* [syzbot] BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf
@ 2022-08-08 7:54 syzbot
2022-08-08 13:05 ` syzbot
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2022-08-08 7:54 UTC (permalink / raw)
To: gregkh, jirislaby, linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: ca688bff68bc Add linux-next specific files for 20220808
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1562df51080000
kernel config: https://syzkaller.appspot.com/x/.config?x=4c20e006003cdecb
dashboard link: https://syzkaller.appspot.com/bug?extid=e3563f0c94e188366dbb
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e3563f0c94e188366dbb@syzkaller.appspotmail.com
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 7b32a067 P4D 7b32a067 PUD 7e135067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4273 Comm: syz-executor.0 Not tainted 5.19.0-next-20220808-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000c3a7cf0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888041a85000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000007d RDI: ffff888041a85000
RBP: ffffc9000c3a7da1 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffc9000c3a7d90 R15: dffffc0000000000
FS: 00007f58156b4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000025ca1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861
tiocsti drivers/tty/tty_io.c:2293 [inline]
tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5814489279
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f58156b4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f581459bf80 RCX: 00007f5814489279
RDX: 0000000020000280 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 00007f58144e3189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1f199d5f R14: 00007f58156b4300 R15: 0000000000022000
</TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000c3a7cf0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888041a85000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000007d RDI: ffff888041a85000
RBP: ffffc9000c3a7da1 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffc9000c3a7d90 R15: dffffc0000000000
FS: 00007f58156b4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000025ca1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf
2022-08-08 7:54 [syzbot] BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf syzbot
@ 2022-08-08 13:05 ` syzbot
2022-08-09 12:47 ` Jiri Slaby
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2022-08-08 13:05 UTC (permalink / raw)
To: gregkh, jirislaby, linux-kernel, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: ca688bff68bc Add linux-next specific files for 20220808
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=14a27066080000
kernel config: https://syzkaller.appspot.com/x/.config?x=4c20e006003cdecb
dashboard link: https://syzkaller.appspot.com/bug?extid=e3563f0c94e188366dbb
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=164eb3ca080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17327ce1080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e3563f0c94e188366dbb@syzkaller.appspotmail.com
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 74c90067 P4D 74c90067 PUD 74c53067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3606 Comm: syz-executor237 Not tainted 5.19.0-next-20220808-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
FS: 0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861
tiocsti drivers/tty/tty_io.c:2293 [inline]
tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f76c0e5eb59
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe9a4f7c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76c0e5eb59
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007f76c0e22d00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76c0e22d90
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
FS: 0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf
2022-08-08 13:05 ` syzbot
@ 2022-08-09 12:47 ` Jiri Slaby
0 siblings, 0 replies; 3+ messages in thread
From: Jiri Slaby @ 2022-08-09 12:47 UTC (permalink / raw)
To: syzbot, gregkh, linux-kernel, syzkaller-bugs; +Cc: D. Starke
CC Daniel again.
On 08. 08. 22, 15:05, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: ca688bff68bc Add linux-next specific files for 20220808
> git tree: linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=14a27066080000
> kernel config: https://syzkaller.appspot.com/x/.config?x=4c20e006003cdecb
> dashboard link: https://syzkaller.appspot.com/bug?extid=e3563f0c94e188366dbb
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=164eb3ca080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17327ce1080000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+e3563f0c94e188366dbb@syzkaller.appspotmail.com
>
> BUG: kernel NULL pointer dereference, address: 0000000000000000
> #PF: supervisor instruction fetch in kernel mode
> #PF: error_code(0x0010) - not-present page
> PGD 74c90067 P4D 74c90067 PUD 74c53067 PMD 0
> Oops: 0010 [#1] PREEMPT SMP KASAN
> CPU: 1 PID: 3606 Comm: syz-executor237 Not tainted 5.19.0-next-20220808-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
> RIP: 0010:0x0
> Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
> RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
> RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
> RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
> R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
> R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
> FS: 0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861
> tiocsti drivers/tty/tty_io.c:2293 [inline]
> tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692
> vfs_ioctl fs/ioctl.c:51 [inline]
> __do_sys_ioctl fs/ioctl.c:870 [inline]
> __se_sys_ioctl fs/ioctl.c:856 [inline]
> __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
> do_syscall_x64 arch/x86/entry/common.c:50 [inline]
> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> entry_SYSCALL_64_after_hwframe+0x63/0xcd
> RIP: 0033:0x7f76c0e5eb59
> Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffe9a4f7c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76c0e5eb59
> RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
> RBP: 00007f76c0e22d00 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76c0e22d90
> R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> </TASK>
> Modules linked in:
> CR2: 0000000000000000
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:0x0
> Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
> RSP: 0018:ffffc9000387fcf0 EFLAGS: 00010202
> RAX: 0000000000000001 RBX: ffff88801bbdf000 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801bbdf000
> RBP: ffffc9000387fda1 R08: 0000000000000001 R09: 0000000000000004
> R10: 0000000000000000 R11: 1ffffffff1ffa9ce R12: 0000000000000001
> R13: 0000000000000000 R14: ffffc9000387fd90 R15: dffffc0000000000
> FS: 0000555556e8d300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffffffffffffd6 CR3: 000000001c7e0000 CR4: 00000000003506e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>
--
js
suse labs
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-08-09 12:47 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-08-08 7:54 [syzbot] BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf syzbot
2022-08-08 13:05 ` syzbot
2022-08-09 12:47 ` Jiri Slaby
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