Extracting prog: 3m32.822660668s
Minimizing prog: 8m13.367641404s
Simplifying prog options: 0s
Extracting C: 1m10.700022321s
Simplifying C: 16m44.652971375s


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:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): perf_event_open-mkdirat$cgroup_root
detailed listing:
executing program 0:
perf_event_open(&(0x7f0000000500)={0x2, 0x80, 0x42, 0x1, 0x0, 0x0, 0x0, 0xf0, 0x82, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x107b7b, 0x1, @perf_config_ext={0x407fff, 0xaea}, 0x14345, 0x2e, 0xfffffbff, 0x3, 0x2, 0x0, 0x6, 0x0, 0x0, 0x0, 0xa9e6}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x9)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f00000005c0)='./cgroup.net/syz0\x00', 0x1ff) (fail_nth: 23)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): perf_event_open-mkdirat$cgroup_root
detailed listing:
executing program 0:
perf_event_open(&(0x7f0000000500)={0x2, 0x80, 0x42, 0x1, 0x0, 0x0, 0x0, 0xf0, 0x82, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x107b7b, 0x1, @perf_config_ext={0x407fff, 0xaea}, 0x14345, 0x2e, 0xfffffbff, 0x3, 0x2, 0x0, 0x6, 0x0, 0x0, 0x0, 0xa9e6}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x9)
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f00000005c0)='./cgroup.net/syz0\x00', 0x1ff) (fail_nth: 23)

program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): perf_event_open
detailed listing:
executing program 0:
perf_event_open(&(0x7f0000000500)={0x2, 0x80, 0x42, 0x1, 0x0, 0x0, 0x0, 0xf0, 0x82, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x107b7b, 0x1, @perf_config_ext={0x407fff, 0xaea}, 0x14345, 0x2e, 0xfffffbff, 0x3, 0x2, 0x0, 0x6, 0x0, 0x0, 0x0, 0xa9e6}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x9)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f00000005c0)='./cgroup.net/syz0\x00', 0x1ff) (fail_nth: 23)

program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, &(0x7f00000005c0)='./cgroup.net/syz0\x00', 0x1ff)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
detailed listing:
executing program 0:
mkdirat$cgroup_root(0xffffffffffffff9c, 0x0, 0x1ff) (fail_nth: 23)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
simplifying C reproducer
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat$cgroup_root
program crashed: BUG: unable to handle kernel paging request in css_rstat_flush
reproducing took 29m41.543315506s
repro crashed as (corrupted=false):
BUG: unable to handle page fault for address: ffffed1011a4ca01
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 5ffcd067 P4D 5ffcd067 PUD 2fff7067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5328 Comm: kworker/0:3 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: cgroup_destroy css_free_rwork_fn
RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline]
RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413
Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01
RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802
RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440
RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660
RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e
R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590
R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008
FS:  0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 css_rstat_exit+0xa9/0x320 kernel/cgroup/rstat.c:479
 css_free_rwork_fn+0x8b/0xc50 kernel/cgroup/cgroup.c:5449
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
CR2: ffffed1011a4ca01
---[ end trace 0000000000000000 ]---
RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline]
RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413
Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01
RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802
RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440
RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660
RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e
R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590
R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008
FS:  0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 5 bytes skipped:
   0:	0f 85 e6 14 00 00    	jne    0x14ec
   6:	e8 1b 1e 07 00       	call   0x71e26
   b:	4c 03 6c 24 20       	add    0x20(%rsp),%r13
  10:	4d 8d 7d 08          	lea    0x8(%r13),%r15
  14:	4c 89 fb             	mov    %r15,%rbx
  17:	48 c1 eb 03          	shr    $0x3,%rbx
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
* 25:	80 3c 03 00          	cmpb   $0x0,(%rbx,%rax,1) <-- trapping instruction
  29:	74 08                	je     0x33
  2b:	4c 89 ff             	mov    %r15,%rdi
  2e:	e8 e3 51 6a 00       	call   0x6a5216
  33:	49 83 3f 00          	cmpq   $0x0,(%r15)
  37:	0f                   	.byte 0xf
  38:	84 5d 01             	test   %bl,0x1(%rbp)

final repro crashed as (corrupted=false):
BUG: unable to handle page fault for address: ffffed1011a4ca01
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 5ffcd067 P4D 5ffcd067 PUD 2fff7067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5328 Comm: kworker/0:3 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: cgroup_destroy css_free_rwork_fn
RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline]
RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413
Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01
RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802
RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440
RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660
RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e
R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590
R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008
FS:  0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 css_rstat_exit+0xa9/0x320 kernel/cgroup/rstat.c:479
 css_free_rwork_fn+0x8b/0xc50 kernel/cgroup/cgroup.c:5449
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
CR2: ffffed1011a4ca01
---[ end trace 0000000000000000 ]---
RIP: 0010:css_rstat_updated_list kernel/cgroup/rstat.c:284 [inline]
RIP: 0010:css_rstat_flush+0x5ff/0x1fa0 kernel/cgroup/rstat.c:413
Code: 1e 75 d1 0d 01 0f 85 e6 14 00 00 e8 1b 1e 07 00 4c 03 6c 24 20 4d 8d 7d 08 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 03 00 74 08 4c 89 ff e8 e3 51 6a 00 49 83 3f 00 0f 84 5d 01
RSP: 0018:ffffc9000d68f780 EFLAGS: 00010802
RAX: dffffc0000000000 RBX: 1ffff11011a4ca01 RCX: ffff88801f4ea440
RDX: 0000000000000000 RSI: ffffffff8be266a0 RDI: ffffffff8be26660
RBP: ffffc9000d68f9b8 R08: ffffffff8fa0aaf7 R09: 1ffffffff1f4155e
R10: dffffc0000000000 R11: fffffbfff1f4155f R12: ffff88801fc42590
R13: ffff88808d265000 R14: 0000000000000000 R15: ffff88808d265008
FS:  0000000000000000(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1011a4ca01 CR3: 0000000042fe0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 5 bytes skipped:
   0:	0f 85 e6 14 00 00    	jne    0x14ec
   6:	e8 1b 1e 07 00       	call   0x71e26
   b:	4c 03 6c 24 20       	add    0x20(%rsp),%r13
  10:	4d 8d 7d 08          	lea    0x8(%r13),%r15
  14:	4c 89 fb             	mov    %r15,%rbx
  17:	48 c1 eb 03          	shr    $0x3,%rbx
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
* 25:	80 3c 03 00          	cmpb   $0x0,(%rbx,%rax,1) <-- trapping instruction
  29:	74 08                	je     0x33
  2b:	4c 89 ff             	mov    %r15,%rdi
  2e:	e8 e3 51 6a 00       	call   0x6a5216
  33:	49 83 3f 00          	cmpq   $0x0,(%r15)
  37:	0f                   	.byte 0xf
  38:	84 5d 01             	test   %bl,0x1(%rbp)