general protection fault, probably for non-canonical address 0xdffffc0004000078: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000200003c0-0x00000000200003c7] CPU: 1 PID: 4149 Comm: syz-executor.5 Not tainted 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f973fd8f700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c921000 CR3: 0000000018ade000 CR4: 0000000000350ee0 Call Trace: vfs_readv+0xe5/0x160 __x64_sys_preadv+0x233/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f9742819b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f973fd8f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f974292cf60 RCX: 00007f9742819b19 RDX: 0000000000000001 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 00007f9742873f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9078120f R14: 00007f973fd8f300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f973fd8f700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c921000 CR3: 0000000018ade000 CR4: 0000000000350ee0 general protection fault, probably for non-canonical address 0xdffffc0004000078: 0000 [#2] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000200003c0-0x00000000200003c7] CPU: 1 PID: 4170 Comm: syz-executor.5 Tainted: G D 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888019f47c78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888019f47d60 RCX: ffffc90005c19000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800e015900 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f973fd4d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f973fd4d718 CR3: 0000000018ade000 CR4: 0000000000350ee0 Call Trace: vfs_readv+0xe5/0x160 __x64_sys_preadv+0x233/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f9742819b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f973fd4d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f974292d0e0 RCX: 00007f9742819b19 RDX: 0000000000000001 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 00007f9742873f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9078120f R14: 00007f973fd4d300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f973fd4d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f973fd4d718 CR3: 0000000018ade000 CR4: 0000000000350ee0 syz-executor.2 (4144) used greatest stack depth: 23576 bytes left general protection fault, probably for non-canonical address 0xdffffc0004000048: 0000 [#3] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000020000240-0x0000000020000247] CPU: 1 PID: 4178 Comm: syz-executor.3 Tainted: G D 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043867c78 EFLAGS: 00010216 RAX: 0000000020000240 RBX: ffff888043867d60 RCX: ffffc90004a10000 RDX: 0000000004000048 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 000000000000009b R08: 0000000000000007 R09: 0000000000000000 R10: 000000000000009b R11: 0000000000000001 R12: ffff888019f00f00 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491de20 FS: 00007fb5bc203700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c721000 CR3: 000000001edba000 CR4: 0000000000350ee0 Call Trace: vfs_readv+0xe5/0x160 __x64_sys_preadv+0x233/0x310 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fb5bec8db19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb5bc203188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007fb5beda0f60 RCX: 00007fb5bec8db19 RDX: 0000000000000001 RSI: 00000000200006c0 RDI: 0000000000000003 RBP: 00007fb5bece7f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000300 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe58e6a83f R14: 00007fb5bc203300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007fb5bc203700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c721000 CR3: 000000001edba000 CR4: 0000000000350ee0 general protection fault, probably for non-canonical address 0xdffffc0004000020: 0000 [#4] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000020000100-0x0000000020000107] CPU: 1 PID: 4189 Comm: syz-executor.1 Tainted: G D 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888040fe7c70 EFLAGS: 00010212 RAX: 0000000020000100 RBX: ffff888040fe7d58 RCX: ffffc90003405000 RDX: 0000000004000020 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 000000000000001c R08: 0000000000000007 R09: 0000000000000000 R10: 000000000000001c R11: 0000000000000001 R12: ffff888041483b80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8490ca00 FS: 00007f600d48e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6010028000 CR3: 0000000018936000 CR4: 0000000000350ee0 Call Trace: vfs_readv+0xe5/0x160 do_readv+0x133/0x300 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f600ff18b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f600d48e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f601002bf60 RCX: 00007f600ff18b19 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f600ff72f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5a87fbdf R14: 00007f600d48e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f600d48e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6010028000 CR3: 0000000018936000 CR4: 0000000000350ee0 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd netlink: 'syz-executor.6': attribute type 2 has an invalid length. 