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Message-ID: <Z0ZRH-gUl59t5AHa@codewreck.org>
Date: Wed, 27 Nov 2024 07:52:15 +0900
From: asmadeus@...ewreck.org
To: David Howells <dhowells@...hat.com>
Cc: syzbot <syzbot+f86e49ba96853e315c26@...kaller.appspotmail.com>,
ericvh@...nel.org, linux-kernel@...r.kernel.org,
linux_oss@...debyte.com, lucho@...kov.net,
syzkaller-bugs@...glegroups.com, v9fs@...ts.linux.dev
Subject: Re: [syzbot] [v9fs?] BUG: stack guard page was hit in io_uring_enter
I guess it's another dup
#syz dup: [syzbot] [v9fs?] BUG: stack guard page was hit in sys_open
Leaving quote below for David
syzbot wrote on Tue, Nov 26, 2024 at 06:36:29AM -0800:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 05b92660cdfe Merge tag 'pci-v6.12-fixes-2' of git://git.ke..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=155e9630580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=728f7ffd25400452
> dashboard link: https://syzkaller.appspot.com/bug?extid=f86e49ba96853e315c26
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-05b92660.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/240ba8a2a878/vmlinux-05b92660.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/fed8acdd322e/bzImage-05b92660.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+f86e49ba96853e315c26@...kaller.appspotmail.com
>
> BUG: TASK stack guard page was hit at ffffc90001717fd8 (stack is ffffc90001718000..ffffc90001720000)
> Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI
> CPU: 3 UID: 0 PID: 8268 Comm: syz.0.692 Not tainted 6.12.0-rc5-syzkaller-00291-g05b92660cdfe #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
> RIP: 0010:unwind_next_frame+0x76/0x20c0 arch/x86/kernel/unwind_orc.c:470
> Code: 41 5f c3 cc cc cc cc 49 8d 6d 48 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 00 18 00 00 49 8b 45 48 <48> 89 44 24 08 49 8d 45 38 48 89 c2 48 89 04 24 48 b8 00 00 00 00
> RSP: 0018:ffffc90001717fe8 EFLAGS: 00010046
> RAX: ffffffff813d7404 RBX: 0000000000000001 RCX: ffffc90001718140
> RDX: 1ffff920002e301e RSI: ffff888022fc0000 RDI: ffffc900017180a8
> RBP: ffffc900017180f0 R08: 0000000000000001 R09: 0000000000000000
> R10: ffffc900017180a8 R11: 0000000000000000 R12: fffff520002e3017
> R13: ffffc900017180a8 R14: ffffc900017180a8 R15: ffffc900017180b0
> FS: 00007f483b1d36c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc90001717fd8 CR3: 000000004e7f6000 CR4: 0000000000352ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <#DF>
> </#DF>
> <TASK>
> __unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:760
> unwind_start arch/x86/include/asm/unwind.h:64 [inline]
> arch_stack_walk+0x74/0x100 arch/x86/kernel/stacktrace.c:24
> stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
> kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> unpoison_slab_object mm/kasan/common.c:319 [inline]
> __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
> kasan_slab_alloc include/linux/kasan.h:247 [inline]
> slab_post_alloc_hook mm/slub.c:4085 [inline]
> slab_alloc_node mm/slub.c:4134 [inline]
> kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141
> radix_tree_node_alloc.constprop.0+0x1e8/0x350 lib/radix-tree.c:253
> idr_get_free+0x528/0xa40 lib/radix-tree.c:1506
> idr_alloc_u32+0x191/0x2f0 lib/idr.c:46
> idr_alloc+0xc1/0x130 lib/idr.c:87
> p9_tag_alloc+0x394/0x870 net/9p/client.c:321
> p9_client_prepare_req+0x19f/0x4d0 net/9p/client.c:644
> p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
