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Message-ID: <CAFkrUshN-T1RciBE_dp_hF9DjJYQ7-YezaVYmO-GjrD2qP8YaQ@mail.gmail.com>
Date: Tue, 4 Jan 2022 17:11:48 +0800
From: kvartet <xyru1999@...il.com>
To: "Theodore Ts'o" <tytso@....edu>,
Andreas Dilger <adilger.kernel@...ger.ca>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev, syzkaller-bugs@...glegroups.com
Cc: sunhao.th@...il.com
Subject: INFO: task hung in ext4_journal_finish_inode_data_buffers
Hello,
When using Syzkaller to fuzz the latest Linux kernel, the following
crash was triggered.
HEAD commit: a7904a538933 Linux 5.16-rc6
git tree: upstream
console output: https://paste.ubuntu.com/p/5kWHmvcH97/plain/
kernel config: https://paste.ubuntu.com/p/FDDNHDxtwz/plain/
C reproducer: https://paste.ubuntu.com/p/pjQdPQHrM4/plain/
Syzlang reproducer: https://paste.ubuntu.com/p/DZRcCcQRPs/
If you fix this issue, please add the following tag to the commit:
Reported-by: Yiru Xu <xyru1999@...il.com>
INFO: task jbd2/sda-8:3027 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6 #9
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda-8 state:D stack:26288 pid: 3027 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4972 [inline]
context_switch kernel/sched/core.c:4972 [inline] kernel/sched/core.c:6253
__schedule+0xcd9/0x2530 kernel/sched/core.c:6253 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326 kernel/sched/core.c:6326
io_schedule+0xb3/0x120 kernel/sched/core.c:8371 kernel/sched/core.c:8371
folio_wait_bit_common mm/filemap.c:1371 [inline]
folio_wait_bit_common mm/filemap.c:1371 [inline] mm/filemap.c:1431
folio_wait_bit+0x1e3/0x5d0 mm/filemap.c:1431 mm/filemap.c:1431
folio_wait_writeback+0x37/0x300 mm/page-writeback.c:2925
mm/page-writeback.c:2925
__filemap_fdatawait_range+0x13b/0x420 mm/filemap.c:543 mm/filemap.c:543
filemap_fdatawait_range_keep_errors+0x21/0x30 mm/filemap.c:592 mm/filemap.c:592
ext4_journal_finish_inode_data_buffers+0x5f/0x80 fs/ext4/super.c:541
fs/ext4/super.c:541
journal_finish_inode_data_buffers fs/jbd2/commit.c:299 [inline]
journal_finish_inode_data_buffers fs/jbd2/commit.c:299 [inline]
fs/jbd2/commit.c:786
jbd2_journal_commit_transaction+0x2ba4/0x6c90 fs/jbd2/commit.c:786
fs/jbd2/commit.c:786
kjournald2+0x1d0/0x930 fs/jbd2/journal.c:213 fs/jbd2/journal.c:213
kthread+0x405/0x4f0 kernel/kthread.c:327 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
arch/x86/entry/entry_64.S:295
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/39:
#0: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at:
debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
kernel/locking/lockdep.c:6458
4 locks held by kworker/1:3/3063:
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
atomic_long_set include/linux/atomic/atomic-instrumented.h:1198
[inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
kernel/workqueue.c:2269
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
kernel/workqueue.c:2269
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
atomic_long_set include/linux/atomic/atomic-instrumented.h:1198
[inline] kernel/workqueue.c:2269
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
set_work_data kernel/workqueue.c:635 [inline] kernel/workqueue.c:2269
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
kernel/workqueue.c:2269
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at:
process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269
kernel/workqueue.c:2269
#1: ffffc900012efdc8
((work_completion)(&ap->scsi_rescan_task)){+.+.}-{0:0}, at:
process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273
kernel/workqueue.c:2273
