[v5.15] general protection fault in usbtest_probe
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syzbot
Jul 24, 2026, 5:55:41 PM (4 days ago) Jul 24
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 674f684f7c61 Linux 5.15.212
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1064c7b1580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=7758c8610ba9859769d6
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f55be2937b89/disk-674f684f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a19fb0ffc049/vmlinux-674f684f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/365d4529a007/bzImage-674f684f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7758c8...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000cc6fc0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807751d000 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff1100ed045db R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff888076822e00
R13: 1ffff1100ed045c0 R14: ffff888076822ed8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a16ff8 CR3: 000000007df5e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
usb_probe_interface+0x5be/0xae0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x276/0xc70 drivers/base/dd.c:595
__driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
__device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
__device_attach+0x2a7/0x480 drivers/base/dd.c:999
bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
device_add+0xbcf/0x1050 drivers/base/core.c:3427
usb_set_configuration+0x19d5/0x2030 drivers/usb/core/message.c:2223
usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x126/0x250 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x276/0xc70 drivers/base/dd.c:595
__driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
__device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
__device_attach+0x2a7/0x480 drivers/base/dd.c:999
bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
device_add+0xbcf/0x1050 drivers/base/core.c:3427
usb_new_device+0x9f6/0x15d0 drivers/usb/core/hub.c:2632
hub_port_connect drivers/usb/core/hub.c:5497 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5881
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Modules linked in:
---[ end trace 7865e06346287ffe ]---
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000cc6fc0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807751d000 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff1100ed045db R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff888076822e00
R13: 1ffff1100ed045c0 R14: ffff888076822ed8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0066a39ff8 CR3: 000000007e2c8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 50 push %rax
1: fb sti
2: 45 85 ff test %r15d,%r15d
5: 78 0a js 0x11
7: e8 e8 76 50 fb call 0xfb5076f4
c: e9 92 00 00 00 jmp 0xa3
11: 48 8b 04 24 mov (%rsp),%rax
15: 4c 8d 78 0a lea 0xa(%rax),%r15
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 bf 06 00 00 jne 0x6f5
36: 45 0f b6 3f movzbl (%r15),%r15d
3a: 44 89 fe mov %r15d,%esi
3d: 83 e6 01 and $0x1,%esi
---
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.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 674f684f7c61 Linux 5.15.212
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1064c7b1580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=7758c8610ba9859769d6
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f55be2937b89/disk-674f684f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a19fb0ffc049/vmlinux-674f684f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/365d4529a007/bzImage-674f684f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7758c8...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000cc6fc0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807751d000 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff1100ed045db R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff888076822e00
R13: 1ffff1100ed045c0 R14: ffff888076822ed8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a16ff8 CR3: 000000007df5e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
usb_probe_interface+0x5be/0xae0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x276/0xc70 drivers/base/dd.c:595
__driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
__device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
__device_attach+0x2a7/0x480 drivers/base/dd.c:999
bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
device_add+0xbcf/0x1050 drivers/base/core.c:3427
usb_set_configuration+0x19d5/0x2030 drivers/usb/core/message.c:2223
usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x126/0x250 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x276/0xc70 drivers/base/dd.c:595
__driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
__device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
__device_attach+0x2a7/0x480 drivers/base/dd.c:999
bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
device_add+0xbcf/0x1050 drivers/base/core.c:3427
usb_new_device+0x9f6/0x15d0 drivers/usb/core/hub.c:2632
hub_port_connect drivers/usb/core/hub.c:5497 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5881
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Modules linked in:
