Extracting prog: 3m31.43612306s
Minimizing prog: 252.04µs
Simplifying prog options: 0s
Extracting C: 30.552728652s
Simplifying C: 9m8.196029126s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f00000000c0), &(0x7f00000001c0)='\x13\x13w\xc5\xfc5\xd4\x14T\xd5\xd4\x1d)\xad\x1a`)Y\x81F\xe6\xbe\x16nA\xad\r\xbd@T\x03<\x9f3\xbb\xda\x82$\xa2\xf3\xd7r\xe7cnH\xb3<\xbfp\x83r\xe8\xf1\xb9\x93>\xc5\x12wC\xbe\"\x06 \x9e\xf0-\xf9\xcb\xf2\xf6\xe8\x80\xd38/\x00', 0x3008093, &(0x7f0000000040)={[{@iocharset={'iocharset', 0x3d, 'iso8859-9'}}]}, 0x14, 0x29c, &(0x7f0000000240)="$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")

program crashed: general protection fault in hfs_find_init
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
extracting C reproducer
testing compiled C program (duration=47.126071293s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
simplifying C reproducer
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f00000000c0), &(0x7f00000001c0)='\x13\x13w\xc5\xfc5\xd4\x14T\xd5\xd4\x1d)\xad\x1a`)Y\x81F\xe6\xbe\x16nA\xad\r\xbd@T\x03<\x9f3\xbb\xda\x82$\xa2\xf3\xd7r\xe7cnH\xb3<\xbfp\x83r\xe8\xf1\xb9\x93>\xc5\x12wC\xbe\"\x06 \x9e\xf0-\xf9\xcb\xf2\xf6\xe8\x80\xd38/\x00', 0x3008093, &(0x7f0000000040)={[{@iocharset={'iocharset', 0x3d, 'iso8859-9'}}]}, 0x14, 0x29c, &(0x7f0000000240)="$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")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
testing program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f00000000c0), &(0x7f00000001c0)='\x13\x13w\xc5\xfc5\xd4\x14T\xd5\xd4\x1d)\xad\x1a`)Y\x81F\xe6\xbe\x16nA\xad\r\xbd@T\x03<\x9f3\xbb\xda\x82$\xa2\xf3\xd7r\xe7cnH\xb3<\xbfp\x83r\xe8\xf1\xb9\x93>\xc5\x12wC\xbe\"\x06 \x9e\xf0-\xf9\xcb\xf2\xf6\xe8\x80\xd38/\x00', 0x3008093, &(0x7f0000000040)={[{@iocharset={'iocharset', 0x3d, 'iso8859-9'}}]}, 0x14, 0x29c, &(0x7f0000000240)="$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")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
testing program (duration=47.126071293s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
detailed listing:
executing program 0:
syz_mount_image$hfs(&(0x7f00000000c0), &(0x7f00000001c0)='\x13\x13w\xc5\xfc5\xd4\x14T\xd5\xd4\x1d)\xad\x1a`)Y\x81F\xe6\xbe\x16nA\xad\r\xbd@T\x03<\x9f3\xbb\xda\x82$\xa2\xf3\xd7r\xe7cnH\xb3<\xbfp\x83r\xe8\xf1\xb9\x93>\xc5\x12wC\xbe\"\x06 \x9e\xf0-\xf9\xcb\xf2\xf6\xe8\x80\xd38/\x00', 0x3008093, &(0x7f0000000040)={[{@iocharset={'iocharset', 0x3d, 'iso8859-9'}}]}, 0x14, 0x29c, &(0x7f0000000240)="$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")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
reproducing took 16m46.064391921s
repro crashed as (corrupted=false):
loop0: detected capacity change from 0 to 64
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 4321 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:hfs_find_init+0x66/0x1d0 fs/hfs/bfind.c:21
Code: 7e 18 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5c 40 8f ff 49 c7 07 00 00 00 00 48 8d 6b 40 49 89 ef 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 01 01 00 00 8b 45 00 8d 7c 00 04 be c0
RSP: 0018:ffffc900031cf508 EFLAGS: 00010202
RAX: 1ffff92000639ebf RBX: 0000000000000000 RCX: ffff88807a5a9dc0
