syzbot


panic: sleeping thread[ htholredsa d tpuin_dm 2tx ti

Status: upstream: reported on 2025/07/26 00:33
Reported-by: syzbot+2b55adf68bb7d748f15e@syzkaller.appspotmail.com
First crash: 11d, last: 11d

Sample crash report:
panic: sleeping thread[  htholredsa d tpuin_dm 2tx ti
dc pu10id00 =3 01
 ]tim
Seto p=p e1d7 a53t489967
KDB: stack backtrace:
      sdbmp__trrenacdeez_sveoluf_sw_aracptpioenr(+0) x a5tddb_trace_self_wrappe:r +  0 xc 6 /  f  r a me   0 x f f f f  fe  00  56 a  7 c9  b0  
 cmpl    0x25ab56d(%rip),%eax
db> 
db> kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056a7cb10
vpanic() at vpanic+0x257/frame 0xfffffe0056a7ccd0
panic() at panic+0xb5/frame 0xfffffe0056a7cd90
propagate_priority() at propagate_priority+0x521/frame 0xfffffe0056a7cde0
turnstile_wait() at turnstile_wait+0x663/frame 0xfffffe0056a7ce50
__mtx_lock_sleep() at __mtx_lock_sleep+0x452/frame 0xfffffe0056a7cf90
__mtx_lock_flags() at __mtx_lock_flags+0x1fe/frame 0xfffffe0056a7d080
tunstart_l2() at tunstart_l2+0x74/frame 0xfffffe0056a7d0e0
tap_transmit() at tap_transmit+0x1d0/frame 0xfffffe0056a7d130
ether_output_frame() at ether_output_frame+0x30c/frame 0xfffffe0056a7d1f0
ether_output() at ether_output+0x114b/frame 0xfffffe0056a7d360
ip6_output_send() at ip6_output_send+0x1b6/frame 0xfffffe0056a7d3e0
set $lines = 0
db> ip6_output() at ip6_output+0x484b/frame 0xfffffe0056a7d930
mld_dispatch_packet() at mld_dispatch_packet+0x8d1/frame 0xfffffe0056a7da90
mld_fasttimo() at mld_fasttimo+0x1900/frame 0xfffffe0056a7dcd0
softclock_call_cc() at softclock_call_cc+0x422/frame 0xfffffe0056a7de80
softclock_thread() at softclock_thread+0x200/frame 0xfffffe0056a7def0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056a7df30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056a7df30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
Uptime: 44s
Automatic reboot in 15 seconds - press a key on the console to abort
set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                        0x1
rcx         0xfffffe0073600000
rdx                    0x7ffff
rbx                        0x1
rsp         0xfffffe0056dbe570
rbp         0xfffffe0056dbe5b0
rsi                    0x80001
rdi         0xffffffff8162d265  smp_rendezvous_action+0x55
r8                           0
r9                         0x1
r10                          0
r11                      0x1ff
r12                        0x2
r13                          0
r14                        0x2
r15                        0x1
rip         0xffffffff8162d26d  smp_rendezvous_action+0x5d
rflags                     0x2
smp_rendezvous_action+0x5d:     cmpl    0x25ab56d(%rip),%eax
db> show proc
Process 2 (clock) at 0xfffffe0007808020:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff83b4d000
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff83b4d000 reapsubtree: 2
 sigparent: 20
 vmspace: 0xffffffff83b4dfe0
   (map 0xffffffff83b4dfe0)
   (map.pmap 0xffffffff83b4e080)
   (pmap 0xffffffff83b4e0f0)
 threads: 2
100031                   L      *tun_mtx 0xfffffe00079f9c00  [clock (0)]
100032                   I                                   [clock (1)]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  837   835   765     0  N                                   syz-executor
  836   835   765     0  S       uwait   0xfffffe000776cc80  syz-executor
  835   765   765     0  RL      (threaded)                  syz-executor
100113                   RunQ                                syz-executor
100153                   Run     CPU 1                       syz-executor
  834   764   764     0  R       (threaded)                  syz-executor
