Re: [PATCH] x86/asm/entry/64: Clean up entry_64.S

From: Sasha Levin
Date: Mon Jul 06 2015 - 11:02:31 EST

On 06/08/2015 02:51 PM, Ingo Molnar wrote:
> From 4d7321381e5c7102a3d3faf0a0a0035a09619612 Mon Sep 17 00:00:00 2001
> From: Ingo Molnar <mingo@xxxxxxxxxx>
> Date: Mon, 8 Jun 2015 20:43:07 +0200
> Subject: [PATCH] x86/asm/entry/64: Clean up entry_64.S
>
> Make the 64-bit syscall entry code a bit more readable:
>
> - use consistent assembly coding style similar to the other entry_*.S files
>
> - remove old comments that are not true anymore
>
> - eliminate whitespace noise
>
> - use consistent vertical spacing
>
> - fix various comments
>
> - reorganize entry point generation tables to be more readable
>
> No code changed:
>
> # arch/x86/entry/entry_64.o:
>
> text data bss dec hex filename
> 12282 0 0 12282 2ffa entry_64.o.before
> 12282 0 0 12282 2ffa entry_64.o.after
>
> md5:
> cbab1f2d727a2a8a87618eeb79f391b7 entry_64.o.before.asm
> cbab1f2d727a2a8a87618eeb79f391b7 entry_64.o.after.asm

Hey Ingo,

I've started seeing the fuzzer hitting the BUG() at arch/x86/kernel/nmi.c:533. git
blame pointed to this patch. I know that you didn't see any changes in the compiled
file in your testcase, but I do see changes in mine.

Below is what the fuzzer was hitting, and lower are the differences in the compiled
output of entry_64.o.

[3157054.661763] ------------[ cut here ]------------
[3157054.662552] kernel BUG at arch/x86/kernel/nmi.c:533!
[3157054.663277] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[3157054.664164] Dumping ftrace buffer:
[3157054.664740] (ftrace buffer empty)
[3157054.665274] Modules linked in:
[3157054.665768] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157054.667203] task: ffff880408813000 ti: ffff8803d29c8000 task.ti: ffff8803d29c8000
[3157054.668256] RIP: do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.669378] RSP: 0018:ffff88077800bed8 EFLAGS: 00010006
[3157054.670141] ==================================================================
[3157054.671268] BUG: KASan: out of bounds on stack in __show_regs+0x7f6/0x940 at addr ffff88077800be50
[3157054.674604] Read of size 8 by task trinity-main/11446
[3157054.676521] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157054.679451] flags: 0x42fffff80000400(reserved)
[3157054.681237] page dumped because: kasan: bad access detected
[3157054.683326] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157054.687097] ffff88077800be50 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157054.690303] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157054.693365] ffff88077800bab8 ffffffffa0abe0b3 0000000000000082 ffffffffa2fe39e4
[3157054.696209] Call Trace:
[3157054.697180] <NMI> dump_stack (lib/dump_stack.c:52)
[3157054.699390] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157054.701663] ? printk (kernel/printk/printk.c:1896)
[3157054.703531] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.705553] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157054.708014] ? __show_regs (arch/x86/kernel/process_64.c:68)
[3157054.710046] __show_regs (arch/x86/kernel/process_64.c:68)
[3157054.712066] ? printk (kernel/printk/printk.c:1896)
[3157054.713878] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.715875] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157054.718336] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157054.720619] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157054.722530] __die (arch/x86/kernel/dumpstack.c:294)
[3157054.724290] die (arch/x86/kernel/dumpstack.c:316)
[3157054.725962] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157054.727805] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157054.729843] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157054.732211] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.734101] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157054.736165] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157054.738126] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157054.740133] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157054.742997] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157054.744991] invalid_op (arch/x86/entry/entry_64.S:925)