RDX: 0000000000000000 RSI: ffffc900031cf5e0 RDI: ffffc900031cf5f0
RBP: 0000000000000040 R08: ffffc900031cf617 R09: ffffc900031cf5e0
R10: dffffc0000000000 R11: fffff52000639ec3 R12: ffff88807d252678
R13: dffffc0000000000 R14: ffffc900031cf5e0 R15: 0000000000000008
FS:  000055555d622500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ab28079c0 CR3: 0000000017fc9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_get_block+0x553/0xc50 fs/hfs/extent.c:366
 block_read_full_page+0x306/0xd40 fs/buffer.c:2290
 do_read_cache_page+0x8a1/0x1030 mm/filemap.c:-1
 read_mapping_page include/linux/pagemap.h:515 [inline]
 hfs_btree_open+0x4f9/0x1130 fs/hfs/btree.c:78
 hfs_mdb_get+0x137f/0x20d0 fs/hfs/mdb.c:199
 hfs_fill_super+0xf20/0x1590 fs/hfs/super.c:406
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd317bd820a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd098de248 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd098de2d0 RCX: 00007fd317bd820a
RDX: 00002000000000c0 RSI: 00002000000001c0 RDI: 00007ffd098de290
RBP: 00002000000000c0 R08: 00007ffd098de2d0 R09: 0000000003008093
R10: 0000000003008093 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007ffd098de290 R14: 000000000000029c R15: 0000200000000040
 </TASK>
Modules linked in:
---[ end trace 1c8046ee40cd07e7 ]---
RIP: 0010:hfs_find_init+0x66/0x1d0 fs/hfs/bfind.c:21
Code: 7e 18 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5c 40 8f ff 49 c7 07 00 00 00 00 48 8d 6b 40 49 89 ef 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 01 01 00 00 8b 45 00 8d 7c 00 04 be c0
RSP: 0018:ffffc900031cf508 EFLAGS: 00010202
RAX: 1ffff92000639ebf RBX: 0000000000000000 RCX: ffff88807a5a9dc0
RDX: 0000000000000000 RSI: ffffc900031cf5e0 RDI: ffffc900031cf5f0
RBP: 0000000000000040 R08: ffffc900031cf617 R09: ffffc900031cf5e0
R10: dffffc0000000000 R11: fffff52000639ec3 R12: ffff88807d252678
R13: dffffc0000000000 R14: ffffc900031cf5e0 R15: 0000000000000008
FS:  000055555d622500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ab28079c0 CR3: 0000000017fc9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7e 18                	jle    0x1a
   2:	4c 89 f8             	mov    %r15,%rax
   5:	48 c1 e8 03          	shr    $0x3,%rax
   9:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   e:	74 08                	je     0x18
  10:	4c 89 ff             	mov    %r15,%rdi
  13:	e8 5c 40 8f ff       	call   0xff8f4074
  18:	49 c7 07 00 00 00 00 	movq   $0x0,(%r15)
  1f:	48 8d 6b 40          	lea    0x40(%rbx),%rbp
  23:	49 89 ef             	mov    %rbp,%r15
  26:	49 c1 ef 03          	shr    $0x3,%r15
* 2a:	43 0f b6 04 2f       	movzbl (%r15,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 01 01 00 00    	jne    0x138
  37:	8b 45 00             	mov    0x0(%rbp),%eax
  3a:	8d 7c 00 04          	lea    0x4(%rax,%rax,1),%edi
  3e:	be                   	.byte 0xbe
  3f:	c0                   	.byte 0xc0

final repro crashed as (corrupted=false):
loop0: detected capacity change from 0 to 64
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 4321 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:hfs_find_init+0x66/0x1d0 fs/hfs/bfind.c:21
