* [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf
@ 2022-08-24 16:35 syzbot
2022-08-29 8:40 ` Jiri Slaby
2022-08-30 6:41 ` Jiri Slaby
0 siblings, 2 replies; 5+ messages in thread
From: syzbot @ 2022-08-24 16:35 UTC (permalink / raw)
To: gregkh, jirislaby, linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 1c23f9e627a7 Linux 6.0-rc2
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000
kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7
dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
ESR = 0x0000000086000006
EC = 0x21: IABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000
[0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000
Internal error: Oops: 86000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022
Workqueue: events_unbound flush_to_ldisc
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861
sp : ffff80000f603c30
x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9
x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000
x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000
x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40
x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78
x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04
x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800
Call trace:
0x0
tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461
tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39
receive_buf drivers/tty/tty_buffer.c:511 [inline]
flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
Code: bad PC value
---[ end trace 0000000000000000 ]---
---
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.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf
2022-08-24 16:35 [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf syzbot
@ 2022-08-29 8:40 ` Jiri Slaby
2022-08-29 8:40 ` syzbot
2022-08-29 8:40 ` syzbot
2022-08-30 6:41 ` Jiri Slaby
1 sibling, 2 replies; 5+ messages in thread
From: Jiri Slaby @ 2022-08-29 8:40 UTC (permalink / raw)
To: syzbot, gregkh, linux-kernel, syzkaller-bugs
#syz dup: BUG: unable to handle kernel NULL pointer dereference in
gsmld_receive_buf
On 24. 08. 22, 18:35, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 1c23f9e627a7 Linux 6.0-rc2
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000
> kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7
> dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88
> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com
>
> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
> Mem abort info:
> ESR = 0x0000000086000006
> EC = 0x21: IABT (current EL), IL = 32 bits
> SET = 0, FnV = 0
> EA = 0, S1PTW = 0
> FSC = 0x06: level 2 translation fault
> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000
> [0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000
> Internal error: Oops: 86000006 [#1] PREEMPT SMP
> Modules linked in:
> CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022
> Workqueue: events_unbound flush_to_ldisc
> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> pc : 0x0
> lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861
> sp : ffff80000f603c30
> x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9
> x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000
> x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000
> x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40
> x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000
> x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78
> x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04
> x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000
> x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da
> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800
> Call trace:
> 0x0
> tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461
> tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39
> receive_buf drivers/tty/tty_buffer.c:511 [inline]
> flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561
> process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
> worker_thread+0x340/0x610 kernel/workqueue.c:2436
> kthread+0x12c/0x158 kernel/kthread.c:376
> ret_from_fork+0x10/0x20
> Code: bad PC value
> ---[ end trace 0000000000000000 ]---
>
>
> ---
> 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.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
--
js
suse labs
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf
2022-08-29 8:40 ` Jiri Slaby
@ 2022-08-29 8:40 ` syzbot
2022-08-29 8:40 ` syzbot
1 sibling, 0 replies; 5+ messages in thread
From: syzbot @ 2022-08-29 8:40 UTC (permalink / raw)
To: Jiri Slaby; +Cc: gregkh, jirislaby, linux-kernel, syzkaller-bugs
> #syz dup: BUG: unable to handle kernel NULL pointer dereference in
can't find the dup bug
> gsmld_receive_buf
>
> On 24. 08. 22, 18:35, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit: 1c23f9e627a7 Linux 6.0-rc2
>> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
>> console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7
>> dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88
>> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
>> userspace arch: arm64
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com
>>
>> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
>> Mem abort info:
>> ESR = 0x0000000086000006
>> EC = 0x21: IABT (current EL), IL = 32 bits
>> SET = 0, FnV = 0
>> EA = 0, S1PTW = 0
>> FSC = 0x06: level 2 translation fault
>> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000
>> [0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000
>> Internal error: Oops: 86000006 [#1] PREEMPT SMP
>> Modules linked in:
>> CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022
>> Workqueue: events_unbound flush_to_ldisc
>> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
>> pc : 0x0
>> lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861
>> sp : ffff80000f603c30
>> x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9
>> x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000
>> x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000
>> x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40
>> x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000
>> x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78
>> x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04
>> x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000
>> x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da
>> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800
>> Call trace:
>> 0x0
>> tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461
>> tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39
>> receive_buf drivers/tty/tty_buffer.c:511 [inline]
>> flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561
>> process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
>> worker_thread+0x340/0x610 kernel/workqueue.c:2436
>> kthread+0x12c/0x158 kernel/kthread.c:376
>> ret_from_fork+0x10/0x20
>> Code: bad PC value
>> ---[ end trace 0000000000000000 ]---
>>
>>
>> ---
>> 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.