[3157054.746873] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.748769] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157054.750658] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157054.752712] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.754514] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.756313] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.758106] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157054.760665] <<EOE>> <UNK>
[3157054.761826] Memory state around the buggy address:
[3157054.763672] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.766266] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157054.768848] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157054.771469] ^
[3157054.774302] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.776910] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.779636] ==================================================================
[3157054.784428] RAX: 0000000080120001 RBX: 0000000000000001 RCX: 00000000c0000101
[3157054.801838] RDX: 1ffffffff4691cd0 RSI: ffffffffa0c10620 RDI: ffffffffa344dc00
[3157054.804414] ==================================================================
[3157054.807050] BUG: KASan: out of bounds on stack in __show_regs+0x897/0x940 at addr ffff88077800be48
[3157054.810374] Read of size 8 by task trinity-main/11446
[3157054.813129] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157054.816012] flags: 0x42fffff80000400(reserved)
[3157054.817718] page dumped because: kasan: bad access detected
[3157054.819766] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157054.823531] ffff88077800be48 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157054.826320] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157054.829107] ffff88077800bab8 ffffffffa0abe0b3 0000000000000082 ffffffffa2fe39e4
[3157054.831922] Call Trace:
[3157054.832864] <NMI> dump_stack (lib/dump_stack.c:52)
[3157054.835025] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157054.837224] ? printk (kernel/printk/printk.c:1896)
[3157054.839040] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.841011] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157054.843454] ? __show_regs (arch/x86/kernel/process_64.c:72)
[3157054.845477] __show_regs (arch/x86/kernel/process_64.c:72)
[3157054.847442] ? printk (kernel/printk/printk.c:1896)
[3157054.849276] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.851272] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157054.853949] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157054.856236] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157054.858114] __die (arch/x86/kernel/dumpstack.c:294)
[3157054.859871] die (arch/x86/kernel/dumpstack.c:316)
[3157054.861624] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157054.863479] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157054.865508] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157054.867842] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.869736] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157054.871910] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157054.872787] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157054.873674] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157054.874725] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157054.875605] invalid_op (arch/x86/entry/entry_64.S:925)
[3157054.876439] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.877275] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157054.878112] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157054.879012] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.879810] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.880605] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.881678] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157054.882830] <<EOE>> <UNK>
[3157054.883319] Memory state around the buggy address:
[3157054.884153] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.885300] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157054.886443] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157054.887580] ^
