 RBX: ffff88805d231100 RCX: 0000000000000001
RDX: 1ffff1100ba46299 RSI: ffffffff83511f1c RDI: 000000010000000e
RBP: ffff88809f787868 R08: ffff88805d2314cc R09: 0000000000000002
R10: 0000000000000000 R11: ffff88804a4be140 R12: 7fffffff80000001
R13: 000000010000000e R14: ffff88805d2315f8 R15: ffff88805d2314c8
FS: 00007f4122035700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000008ff52000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3344/0x5b40 drivers/tty/vt/vt.c:2010
do_con_write.part.0+0xcc7/0x1b50 drivers/tty/vt/vt.c:2434
do_con_write drivers/tty/vt/vt.c:2205 [inline]
con_write+0x38/0xc0 drivers/tty/vt/vt.c:2787
process_output_block drivers/tty/n_tty.c:595 [inline]
n_tty_write+0x38b/0xf20 drivers/tty/n_tty.c:2333
do_tty_write drivers/tty/tty_io.c:959 [inline]
tty_write+0x3f6/0x700 drivers/tty/tty_io.c:1043
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45af49
RSP: 002b:00007f4122034c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f41220356d4
R13: 00000000004cce66 R14: 00000000004e82a0 R15: 00000000ffffffff
Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08
3c 01 0f 8e 69 01 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 ef <f3> 66 ab 48
b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
ffff88809f787838
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff88809f787838
RIP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195 RSP: ffff88809f787838
CR2: 000000010000000e
kobject: 'loop1' (ffff888057841560): kobject_uevent_env
kobject: 'loop1' (ffff888057841560): fill_kobj_path: path
= '/devices/virtual/block/loop1'
---[ end trace 3764a36483a9eb32 ]---
---
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 syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Jan 15, 2020, 4:22:12 PM1/15/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: db5b9190 Linux 4.19.96
syzbot found the following crash on:
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14c681aee00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a24894346f71303
dashboard link: https://syzkaller.appspot.com/bug?extid=9a156bceccb9ed2db3d7
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9a156b...@syzkaller.appspotmail.com
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
BUG: unable to handle kernel paging request at 000000010000000e
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 17721 Comm: syz-executor.5 Not tainted 4.19.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
Google 01/01/2011
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88804d957730 EFLAGS: 00010202
RAX: 0000000000000720 RBX: ffff88804ff63140 RCX: 0000000000000001
RDX: 1ffff11009fec6a1 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88804d957770 R08: ffff88807ff04340 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f7d6eb3c700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 00000000a01b7000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3ae1/0x6070 drivers/tty/vt/vt.c:2348
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_write.part.0+0xfd5/0x1eb0 drivers/tty/vt/vt.c:2773
do_con_write drivers/tty/vt/vt.c:2541 [inline]
con_write+0x46/0xd0 drivers/tty/vt/vt.c:3110
process_output_block drivers/tty/n_tty.c:593 [inline]
n_tty_write+0x3f9/0x1140 drivers/tty/n_tty.c:2331
do_tty_write drivers/tty/tty_io.c:960 [inline]
tty_write+0x458/0x7a0 drivers/tty/tty_io.c:1044
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45aff9
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7d6eb3bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7d6eb3c6d4 RCX: 000000000045aff9
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000c60 R14: 00000000004cd0b9 R15: 000000000075bf2c
Modules linked in:
CR2: 000000010000000e
---[ end trace f06adb1e199d1135 ]---
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88804d957730 EFLAGS: 00010202
RAX: 0000000000000720 RBX: ffff88804ff63140 RCX: 0000000000000001
RDX: 1ffff11009fec6a1 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88804d957770 R08: ffff88807ff04340 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f7d6eb3c700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043c7d0 CR3: 00000000a01b7000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
syzbot
Jan 15, 2020, 7:00:11 PM1/15/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: db5b9190 Linux 4.19.96
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1283533ee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116fc235e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9a156b...@syzkaller.appspotmail.com
audit: type=1400 audit(1579132610.070:36): avc: denied { map } for
pid=8136 comm="syz-executor120" path="/root/syz-executor120062350"
dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
RAX: 0000000000000720 RBX: ffff88808c086600 RCX: 0000000000000001
RDX: 1ffff11011810d39 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88809746f770 R08: ffff88808afcc5c0 R09: 0000000000000005
