BUG: unable to handle kernel NULL pointer dereference in event_handler
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syzbot
Oct 3, 2020, 4:25:22 AM10/3/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12337c93900000
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
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+5c11c5...@syzkaller.appspotmail.com
vhci_hcd vhci_hcd.0: pdev(2) rhport(1) sockfd(3)
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
vhci_hcd: connection closed
BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
PGD 9f33b067 P4D 9f33b067 PUD 9f33c067 PMD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8075 Comm: kworker/u4:10 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usbip_event event_handler
task: ffff88805650e080 task.stack: ffff888058c30000
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RSP: 0018:ffff888058c37c68 EFLAGS: 00010297
RAX: ffff88805650e080 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000286
RBP: fffffffffffffffc R08: ffffffff8a096600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809ff4ca98
R13: ffff88809ff4ca88 R14: dead000000000100 R15: ffff88809ff4caa0
FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000001c CR3: 000000009f33a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
event_handler+0x18a/0x420 drivers/usb/usbip/usbip_event.c:92
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89 db 48 0f a3 1d bc 22 56 07 0f 82 a2 03 00 00 e8 e9 be 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff888058c37c68
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff888058c37c68
CR2: 000000000000001c
---[ end trace 8f70c287b570b364 ]---
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12337c93900000
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
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+5c11c5...@syzkaller.appspotmail.com
vhci_hcd vhci_hcd.0: pdev(2) rhport(1) sockfd(3)
vhci_hcd vhci_hcd.0: devid(0) speed(5) speed_str(super-speed)
vhci_hcd: connection closed
BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
PGD 9f33b067 P4D 9f33b067 PUD 9f33c067 PMD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8075 Comm: kworker/u4:10 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usbip_event event_handler
task: ffff88805650e080 task.stack: ffff888058c30000
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RSP: 0018:ffff888058c37c68 EFLAGS: 00010297
RAX: ffff88805650e080 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000286
RBP: fffffffffffffffc R08: ffffffff8a096600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809ff4ca98
R13: ffff88809ff4ca88 R14: dead000000000100 R15: ffff88809ff4caa0
FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000001c CR3: 000000009f33a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
event_handler+0x18a/0x420 drivers/usb/usbip/usbip_event.c:92
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89 db 48 0f a3 1d bc 22 56 07 0f 82 a2 03 00 00 e8 e9 be 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff888058c37c68
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff888058c37c68
CR2: 000000000000001c
---[ end trace 8f70c287b570b364 ]---
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Oct 3, 2020, 5:05:18 AM10/3/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16069eeb900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5c11c5...@syzkaller.appspotmail.com
vhci_hcd: connection closed
vhci_hcd: stop threads
vhci_hcd: release socket
vhci_hcd: connection closed
vhci_hcd: disconnect device
PGD 94f3a067 P4D 94f3a067 PUD 948c6067 PMD 0
RAX: ffff8880a0ea8280 RBX: 0000000000000001 RCX: 0000000000000000
vhci_hcd vhci_hcd.0: pdev(3) rhport(1) sockfd(3)
RBP: fffffffffffffffc R08: ffffffff8a09e9b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fabcb58
vhci_hcd: connection closed
R13: ffff88809fabcb48 R14: dead000000000100 R15: ffff88809fabcb60
Call Trace:
vhci_hcd: connection closed
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
vhci_hcd: connection closed
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff8880a0eb7c68
CR2: 000000000000001c
---[ end trace ee271320ff7f7faa ]---
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fe2eeb900000
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5c11c5...@syzkaller.appspotmail.com
vhci_hcd: stop threads
vhci_hcd: release socket
vhci_hcd: connection closed
vhci_hcd: disconnect device
BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3)
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
PGD 94f3a067 P4D 94f3a067 PUD 948c6067 PMD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 2473 Comm: kworker/u4:4 Not tainted 4.14.198-syzkaller #0
Modules linked in:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usbip_event event_handler
task: ffff8880a0ea8280 task.stack: ffff8880a0eb0000
Workqueue: usbip_event event_handler
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RSP: 0018:ffff8880a0eb7c68 EFLAGS: 00010297
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RAX: ffff8880a0ea8280 RBX: 0000000000000001 RCX: 0000000000000000