[3157054.888469] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.889605] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.890743] ==================================================================
[3157054.891910] RBP: ffff88077800bee8 R08: 0000000000000001 R09: 000000000000002e
[3157054.893039] ==================================================================
[3157054.894188] BUG: KASan: out of bounds on stack in __show_regs+0x87f/0x940 at addr ffff88077800be40
[3157054.895585] Read of size 8 by task trinity-main/11446
[3157054.896401] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157054.897657] flags: 0x42fffff80000400(reserved)
[3157054.898431] page dumped because: kasan: bad access detected
[3157054.899325] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157054.900940] ffff88077800be40 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157054.902128] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157054.903273] ffff88077800bab8 ffffffffa0abe0b3 0000000000000082 ffffffffa2fe39e4
[3157054.904415] Call Trace:
[3157054.904793] <NMI> dump_stack (lib/dump_stack.c:52)
[3157054.905668] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157054.906527] ? printk (kernel/printk/printk.c:1896)
[3157054.907254] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.908034] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157054.908973] ? __show_regs (arch/x86/kernel/process_64.c:74)
[3157054.909774] __show_regs (arch/x86/kernel/process_64.c:74)
[3157054.910558] ? printk (kernel/printk/printk.c:1896)
[3157054.911555] ? bitmap_weight (include/linux/bitmap.h:303)
[3157054.913530] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157054.916152] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157054.918430] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157054.920318] __die (arch/x86/kernel/dumpstack.c:294)
[3157054.922112] die (arch/x86/kernel/dumpstack.c:316)
[3157054.923801] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157054.925643] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157054.927671] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157054.930005] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.931948] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157054.934024] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157054.935990] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157054.937983] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157054.940346] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157054.942337] invalid_op (arch/x86/entry/entry_64.S:925)
[3157054.944211] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157054.946085] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157054.947953] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157054.949950] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.951993] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.953778] ? debug (arch/x86/entry/entry_64.S:1067)
[3157054.955568] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157054.958110] <<EOE>> <UNK>
[3157054.959168] Memory state around the buggy address:
[3157054.960999] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.963654] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157054.966249] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157054.968833] ^
[3157054.970757] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.973408] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157054.975995] ==================================================================
[3157054.978574] ==================================================================
[3157054.981228] BUG: KASan: out of bounds on stack in __show_regs+0x7ae/0x940 at addr ffff88077800be58
[3157054.984458] Read of size 8 by task trinity-main/11446
[3157054.986295] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157054.989141] flags: 0x42fffff80000400(reserved)
[3157054.990824] page dumped because: kasan: bad access detected
[3157054.992895] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157054.996590] ffff88077800be58 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157054.999365] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157055.002164] 0000000000000010 ffffffff00000000 0000000000000082 ffffed00ef0017c8