#2: ffff88801a83c2a0 (&ap->scsi_scan_mutex){+.+.}-{3:3}, at:
ata_scsi_dev_rescan+0x38/0x230 drivers/ata/libata-scsi.c:4646
drivers/ata/libata-scsi.c:4646
#3: ffff8881075a23e0 (&dev->mutex){....}-{3:3}, at: device_lock
include/linux/device.h:760 [inline]
#3: ffff8881075a23e0 (&dev->mutex){....}-{3:3}, at: device_lock
include/linux/device.h:760 [inline] drivers/scsi/scsi_scan.c:1555
#3: ffff8881075a23e0 (&dev->mutex){....}-{3:3}, at:
scsi_rescan_device+0x28/0x210 drivers/scsi/scsi_scan.c:1555
drivers/scsi/scsi_scan.c:1555
1 lock held by in:imklog/6744:
4 locks held by kworker/u9:2/6762:
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
atomic_long_set include/linux/atomic/atomic-instrumented.h:1198
[inline]
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
kernel/workqueue.c:2269
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
kernel/workqueue.c:2269
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
atomic_long_set include/linux/atomic/atomic-instrumented.h:1198
[inline] kernel/workqueue.c:2269
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
set_work_data kernel/workqueue.c:635 [inline] kernel/workqueue.c:2269
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
kernel/workqueue.c:2269
#0: ffff888100b90138 ((wq_completion)writeback){+.+.}-{0:0}, at:
process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269
kernel/workqueue.c:2269
#1: ffffc90001c1fdc8
((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at:
process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273
kernel/workqueue.c:2273
#2: ffff88810b1740e0 (&type->s_umount_key#36){++++}-{3:3}, at:
trylock_super+0x1d/0x100 fs/super.c:418 fs/super.c:418
#3: ffff88810b176bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at:
do_writepages+0x19b/0x610 mm/page-writeback.c:2364
mm/page-writeback.c:2364
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 39 Comm: khungtaskd Not tainted 5.16.0-rc6 #9
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
__dump_stack lib/dump_stack.c:88 [inline] lib/dump_stack.c:106
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1a1/0x1e0 lib/nmi_backtrace.c:62
lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
kernel/hung_task.c:295
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
kernel/hung_task.c:295
watchdog+0xcc8/0x1010 kernel/hung_task.c:295 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0,2-3:
NMI backtrace for cpu 3
CPU: 3 PID: 3050 Comm: systemd-journal Not tainted 5.16.0-rc6 #9
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
RIP: 0010:test_bit
include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
kernel/locking/lockdep.c:4583
RIP: 0010:test_bit
include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
kernel/locking/lockdep.c:4583
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
kernel/locking/lockdep.c:4583
RIP: 0010:mark_lock.part.0+0xfc/0x27c0 kernel/locking/lockdep.c:4583
kernel/locking/lockdep.c:4583
Code: b7 54 24 20 66 81 e2 ff 1f 0f b7 d2 be 08 00 00 00 48 89 d0 48
89 54 24 38 48 c1 f8 06 48 8d 3c c5 40 09 f7 8f e8 34 40 62 00 <48> 8b
54 24 38 48 0f a3 15 77 1e 9b 0e 0f 83 c8 00 00 00 48 8d 04
RSP: 0018:ffffc9000126f920 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff9200024df2c RCX: ffffffff815beabc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ff70950
RBP: ffffc9000126fa88 R08: 0000000000000001 R09: fffffbfff1fee12b
R10: ffffffff8ff70957 R11: fffffbfff1fee12a R12: ffff888106d226e0
R13: 0000000000000040 R14: 0000000000000006 R15: ffff888106d22700
FS: 00007fcf3a5dd8c0(0000) GS:ffff888135d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf37926000 CR3: 0000000017de1000 CR4: 0000000000350ee0
