general protection fault in __device_attach
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syzbot
Dec 10, 2020, 11:31:11 PM12/10/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 4abf2685 Linux 4.19.162
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1548f123500000
kernel config: https://syzkaller.appspot.com/x/.config?x=38565839aa6b0d25
dashboard link: https://syzkaller.appspot.com/bug?extid=c1735a005a1a1966f79e
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+c1735a...@syzkaller.appspotmail.com
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007fff4f6cff3f R14: 00007f57c39269c0 R15: 000000000119bf8c
usb usb9: device_add(9-0:1.0) --> -12
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 19184 Comm: syz-executor.2 Not tainted 4.19.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:796
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff88823293fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11046527f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880aa6922b0 R08: 0000000000000000 R09: ffffed10154d2462
R10: ffff8880aa692317 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88823293fc0c R14: 00000000fffffff0 R15: ffff8880aa692310
FS: 00007f41ad624700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa82f2d028 CR3: 0000000232db9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
proc_ioctl+0x526/0x630 drivers/usb/core/devio.c:2187
proc_ioctl_default drivers/usb/core/devio.c:2222 [inline]
usbdev_do_ioctl+0x2773/0x3030 drivers/usb/core/devio.c:2536
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45e159
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f41ad623c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e159
RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffe4f88ed7f R14: 00007f41ad6249c0 R15: 000000000119bf8c
Modules linked in:
---[ end trace 2be73b8cfaaabdf8 ]---
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:796
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff88823293fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11046527f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880aa6922b0 R08: 0000000000000000 R09: ffffed10154d2462
R10: ffff8880aa692317 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88823293fc0c R14: 00000000fffffff0 R15: ffff8880aa692310
FS: 00007f41ad624700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e0b50 CR3: 0000000232db9000 CR4: 00000000001406e0
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 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: 4abf2685 Linux 4.19.162
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1548f123500000
kernel config: https://syzkaller.appspot.com/x/.config?x=38565839aa6b0d25
dashboard link: https://syzkaller.appspot.com/bug?extid=c1735a005a1a1966f79e
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+c1735a...@syzkaller.appspotmail.com
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007fff4f6cff3f R14: 00007f57c39269c0 R15: 000000000119bf8c
usb usb9: device_add(9-0:1.0) --> -12
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 19184 Comm: syz-executor.2 Not tainted 4.19.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:796
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff88823293fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11046527f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880aa6922b0 R08: 0000000000000000 R09: ffffed10154d2462
R10: ffff8880aa692317 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88823293fc0c R14: 00000000fffffff0 R15: ffff8880aa692310
FS: 00007f41ad624700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa82f2d028 CR3: 0000000232db9000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
proc_ioctl+0x526/0x630 drivers/usb/core/devio.c:2187
proc_ioctl_default drivers/usb/core/devio.c:2222 [inline]
usbdev_do_ioctl+0x2773/0x3030 drivers/usb/core/devio.c:2536
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45e159
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f41ad623c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e159
RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffe4f88ed7f R14: 00007f41ad6249c0 R15: 000000000119bf8c
Modules linked in:
---[ end trace 2be73b8cfaaabdf8 ]---
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:796
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff88823293fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11046527f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880aa6922b0 R08: 0000000000000000 R09: ffffed10154d2462
R10: ffff8880aa692317 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88823293fc0c R14: 00000000fffffff0 R15: ffff8880aa692310
FS: 00007f41ad624700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e0b50 CR3: 0000000232db9000 CR4: 00000000001406e0
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Sep 28, 2021, 7:32:23 AM9/28/21
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: c2276d585654 Linux 4.19.208
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17599b5f300000