[3157055.004929] Call Trace:
[3157055.005866] <NMI> dump_stack (lib/dump_stack.c:52)
[3157055.007983] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157055.010155] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157055.012580] ? __show_regs (arch/x86/kernel/process_64.c:74)
[3157055.014603] __show_regs (arch/x86/kernel/process_64.c:74)
[3157055.016574] ? printk (kernel/printk/printk.c:1896)
[3157055.018396] ? bitmap_weight (include/linux/bitmap.h:303)
[3157055.020358] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157055.023068] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157055.025348] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157055.027228] __die (arch/x86/kernel/dumpstack.c:294)
[3157055.028983] die (arch/x86/kernel/dumpstack.c:316)
[3157055.030664] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157055.032552] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157055.034572] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157055.036891] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.038782] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157055.040840] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157055.042835] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157055.044842] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157055.047189] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157055.049155] invalid_op (arch/x86/entry/entry_64.S:925)
[3157055.051022] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.052945] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157055.054819] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157055.056824] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.058595] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.060379] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.062197] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157055.064731] <<EOE>> <UNK>
[3157055.065800] Memory state around the buggy address:
[3157055.067623] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.070203] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157055.072827] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157055.075416] ^
[3157055.077617] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.080205] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.083104] ==================================================================
[3157055.085692] ==================================================================
[3157055.088288] BUG: KASan: out of bounds on stack in __show_regs+0x8e2/0x940 at addr ffff88077800be60
[3157055.091538] Read of size 8 by task trinity-main/11446
[3157055.093378] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157055.096225] flags: 0x42fffff80000400(reserved)
[3157055.097905] page dumped because: kasan: bad access detected
[3157055.099925] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157055.103650] ffff88077800be60 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157055.106430] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157055.109192] 0000000000000010 ffffffff00000000 0000000000000082 ffffed00ef0017cb
[3157055.111989] Call Trace:
[3157055.112927] <NMI> dump_stack (lib/dump_stack.c:52)
[3157055.115044] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157055.117220] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157055.119608] ? __show_regs (arch/x86/kernel/process_64.c:74)
[3157055.121667] __show_regs (arch/x86/kernel/process_64.c:74)
[3157055.123627] ? printk (kernel/printk/printk.c:1896)
[3157055.125449] ? bitmap_weight (include/linux/bitmap.h:303)
[3157055.127429] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157055.130055] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157055.132355] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157055.134243] __die (arch/x86/kernel/dumpstack.c:294)
[3157055.135988] die (arch/x86/kernel/dumpstack.c:316)