100126                   RunQ                                syz-executor
100151                   RunQ                                syz-executor
100154                   S       uwait   0xfffffe006e55ea00  syz-executor
  832     1   764     0  S       uwait   0xfffffe000776c480  syz-executor
  829     0     0     0  DL      mdwait  0xfffffe006b750000  [md0]
  827     0     0     0  DL      aiordy  0xfffffe005410c580  [aiod4]
  826     0     0     0  DL      aiordy  0xfffffe005410cae0  [aiod3]
  825     0     0     0  DL      aiordy  0xfffffe005410d040  [aiod2]
  824     0     0     0  DL      aiordy  0xfffffe005410d5a0  [aiod1]
  821     0     0     0  DL      mdwait  0xfffffe006b751000  [md2147483646]
  819   818   423     0  L      *tun_mtx 0xfffffe00079f9c00  ifconfig
  818   811   423     0  S       wait    0xfffffe00540f3b00  sh
  817     1   817     0  Ss      select  0xfffffe00077e58c0  dhclient
  816     0     0     0  DL      (threaded)                  [so_splice]
100128                   D       -       0xfffffe000778cc00  [thr_0]
100129                   D       -       0xfffffe000778cc40  [thr_1]
  813   763   763     0  T       (threaded)                  syz-executor
100115                   s                                   syz-executor
100125                   D       tun_ioc 0xffffffff83cc3940  syz-executor
  811   791   423     0  S       wait    0xfffffe00540f45c0  dhclient
  805     1   765     0  S       uwait   0xfffffe000776c380  syz-executor
  791   423   423     0  S       wait    0xfffffe00540dc060  sh
  766   762   766     0  R                                   syz-executor
  765   762   765     0  S       nanslp  0xffffffff83ba3c81  syz-executor
  764   762   764     0  S       nanslp  0xffffffff83ba3c81  syz-executor
  763   762   763     0  S       nanslp  0xffffffff83ba3c81  syz-executor
  762   760   760     0  R                                   syz-executor
  760   758   760     0  Ss      sigsusp 0xfffffe00540040f0  csh
  758   681   758     0  Ss      select  0xfffffe00077e56c0  sshd
  747     1   747     0  Ss+     ttyin   0xfffffe00582798b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe00594d44b0  getty
  745     1   745     0  Ss+     ttyin   0xfffffe00594d4cb0  getty
  744     1   744     0  Ss+     ttyin   0xfffffe00594d54b0  getty
  743     1   743     0  Ss+     ttyin   0xfffffe00594d5cb0  getty
  742     1   742     0  Ss+     ttyin   0xfffffe0053f694b0  getty
  741     1   741     0  Ss+     ttyin   0xfffffe0053f69cb0  getty
  740     1   740     0  Ss+     ttyin   0xfffffe0053f6b4b0  getty
  739     1   739     0  Ss+     ttyin   0xfffffe0053f6bcb0  getty
  737     1    17     0  S+      piperd  0xfffffe006b43a9e0  logger
  736   735    17     0  S+      nanslp  0xffffffff83ba3c80  sleep
  735     1    17     0  S+      wait    0xfffffe00540d9560  sh
  685     1   685     0  Ss      nanslp  0xffffffff83ba3c81  cron
  681     1   681     0  Ss      select  0xfffffe0058649dc0  sshd
  494     1   494     0  Ss      select  0xfffffe00586499c0  syslogd
  423     1   423     0  Ss      wait    0xfffffe00540a9580  devd
  422     1   422    65  Ss      select  0xfffffe0058649ac0  dhclient
  337     1   337     0  Ss      select  0xfffffe00077e5e40  dhclient
  334     1   334     0  Ss      select  0xfffffe00077e5cc0  dhclient
   16     0     0     0  DL      syncer  0xffffffff83cc1720  [syncer]
   15     0     0     0  DL      vlruwt  0xfffffe000780a060  [vnlru]
   14     0     0     0  DL      (threaded)                  [bufdaemon]
100079                   D       psleep  0xffffffff83cbfc60  [bufdaemon]
100082                   D       -       0xffffffff83001ec0  [bufspacedaemon-0]
