Extracting prog: 1m28.139541505s
Minimizing prog: 5m25.264406051s
Simplifying prog options: 0s
Extracting C: 21.610860979s
Simplifying C: 2m52.046112582s


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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program crashed: kernel BUG in __open_session
program crashed: kernel BUG in __open_session
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
fsconfig$FSCONFIG_SET_STRING(0xffffffffffffffff, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(0xffffffffffffffff, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(0xffffffffffffffff, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(0x0, 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, 0x0, &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', 0x0, 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, 0x0, &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', 0x0, 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
program crashed: kernel BUG in __open_session
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program crashed: kernel BUG in __open_session
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program crashed: kernel BUG in __open_session
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fsopen-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_SET_STRING-fsconfig$FSCONFIG_CMD_CREATE
detailed listing:
executing program 0:
r0 = fsopen(&(0x7f0000000000)='ceph\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000100)='source\x00', &(0x7f0000000200)='client.admin@00000000-0000-0000-0000-000000000000.ceph=/\x00', 0x0)
fsconfig$FSCONFIG_SET_STRING(r0, 0x1, &(0x7f0000000300)='mon_addr\x00', &(0x7f0000000400)='127.0.0.\x03:6789\x00', 0x0)
fsconfig$FSCONFIG_CMD_CREATE(r0, 0x6, 0x0, 0x0, 0x0)

program crashed: kernel BUG in __open_session
validation run: crashed=true
reproducing took 11m43.496240824s
repro crashed as (corrupted=false):
libceph: resolve '127.0.0.' (ret=-3): failed
------------[ cut here ]------------
kernel BUG at net/ceph/mon_client.c:211!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5921 Comm: syz.0.17 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:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 c2 ad 26 fa 89 c5 e9 2b fb ff ff e8 56 eb 7d f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 42 eb 7d f6 90 <0f> 0b e8 3a 5b f0 f6 e9 7b fa ff ff 4c 89 f7 e8 2d 5b f0 f6 e9 16
RSP: 0000:ffffc90002df7bc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880214dc290 RCX: 0000000000000000
RDX: ffff8880265fcb00 RSI: ffffffff8b8da5ae RDI: ffff8880265fcb00
RBP: ffff888021b7e8c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001f R12: 0000000000000000
R13: 00000000ffffffff R14: ffff8880214dc400 R15: ffff8880214dc298
FS:  0000000000000000(0000) GS:ffff888096a55000(0063) knlGS:0000000056794480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000032f24008 CR3: 000000004b8bb000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ceph_monc_open_session+0x46/0x60 net/ceph/mon_client.c:534
 __ceph_open_session+0x135/0x590 net/ceph/ceph_common.c:798
 ceph_real_mount fs/ceph/super.c:1173 [inline]
 ceph_get_tree+0xd98/0x1fd0 fs/ceph/super.c:1362
 vfs_get_tree+0x92/0x320 fs/super.c:1932
 vfs_cmd_create+0xd7/0x2a0 fs/fsopen.c:231
 vfs_fsconfig_locked fs/fsopen.c:295 [inline]
 __do_sys_fsconfig+0x55a/0xcb0 fs/fsopen.c:463
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f42fec
Code: Unable to access opcode bytes at 0xf7f42fc2.
RSP: 002b:00000000ffbe712c EFLAGS: 00000296 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 c2 ad 26 fa 89 c5 e9 2b fb ff ff e8 56 eb 7d f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 42 eb 7d f6 90 <0f> 0b e8 3a 5b f0 f6 e9 7b fa ff ff 4c 89 f7 e8 2d 5b f0 f6 e9 16
RSP: 0000:ffffc90002df7bc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880214dc290 RCX: 0000000000000000
RDX: ffff8880265fcb00 RSI: ffffffff8b8da5ae RDI: ffff8880265fcb00
RBP: ffff888021b7e8c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001f R12: 0000000000000000
R13: 00000000ffffffff R14: ffff8880214dc400 R15: ffff8880214dc298
FS:  0000000000000000(0000) GS:ffff888096a55000(0063) knlGS:0000000056794480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f43000 CR3: 000000004b8bb000 CR4: 0000000000352ef0

final repro crashed as (corrupted=false):
libceph: resolve '127.0.0.' (ret=-3): failed
------------[ cut here ]------------
kernel BUG at net/ceph/mon_client.c:211!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5921 Comm: syz.0.17 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:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 c2 ad 26 fa 89 c5 e9 2b fb ff ff e8 56 eb 7d f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 42 eb 7d f6 90 <0f> 0b e8 3a 5b f0 f6 e9 7b fa ff ff 4c 89 f7 e8 2d 5b f0 f6 e9 16
RSP: 0000:ffffc90002df7bc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880214dc290 RCX: 0000000000000000
RDX: ffff8880265fcb00 RSI: ffffffff8b8da5ae RDI: ffff8880265fcb00
RBP: ffff888021b7e8c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001f R12: 0000000000000000
R13: 00000000ffffffff R14: ffff8880214dc400 R15: ffff8880214dc298
FS:  0000000000000000(0000) GS:ffff888096a55000(0063) knlGS:0000000056794480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000032f24008 CR3: 000000004b8bb000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ceph_monc_open_session+0x46/0x60 net/ceph/mon_client.c:534
 __ceph_open_session+0x135/0x590 net/ceph/ceph_common.c:798
 ceph_real_mount fs/ceph/super.c:1173 [inline]
 ceph_get_tree+0xd98/0x1fd0 fs/ceph/super.c:1362
 vfs_get_tree+0x92/0x320 fs/super.c:1932
 vfs_cmd_create+0xd7/0x2a0 fs/fsopen.c:231
 vfs_fsconfig_locked fs/fsopen.c:295 [inline]
 __do_sys_fsconfig+0x55a/0xcb0 fs/fsopen.c:463
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f42fec
Code: Unable to access opcode bytes at 0xf7f42fc2.
RSP: 002b:00000000ffbe712c EFLAGS: 00000296 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 c2 ad 26 fa 89 c5 e9 2b fb ff ff e8 56 eb 7d f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 42 eb 7d f6 90 <0f> 0b e8 3a 5b f0 f6 e9 7b fa ff ff 4c 89 f7 e8 2d 5b f0 f6 e9 16
RSP: 0000:ffffc90002df7bc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880214dc290 RCX: 0000000000000000
RDX: ffff8880265fcb00 RSI: ffffffff8b8da5ae RDI: ffff8880265fcb00
RBP: ffff888021b7e8c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001f R12: 0000000000000000
R13: 00000000ffffffff R14: ffff8880214dc400 R15: ffff8880214dc298
FS:  0000000000000000(0000) GS:ffff888096a55000(0063) knlGS:0000000056794480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f43000 CR3: 000000004b8bb000 CR4: 0000000000352ef0