[3157055.137648] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157055.139500] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157055.141530] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157055.143859] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.145741] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157055.147811] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157055.149771] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157055.151856] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157055.154231] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157055.156219] invalid_op (arch/x86/entry/entry_64.S:925)
[3157055.158111] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.159993] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157055.161923] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157055.163912] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.165701] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.167472] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.169247] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157055.171839] <<EOE>> <UNK>
[3157055.172903] Memory state around the buggy address:
[3157055.174732] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.177327] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157055.179921] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157055.182583] ^
[3157055.184885] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.187483] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.190072] ==================================================================
[3157055.191450] pps pps0: PPS event at 4682.682479766
[3157055.191456] pps pps0: capture assert seq #4932
[3157055.196385] R10: ffffed014e1e4883 R11: ffffed014e1e4881 R12: ffff88077800bef8
[3157055.198934] ==================================================================
[3157055.201581] BUG: KASan: out of bounds on stack in __show_regs+0x901/0x940 at addr ffff88077800be30
[3157055.204771] Read of size 8 by task trinity-main/11446
[3157055.206617] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157055.209469] flags: 0x42fffff80000400(reserved)
[3157055.211321] page dumped because: kasan: bad access detected
[3157055.213356] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157055.217047] ffff88077800be30 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157055.219821] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157055.222620] ffff88077800bab8 ffffffffa0abe0b3 0000000000000082 ffffffffa2fe39e4
[3157055.225392] Call Trace:
[3157055.226326] <NMI> dump_stack (lib/dump_stack.c:52)
[3157055.228460] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157055.230633] ? printk (kernel/printk/printk.c:1896)
[3157055.232508] ? bitmap_weight (include/linux/bitmap.h:303)
[3157055.234471] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157055.236860] ? __show_regs (arch/x86/kernel/process_64.c:76)
[3157055.238885] __show_regs (arch/x86/kernel/process_64.c:76)
[3157055.240849] ? printk (kernel/printk/printk.c:1896)
[3157055.242726] ? bitmap_weight (include/linux/bitmap.h:303)
[3157055.244694] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157055.247332] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157055.249599] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157055.251525] __die (arch/x86/kernel/dumpstack.c:294)
[3157055.253277] die (arch/x86/kernel/dumpstack.c:316)
[3157055.254948] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157055.256791] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157055.258825] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157055.261184] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.263075] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157055.265127] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157055.267091] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157055.269083] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157055.271489] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157055.273463] invalid_op (arch/x86/entry/entry_64.S:925)
[3157055.275344] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.277229] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157055.279103] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157055.281096] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.283115] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.284903] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.286702] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157055.289236] <<EOE>> <UNK>
