Extracting prog: 4m2.875250438s
Minimizing prog: 1h8m38.110606212s
Simplifying prog options: 16m55.172727229s
Extracting C: 5m9.461172586s
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: WARNING in shmem_rmdir
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(0x0, 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(0x0, 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(0x0, &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', 0x0, &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', 0x0, 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(0x0, &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', 0x0, 0x0, 0x2000, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: WARNING in shmem_rmdir
extracting C reproducer
testing compiled C program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program did not crash
testing program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: WARNING in shmem_rmdir
validation run: crashed=true
testing program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: WARNING in shmem_rmdir
validation run: crashed=true
testing program (duration=6m0s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
mkdir(&(0x7f00000000c0)='./control\x00', 0x10)
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
mount$incfs(&(0x7f0000000300)='./file0\x00', &(0x7f0000000400)='./file0\x00', &(0x7f0000000280), 0x0, 0x0)
mount$bind(&(0x7f0000000480)='./file0\x00', &(0x7f00000004c0)='./control\x00', 0x0, 0x2000, 0x0)

program crashed: WARNING in shmem_rmdir
validation run: crashed=true
reproducing took 1h46m31.757432612s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4009 at fs/inode.c:340 drop_nlink+0xce/0x110 fs/inode.c:340
Modules linked in:
CPU: 0 UID: 0 PID: 4009 Comm: syz-executor Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:drop_nlink+0xce/0x110 fs/inode.c:340
Code: 04 00 00 be 08 00 00 00 e8 cf 55 ee ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 d2 57 98 ff <0f> 0b eb 81 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 59 ff ff ff 4c
RSP: 0018:ffffc90003ec7860 EFLAGS: 00010293
RAX: ffffffff81ed532e RBX: ffff88811c3456c0 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec7888 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520007d8efc R12: dffffc0000000000
R13: 1ffff11023868ae1 R14: ffff88811c345708 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85686e56c0 CR3: 000000010c366000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 shmem_rmdir+0x5f/0x90 mm/shmem.c:3733
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:453 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x24/0x70 fs/inode.c:452
Write of size 4 at addr 0000000000000168 by task syz-executor/4009

CPU: 1 UID: 0 PID: 4009 Comm: syz-executor Tainted: G        W          6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:491
 kasan_report+0x163/0x1a0 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x299/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:453 [inline]
 ihold+0x24/0x70 fs/inode.c:452
 d_delete_notify include/linux/fsnotify.h:357 [inline]
 vfs_rmdir+0x26a/0x560 fs/namei.c:4353
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000168
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 8000000104731067 P4D 8000000104731067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 4009 Comm: syz-executor Tainted: G    B   W          6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:85 [inline]
RIP: 0010:raw_atomic_add_return include/linux/atomic/atomic-arch-fallback.h:564 [inline]
RIP: 0010:raw_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:1020 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:454 [inline]
RIP: 0010:ihold+0x2a/0x70 fs/inode.c:452
Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 4e 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 8c 4c ee ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd
RSP: 0018:ffffc90003ec78a0 EFLAGS: 00010246
RAX: ffff88811bc42600 RBX: 0000000000000000 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec78b0 R08: ffffffff88958947 R09: 1ffffffff112b128
R10: dffffc0000000000 R11: fffffbfff112b129 R12: ffff88811c3456cc
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000168 CR3: 0000000114396000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:357 [inline]
 vfs_rmdir+0x26a/0x560 fs/namei.c:4353
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
Modules linked in:
CR2: 0000000000000168
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:85 [inline]
RIP: 0010:raw_atomic_add_return include/linux/atomic/atomic-arch-fallback.h:564 [inline]
RIP: 0010:raw_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:1020 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:454 [inline]
RIP: 0010:ihold+0x2a/0x70 fs/inode.c:452
Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 4e 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 8c 4c ee ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd
RSP: 0018:ffffc90003ec78a0 EFLAGS: 00010246
RAX: ffff88811bc42600 RBX: 0000000000000000 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec78b0 R08: ffffffff88958947 R09: 1ffffffff112b128
R10: dffffc0000000000 R11: fffffbfff112b129 R12: ffff88811c3456cc
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000168 CR3: 0000000114396000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f3 0f 1e fa          	endbr64
   4:	55                   	push   %rbp
   5:	48 89 e5             	mov    %rsp,%rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 bd 4e 98 ff       	call   0xff984ed0
  13:	48 8d bb 68 01 00 00 	lea    0x168(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 8c 4c ee ff       	call   0xffee4cb0
  24:	41 be 01 00 00 00    	mov    $0x1,%r14d
* 2a:	f0 44 0f c1 b3 68 01 	lock xadd %r14d,0x168(%rbx) <-- trapping instruction
  31:	00 00
  33:	41 ff c6             	inc    %r14d
  36:	bf 02 00 00 00       	mov    $0x2,%edi
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	e8                   	.byte 0xe8
  3f:	cd                   	.byte 0xcd