> p9_client_read_once+0x24f/0x820 net/9p/client.c:1575
> p9_client_read+0x13f/0x1b0 net/9p/client.c:1534
> v9fs_issue_read+0x115/0x310 fs/9p/vfs_addr.c:74
> netfs_retry_read_subrequests fs/netfs/read_retry.c:60 [inline]
> netfs_retry_reads+0x153a/0x1d00 fs/netfs/read_retry.c:232
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_retry_reads+0x155e/0x1d00 fs/netfs/read_retry.c:235
> netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:371
> netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:407
> netfs_dispatch_unbuffered_reads fs/netfs/direct_read.c:103 [inline]
> netfs_unbuffered_read fs/netfs/direct_read.c:127 [inline]
> netfs_unbuffered_read_iter_locked+0x12f6/0x19b0 fs/netfs/direct_read.c:221
> netfs_unbuffered_read_iter+0xc5/0x100 fs/netfs/direct_read.c:256
> v9fs_file_read_iter+0xbf/0x100 fs/9p/vfs_file.c:361
> io_iter_do_read io_uring/rw.c:771 [inline]
> __io_read+0x320/0x1190 io_uring/rw.c:865
> io_read+0x1e/0x70 io_uring/rw.c:943
> io_issue_sqe+0x175/0x13d0 io_uring/io_uring.c:1739
> io_queue_sqe io_uring/io_uring.c:1953 [inline]
> io_submit_sqe io_uring/io_uring.c:2209 [inline]
> io_submit_sqes+0x9b4/0x2530 io_uring/io_uring.c:2324
> __do_sys_io_uring_enter+0xc0f/0x1170 io_uring/io_uring.c:3343
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f483a37e719
> 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 a8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007f483b1d3038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
> RAX: ffffffffffffffda RBX: 00007f483a536058 RCX: 00007f483a37e719
> RDX: 0000000000000000 RSI: 0000000000000567 RDI: 0000000000000007
> RBP: 00007f483a3f132e R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 0000000000000000 R14: 00007f483a536058 R15: 00007ffc2e04f068
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:unwind_next_frame+0x76/0x20c0 arch/x86/kernel/unwind_orc.c:470
> Code: 41 5f c3 cc cc cc cc 49 8d 6d 48 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 00 18 00 00 49 8b 45 48 <48> 89 44 24 08 49 8d 45 38 48 89 c2 48 89 04 24 48 b8 00 00 00 00
> RSP: 0018:ffffc90001717fe8 EFLAGS: 00010046
> RAX: ffffffff813d7404 RBX: 0000000000000001 RCX: ffffc90001718140
> RDX: 1ffff920002e301e RSI: ffff888022fc0000 RDI: ffffc900017180a8
> RBP: ffffc900017180f0 R08: 0000000000000001 R09: 0000000000000000
> R10: ffffc900017180a8 R11: 0000000000000000 R12: fffff520002e3017
> R13: ffffc900017180a8 R14: ffffc900017180a8 R15: ffffc900017180b0
> FS: 00007f483b1d36c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc90001717fd8 CR3: 000000004e7f6000 CR4: 0000000000352ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> ----------------
> Code disassembly (best guess):
> 0: 41 5f pop %r15
> 2: c3 ret
> 3: cc int3
> 4: cc int3
> 5: cc int3
> 6: cc int3
> 7: 49 8d 6d 48 lea 0x48(%r13),%rbp
> b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
> 12: fc ff df
> 15: 48 89 ea mov %rbp,%rdx
> 18: 48 c1 ea 03 shr $0x3,%rdx
> 1c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
> 20: 0f 85 00 18 00 00 jne 0x1826
> 26: 49 8b 45 48 mov 0x48(%r13),%rax
> * 2a: 48 89 44 24 08 mov %rax,0x8(%rsp) <-- trapping instruction
> 2f: 49 8d 45 38 lea 0x38(%r13),%rax
> 33: 48 89 c2 mov %rax,%rdx
> 36: 48 89 04 24 mov %rax,(%rsp)
> 3a: 48 rex.W
> 3b: b8 00 00 00 00 mov $0x0,%eax
>
>
> ---
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--
Dominique Martinet | Asmadeus
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