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Message-ID: <0000000000003908ec05772ec554@google.com>
Date: Mon, 01 Oct 2018 11:14:04 -0700
From: syzbot <syzbot+c61979f6f2cba5cb3c06@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
tytso@....edu
Subject: INFO: task hung in ext4_fallocate
Hello,
syzbot found the following crash on:
HEAD commit: 291d0e5d81e1 Merge tag 'for-linus-20180929' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10332181400000
kernel config: https://syzkaller.appspot.com/x/.config?x=a8212f992609a887
dashboard link: https://syzkaller.appspot.com/bug?extid=c61979f6f2cba5cb3c06
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1611fbfa400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1489f831400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c61979f6f2cba5cb3c06@...kaller.appspotmail.com
audit: type=1400 audit(1538313446.938:37): avc: denied { map } for
pid=5541 comm="syz-executor212" path="/root/syz-executor212822736"
dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
INFO: task syz-executor212:5548 blocked for more than 140 seconds.
Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D19712 5548 5545 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
schedule+0xfe/0x460 kernel/sched/core.c:3517
__rwsem_down_write_failed_common+0xbb9/0x1670
kernel/locking/rwsem-xadd.c:566
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xa5/0x130 kernel/locking/rwsem.c:72
inode_lock include/linux/fs.h:738 [inline]
ext4_fallocate+0x921/0x2300 fs/ext4/extents.c:4957
vfs_fallocate+0x4b4/0x940 fs/open.c:308
ksys_fallocate+0x56/0x90 fs/open.c:331
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0x97/0xf0 fs/open.c:337
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e
4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c
20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000217 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000010001 R11: 0000000000000217 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5550 blocked for more than 140 seconds.
Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736 5550 5543 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
schedule+0xfe/0x460 kernel/sched/core.c:3517
__rwsem_down_write_failed_common+0xbb9/0x1670
kernel/locking/rwsem-xadd.c:566
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xa5/0x130 kernel/locking/rwsem.c:72
inode_lock include/linux/fs.h:738 [inline]
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x134d/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
__do_sys_openat fs/open.c:1090 [inline]
__se_sys_openat fs/open.c:1084 [inline]
__x64_sys_openat+0x9d/0x100 fs/open.c:1084
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e
4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c
20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5551 blocked for more than 140 seconds.
Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736 5551 5546 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
schedule+0xfe/0x460 kernel/sched/core.c:3517
__rwsem_down_write_failed_common+0xbb9/0x1670
kernel/locking/rwsem-xadd.c:566
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xa5/0x130 kernel/locking/rwsem.c:72
inode_lock include/linux/fs.h:738 [inline]
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x134d/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
__do_sys_openat fs/open.c:1090 [inline]
__se_sys_openat fs/open.c:1084 [inline]
__x64_sys_openat+0x9d/0x100 fs/open.c:1084
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e
4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c
20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5552 blocked for more than 140 seconds.
Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23888 5552 5544 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
schedule+0xfe/0x460 kernel/sched/core.c:3517
__rwsem_down_write_failed_common+0xbb9/0x1670
kernel/locking/rwsem-xadd.c:566
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xa5/0x130 kernel/locking/rwsem.c:72
inode_lock include/linux/fs.h:738 [inline]
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x134d/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
__do_sys_openat fs/open.c:1090 [inline]
__se_sys_openat fs/open.c:1084 [inline]
__x64_sys_openat+0x9d/0x100 fs/open.c:1084
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e
4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c
20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor212:5553 blocked for more than 140 seconds.
