Extracting prog: 33.95331932s
Minimizing prog: 43.45µs
Simplifying prog options: 0s
Extracting C: 1m24.279681394s
Simplifying C: 7m49.265324944s


extracting reproducer from 33 programs
first checking the prog from the crash report
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(&(0x7f0000000180), &(0x7f00000000c0)='./bus\x00', 0x0, &(0x7f0000000880)={[{@part={'part', 0x3d, 0xd}}, {@uid}, {@file_umask={'file_umask', 0x3d, 0x2}}, {@umask={'umask', 0x3d, 0x6}}]}, 0x0, 0x2b8, &(0x7f0000000580)="$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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=43.871782021s, {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$hfs
program crashed: general protection fault in hfs_find_init
simplifying C reproducer
testing compiled C program (duration=43.871782021s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {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$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {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$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {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$hfs
program crashed: general protection fault in hfs_find_init
testing compiled C program (duration=43.871782021s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$hfs
program crashed: general protection fault in hfs_find_init
testing program (duration=43.871782021s, {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(&(0x7f0000000180), &(0x7f00000000c0)='./bus\x00', 0x0, &(0x7f0000000880)={[{@part={'part', 0x3d, 0xd}}, {@uid}, {@file_umask={'file_umask', 0x3d, 0x2}}, {@umask={'umask', 0x3d, 0x6}}]}, 0x0, 0x2b8, &(0x7f0000000580)="$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")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
testing program (duration=43.871782021s, {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(&(0x7f0000000180), &(0x7f00000000c0)='./bus\x00', 0x0, &(0x7f0000000880)={[{@part={'part', 0x3d, 0xd}}, {@uid}, {@file_umask={'file_umask', 0x3d, 0x2}}, {@umask={'umask', 0x3d, 0x6}}]}, 0x0, 0x2b8, &(0x7f0000000580)="$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")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
testing program (duration=43.871782021s, {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(&(0x7f0000000180), &(0x7f00000000c0)='./bus\x00', 0x0, &(0x7f0000000880)={[{@part={'part', 0x3d, 0xd}}, {@uid}, {@file_umask={'file_umask', 0x3d, 0x2}}, {@umask={'umask', 0x3d, 0x6}}]}, 0x0, 0x2b8, &(0x7f0000000580)="$eJzs3T1v014Ux/HfddJ/0wf17z6gSoyFSkyIlgWxgFBfBANClCZIVaMiQZGACTEjxIbEzsaMeAMsTIg3ABMTI0MlBqN7bKdJajtuSesEvh8plRvfc31unNj3RIotAP+sGxtf317+7h9Oqqkm6aoUSGpIdUlntNx4tLu3vdduNS1ieiKzo5pF+IdTHOl+9rfZ2m1lhbq+/0MfX9es9YITFUVR9K3qJFA5+/RnCKTJ5PNs6xs9a/87peyG71nVCVTM7WtfjzVXdR4AgGol5//0MZtMy4NAWk1O+xnn//G1X3UCFes6/1uVFTm/f6ds1UG9Z5WZXx+kVWJBj7lrbJYY9E0wXW9Vedj/FjV1b7vdurh1v90M9FzXEl3NluxvM65ZUwOyXSlINsPgseeZsTFM+DGs5+S/eJwtvj56Kh3uk/vsbrtQb9TszP/qkfO7yfZUaHsq7ATE+V/K7zGOilvljHLeNnI2rRg+vCsxykZ2RdLZ4rx6vyAI0zxf5ZQl9vRCX1Q8urUBo1vMjFofELXUH3Xwbs6PPL5y1Zh76W66Ff3Qe210zf8D/2qvqswn07exlsk7o3A8dWsZlkgsKJU+ysr+ni71Qnd1RXMPnzzd2Wy3Ww9GdiGdcfhnaiOQT8GCT/NEeq7rNEaRvmFG48UcgYX04D38nvXH/dQ0KVv4FcWGlqE/Vu9stosOHlNDODxhFBzsfS3fqjoZVMHPu1xc/3XVK9dtna+TQpunTyhrnh4N6ryrx7Wc2mDB/k4fqYKbya/gytZc5y5I5wu2+LG32zDJ8y/hNvRFd/j+HwAAAAAAAAAAAAAAAAAAYNyU+2HAZNL6eL8rqHiIAAAAAAAAAAAAAAAAAAAAAACMvaPf//eQzjWk++//Gz/bdVXvnPv/2h0+4nst2FW6uf8vcDp+BwAA//+0ZHY3")

program crashed: general protection fault in hfs_find_init
validation run: crashed=true
reproducing took 14m14.22775378s
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: 4449 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 7c 94 90 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:ffffc9000329f4e8 EFLAGS: 00010202
RAX: 1ffff92000653ebb RBX: 0000000000000000 RCX: ffff88802572bb80
RDX: 0000000000000000 RSI: ffffc9000329f5c0 RDI: ffffc9000329f5d0
RBP: 0000000000000040 R08: dffffc0000000000 R09: ffffc9000329f5c0