100094                   D       sdflush 0xfffffe00596efce8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83d0abc0  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100077                   D       psleep  0xffffffff83cf0c88  [dom0]
100080                   D       launds  0xffffffff83cf0c94  [laundry: dom0]
100081                   D       umarcl  0xffffffff81ddfb90  [uma]
    7     0     0     0  DL      -       0xffffffff8391c5d8  [rand_harvestq]
    6     0     0     0  DL      pftm    0xffffffff8463d9e0  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff848fc700  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100045                   D       -       0xffffffff838e6340  [doneq0]
100046                   D       -       0xffffffff838e62c0  [async]
100075                   D       -       0xffffffff838e6140  [scanner]
    3     0     0     0  DL      (threaded)                  [crypto]
100042                   D       crypto_ 0xffffffff83cec540  [crypto]
100043                   D       crypto_ 0xfffffe0053eb5a30  [crypto returns 0]
100044                   D       crypto_ 0xfffffe0053eb5a80  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100037                   D       -       0xffffffff83b4c620  [g_event]
100038                   D       -       0xffffffff83b4c640  [g_up]
100039                   D       -       0xffffffff83b4c660  [g_down]
    2     0     0     0  LL      (threaded)                  [clock]
100031                   L      *tun_mtx 0xfffffe00079f9c00  [clock (0)]
100032                   I                                   [clock (1)]
   12     0     0     0  WL      (threaded)                  [intr]
100013                   I                                   [swi6: task queue]
100014                   I                                   [swi6: Giant taskq]
100016                   I                                   [swi5: fast taskq]
100033                   I                                   [swi1: netisr 0]
100034                   I                                   [swi1: hpts]
100035                   I                                   [swi1: hpts]
100047                   I                                   [irq24: virtio_pci0]
100048                   I                                   [irq25: virtio_pci0]
100049                   I                                   [irq26: virtio_pci0]
100050                   I                                   [irq27: virtio_pci0]
100051                   I                                   [irq28: virtio_pci1]
100052                   I                                   [irq29: virtio_pci1]
100053                   I                                   [irq30: virtio_pci1]
100054                   I                                   [irq31: virtio_pci1]
100055                   I                                   [irq32: virtio_pci1]
100060                   I                                   [irq10: virtio_pci2]
100062                   I                                   [irq1: atkbd0]
100063                   I                                   [irq12: psm0]
100064                   I                                   [swi0: uart uart++]
100068                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0007809040  [init]
   10     0     0     0  DL      audit_w 0xffffffff83cecfe0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       parked  0xffffffff84c3dff0  [swapper]
100005                   D       -       0xfffffe0053eb6100  [softirq_0]
100006                   D       -       0xfffffe0053eb6000  [softirq_1]