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4009 at fs/inode.c:340 drop_nlink+0xce/0x110 fs/inode.c:340
Modules linked in:
CPU: 0 UID: 0 PID: 4009 Comm: syz-executor Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:drop_nlink+0xce/0x110 fs/inode.c:340
Code: 04 00 00 be 08 00 00 00 e8 cf 55 ee ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 d2 57 98 ff <0f> 0b eb 81 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 59 ff ff ff 4c
RSP: 0018:ffffc90003ec7860 EFLAGS: 00010293
RAX: ffffffff81ed532e RBX: ffff88811c3456c0 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec7888 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520007d8efc R12: dffffc0000000000
R13: 1ffff11023868ae1 R14: ffff88811c345708 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85686e56c0 CR3: 000000010c366000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 shmem_rmdir+0x5f/0x90 mm/shmem.c:3733
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:453 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x24/0x70 fs/inode.c:452
Write of size 4 at addr 0000000000000168 by task syz-executor/4009

CPU: 1 UID: 0 PID: 4009 Comm: syz-executor Tainted: G        W          6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:491
 kasan_report+0x163/0x1a0 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x299/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:453 [inline]
 ihold+0x24/0x70 fs/inode.c:452
 d_delete_notify include/linux/fsnotify.h:357 [inline]
 vfs_rmdir+0x26a/0x560 fs/namei.c:4353
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000168
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 8000000104731067 P4D 8000000104731067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 4009 Comm: syz-executor Tainted: G    B   W          6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:85 [inline]
RIP: 0010:raw_atomic_add_return include/linux/atomic/atomic-arch-fallback.h:564 [inline]
RIP: 0010:raw_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:1020 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:454 [inline]
RIP: 0010:ihold+0x2a/0x70 fs/inode.c:452
Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 4e 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 8c 4c ee ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd
RSP: 0018:ffffc90003ec78a0 EFLAGS: 00010246
RAX: ffff88811bc42600 RBX: 0000000000000000 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec78b0 R08: ffffffff88958947 R09: 1ffffffff112b128
R10: dffffc0000000000 R11: fffffbfff112b129 R12: ffff88811c3456cc
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000168 CR3: 0000000114396000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:357 [inline]
 vfs_rmdir+0x26a/0x560 fs/namei.c:4353
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5880d8df07
Code: Unable to access opcode bytes at 0x7f5880d8dedd.
RSP: 002b:00007fff7c8c63c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: 0000000000000000 RBX: 0000000000000065 RCX: 00007f5880d8df07
RDX: 0000000000000200 RSI: 00007fff7c8c7570 RDI: 00000000ffffff9c
RBP: 00007f5880e10a8d R08: 000055556fa7a54b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007fff7c8c7570
R13: 00007f5880e10a8d R14: 0000000000052bee R15: 00007fff7c8c9730
 </TASK>
Modules linked in:
CR2: 0000000000000168
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:85 [inline]
RIP: 0010:raw_atomic_add_return include/linux/atomic/atomic-arch-fallback.h:564 [inline]
RIP: 0010:raw_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:1020 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:454 [inline]
RIP: 0010:ihold+0x2a/0x70 fs/inode.c:452
Code: f3 0f 1e fa 55 48 89 e5 41 56 53 48 89 fb e8 bd 4e 98 ff 48 8d bb 68 01 00 00 be 04 00 00 00 e8 8c 4c ee ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 68 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 cd
RSP: 0018:ffffc90003ec78a0 EFLAGS: 00010246
RAX: ffff88811bc42600 RBX: 0000000000000000 RCX: ffff88811bc42600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003ec78b0 R08: ffffffff88958947 R09: 1ffffffff112b128
R10: dffffc0000000000 R11: fffffbfff112b129 R12: ffff88811c3456cc
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000168 CR3: 0000000114396000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f3 0f 1e fa          	endbr64
   4:	55                   	push   %rbp
   5:	48 89 e5             	mov    %rsp,%rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 bd 4e 98 ff       	call   0xff984ed0
  13:	48 8d bb 68 01 00 00 	lea    0x168(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 8c 4c ee ff       	call   0xffee4cb0
  24:	41 be 01 00 00 00    	mov    $0x1,%r14d
* 2a:	f0 44 0f c1 b3 68 01 	lock xadd %r14d,0x168(%rbx) <-- trapping instruction
  31:	00 00
  33:	41 ff c6             	inc    %r14d
  36:	bf 02 00 00 00       	mov    $0x2,%edi
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	e8                   	.byte 0xe8
  3f:	cd                   	.byte 0xcd