kernel config: https://syzkaller.appspot.com/x/.config?x=9080caca9deef589
dashboard link: https://syzkaller.appspot.com/bug?extid=c1735a005a1a1966f79e
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a03413300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ac1b17300000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c1735a...@syzkaller.appspotmail.com
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
kobject_add_internal failed for 9-0:1.0 (error: -12 parent: usb9)
RAX: dffffc0000000000 RBX: 1ffff11014567f49 RCX: 0000000000000000
R10: ffff888095266117 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880a2b3fc0c R14: 00000000fffffff0 R15: ffff888095266110
FS: 0000555555eb3300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
proc_ioctl_default drivers/usb/core/devio.c:2227 [inline]
usbdev_do_ioctl+0x2773/0x3030 drivers/usb/core/devio.c:2541
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4e26a628 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f22ba105194 RCX: 00007f22ba0c1799
RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000006
RBP: 00007ffd4e26a640 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 56ad25ddacd3d5f0 ]---
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:798
RAX: dffffc0000000000 RBX: 1ffff11014567f49 RCX: 0000000000000000
R10: ffff888095266117 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880a2b3fc0c R14: 00000000fffffff0 R15: ffff888095266110
FS: 0000555555eb3300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
Code disassembly (best guess):
0: e8 03 42 80 3c callq 0x3c804208
5: 20 00 and %al,(%rax)
7: 0f 85 77 03 00 00 jne 0x384
d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
14: fc ff df
17: 4c 8b 65 08 mov 0x8(%rbp),%r12
1b: 49 8d bc 24 d0 00 00 lea 0xd0(%r12),%rdi
22: 00
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 06 je 0x38
32: 0f 8e 42 03 00 00 jle 0x37a
38: 45 rex.RB
39: 0f .byte 0xf
3a: b6 b4 mov $0xb4,%dh
3c: 24 d0 and $0xd0,%al
HEAD commit: c2276d585654 Linux 4.19.208
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17599b5f300000
kernel config: https://syzkaller.appspot.com/x/.config?x=9080caca9deef589
dashboard link: https://syzkaller.appspot.com/bug?extid=c1735a005a1a1966f79e
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a03413300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ac1b17300000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c1735a...@syzkaller.appspotmail.com
kobject_add_internal failed for 9-0:1.0 (error: -12 parent: usb9)
usb usb9: device_add(9-0:1.0) --> -12
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8101 Comm: syz-executor305 Not tainted 4.19.208-syzkaller #0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:798
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff8880a2b3fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11014567f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880952660b0 R08: 0000000000000000 R09: ffffed1012a4cc22
R10: ffff888095266117 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880a2b3fc0c R14: 00000000fffffff0 R15: ffff888095266110
FS: 0000555555eb3300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f22ba0f0fd0 CR3: 00000000b12d2000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
proc_ioctl+0x526/0x630 drivers/usb/core/devio.c:2192
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
proc_ioctl_default drivers/usb/core/devio.c:2227 [inline]
usbdev_do_ioctl+0x2773/0x3030 drivers/usb/core/devio.c:2541
usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f22ba0c1799
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4e26a628 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f22ba105194 RCX: 00007f22ba0c1799
RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000006
RBP: 00007ffd4e26a640 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 56ad25ddacd3d5f0 ]---
RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:798
Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00
RSP: 0018:ffff8880a2b3fa40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff11014567f49 RCX: 0000000000000000
RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0
RBP: ffff8880952660b0 R08: 0000000000000000 R09: ffffed1012a4cc22
R10: ffff888095266117 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880a2b3fc0c R14: 00000000fffffff0 R15: ffff888095266110
FS: 0000555555eb3300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f41bcde2000 CR3: 00000000b12d2000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Code disassembly (best guess):
0: e8 03 42 80 3c callq 0x3c804208
5: 20 00 and %al,(%rax)
7: 0f 85 77 03 00 00 jne 0x384
d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
14: fc ff df
17: 4c 8b 65 08 mov 0x8(%rbp),%r12
1b: 49 8d bc 24 d0 00 00 lea 0xd0(%r12),%rdi
22: 00
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 06 je 0x38
32: 0f 8e 42 03 00 00 jle 0x37a
38: 45 rex.RB
39: 0f .byte 0xf
3a: b6 b4 mov $0xb4,%dh
3c: 24 d0 and $0xd0,%al
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