100007                   D       -       0xfffffe0053eb5e00  [if_io_tqg_0]
100008                   D       -       0xfffffe0053eb5d00  [if_io_tqg_1]
100009                   D       -       0xfffffe0053eb5c00  [if_config_tqg_0]
100010                   D       -       0xfffffe00083f7d00  [kqueue_ctx taskq]
100011                   D       -       0xfffffe00083f7c00  [jail_remove taskq]
100012                   D       -       0xfffffe00083f7b00  [bus taskq]
100015                   D       -       0xfffffe00083f7800  [thread taskq]
100017                   D       -       0xfffffe00083f7600  [aiod_kick taskq]
100018                   D       -       0xfffffe00083f7500  [deferred_unmount ta]
100019                   D       -       0xfffffe00083f7400  [inm_free taskq]
100020                   D       -       0xfffffe00083f7300  [in6m_free taskq]
100021                   D       -       0xfffffe00083f7200  [linuxkpi_irq_wq]
100022                   D       -       0xfffffe00083f7100  [linuxkpi_short_wq_0]
100023                   D       -       0xfffffe00083f7100  [linuxkpi_short_wq_1]
100024                   D       -       0xfffffe00083f7100  [linuxkpi_short_wq_2]
100025                   D       -       0xfffffe00083f7100  [linuxkpi_short_wq_3]
100026                   D       -       0xfffffe00083f7000  [linuxkpi_long_wq_0]
100027                   D       -       0xfffffe00083f7000  [linuxkpi_long_wq_1]
100028                   D       -       0xfffffe00083f7000  [linuxkpi_long_wq_2]
100029                   D       -       0xfffffe00083f7000  [linuxkpi_long_wq_3]
100036                   D       -       0xfffffe00083f6e00  [firmware taskq]
100040                   D       -       0xfffffe00083f6b00  [crypto_0]
100041                   D       -       0xfffffe00083f6b00  [crypto_1]
100056                   D       -       0xfffffe00083f6900  [vtnet0 rxq 0]
100057                   D       -       0xfffffe00083f6800  [vtnet0 txq 0]
100058                   D       -       0xfffffe00083f6700  [vtnet0 rxq 1]
100059                   D       -       0xfffffe00083f6600  [vtnet0 txq 1]
100061                   D       vtbslp  0xfffffe0057d7d700  [virtio_balloon]
100065                   D       -       0xffffffff827ceee0  [deadlkres]
100069                   D       -       0xfffffe005857c600  [acpi_task_0]
100070                   D       -       0xfffffe005857c600  [acpi_task_1]
100071                   D       -       0xfffffe005857c600  [acpi_task_2]
100073                   D       -       0xfffffe00083f8100  [mca taskq]
100074                   D       -       0xfffffe00083f6a00  [CAM taskq]
100076                   D       -       0xfffffe005857c400  [ipsec_offload]
db> show all locks
Process 835 (syz-executor) thread 0xfffffe0054113000 (100153)
exclusive sleep mutex descriptor tables (descriptor tables) r = 0 (0xffffffff83d27940) locked @ /syzkaller/managers/i386/kernel/sys/amd64/amd64/sys_machdep.c:551
shared sx killpg racer (killpg racer) r = 0 (0xfffffe00540a7760) locked @ /syzkaller/managers/i386/kernel/sys/kern/kern_fork.c:959
Process 819 (ifconfig) thread 0xfffffe00540a0000 (100114)
exclusive sx tun_ioctl (tun_ioctl) r = 0 (0xffffffff83cc3940) locked @ /syzkaller/managers/i386/kernel/sys/net/if_tuntap.c:1300
exclusive sx in_control (in_control) r = 0 (0xffffffff83cc6540) locked @ /syzkaller/managers/i386/kernel/sys/netinet/in.c:367
Process 813 (syz-executor) thread 0xfffffe005409e780 (100125)
exclusive sleep mutex tun_mtx (tun_mtx) r = 0 (0xfffffe006ddece08) locked @ /syzkaller/managers/i386/kernel/sys/net/if_tuntap.c:1601
Process 2 (clock) thread 0xfffffe000781a780 (100031)