[3157055.290296] Memory state around the buggy address:
[3157055.292224] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.294827] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157055.297424] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157055.300003] ^
[3157055.301810] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.304413] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.307011] ==================================================================
[3157055.309596] ==================================================================
[3157055.312309] BUG: KASan: out of bounds on stack in __show_regs+0x73e/0x940 at addr ffff88077800be38
[3157055.315505] Read of size 8 by task trinity-main/11446
[3157055.317354] page:ffffea001de002c0 count:1 mapcount:0 mapping: (null) index:0x0
[3157055.320204] flags: 0x42fffff80000400(reserved)
[3157055.321928] page dumped because: kasan: bad access detected
[3157055.323953] CPU: 16 PID: 11446 Comm: trinity-main Not tainted 4.1.0-next-20150703-sasha-00040-gd868f14-dirty #2292
[3157055.327653] ffff88077800be38 000000009c65e33f ffff88077800b9f8 ffffffffa0ac8938
[3157055.330417] 1ffffd4003bc0058 ffff88077800ba88 ffff88077800ba78 ffffffff9759796e
[3157055.333251] 0000000000000010 ffffffff00000000 0000000000000082 ffffed00ef0017c6
[3157055.336017] Call Trace:
[3157055.336958] <NMI> dump_stack (lib/dump_stack.c:52)
[3157055.339087] kasan_report_error (mm/kasan/report.c:132 mm/kasan/report.c:193)
[3157055.341276] __asan_report_load8_noabort (mm/kasan/report.c:230 mm/kasan/report.c:251)
[3157055.343674] ? __show_regs (arch/x86/kernel/process_64.c:76)
[3157055.345699] __show_regs (arch/x86/kernel/process_64.c:76)
[3157055.347659] ? printk (kernel/printk/printk.c:1896)
[3157055.349473] ? bitmap_weight (include/linux/bitmap.h:303)
[3157055.351520] ? start_thread_common.constprop.0 (arch/x86/kernel/process_64.c:58)
[3157055.354146] ? dump_stack_print_info (kernel/printk/printk.c:3121)
[3157055.356412] show_regs (arch/x86/kernel/dumpstack_64.c:313)
[3157055.358289] __die (arch/x86/kernel/dumpstack.c:294)
[3157055.360045] die (arch/x86/kernel/dumpstack.c:316)
[3157055.361735] do_trap (arch/x86/kernel/traps.c:214 arch/x86/kernel/traps.c:260)
[3157055.363595] do_error_trap (arch/x86/kernel/traps.c:298 include/linux/jump_label.h:125 include/linux/context_tracking_state.h:29 include/linux/context_tracking.h:46 arch/x86/kernel/traps.c:302)
[3157055.365653] ? do_device_not_available (arch/x86/kernel/traps.c:291)
[3157055.367973] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.369858] ? kvm_clock_read (./arch/x86/include/asm/preempt.h:87 arch/x86/kernel/kvmclock.c:86)
[3157055.371934] ? sched_clock (arch/x86/kernel/tsc.c:305)
[3157055.373889] ? nmi_handle (arch/x86/kernel/nmi.c:134)
[3157055.375882] ? trace_hardirqs_off_thunk (arch/x86/entry/thunk_64.S:40)
[3157055.378249] do_invalid_op (arch/x86/kernel/traps.c:313)
[3157055.380216] invalid_op (arch/x86/entry/entry_64.S:925)
[3157055.382139] ? do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.384024] ? do_nmi (arch/x86/kernel/nmi.c:515 arch/x86/kernel/nmi.c:531)
[3157055.385907] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157055.387896] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.389669] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.391502] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.393282] <<EOE>> <#DB> ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157055.395816] <<EOE>> <UNK>
[3157055.396865] Memory state around the buggy address:
[3157055.398693] ffff88077800bd00: f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.401307] ffff88077800bd80: 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00
[3157055.403897] >ffff88077800be00: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[3157055.406472] ^
[3157055.408309] ffff88077800be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.410885] ffff88077800bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[3157055.413508] ==================================================================
[3157055.416083] R13: 000b375311a5d4ab R14: ffffffffa3485190 R15: ffffffffa3485180
