BUG: unable to handle kernel paging request in insert_char
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syzbot
Dec 7, 2019, 3:10:10 PM12/7/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: fb683b5e Linux 4.19.88
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12fc41dae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa0c39a6a0078b1c
dashboard link: https://syzkaller.appspot.com/bug?extid=cc08863f947091905ff4
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+cc0886...@syzkaller.appspotmail.com
BUG: unable to handle kernel paging request at 000000010000000e
PGD 55548067 P4D 55548067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14777 Comm: syz-executor.4 Not tainted 4.19.88-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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809606f728 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1100c01ff09 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff88809606f770 R08: ffff8880916220c0 R09: 0000000000000005
R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000
R13: ffff8880600ff480 R14: ffff8880600ff7b4 R15: 000000010000000e
FS: 00007f386600f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000008c7d5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csi_at drivers/tty/vt/vt.c:1965 [inline]
do_con_trol+0x3ca8/0x6070 drivers/tty/vt/vt.c:2412
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+0x3f9/0x10f0 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: 0033:0x45a6f9
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:00007f386600ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000000000078 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f386600f6d4
R13: 00000000004cbbaf R14: 00000000004e5858 R15: 00000000ffffffff
Modules linked in:
CR2: 000000010000000e
---[ end trace 5dbf413cc5cf058e ]---
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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809606f728 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1100c01ff09 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff88809606f770 R08: ffff8880916220c0 R09: 0000000000000005
R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000
R13: ffff8880600ff480 R14: ffff8880600ff7b4 R15: 000000010000000e
FS: 00007f386600f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a0b7e8 CR3: 000000008c7d5000 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 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: fb683b5e Linux 4.19.88
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12fc41dae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa0c39a6a0078b1c
dashboard link: https://syzkaller.appspot.com/bug?extid=cc08863f947091905ff4
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+cc0886...@syzkaller.appspotmail.com
BUG: unable to handle kernel paging request at 000000010000000e
PGD 55548067 P4D 55548067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14777 Comm: syz-executor.4 Not tainted 4.19.88-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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809606f728 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1100c01ff09 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff88809606f770 R08: ffff8880916220c0 R09: 0000000000000005
R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000
R13: ffff8880600ff480 R14: ffff8880600ff7b4 R15: 000000010000000e
FS: 00007f386600f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000008c7d5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csi_at drivers/tty/vt/vt.c:1965 [inline]
do_con_trol+0x3ca8/0x6070 drivers/tty/vt/vt.c:2412
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+0x3f9/0x10f0 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: 0033:0x45a6f9
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:00007f386600ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000000000078 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f386600f6d4
R13: 00000000004cbbaf R14: 00000000004e5858 R15: 00000000ffffffff
Modules linked in:
CR2: 000000010000000e
---[ end trace 5dbf413cc5cf058e ]---
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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff88809606f728 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1100c01ff09 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff88809606f770 R08: ffff8880916220c0 R09: 0000000000000005
R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000
R13: ffff8880600ff480 R14: ffff8880600ff7b4 R15: 000000010000000e
FS: 00007f386600f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a0b7e8 CR3: 000000008c7d5000 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 syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 13, 2019, 1:49:07 PM12/13/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: a844dc4c Linux 4.14.158
syzbot found the following crash on:
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15704fdae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=c02bef505ffc02ff
dashboard link: https://syzkaller.appspot.com/bug?extid=5c72dffac655d688ba3f
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+5c72df...@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
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