vhci_hcd vhci_hcd.0: pdev(3) rhport(1) sockfd(3)
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000286
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
RBP: fffffffffffffffc R08: ffffffff8a09e9b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fabcb58
vhci_hcd: connection closed
R13: ffff88809fabcb48 R14: dead000000000100 R15: ffff88809fabcb60
FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000001c CR3: 0000000091524000 CR4: 00000000001406e0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3)
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
vhci_hcd vhci_hcd.0: devid(0) speed(3) speed_str(high-speed)
Call Trace:
vhci_hcd: connection closed
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
vhci_hcd: connection closed
event_handler+0x18a/0x420 drivers/usb/usbip/usbip_event.c:92
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89 db 48 0f a3 1d bc 22 56 07 0f 82 a2 03 00 00 e8 e9 be 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff8880a0eb7c68
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89 db 48 0f a3 1d bc 22 56 07 0f 82 a2 03 00 00 e8 e9 be 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff8880a0eb7c68
CR2: 000000000000001c
---[ end trace ee271320ff7f7faa ]---
syzbot
Oct 15, 2020, 10:11:19 AM10/15/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1423857f900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124fcba4500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5c11c5...@syzkaller.appspotmail.com
vhci_hcd vhci_hcd.0: port 3 already used
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 2 already used
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 1 already used
RSP: 0018:ffff8880a9abfc68 EFLAGS: 00010297
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: port 0 already used
RAX: ffff8880a9ab66c0 RBX: 0000000000000001 RCX: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fb24e18
R13: ffff88809fb24e08 R14: dead000000000100 R15: ffff88809fb24e20
event_handler+0x18a/0x420 drivers/usb/usbip/usbip_event.c:92
vhci_hcd: connection closed
kthread+0x30d/0x420 kernel/kthread.c:232
vhci_hcd vhci_hcd.0: port 2 already used
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff8880a9abfc68
CR2: 000000000000001c
---[ end trace ce26a6397f249f38 ]---
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=140844b4500000
dashboard link: https://syzkaller.appspot.com/bug?extid=5c11c5a041e12da1e271
compiler: gcc (GCC) 10.1.0-syz 20200507
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124fcba4500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5c11c5...@syzkaller.appspotmail.com
vhci_hcd vhci_hcd.0: port 1 already used
vhci_hcd vhci_hcd.0: port 2 already used
vhci_hcd vhci_hcd.0: port 0 already used
vhci_hcd vhci_hcd.0: port 1 already used
BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
vhci_hcd vhci_hcd.0: port 2 already used
IP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
PGD a1042067 P4D a1042067 PUD a5b89067 PMD 0
IP: kthread_stop+0x47/0x640 kernel/kthread.c:525
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 25 Comm: kworker/u4:2 Not tainted 4.14.198-syzkaller #0
Modules linked in:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usbip_event event_handler
task: ffff8880a9ab66c0 task.stack: ffff8880a9ab8000
Workqueue: usbip_event event_handler
RIP: 0010:atomic_inc arch/x86/include/asm/atomic.h:92 [inline]
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
vhci_hcd vhci_hcd.0: pdev(2) rhport(3) sockfd(9)
RIP: 0010:kthread_stop+0x47/0x640 kernel/kthread.c:525
RSP: 0018:ffff8880a9abfc68 EFLAGS: 00010297
vhci_hcd vhci_hcd.0: devid(0) speed(2) speed_str(full-speed)
vhci_hcd vhci_hcd.0: port 0 already used
RAX: ffff8880a9ab66c0 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000286
RBP: fffffffffffffffc R08: ffffffff8951e65e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809fb24e18
R13: ffff88809fb24e08 R14: dead000000000100 R15: ffff88809fb24e20
FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000001c CR3: 000000009fe5e000 CR4: 00000000001406e0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
vhci_hcd vhci_hcd.0: port 1 already used
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vhci_shutdown_connection+0x117/0x1b0 drivers/usb/usbip/vhci_hcd.c:1035
event_handler+0x18a/0x420 drivers/usb/usbip/usbip_event.c:92
vhci_hcd: connection closed
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
vhci_hcd vhci_hcd.0: port 1 already used
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
vhci_hcd vhci_hcd.0: port 2 already used
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89
vhci_hcd vhci_hcd.0: port 3 already used
Code: 00 65 8b 1d 2c a9 c4 7e 83 fb 3f 0f 87 5b 04 00 00 e8 fe be 1e 00 89
db 48 0f a3 1d bc 22 56 07 0f 82 a2 03 00 00 e8 e9 be 1e 00 <f0> ff 45 20 48 8d 7d 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa
RIP: atomic_inc arch/x86/include/asm/atomic.h:92 [inline] RSP: ffff8880a9abfc68
RIP: kthread_stop+0x47/0x640 kernel/kthread.c:525 RSP: ffff8880a9abfc68
CR2: 000000000000001c
---[ end trace ce26a6397f249f38 ]---
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