Call Trace:
<TASK>
mark_lock kernel/locking/lockdep.c:4569 [inline]
mark_usage kernel/locking/lockdep.c:4518 [inline]
mark_lock kernel/locking/lockdep.c:4569 [inline] kernel/locking/lockdep.c:4981
mark_usage kernel/locking/lockdep.c:4518 [inline] kernel/locking/lockdep.c:4981
__lock_acquire+0x8c9/0x57e0 kernel/locking/lockdep.c:4981
kernel/locking/lockdep.c:4981
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire kernel/locking/lockdep.c:5637 [inline]
kernel/locking/lockdep.c:5602
lock_acquire+0x1ab/0x520 kernel/locking/lockdep.c:5602
kernel/locking/lockdep.c:5602
__fs_reclaim_acquire mm/page_alloc.c:4535 [inline]
__fs_reclaim_acquire mm/page_alloc.c:4535 [inline] mm/page_alloc.c:4549
fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4549 mm/page_alloc.c:4549
might_alloc include/linux/sched/mm.h:227 [inline]
slab_pre_alloc_hook mm/slab.h:492 [inline]
slab_alloc_node mm/slub.c:3148 [inline]
slab_alloc mm/slub.c:3242 [inline]
might_alloc include/linux/sched/mm.h:227 [inline] mm/slub.c:3247
slab_pre_alloc_hook mm/slab.h:492 [inline] mm/slub.c:3247
slab_alloc_node mm/slub.c:3148 [inline] mm/slub.c:3247
slab_alloc mm/slub.c:3242 [inline] mm/slub.c:3247
kmem_cache_alloc+0x3e/0x380 mm/slub.c:3247 mm/slub.c:3247
getname_flags fs/namei.c:138 [inline]
getname_flags fs/namei.c:138 [inline] fs/namei.c:128
getname_flags+0xd2/0x5b0 fs/namei.c:128 fs/namei.c:128
do_sys_openat2+0x448/0x9a0 fs/open.c:1206 fs/open.c:1206
do_sys_open+0xc3/0x140 fs/open.c:1228 fs/open.c:1228
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fcf39b6d840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66
0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d
01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007fff8229bca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fff8229bfb0 RCX: 00007fcf39b6d840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055bc132b8300
RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055bc132b4040 R14: 00007fff8229bf70 R15: 000055bc132bfe10
</TASK>
NMI backtrace for cpu 0 skipped: idling at native_safe_halt
arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt
arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at native_safe_halt
arch/x86/include/asm/irqflags.h:51 [inline]
arch/x86/kernel/process.c:733
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt
arch/x86/include/asm/irqflags.h:89 [inline]
arch/x86/kernel/process.c:733
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10
arch/x86/kernel/process.c:733 arch/x86/kernel/process.c:733
NMI backtrace for cpu 2
CPU: 2 PID: 6745 Comm: rs:main Q:Reg Not tainted 5.16.0-rc6 #9
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:kasan_set_free_info+0x9/0x30 mm/kasan/generic.c:367
mm/kasan/generic.c:367
Code: 00 be 01 00 00 00 e9 d6 fc ff ff 66 0f 1f 44 00 00 31 f6 e9 c9
fc ff ff 66 0f 1f 84 00 00 00 00 00 53 48 89 f3 e8 d7 e3 ff ff <48> 85
c0 74 20 48 8d 78 08 be 00 08 00 00 48 c1 eb 03 e8 70 e1 ff
RSP: 0018:ffffc900013cf7d8 EFLAGS: 00000293
RAX: ffff888014e45268 RBX: ffff888014e45268 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888014e45268 RDI: ffff8880161872c0
RBP: ffff888014e45268 R08: 0000000000000058 R09: ffffed10029c8a4d
R10: 0000000000000007 R11: fffffbfff1fee13b R12: ffff8880161872c0
R13: ffffffff82263856 R14: ffffffff82263856 R15: 0000000000000000
FS: 00007f178f952700(0000) GS:ffff888063f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf37920010 CR3: 0000000020054000 CR4: 0000000000350ee0
Call Trace:
<TASK>
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