PGD 82ed9067 P4D 82ed9067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 5861 Comm: syz-executor.1 Not tainted 4.14.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff888080ed4080 task.stack: ffff8880244c8000
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:insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
RSP: 0018:ffff8880244cf838 EFLAGS: 00010202
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1101511a0b1 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff8880244cf868 R08: ffff8880a88d058c R09: 0000000000000002
R10: 0000000000000000 R11: ffff888080ed4080 R12: ffff8880a88d01c0
R13: ffff8880a88d054c R14: ffff8880a88d04f4 R15: 000000010000000e
FS: 00007f9a4c2ba700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000097ee6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
csi_at drivers/tty/vt/vt.c:1627 [inline]
do_con_trol+0x35bd/0x5b40 drivers/tty/vt/vt.c:2074
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/0xee0 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: 0033:0x45a909
RSP: 002b:00007f9a4c2b9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a909
RDX: 0000000000000078 RSI: 00000000200001c0 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a4c2ba6d4
R13: 00000000004cbdc5 R14: 00000000004e5a58 R15: 00000000ffffffff
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
3b 01 00 00 41 0f b7 84 24 c8 03 00 00 d1 eb 4c 89 ff 89 d9 <f3> 66 ab 49
8d bc 24 78 04 00 00 48 b8 00 00 00 00 00 fc ff df
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
ffff8880244cf838
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff8880244cf838
RIP: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535 RSP: ffff8880244cf838
CR2: 000000010000000e
---[ end trace 7efdc2b261f96c9f ]---
syzbot
Dec 16, 2019, 4:59:08 PM12/16/19
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: 312017a4 Linux 4.19.89
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10d9a471e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=67c148d572dbab48
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e86346e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cc0886...@syzkaller.appspotmail.com
audit: type=1400 audit(1576533356.474:36): avc: denied { map } for
pid=7714 comm="syz-executor137" path="/root/syz-executor137679926"
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
RBP: ffff888092647770 R08: ffff88807fda4700 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000
R13: ffff8880903c28c0 R14: ffff8880903c2bf4 R15: 000000010000000e
FS: 0000000002652880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
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:00007fff20248c18 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
RBP: ffff888092647770 R08: ffff88807fda4700 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000
R13: ffff8880903c28c0 R14: ffff8880903c2bf4 R15: 000000010000000e
FS: 0000000002652880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
HEAD commit: 312017a4 Linux 4.19.89
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10d9a471e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=67c148d572dbab48
dashboard link: https://syzkaller.appspot.com/bug?extid=cc08863f947091905ff4
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=179d0471e00000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e86346e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cc0886...@syzkaller.appspotmail.com
pid=7714 comm="syz-executor137" path="/root/syz-executor137679926"
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
PGD 93db6067 P4D 93db6067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7714 Comm: syz-executor137 Not tainted 4.19.89-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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff888092647728 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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff11012078591 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff888092647770 R08: ffff88807fda4700 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000
R13: ffff8880903c28c0 R14: ffff8880903c2bf4 R15: 000000010000000e
FS: 0000000002652880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 000000009177e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csi_at drivers/tty/vt/vt.c:1965 [inline]
do_con_trol+0x3ca8/0x6070 drivers/tty/vt/vt.c:2412
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
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csi_at drivers/tty/vt/vt.c:1965 [inline]
do_con_trol+0x3ca8/0x6070 drivers/tty/vt/vt.c:2412
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]
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
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:00007fff20248c18 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 83b6ec87c4d77f4a ]---
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:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffff888092647728 EFLAGS: 00010202
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:insert_char+0x23d/0x450 drivers/tty/vt/vt.c:840
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
32 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d
bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff11012078591 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff888092647770 R08: ffff88807fda4700 R09: 0000000000000005
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000
R13: ffff8880903c28c0 R14: ffff8880903c2bf4 R15: 000000010000000e
FS: 0000000002652880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002118000 CR3: 000000009177e000 CR4: 00000000001406f0
syzbot
Dec 16, 2019, 6:55:10 PM12/16/19
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: a844dc4c Linux 4.14.158
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16e1772ee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12bf5bdee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+5c72df...@syzkaller.appspotmail.com
audit: type=1400 audit(1576540318.353:36): avc: denied { map } for
pid=7169 comm="syz-executor319" path="/root/syz-executor319615387"
RBP: ffff8880a13bf868 R08: ffff8880a4c6550c R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808e7fa640 R12: ffff8880a4c65140
R13: ffff8880a4c654cc R14: ffff8880a4c65474 R15: 000000010000000e
FS: 0000000000975880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
RSP: 002b:00007ffd19b72328 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff8880a13bf838
RIP: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535 RSP: ffff8880a13bf838
CR2: 000000010000000e
---[ end trace 7d3d4e07c436daba ]---
HEAD commit: a844dc4c Linux 4.14.158
git tree: linux-4.14.y
kernel config: https://syzkaller.appspot.com/x/.config?x=c02bef505ffc02ff
dashboard link: https://syzkaller.appspot.com/bug?extid=5c72dffac655d688ba3f
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d94b61e00000
dashboard link: https://syzkaller.appspot.com/bug?extid=5c72dffac655d688ba3f
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12bf5bdee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+5c72df...@syzkaller.appspotmail.com
pid=7169 comm="syz-executor319" path="/root/syz-executor319615387"
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
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: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
PGD 9be5a067 P4D 9be5a067 PUD 0
IP: memset16 arch/x86/include/asm/string_64.h:58 [inline]
IP: scr_memsetw include/linux/vt_buffer.h:36 [inline]
IP: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7169 Comm: syz-executor319 Not tainted 4.14.158-syzkaller #0
Modules linked in:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff88808e7fa640 task.stack: ffff8880a13b8000
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:insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
RSP: 0018:ffff8880a13bf838 EFLAGS: 00010202
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:insert_char+0x107/0x290 drivers/tty/vt/vt.c:535
RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 1ffff1101498caa1 RSI: 000000010000000e RDI: 000000010000000e
RBP: ffff8880a13bf868 R08: ffff8880a4c6550c R09: 0000000000000002
R10: 0000000000000000 R11: ffff88808e7fa640 R12: ffff8880a4c65140
R13: ffff8880a4c654cc R14: ffff8880a4c65474 R15: 000000010000000e
FS: 0000000000975880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000090914000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
csi_at drivers/tty/vt/vt.c:1627 [inline]
do_con_trol+0x35bd/0x5b40 drivers/tty/vt/vt.c:2074
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/0xee0 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
csi_at drivers/tty/vt/vt.c:1627 [inline]
do_con_trol+0x35bd/0x5b40 drivers/tty/vt/vt.c:2074
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/0xee0 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:00007ffd19b72328 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: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e
3b 01 00 00 41 0f b7 84 24 c8 03 00 00 d1 eb 4c 89 ff 89 d9 <f3> 66 ab 49
8d bc 24 78 04 00 00 48 b8 00 00 00 00 00 fc ff df
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
ffff8880a13bf838
3b 01 00 00 41 0f b7 84 24 c8 03 00 00 d1 eb 4c 89 ff 89 d9 <f3> 66 ab 49
8d bc 24 78 04 00 00 48 b8 00 00 00 00 00 fc ff df
RIP: memset16 arch/x86/include/asm/string_64.h:58 [inline] RSP:
RIP: scr_memsetw include/linux/vt_buffer.h:36 [inline] RSP: ffff8880a13bf838
RIP: insert_char+0x107/0x290 drivers/tty/vt/vt.c:535 RSP: ffff8880a13bf838
CR2: 000000010000000e
---[ end trace 7d3d4e07c436daba ]---
syzbot
Aug 14, 2020, 4:11:06 AM8/14/20
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=14379be2900000
start commit: 312017a4 Linux 4.19.89
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=14379be2900000
start commit: 312017a4 Linux 4.19.89
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=67c148d572dbab48
dashboard link: https://syzkaller.appspot.com/bug?extid=cc08863f947091905ff4
dashboard link: https://syzkaller.appspot.com/bug?extid=cc08863f947091905ff4
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=179d0471e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e86346e00000
If the result looks correct, please mark the issue as fixed by replying with:
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e86346e00000
#syz fix: vt: Reject zero-sized screen buffer size.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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