Extracting prog: 2m51.876980754s
Minimizing prog: 12m13.22845832s
Simplifying prog options: 6m8.666156685s
Extracting C: 3m5.239087577s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program crashed: WARNING in blk_mq_free_tag_set
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)

program did not crash
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, 0x0)

program did not crash
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = ioctl$LOOP_CTL_GET_FREE(0xffffffffffffffff, 0x4c82)
ioctl$LOOP_CTL_REMOVE(0xffffffffffffffff, 0x4c81, r0)

program did not crash
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, 0x0, 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
extracting C reproducer
testing compiled C program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
program did not crash
simplifying guilty program options
testing program (duration=2m57.442747646s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program crashed: WARNING in blk_mq_free_tag_set
validation run: crashed=true
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program crashed: WARNING in blk_mq_free_tag_set
validation run: crashed=true
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
testing program (duration=2m57.442747646s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$LOOP_CTL_GET_FREE-ioctl$LOOP_CTL_REMOVE
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffff9c, &(0x7f0000000100), 0x0, 0x0)
r1 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r0, 0x4c81, r1)

program did not crash
validation run: crashed=false
reproducing took 54m11.854997016s
repro crashed as (corrupted=false):
------------[ cut here ]------------
timer_delete_sync(&sdp->delay_work) && rcu_segcblist_n_cbs(&sdp->srcu_cblist)
WARNING: kernel/rcu/srcutree.c:706 at cleanup_srcu_struct+0x6e4/0xb30 kernel/rcu/srcutree.c:706, CPU#0: syz.1.5882/18362
Modules linked in:
CPU: 0 UID: 0 PID: 18362 Comm: syz.1.5882 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:cleanup_srcu_struct+0x6e4/0xb30 kernel/rcu/srcutree.c:706
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 f4 03 00 00 48 8b 83 e8 00 00 00 48 8d 93 80 01 00 00 48 85 c0 0f 84 a7 fc ff ff 90 <0f> 0b 90 48 8d 8b 00 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc9000c897d80 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffffe8fefc46ee80 RCX: 0000000000000000
RDX: ffffe8fefc46f000 RSI: ffffffff81f6b0ff RDI: ffff888032e14b00
RBP: ffff88802e5a7800 R08: 0000000000000005 R09: 00000000ffffffff
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803ff7c2f0
R13: 0000000000000000 R14: ffffffff8e6b70b0 R15: ffff88803ff7c330
FS:  00007fceb98706c0(0000) GS:ffff8880d5b61000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d2b1eb840 CR3: 0000000030726000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 blk_mq_free_tag_set+0x354/0x550 block/blk-mq.c:4976
 loop_remove drivers/block/loop.c:2143 [inline]
 loop_control_remove drivers/block/loop.c:2201 [inline]
 loop_control_ioctl+0x504/0x620 drivers/block/loop.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fceb899e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fceb9870028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fceb8c25fa0 RCX: 00007fceb899e159
RDX: 0000000000000002 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007fceb8a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fceb8c26038 R14: 00007fceb8c25fa0 R15: 00007ffe80299788
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
timer_delete_sync(&sdp->delay_work) && rcu_segcblist_n_cbs(&sdp->srcu_cblist)
WARNING: kernel/rcu/srcutree.c:706 at cleanup_srcu_struct+0x6e4/0xb30 kernel/rcu/srcutree.c:706, CPU#0: syz.1.5882/18362
Modules linked in:
CPU: 0 UID: 0 PID: 18362 Comm: syz.1.5882 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:cleanup_srcu_struct+0x6e4/0xb30 kernel/rcu/srcutree.c:706
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 f4 03 00 00 48 8b 83 e8 00 00 00 48 8d 93 80 01 00 00 48 85 c0 0f 84 a7 fc ff ff 90 <0f> 0b 90 48 8d 8b 00 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc9000c897d80 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffffe8fefc46ee80 RCX: 0000000000000000
RDX: ffffe8fefc46f000 RSI: ffffffff81f6b0ff RDI: ffff888032e14b00
RBP: ffff88802e5a7800 R08: 0000000000000005 R09: 00000000ffffffff
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803ff7c2f0
R13: 0000000000000000 R14: ffffffff8e6b70b0 R15: ffff88803ff7c330
FS:  00007fceb98706c0(0000) GS:ffff8880d5b61000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d2b1eb840 CR3: 0000000030726000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 blk_mq_free_tag_set+0x354/0x550 block/blk-mq.c:4976
 loop_remove drivers/block/loop.c:2143 [inline]
 loop_control_remove drivers/block/loop.c:2201 [inline]
 loop_control_ioctl+0x504/0x620 drivers/block/loop.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fceb899e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fceb9870028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fceb8c25fa0 RCX: 00007fceb899e159
RDX: 0000000000000002 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007fceb8a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fceb8c26038 R14: 00007fceb8c25fa0 R15: 00007ffe80299788
 </TASK>