R10: fffff52000653ebf R11: 1ffff92000653eb8 R12: ffff88807ad10678
R13: dffffc0000000000 R14: ffffc9000329f5c0 R15: 0000000000000008
FS:  000055558037a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4834ded30 CR3: 000000005faac000 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+0x518/0xbd0 fs/hfs/extent.c:366
 block_read_full_page+0x2e8/0xd10 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+0x549/0x11c0 fs/hfs/btree.c:78
 hfs_mdb_get+0x12fc/0x2030 fs/hfs/mdb.c:199
 hfs_fill_super+0xdf3/0x13f0 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+0x2d6/0x3c0 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: 0033:0x7f90f064beea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe4cc25e98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffe4cc25f20 RCX: 00007f90f064beea
RDX: 0000200000000180 RSI: 00002000000000c0 RDI: 00007ffe4cc25ee0
RBP: 0000200000000180 R08: 00007ffe4cc25f20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007ffe4cc25ee0 R14: 00000000000002b8 R15: 0000200000000880
 </TASK>
Modules linked in:
---[ end trace bccb894b481ec80f ]---
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 7c 94 90 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:ffffc9000329f4e8 EFLAGS: 00010202
RAX: 1ffff92000653ebb RBX: 0000000000000000 RCX: ffff88802572bb80
RDX: 0000000000000000 RSI: ffffc9000329f5c0 RDI: ffffc9000329f5d0
RBP: 0000000000000040 R08: dffffc0000000000 R09: ffffc9000329f5c0
R10: fffff52000653ebf R11: 1ffff92000653eb8 R12: ffff88807ad10678
R13: dffffc0000000000 R14: ffffc9000329f5c0 R15: 0000000000000008
FS:  000055558037a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4834ded30 CR3: 000000005faac000 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 7c 94 90 ff       	call   0xff909494
  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: 4449 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 7c 94 90 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:ffffc9000329f4e8 EFLAGS: 00010202
RAX: 1ffff92000653ebb RBX: 0000000000000000 RCX: ffff88802572bb80
RDX: 0000000000000000 RSI: ffffc9000329f5c0 RDI: ffffc9000329f5d0
RBP: 0000000000000040 R08: dffffc0000000000 R09: ffffc9000329f5c0
R10: fffff52000653ebf R11: 1ffff92000653eb8 R12: ffff88807ad10678
R13: dffffc0000000000 R14: ffffc9000329f5c0 R15: 0000000000000008
FS:  000055558037a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4834ded30 CR3: 000000005faac000 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+0x518/0xbd0 fs/hfs/extent.c:366
 block_read_full_page+0x2e8/0xd10 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+0x549/0x11c0 fs/hfs/btree.c:78
 hfs_mdb_get+0x12fc/0x2030 fs/hfs/mdb.c:199
 hfs_fill_super+0xdf3/0x13f0 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+0x2d6/0x3c0 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: 0033:0x7f90f064beea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe4cc25e98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffe4cc25f20 RCX: 00007f90f064beea
RDX: 0000200000000180 RSI: 00002000000000c0 RDI: 00007ffe4cc25ee0
RBP: 0000200000000180 R08: 00007ffe4cc25f20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007ffe4cc25ee0 R14: 00000000000002b8 R15: 0000200000000880
 </TASK>
Modules linked in:
---[ end trace bccb894b481ec80f ]---
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 7c 94 90 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:ffffc9000329f4e8 EFLAGS: 00010202
RAX: 1ffff92000653ebb RBX: 0000000000000000 RCX: ffff88802572bb80
RDX: 0000000000000000 RSI: ffffc9000329f5c0 RDI: ffffc9000329f5d0
RBP: 0000000000000040 R08: dffffc0000000000 R09: ffffc9000329f5c0
R10: fffff52000653ebf R11: 1ffff92000653eb8 R12: ffff88807ad10678
R13: dffffc0000000000 R14: ffffc9000329f5c0 R15: 0000000000000008
FS:  000055558037a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4834ded30 CR3: 000000005faac000 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 7c 94 90 ff       	call   0xff909494
  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