>> syzbot can test patches for this issue, for details see:
>> https://goo.gl/tpsmEJ#testing-patches
>
> --
> js
> suse labs
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf
2022-08-29 8:40 ` Jiri Slaby
2022-08-29 8:40 ` syzbot
@ 2022-08-29 8:40 ` syzbot
1 sibling, 0 replies; 5+ messages in thread
From: syzbot @ 2022-08-29 8:40 UTC (permalink / raw)
To: Jiri Slaby; +Cc: gregkh, jirislaby, linux-kernel, syzkaller-bugs
> #syz dup: BUG: unable to handle kernel NULL pointer dereference in
can't find the dup bug
> gsmld_receive_buf
>
> On 24. 08. 22, 18:35, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit: 1c23f9e627a7 Linux 6.0-rc2
>> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
>> console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7
>> dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88
>> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
>> userspace arch: arm64
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com
>>
>> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
>> Mem abort info:
>> ESR = 0x0000000086000006
>> EC = 0x21: IABT (current EL), IL = 32 bits
>> SET = 0, FnV = 0
>> EA = 0, S1PTW = 0
>> FSC = 0x06: level 2 translation fault
>> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000
>> [0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000
>> Internal error: Oops: 86000006 [#1] PREEMPT SMP
>> Modules linked in:
>> CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022
>> Workqueue: events_unbound flush_to_ldisc
>> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
>> pc : 0x0
>> lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861
>> sp : ffff80000f603c30
>> x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9
>> x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000
>> x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000
>> x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40
>> x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000
>> x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78
>> x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04
>> x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000
>> x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da
>> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800
>> Call trace:
>> 0x0
>> tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461
>> tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39
>> receive_buf drivers/tty/tty_buffer.c:511 [inline]
>> flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561
>> process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
>> worker_thread+0x340/0x610 kernel/workqueue.c:2436
>> kthread+0x12c/0x158 kernel/kthread.c:376
>> ret_from_fork+0x10/0x20
>> Code: bad PC value
>> ---[ end trace 0000000000000000 ]---
>>
>>
>> ---
>> 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.
>> syzbot can test patches for this issue, for details see:
>> https://goo.gl/tpsmEJ#testing-patches
>
> --
> js
> suse labs
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/d0188e1d-374d-5256-7c15-f91989195ce2%40kernel.org.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf
2022-08-24 16:35 [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf syzbot
2022-08-29 8:40 ` Jiri Slaby
@ 2022-08-30 6:41 ` Jiri Slaby
1 sibling, 0 replies; 5+ messages in thread
From: Jiri Slaby @ 2022-08-30 6:41 UTC (permalink / raw)
To: syzbot, gregkh, linux-kernel, syzkaller-bugs
One more try w/o wrapping:
#syz dup: BUG: unable to handle kernel NULL pointer dereference in gsmld_receive_buf
On 24. 08. 22, 18:35, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 1c23f9e627a7 Linux 6.0-rc2
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000
> kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7
> dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88
> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com
>
> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
> Mem abort info:
> ESR = 0x0000000086000006
> EC = 0x21: IABT (current EL), IL = 32 bits
> SET = 0, FnV = 0
> EA = 0, S1PTW = 0
> FSC = 0x06: level 2 translation fault
> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000
> [0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000
> Internal error: Oops: 86000006 [#1] PREEMPT SMP
> Modules linked in:
> CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022
> Workqueue: events_unbound flush_to_ldisc
> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> pc : 0x0
> lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861
> sp : ffff80000f603c30
> x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9
> x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000
> x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000
> x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40
> x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000
> x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78
> x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04
> x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000
> x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da
> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800
> Call trace:
> 0x0
> tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461
> tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39
> receive_buf drivers/tty/tty_buffer.c:511 [inline]
> flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561
> process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
> worker_thread+0x340/0x610 kernel/workqueue.c:2436
> kthread+0x12c/0x158 kernel/kthread.c:376
> ret_from_fork+0x10/0x20
> Code: bad PC value
> ---[ end trace 0000000000000000 ]---
>
>
> ---
> 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.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
--
js
suse labs
--
js
suse labs
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2022-08-24 16:35 [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf syzbot
2022-08-29 8:40 ` Jiri Slaby
2022-08-29 8:40 ` syzbot
2022-08-29 8:40 ` syzbot
2022-08-30 6:41 ` Jiri Slaby
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