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7
RSP: 002b:00007fffbfe86d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0
R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
RAX: 0000000000000720 RBX: ffff88808c086600 RCX: 0000000000000001
RDX: 1ffff11011810d39 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88809746f770 R08: ffff88808afcc5c0 R09: 0000000000000005
HEAD commit: db5b9190 Linux 4.19.96
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=7a24894346f71303
dashboard link: https://syzkaller.appspot.com/bug?extid=9a156bceccb9ed2db3d7
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17729b3ee00000
dashboard link: https://syzkaller.appspot.com/bug?extid=9a156bceccb9ed2db3d7
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116fc235e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9a156b...@syzkaller.appspotmail.com
pid=8136 comm="syz-executor120" path="/root/syz-executor120062350"
dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
BUG: unable to handle kernel paging request at 000000010000000e
PGD a07f8067 P4D a07f8067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8136 Comm: syz-executor120 Not tainted 4.19.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809746f730 EFLAGS: 00010202
Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RAX: 0000000000000720 RBX: ffff88808c086600 RCX: 0000000000000001
RDX: 1ffff11011810d39 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88809746f770 R08: ffff88808afcc5c0 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
FS: 000000000185e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000091eae000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3ae1/0x6070 drivers/tty/vt/vt.c:2348
do_con_write.part.0+0xfd5/0x1eb0 drivers/tty/vt/vt.c:2773
do_con_write drivers/tty/vt/vt.c:2541 [inline]
con_write+0x46/0xd0 drivers/tty/vt/vt.c:3110
process_output_block drivers/tty/n_tty.c:593 [inline]
n_tty_write+0x3f9/0x1140 drivers/tty/n_tty.c:2331
do_tty_write drivers/tty/tty_io.c:960 [inline]
tty_write+0x458/0x7a0 drivers/tty/tty_io.c:1044
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4404f9
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3ae1/0x6070 drivers/tty/vt/vt.c:2348
do_con_write.part.0+0xfd5/0x1eb0 drivers/tty/vt/vt.c:2773
do_con_write drivers/tty/vt/vt.c:2541 [inline]
con_write+0x46/0xd0 drivers/tty/vt/vt.c:3110
process_output_block drivers/tty/n_tty.c:593 [inline]
n_tty_write+0x3f9/0x1140 drivers/tty/n_tty.c:2331
do_tty_write drivers/tty/tty_io.c:960 [inline]
tty_write+0x458/0x7a0 drivers/tty/tty_io.c:1044
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fffbfe86d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0
R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: 000000010000000e
---[ end trace 39792be6e711734b ]---
CR2: 000000010000000e
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:43 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809746f730 EFLAGS: 00010202
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb40 drivers/tty/vt/vt.c:1530
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c
01 0f 8e 09 07 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 8d
bb f8 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RAX: 0000000000000720 RBX: ffff88808c086600 RCX: 0000000000000001
RDX: 1ffff11011810d39 RSI: ffffffff83b54556 RDI: 000000010000000e
RBP: ffff88809746f770 R08: ffff88808afcc5c0 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
FS: 000000000185e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
R13: 7fffffff80000001 R14: 0000000000000000 R15: 0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000091eae000 CR4: 00000000001406f0
syzbot
Jan 15, 2020, 7:45:12 PM1/15/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: c04fc6fa Linux 4.14.165
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1007c821e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=d36f53294bbc71f0
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1233419ee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+29f88f...@syzkaller.appspotmail.com
audit: type=1400 audit(1579135300.339:36): avc: denied { map } for
pid=7307 comm="syz-executor577" path="/root/syz-executor577666368"
dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
RAX: 0000000000000720 RBX: ffff88809d1fab40 RCX: 0000000000000001
RDX: 1ffff11013a3f5e1 RSI: 0000000000000000 RDI: 000000010000000e
RBP: ffff88809f21f868 R08: ffff88809d1faf0c R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880a4948480 R12: 7fffffff80000001
R13: 000000010000000e R14: ffff88809d1fb038 R15: ffff88809d1faf08
FS: 000000000119a880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
RSP: 002b:00007fff30a87c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff88809f21f838
RIP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195 RSP: ffff88809f21f838