[3157055.418637] FS: 00007f6d93c6f700(0000) GS:ffff880778000000(0000) knlGS:0000000000000000
[3157055.421726] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3157055.423798] CR2: 0000000004378000 CR3: 00000003d2987000 CR4: 00000000000007e0
[3157055.426363] DR0: ffffffff81000000 DR1: 0000000000000000 DR2: 0000000000000000
[3157055.428933] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[3157055.431526] Stack:
[3157055.432310] 0000000000000001 0000000004378000 ffff88077800be98 ffffffffa0b2ff6f
[3157055.435066] ffffffffa3485180 ffffffffa3485190 000b375311a5d4ab 0000000000000000
[3157055.437846] ffff88077800be98 dffffc0000000000 ffffed014e1e4881 ffffed014e1e4883
[3157055.440612] Call Trace:
[3157055.441576] <NMI>
[3157055.442347] end_repeat_nmi (arch/x86/entry/entry_64.S:1435)
[3157055.444426] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.446211] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.447992] ? debug (arch/x86/entry/entry_64.S:1067)
[3157055.449762] <<EOE>>
[3157055.450579] <#DB> [3157055.451465] ? nmi_handle (arch/x86/kernel/nmi.c:134 include/linux/jump_label.h:125 include/trace/events/nmi.h:10 arch/x86/kernel/nmi.c:135)
[3157055.453456] <<EOE>>
[3157055.454274] <UNK> Code: c9 ff 68 85 c0 75 28 5b 41 5c 5d c3 4c 89 e7 e8 4a fc ff ff eb 8c e8 73 8a 02 00 65 c7 05 78 c9 ff 68 01 00 00 00 e9 04 ff ff ff <0f> 0b 0f 0b e8 8a 8b 02 00 65 c7 05 5f c9 ff 68 00 00 00 00 eb
All code
========
0: c9 leaveq
1: ff 68 85 ljmpq *-0x7b(%rax)
4: c0 (bad)
5: 75 28 jne 0x2f
7: 5b pop %rbx
8: 41 5c pop %r12
a: 5d pop %rbp
b: c3 retq
c: 4c 89 e7 mov %r12,%rdi
f: e8 4a fc ff ff callq 0xfffffffffffffc5e
14: eb 8c jmp 0xffffffffffffffa2
16: e8 73 8a 02 00 callq 0x28a8e
1b: 65 c7 05 78 c9 ff 68 movl $0x1,%gs:0x68ffc978(%rip) # 0x68ffc99e
22: 01 00 00 00
26: e9 04 ff ff ff jmpq 0xffffffffffffff2f
2b:* 0f 0b ud2 <-- trapping instruction
2d: 0f 0b ud2
2f: e8 8a 8b 02 00 callq 0x28bbe
34: 65 c7 05 5f c9 ff 68 movl $0x0,%gs:0x68ffc95f(%rip) # 0x68ffc99e
3b: 00 00 00 00
3f: eb 00 jmp 0x41

Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 0f 0b ud2
4: e8 8a 8b 02 00 callq 0x28b93
9: 65 c7 05 5f c9 ff 68 movl $0x0,%gs:0x68ffc95f(%rip) # 0x68ffc973
10: 00 00 00 00
14: eb 00 jmp 0x16
[3157055.463226] RIP do_nmi (arch/x86/kernel/nmi.c:533 (discriminator 1))
[3157055.465196] RSP <ffff88077800bed8>
[3157055.466582] ---[ end trace 778a5a25355bda0f ]---
[3157055.468290] Kernel panic - not syncing: Fatal exception in interrupt
[3157055.470836] Dumping ftrace buffer:
[3157055.471807] (ftrace buffer empty)
[3157055.472408] Kernel Offset: 0x16000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[3157055.474066] Rebooting in 1 seconds..




--- entry.before.o.cmd 2015-07-06 10:48:32.110189938 -0400
+++ entry.after.o.cmd 2015-07-06 10:48:23.509645442 -0400
@@ -1,5 +1,5 @@

-entry.before.o: file format elf64-x86-64
+entry.after.o: file format elf64-x86-64


Disassembly of section .entry.text:
@@ -3961,8 +3961,8 @@
3b: 09 02 or %eax,(%rdx)
...
3d: R_X86_64_64 .entry.text
- 45: 03 3a add (%rdx),%edi
- 47: 01 3d 03 d6 00 c8 add %edi,-0x37ff29fd(%rip) # ffffffffc800d650 <ignore_sysret+0xffffffffc800b1f0>
+ 45: 03 33 add (%rbx),%esi
+ 47: 01 3d 03 d5 00 c8 add %edi,-0x37ff2afd(%rip) # ffffffffc800d550 <ignore_sysret+0xffffffffc800b0f0>
4d: 44 91 rex.R xchg %eax,%ecx
4f: 93 xchg %eax,%ebx
50: 2f (bad)
@@ -3998,7 +3998,7 @@
94: 09 58 84 or %ebx,-0x7c(%rax)
97: 59 pop %rcx
98: 5c pop %rsp
- 99: f3 3d 2f 2f 4b 5e repz cmp $0x5e4b2f2f,%eax
+ 99: f3 3d 2f 2f 4b 60 repz cmp $0x604b2f2f,%eax
9f: 4b 2f rex.WXB (bad)
a1: 59 pop %rcx
a2: 83 21 59 andl $0x59,(%rcx)
@@ -4010,7 +4010,7 @@
bc: bb 83 59 5c 67 mov $0x675c5983,%ebx
c1: f8 clc
c2: 59 pop %rcx
- c3: 83 3d 03 0e 2e 4b 4c cmpl $0x4c,0x4b2e0e03(%rip) # 4b2e0ecd <ignore_sysret+0x4b2dea6d>
+ c3: 83 3d 03 0f 2e 4b 4d cmpl $0x4d,0x4b2e0f03(%rip) # 4b2e0fcd <ignore_sysret+0x4b2deb6d>
ca: 3d 30 91 30 59 cmp $0x59309130,%eax
cf: 83 03 10 addl $0x10,(%rbx)
d2: 2e 75 32 jne,pn 107 <.debug_line+0x107>
@@ -4038,14 +4038,14 @@
104: 03 0b add (%rbx),%ecx
106: c8 76 2f 22 enterq $0x2f76,$0x22
10a: 5a pop %rdx
- 10b: 08 bc 03 09 82 6a 3d or %bh,0x3d6a8209(%rbx,%rax,1)