Code: 7e 18 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5c 40 8f ff 49 c7 07 00 00 00 00 48 8d 6b 40 49 89 ef 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 01 01 00 00 8b 45 00 8d 7c 00 04 be c0
RSP: 0018:ffffc900031cf508 EFLAGS: 00010202
RAX: 1ffff92000639ebf RBX: 0000000000000000 RCX: ffff88807a5a9dc0
RDX: 0000000000000000 RSI: ffffc900031cf5e0 RDI: ffffc900031cf5f0
RBP: 0000000000000040 R08: ffffc900031cf617 R09: ffffc900031cf5e0
R10: dffffc0000000000 R11: fffff52000639ec3 R12: ffff88807d252678
R13: dffffc0000000000 R14: ffffc900031cf5e0 R15: 0000000000000008
FS:  000055555d622500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ab28079c0 CR3: 0000000017fc9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_get_block+0x553/0xc50 fs/hfs/extent.c:366
 block_read_full_page+0x306/0xd40 fs/buffer.c:2290
 do_read_cache_page+0x8a1/0x1030 mm/filemap.c:-1
 read_mapping_page include/linux/pagemap.h:515 [inline]
 hfs_btree_open+0x4f9/0x1130 fs/hfs/btree.c:78
 hfs_mdb_get+0x137f/0x20d0 fs/hfs/mdb.c:199
 hfs_fill_super+0xf20/0x1590 fs/hfs/super.c:406
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd317bd820a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd098de248 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd098de2d0 RCX: 00007fd317bd820a
RDX: 00002000000000c0 RSI: 00002000000001c0 RDI: 00007ffd098de290
RBP: 00002000000000c0 R08: 00007ffd098de2d0 R09: 0000000003008093
R10: 0000000003008093 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007ffd098de290 R14: 000000000000029c R15: 0000200000000040
 </TASK>
Modules linked in:
---[ end trace 1c8046ee40cd07e7 ]---
RIP: 0010:hfs_find_init+0x66/0x1d0 fs/hfs/bfind.c:21
Code: 7e 18 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5c 40 8f ff 49 c7 07 00 00 00 00 48 8d 6b 40 49 89 ef 49 c1 ef 03 <43> 0f b6 04 2f 84 c0 0f 85 01 01 00 00 8b 45 00 8d 7c 00 04 be c0
RSP: 0018:ffffc900031cf508 EFLAGS: 00010202
RAX: 1ffff92000639ebf RBX: 0000000000000000 RCX: ffff88807a5a9dc0
RDX: 0000000000000000 RSI: ffffc900031cf5e0 RDI: ffffc900031cf5f0
RBP: 0000000000000040 R08: ffffc900031cf617 R09: ffffc900031cf5e0
R10: dffffc0000000000 R11: fffff52000639ec3 R12: ffff88807d252678
R13: dffffc0000000000 R14: ffffc900031cf5e0 R15: 0000000000000008
FS:  000055555d622500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ab28079c0 CR3: 0000000017fc9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7e 18                	jle    0x1a
   2:	4c 89 f8             	mov    %r15,%rax
   5:	48 c1 e8 03          	shr    $0x3,%rax
   9:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   e:	74 08                	je     0x18
  10:	4c 89 ff             	mov    %r15,%rdi
  13:	e8 5c 40 8f ff       	call   0xff8f4074
  18:	49 c7 07 00 00 00 00 	movq   $0x0,(%r15)
  1f:	48 8d 6b 40          	lea    0x40(%rbx),%rbp
  23:	49 89 ef             	mov    %rbp,%r15
  26:	49 c1 ef 03          	shr    $0x3,%r15
* 2a:	43 0f b6 04 2f       	movzbl (%r15,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 01 01 00 00    	jne    0x138
  37:	8b 45 00             	mov    0x0(%rbp),%eax
  3a:	8d 7c 00 04          	lea    0x4(%rax,%rax,1),%edi
  3e:	be                   	.byte 0xbe
  3f:	c0                   	.byte 0xc0