Not tainted 4.19.0-rc5+ #40
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor212 D23736 5553 5542 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
schedule+0xfe/0x460 kernel/sched/core.c:3517
__rwsem_down_write_failed_common+0xbb9/0x1670
kernel/locking/rwsem-xadd.c:566
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
__down_write arch/x86/include/asm/rwsem.h:142 [inline]
down_write+0xa5/0x130 kernel/locking/rwsem.c:72
inode_lock include/linux/fs.h:738 [inline]
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
ima_file_check+0xe5/0x130 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x134d/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
__do_sys_openat fs/open.c:1090 [inline]
__se_sys_openat fs/open.c:1084 [inline]
__x64_sys_openat+0x9d/0x100 fs/open.c:1084
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e
4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c
20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65
RSP: 002b:00007ffd82484778 EFLAGS: 00000207 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000008c3880 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/983:
#0: 000000005e364832 (rcu_read_lock){....}, at:
debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435
1 lock held by rsyslogd/5383:
#0: 000000003ee63875 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200
fs/file.c:766
2 locks held by getty/5505:
#0: 0000000016366007 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000001962389b (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5506:
#0: 00000000459f06bd (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000009ba0e33f (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5507:
#0: 00000000ed059e98 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000006a8dd22c (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5508:
#0: 00000000de392f74 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000002f41f35e (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5509:
#0: 000000004b0015bd (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000fbcabc1c (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5510:
#0: 000000000749babf (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 0000000039eaad48 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/5511:
#0: 000000009592ef13 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 0000000080736cf9 (&ldata->atomic_read_lock){+.+.}, at:
n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by syz-executor212/5548:
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: file_start_write
include/linux/fs.h:2759 [inline]
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: vfs_fallocate+0x72a/0x940
fs/open.c:307
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock
include/linux/fs.h:738 [inline]
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at:
ext4_fallocate+0x921/0x2300 fs/ext4/extents.c:4957
6 locks held by syz-executor212/5549:
2 locks held by syz-executor212/5550:
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write
include/linux/fs.h:1566 [inline]
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0
fs/namespace.c:360
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock
include/linux/fs.h:738 [inline]
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at:
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5551:
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write
include/linux/fs.h:1566 [inline]
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0
fs/namespace.c:360
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock
include/linux/fs.h:738 [inline]
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at:
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5552:
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write
include/linux/fs.h:1566 [inline]
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0
fs/namespace.c:360
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock
include/linux/fs.h:738 [inline]
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at:
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
2 locks held by syz-executor212/5553:
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: sb_start_write
include/linux/fs.h:1566 [inline]
#0: 00000000dd953693 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0
fs/namespace.c:360
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at: inode_lock
include/linux/fs.h:738 [inline]
#1: 000000000a255960 (&sb->s_type->i_mutex_key#9){+.+.}, at:
process_measurement+0x190f/0x1bf0 security/integrity/ima/ima_main.c:205
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc5+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
watchdog+0xb3e/0x1050 kernel/hung_task.c:265
kthread+0x35a/0x420 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5549 Comm: syz-executor212 Not tainted 4.19.0-rc5+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:mext_check_coverage.constprop.13+0x20d/0x510
fs/ext4/move_extent.c:101
Code: 86 16 fe ff ff 4c 8d 24 40 48 b8 00 00 00 00 00 fc ff df 49 c1 e4 04
49 01 dc 49 8d 7c 24 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 36 02 00
00 48 b8 00 00 00 00 00 fc ff df 4d 8b 64 24 10 49
RSP: 0018:ffff8801b4af71c0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8801bac71600 RCX: ffffffff821e4a52
RDX: 1ffff1003758e2c2 RSI: ffffffff821e493b RDI: ffff8801bac71610
RBP: ffff8801b4af7270 R08: ffff8801c3056180 R09: 1ffffffff1273955
R10: ffffed003b5e4732 R11: ffff8801daf23993 R12: ffff8801bac71600
R13: 00000000cbb0eca5 R14: ffff8801b0f34530 R15: ffff8801b4af73e0
FS: 00000000008c3880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001c59e4000 CR4: 00000000001406e0
Call Trace:
move_extent_per_page fs/ext4/move_extent.c:323 [inline]
ext4_move_extents+0x2784/0x3c20 fs/ext4/move_extent.c:669
ext4_ioctl+0x3154/0x4210 fs/ext4/ioctl.c:799
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
__do_sys_ioctl fs/ioctl.c:709 [inline]
__se_sys_ioctl fs/ioctl.c:707 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440ef9
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd82484778 EFLAGS: 00000217 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9
RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401d90
R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this bug report. See:
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syzbot can test patches for this bug, for details see:
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