____kasan_slab_free mm/kasan/common.c:366 [inline] mm/kasan/common.c:374
____kasan_slab_free mm/kasan/common.c:328 [inline] mm/kasan/common.c:374
__kasan_slab_free+0x100/0x140 mm/kasan/common.c:374 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook mm/slub.c:1749 [inline]
slab_free mm/slub.c:3513 [inline]
kasan_slab_free include/linux/kasan.h:235 [inline] mm/slub.c:3530
slab_free_hook mm/slub.c:1723 [inline] mm/slub.c:3530
slab_free_freelist_hook mm/slub.c:1749 [inline] mm/slub.c:3530
slab_free mm/slub.c:3513 [inline] mm/slub.c:3530
kmem_cache_free+0xdc/0x440 mm/slub.c:3530 mm/slub.c:3530
jbd2_free_handle include/linux/jbd2.h:1608 [inline]
jbd2_free_handle include/linux/jbd2.h:1608 [inline] fs/jbd2/transaction.c:1937
jbd2_journal_stop+0x656/0xf20 fs/jbd2/transaction.c:1937
fs/jbd2/transaction.c:1937
__ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:127 fs/ext4/ext4_jbd2.c:127
ext4_dirty_inode+0xe8/0x110 fs/ext4/inode.c:5920 fs/ext4/inode.c:5920
__mark_inode_dirty+0x53d/0xfe0 fs/fs-writeback.c:2399 fs/fs-writeback.c:2399
mark_inode_dirty include/linux/fs.h:2451 [inline]
mark_inode_dirty include/linux/fs.h:2451 [inline] fs/buffer.c:2202
generic_write_end+0x2fd/0x3e0 fs/buffer.c:2202 fs/buffer.c:2202
ext4_da_write_end+0x1c2/0x9d0 fs/ext4/inode.c:3059 fs/ext4/inode.c:3059
generic_perform_write+0x2c4/0x510 mm/filemap.c:3765 mm/filemap.c:3765
ext4_buffered_write_iter+0x170/0x360 fs/ext4/file.c:269 fs/ext4/file.c:269
ext4_file_write_iter+0x42e/0x14a0 fs/ext4/file.c:681 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
call_write_iter include/linux/fs.h:2162 [inline] fs/read_write.c:503
new_sync_write+0x432/0x660 fs/read_write.c:503 fs/read_write.c:503
vfs_write+0x678/0xae0 fs/read_write.c:590 fs/read_write.c:590
ksys_write+0x12d/0x250 fs/read_write.c:643 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f17923961cd
Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31
c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b
3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f178f951590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f178400d6e0 RCX: 00007f17923961cd
RDX: 00000000000008d8 RSI: 00007f178400d6e0 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f17914efd57
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f178400d460
R13: 00007f178f9515b0 R14: 00005571eb1657c0 R15: 00000000000008d8
</TASK>
----------------
Code disassembly (best guess):
0: b7 54 mov $0x54,%bh
2: 24 20 and $0x20,%al
4: 66 81 e2 ff 1f and $0x1fff,%dx
9: 0f b7 d2 movzwl %dx,%edx
c: be 08 00 00 00 mov $0x8,%esi
11: 48 89 d0 mov %rdx,%rax
14: 48 89 54 24 38 mov %rdx,0x38(%rsp)
19: 48 c1 f8 06 sar $0x6,%rax
1d: 48 8d 3c c5 40 09 f7 lea -0x7008f6c0(,%rax,8),%rdi
24: 8f
25: e8 34 40 62 00 callq 0x62405e
* 2a: 48 8b 54 24 38 mov 0x38(%rsp),%rdx <-- trapping instruction
2f: 48 0f a3 15 77 1e 9b bt %rdx,0xe9b1e77(%rip) # 0xe9b1eae
36: 0e
37: 0f 83 c8 00 00 00 jae 0x105
3d: 48 rex.W
3e: 8d .byte 0x8d
3f: 04 .byte 0x4
----------------
Code disassembly (best guess):
0: b7 54 mov $0x54,%bh
2: 24 20 and $0x20,%al
4: 66 81 e2 ff 1f and $0x1fff,%dx
9: 0f b7 d2 movzwl %dx,%edx
c: be 08 00 00 00 mov $0x8,%esi
11: 48 89 d0 mov %rdx,%rax
14: 48 89 54 24 38 mov %rdx,0x38(%rsp)
19: 48 c1 f8 06 sar $0x6,%rax
1d: 48 8d 3c c5 40 09 f7 lea -0x7008f6c0(,%rax,8),%rdi
24: 8f
25: e8 34 40 62 00 callq 0x62405e
* 2a: 48 8b 54 24 38 mov 0x38(%rsp),%rdx <-- trapping instruction
2f: 48 0f a3 15 77 1e 9b bt %rdx,0xe9b1e77(%rip) # 0xe9b1eae
36: 0e
37: 0f 83 c8 00 00 00 jae 0x105
3d: 48 rex.W
3e: 8d .byte 0x8d
3f: 04 .byte 0x4
Best Regards,
Yiru
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