CR2: 000000010000000e
---[ end trace d192bd78c645fedd ]---
HEAD commit: c04fc6fa Linux 4.14.165
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1007c821e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=d36f53294bbc71f0
dashboard link: https://syzkaller.appspot.com/bug?extid=29f88f8aeb22d06d0932
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f9b8d1e00000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1233419ee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+29f88f...@syzkaller.appspotmail.com
pid=7307 comm="syz-executor577" path="/root/syz-executor577666368"
dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
BUG: unable to handle kernel paging request at 000000010000000e
IP: memset16 arch/x86/include/asm/string_64.h:58 [inline]
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
PGD a073a067 P4D a073a067 PUD 0
IP: memset16 arch/x86/include/asm/string_64.h:58 [inline]
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7307 Comm: syz-executor577 Not tainted 4.14.165-syzkaller #0
Modules linked in:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8880a4948480 task.stack: ffff88809f218000
Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:58 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
RSP: 0018:ffff88809f21f838 EFLAGS: 00010202
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195
RAX: 0000000000000720 RBX: ffff88809d1fab40 RCX: 0000000000000001
RDX: 1ffff11013a3f5e1 RSI: 0000000000000000 RDI: 000000010000000e
RBP: ffff88809f21f868 R08: ffff88809d1faf0c R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880a4948480 R12: 7fffffff80000001
R13: 000000010000000e R14: ffff88809d1fb038 R15: ffff88809d1faf08
FS: 000000000119a880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 00000000a840e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3344/0x5b40 drivers/tty/vt/vt.c:2010
do_con_write.part.0+0xcc7/0x1b50 drivers/tty/vt/vt.c:2434
do_con_write drivers/tty/vt/vt.c:2205 [inline]
con_write+0x38/0xc0 drivers/tty/vt/vt.c:2787
process_output_block drivers/tty/n_tty.c:595 [inline]
n_tty_write+0x38b/0xf20 drivers/tty/n_tty.c:2333
do_tty_write drivers/tty/tty_io.c:959 [inline]
tty_write+0x3f6/0x700 drivers/tty/tty_io.c:1043
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4404f9
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_con_trol+0x3344/0x5b40 drivers/tty/vt/vt.c:2010
do_con_write.part.0+0xcc7/0x1b50 drivers/tty/vt/vt.c:2434
do_con_write drivers/tty/vt/vt.c:2205 [inline]
con_write+0x38/0xc0 drivers/tty/vt/vt.c:2787
process_output_block drivers/tty/n_tty.c:595 [inline]
n_tty_write+0x38b/0xf20 drivers/tty/n_tty.c:2333
do_tty_write drivers/tty/tty_io.c:959 [inline]
tty_write+0x3f6/0x700 drivers/tty/tty_io.c:1043
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RSP: 002b:00007fff30a87c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0
R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0
R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08
3c 01 0f 8e 69 01 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 ef <f3> 66 ab 48
b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
ffff88809f21f838
3c 01 0f 8e 69 01 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 ef <f3> 66 ab 48
b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff88809f21f838
RIP: csi_J+0x32d/0x560 drivers/tty/vt/vt.c:1195 RSP: ffff88809f21f838
CR2: 000000010000000e
---[ end trace d192bd78c645fedd ]---
syzbot
Aug 1, 2020, 4:40:08 AM8/1/20
to syzkaller...@googlegroups.com
syzbot suspects this issue was fixed by commit:
commit 74752b81eae8ae64e97de222320026367e92c4b5
Author: Tetsuo Handa <penguin...@I-love.SAKURA.ne.jp>
Date: Sun Jul 12 11:10:12 2020 +0000
vt: Reject zero-sized screen buffer size.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1054b5ca900000
start commit: db5b9190 Linux 4.19.96
git tree: linux-4.19.y
#syz fix: vt: Reject zero-sized screen buffer size.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit 74752b81eae8ae64e97de222320026367e92c4b5
Author: Tetsuo Handa <penguin...@I-love.SAKURA.ne.jp>
Date: Sun Jul 12 11:10:12 2020 +0000
vt: Reject zero-sized screen buffer size.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1054b5ca900000
start commit: db5b9190 Linux 4.19.96
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=7a24894346f71303
dashboard link: https://syzkaller.appspot.com/bug?extid=9a156bceccb9ed2db3d7
dashboard link: https://syzkaller.appspot.com/bug?extid=9a156bceccb9ed2db3d7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17729b3ee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116fc235e00000
If the result looks correct, please mark the issue as fixed by replying with:
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116fc235e00000
#syz fix: vt: Reject zero-sized screen buffer size.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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