9pnet_fd: Insufficient options for proto=fd general protection fault, probably for non-canonical address 0xdffffc0004000020: 0000 [#5] PREEMPT SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000020000100-0x0000000020000107] CPU: 1 PID: 4219 Comm: syz-executor.1 Tainted: G D 6.3.0-rc3-next-20230327 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d7fc70 EFLAGS: 00010212 RAX: 0000000020000100 RBX: ffff888043d7fd58 RCX: ffffc90004e12000 RDX: 0000000004000020 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 000000000000001c R08: 0000000000000007 R09: 0000000000000000 R10: 000000000000001c R11: 0000000000000001 R12: ffff88801a133b80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8490ca00 FS: 00007f600d44c700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f600d44c718 CR3: 0000000018936000 CR4: 0000000000350ee0 Call Trace: vfs_readv+0xe5/0x160 do_readv+0x133/0x300 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f600ff18b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f600d44c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f601002c0e0 RCX: 00007f600ff18b19 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f600ff72f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5a87fbdf R14: 00007f600d44c300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_iter_read+0x481/0x750 Code: 00 0f 85 52 02 00 00 4d 8b 7c 24 28 e8 48 2c c6 ff 48 8b 44 24 18 80 38 00 0f 85 1c 02 00 00 48 8b 43 18 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 ef 01 00 00 48 8b 4c 24 20 48 8b 30 80 39 00 RSP: 0018:ffff888043d6fc78 EFLAGS: 00010216 RAX: 00000000200003c0 RBX: ffff888043d6fd60 RCX: ffffc9000480f000 RDX: 0000000004000078 RSI: ffffffff81855c98 RDI: 0000000000000007 RBP: 0000000000001000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000001 R12: ffff88800eb52c80 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8491d320 FS: 00007f600d44c700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f600d44c718 CR3: 0000000018936000 CR4: 0000000000350ee0 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd FAT-fs (loop4): bogus number of reserved sectors FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop4): bogus number of reserved sectors FAT-fs (loop4): Can't find a valid FAT filesystem audit: type=1400 audit(1679918571.612:15): avc: denied { tracepoint } for pid=4270 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1679918572.803:16): avc: denied { read } for pid=4315 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 random: crng reseeded on system resumption EXT4-fs: Invalid journal IO priority (must be 0-7) EXT4-fs: Invalid journal IO priority (must be 0-7) random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption loop3: detected capacity change from 0 to 40 Restarting kernel threads ... done. random: crng reseeded on system resumption 9pnet: Could not find request transport: rdma 9pnet: Could not find request transport: rdma random: crng reseeded on system resumption Restarting kernel threads ... done. 9pnet: Could not find request transport: rdma syz-executor.4 calls setitimer() with new_value NULL pointer. Misfeature support will be removed 9pnet: Could not find request transport: rdma 9pnet: Could not find request transport: rdma EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: none. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: none. audit: type=1326 audit(1679918574.815:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4593 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9742819b19 code=0x0 loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop6): group descriptors corrupted! loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop6): group descriptors corrupted! Bluetooth: hci0: Opcode 0x c03 failed: -4 Bluetooth: hci0: Opcode 0x c03 failed: -4 Bluetooth: hci0: Opcode 0x c03 failed: -4 Bluetooth: hci0: Opcode 0x c03 failed: -4 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 52 02 test %edx,0x2(%rdx) 5: 00 00 add %al,(%rax) 7: 4d 8b 7c 24 28 mov 0x28(%r12),%r15 c: e8 48 2c c6 ff callq 0xffc62c59 11: 48 8b 44 24 18 mov 0x18(%rsp),%rax 16: 80 38 00 cmpb $0x0,(%rax) 19: 0f 85 1c 02 00 00 jne 0x23b 1f: 48 8b 43 18 mov 0x18(%rbx),%rax 23: 48 89 c2 mov %rax,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 42 80 3c 32 00 cmpb $0x0,(%rdx,%r14,1) <-- trapping instruction 2f: 0f 85 ef 01 00 00 jne 0x224 35: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx 3a: 48 8b 30 mov (%rax),%rsi 3d: 80 39 00 cmpb $0x0,(%rcx)