---[ end trace 7865e06346287ffe ]---
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000cc6fc0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807751d000 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff1100ed045db R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff888076822e00
R13: 1ffff1100ed045c0 R14: ffff888076822ed8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0066a39ff8 CR3: 000000007e2c8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 50 push %rax
1: fb sti
2: 45 85 ff test %r15d,%r15d
5: 78 0a js 0x11
7: e8 e8 76 50 fb call 0xfb5076f4
c: e9 92 00 00 00 jmp 0xa3
11: 48 8b 04 24 mov (%rsp),%rax
15: 4c 8d 78 0a lea 0xa(%rax),%r15
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 bf 06 00 00 jne 0x6f5
36: 45 0f b6 3f movzbl (%r15),%r15d
3a: 44 89 fe mov %r15d,%esi
3d: 83 e6 01 and $0x1,%esi
---
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.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jul 25, 2026, 8:04:30 AM (4 days ago) Jul 25
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 674f684f7c61 Linux 5.15.212
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1611109e580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1708dfde580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f55be2937b89/disk-674f684f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a19fb0ffc049/vmlinux-674f684f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/365d4529a007/bzImage-674f684f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7758c8...@syzkaller.appspotmail.com
usb 1-1: New USB device found, idVendor=0547, idProduct=2235, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
RAX: 0000000000000001 RBX: ffff888072927000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11003ee7d1b R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff88801f73e800
R13: 1ffff11003ee7d00 R14: ffff88801f73e8d8 R15: 000000000000000a
---[ end trace 791dcb4553028a2a ]---
RAX: 0000000000000001 RBX: ffff888072927000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11003ee7d1b R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff88801f73e800
R13: 1ffff11003ee7d00 R14: ffff88801f73e8d8 R15: 000000000000000a
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 674f684f7c61 Linux 5.15.212
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=7758c8610ba9859769d6
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=169e2232580000
dashboard link: https://syzkaller.appspot.com/bug?extid=7758c8610ba9859769d6
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1708dfde580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f55be2937b89/disk-674f684f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a19fb0ffc049/vmlinux-674f684f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/365d4529a007/bzImage-674f684f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7758c8...@syzkaller.appspotmail.com
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted syzkaller #0
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000d26fc0 EFLAGS: 00010202
Workqueue: usb_hub_wq hub_event
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RAX: 0000000000000001 RBX: ffff888072927000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11003ee7d1b R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff88801f73e800
R13: 1ffff11003ee7d00 R14: ffff88801f73e8d8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa82b21ee0 CR3: 0000000075308000 CR4: 00000000003506f0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
RIP: 0010:usbtest_probe+0x516/0xcb0 drivers/usb/misc/usbtest.c:2821
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RSP: 0018:ffffc90000d26fc0 EFLAGS: 00010202
Code: 50 fb 45 85 ff 78 0a e8 e8 76 50 fb e9 92 00 00 00 48 8b 04 24 4c 8d 78 0a 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 bf 06 00 00 45 0f b6 3f 44 89 fe 83 e6 01
RAX: 0000000000000001 RBX: ffff888072927000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: 1ffff11003ee7d1b R08: 000000000000001c R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000afa6265f R12: ffff88801f73e800
R13: 1ffff11003ee7d00 R14: ffff88801f73e8d8 R15: 000000000000000a
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aa82b21ee0 CR3: 0000000075308000 CR4: 00000000003506f0
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 50 push %rax
1: fb sti
2: 45 85 ff test %r15d,%r15d
5: 78 0a js 0x11
7: e8 e8 76 50 fb call 0xfb5076f4
c: e9 92 00 00 00 jmp 0xa3
11: 48 8b 04 24 mov (%rsp),%rax
15: 4c 8d 78 0a lea 0xa(%rax),%r15
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 bf 06 00 00 jne 0x6f5
36: 45 0f b6 3f movzbl (%r15),%r15d
3a: 44 89 fe mov %r15d,%esi
3d: 83 e6 01 and $0x1,%esi
---
If you want syzbot to run the reproducer, reply with:
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 50 push %rax
1: fb sti
2: 45 85 ff test %r15d,%r15d
5: 78 0a js 0x11
7: e8 e8 76 50 fb call 0xfb5076f4
c: e9 92 00 00 00 jmp 0xa3
11: 48 8b 04 24 mov (%rsp),%rax
15: 4c 8d 78 0a lea 0xa(%rax),%r15
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 bf 06 00 00 jne 0x6f5
36: 45 0f b6 3f movzbl (%r15),%r15d
3a: 44 89 fe mov %r15d,%esi
3d: 83 e6 01 and $0x1,%esi
---
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
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