+ 10b: 08 bc 03 09 82 6c 3d or %bh,0x3d6c8209(%rbx,%rax,1)
112: 2f (bad)
113: 83 08 bb orl $0xffffffbb,(%rax)
116: 03 0f add (%rdi),%ecx
118: ba 03 38 02 93 mov $0x93023803,%edx
11d: 0d 01 59 02 68 or $0x68025901,%eax
122: 15 83 59 85 22 adc $0x22855983,%eax
- 127: 4c 83 31 f7 rex.WR xorq $0xfffffffffffffff7,(%rcx)
+ 127: 4c 83 31 f6 rex.WR xorq $0xfffffffffffffff6,(%rcx)
12b: 5b pop %rbx
12c: 3d 2f 6c 67 f4 cmp $0xf4676c2f,%eax
131: 67 35 91 2f 91 2f addr32 xor $0x2f912f91,%eax
@@ -4073,21 +4073,20 @@
16d: 3d 59 08 bb 83 cmp $0x83bb0859,%eax
172: 59 pop %rcx
173: f3 03 23 repz add (%rbx),%esp
- 176: ba 02 80 01 14 mov $0x14018002,%edx
- 17b: 02 80 01 17 02 80 add -0x7ffde8ff(%rax),%al
- 181: 01 15 02 80 02 14 add %edx,0x14028002(%rip) # 14028189 <ignore_sysret+0x14025d29>
- 187: 02 80 02 16 02 80 add -0x7ffde9fe(%rax),%al
- 18d: 01 14 02 add %edx,(%rdx,%rax,1)
- 190: 80 01 17 addb $0x17,(%rcx)
- 193: 02 80 02 17 02 80 add -0x7ffde8fe(%rax),%al
- 199: 02 17 add (%rdi),%dl
- 19b: 02 80 02 17 02 80 add -0x7ffde8fe(%rax),%al
- 1a1: 02 14 02 add (%rdx,%rax,1),%dl
- 1a4: 80 02 14 addb $0x14,(%rdx)
- 1a7: 02 80 02 16 02 80 add -0x7ffde9fe(%rax),%al
- 1ad: 02 14 02 add (%rdx,%rax,1),%dl
- 1b0: 80 02 16 addb $0x16,(%rdx)
- 1b3: 03 ef add %edi,%ebp
+ 176: ba 02 80 01 13 mov $0x13018002,%edx
+ 17b: 02 80 01 16 02 80 add -0x7ffde9ff(%rax),%al
+ 181: 01 15 02 80 02 13 add %edx,0x13028002(%rip) # 13028189 <ignore_sysret+0x13025d29>
+ 187: 02 80 02 15 02 80 add -0x7ffdeafe(%rax),%al
+ 18d: 01 13 add %edx,(%rbx)
+ 18f: 02 80 01 16 02 80 add -0x7ffde9ff(%rax),%al
+ 195: 02 16 add (%rsi),%dl
+ 197: 02 80 02 16 02 80 add -0x7ffde9fe(%rax),%al
+ 19d: 02 16 add (%rsi),%dl
+ 19f: 02 80 02 13 02 80 add -0x7ffdecfe(%rax),%al
+ 1a5: 02 13 add (%rbx),%dl
+ 1a7: 02 80 02 15 02 80 add -0x7ffdeafe(%rax),%al
+ 1ad: 02 13 add (%rbx),%dl
+ 1af: 02 80 02 15 03 ee add -0x11fceafe(%rax),%al
1b5: 00 02 add %al,(%rdx)
1b7: 80 02 01 addb $0x1,(%rdx)
1ba: 02 30 add (%rax),%dh
@@ -4108,28 +4107,30 @@
1d9: 30 13 xor %dl,(%rbx)
1db: 02 30 add (%rax),%dh
1dd: 13 02 adc (%rdx),%eax
- 1df: 2d 18 21 67 68 sub $0x68672118,%eax
+ 1df: 2d 1a 21 67 68 sub $0x6867211a,%eax
1e4: 2f (bad)
1e5: 3d 67 21 03 0f cmp $0xf032167,%eax
1ea: 74 21 je 20d <.debug_line+0x20d>
1ec: 3d 83 9f 21 59 cmp $0x59219f83,%eax
- 1f1: 21 83 03 d9 00 d6 and %eax,-0x29ff26fd(%rbx)
+ 1f1: 21 83 03 da 00 d6 and %eax,-0x29ff25fd(%rbx)
1f7: 02 80 01 16 02 80 add -0x7ffde9ff(%rax),%al
1fd: 01 13 add %edx,(%rbx)
1ff: 02 80 01 13 02 30 add 0x30021301(%rax),%al
- 205: 18 02 sbb %al,(%rdx)
+ 205: 1a 02 sbb (%rdx),%al
207: 30 13 xor %dl,(%rbx)
- 209: 02 60 14 add 0x14(%rax),%ah
+ 209: 02 60 15 add 0x15(%rax),%ah
20c: 02 30 add (%rax),%dh
- 20e: 15 03 09 02 5d adc $0x5d020903,%eax
- 213: 01 21 add %esp,(%rcx)
- 215: 02 2d 13 08 c9 59 add 0x59c90813(%rip),%ch # 59c90a2e <ignore_sysret+0x59c8e5ce>
+ 20e: 16 (bad)
+ 20f: 03 09 add (%rcx),%ecx
+ 211: 02 5d 01 add 0x1(%rbp),%bl
+ 214: 21 02 and %eax,(%rdx)
+ 216: 2d 13 08 c9 59 sub $0x59c90813,%eax
21b: 59 pop %rcx
21c: 2f (bad)
21d: 2f (bad)
21e: 2f (bad)
21f: 67 2f addr32 (bad)
- 221: 03 0f add (%rdi),%ecx
+ 221: 03 10 add (%rax),%edx
223: ba 83 e5 2f 2f mov $0x2f2fe583,%edx
228: f3 3d 30 08 92 08 repz cmp $0x8920830,%eax
22e: bb 02 2d 13 4b mov $0x4b132d02,%ebx
@@ -4155,8 +4156,7 @@
264: 2e cs
265: 5a pop %rdx
266: 5a pop %rdx
- 267: 2f (bad)
- 268: 75 5a jne 2c4 <syscall_return+0x38>
+ 267: 30 75 5a xor %dh,0x5a(%rbp)
26a: 03 09 add (%rcx),%ecx
26c: 2e 75 59 jne,pn 2c8 <syscall_return+0x3c>
26f: 2f (bad)
@@ -4169,7 +4169,7 @@
27a: 5b pop %rbx
27b: 4d 23 03 and (%r11),%r8
27e: 27 (bad)
- 27f: 66 4d 33 4f 03 data32 xor 0x3(%r15),%r9
+ 27f: 66 4d 31 4f 03 data32 xor %r9,0x3(%r15)
284: 13 08 adc (%rax),%ecx
286: 3c 93 cmp $0x93,%al
288: 4d 08 3d 52 2f 03 09 rex.WRB or %r15b,0x9032f52(%rip) # 90331e1 <ignore_sysret+0x9030d81>
@@ -4188,10 +4188,7 @@
2ae: 09 02 or %eax,(%rdx)
...
2b0: R_X86_64_64 .fixup
- 2b8: 03 cc add %esp,%ecx
- 2ba: 07 (bad)
- 2bb: 01 67 2f add %esp,0x2f(%rdi)
- 2be: 2f (bad)
+ 2b8: 03 bc 07 01 67 2f 2f add 0x2f2f6701(%rdi,%rax,1),%edi
2bf: 02 .byte 0x2
2c0: 05 .byte 0x5
2c1: 00 01 add %al,(%rcx)
--
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