exclusive sleep mutex mld_mtx (mld_mtx) r = 0 (0xffffffff83ce7c60) locked @ /syzkaller/managers/i386/kernel/sys/netinet6/mld6.c:1349
exclusive sleep mutex in6_multi_list_mtx (in6_multi_list_mtx) r = 0 (0xffffffff83ce7a80) locked @ /syzkaller/managers/i386/kernel/sys/netinet6/mld6.c:1348
shared rw vnet_rwlock (vnet_rwlock) r = 0 (0xffffffff83cc5cc0) locked @ /syzkaller/managers/i386/kernel/sys/netinet6/mld6.c:1307
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            6        12804K            6
            linker          376         5079K          502
          tcp_hpts            7         4801K            7
            devbuf         4187         4323K         4214
         sysctloid        35008         2062K        35083
             vtbuf          panic: Assertion curthread->td_pinned > 0 failed at /syzkaller/managers/i386/kernel/sys/sys/sched.h:192
cpuid = 0
time = 1753489967
KDB: stack backtrace:
           db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xffffffff83d22bd0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xffffffff83d22d30
vpanic() at vpanic+0x257/frame 0xffffffff83d22ef0
panic() at panic+0xb5/frame 0xffffffff83d22fc0
DELAY() at DELAY+0x279/frame 0xffffffff83d23010
ns8250_putc() at ns8250_putc+0x172/frame 0xffffffff83d23070
uart_cnputc() at uart_cnputc+0xab/frame 0xffffffff83d230b0
cnputc() at cnputc+0x130/frame 0xffffffff83d230e0
db_putc() at db_putc+0x159/frame 0xffffffff83d23110
kvprintf() at kvprintf+0x1eda/frame 0xffffffff83d232d0
db_printf() at db_printf+0x125/frame 0xffffffff83d23420
db_show_malloc() at db_show_malloc+0x54e/frame 0xffffffff83d234b0
db_command() at db_command+0x5fc/frame 0xffffffff83d23650
db_command_loop() at db_command_loop+0x82/frame 0xffffffff83d23670
db_trap() at db_trap+0x27b/frame 0xffffffff83d237b0
kdb_trap() at kdb_trap+0x66c/frame 0xffffffff83d23970
nmi_call_kdb() at nmi_call_kdb+0x132/frame 0xffffffff83d239b0
nmi_call_kdb_smp() at nmi_call_kdb_smp+0x5f/frame 0xffffffff83d239f0
trap() at trap+0x232/frame 0xffffffff83d23be0
nmi_calltrap() at nmi_calltrap+0x8/frame 0xffffffff83d23be0
--- trap 0x13, rip = 0xffffffff8162d26d, rsp = 0xfffffe0056dbe570, rbp = 0xfffffe0056dbe5b0 ---
smp_rendezvous_action() at smp_rendezvous_action+0x5d/frame 0xfffffe0056dbe5b0
smp_rendezvous_cpus() at smp_rendezvous_cpus+0x2e7/frame 0xfffffe0056dbe7a0
smp_rendezvous() at smp_rendezvous+0x46/frame 0xfffffe0056dbe850
user_ldt_alloc() at user_ldt_alloc+0x3d0/frame 0xfffffe0056dbe950
cpu_fork() at cpu_fork+0x26a/frame 0xfffffe0056dbe9b0
vm_forkproc() at vm_forkproc+0x225/frame 0xfffffe0056dbea10
do_fork() at do_fork+0x1980/frame 0xfffffe0056dbeaf0
fork1() at fork1+0xd58/frame 0xfffffe0056dbec10
sys_fork() at sys_fork+0xe3/frame 0xfffffe0056dbed10
ia32_syscall() at ia32_syscall+0x4d2/frame 0xfffffe0056dbef30
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xdfffcf98
panic: Assertion kstack_contains(td, (vm_offset_t)et, sizeof(*et)) failed at /syzkaller/managers/i386/kernel/sys/kern/subr_epoch.c:470
cpuid = 0
time = 1753489967
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xffffffff83d22750
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xffffffff83d228b0
vpanic() at vpanic+0x257/frame 0xffffffff83d22a70
panic() at panic+0xb5/frame 0xffffffff83d22b30
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d22b70
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d22c70
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d22d30
vpanic() at vpanic+0x338/frame 0xffffffff83d22ef0
panic() at panic+0xb5/frame 0xffffffff83d22fc0
DELAY() at DELAY+0x279/frame 0xffffffff83d23010
ns8250_putc() at ns8250_putc+0x172/frame 0xffffffff83d23070
uart_cnputc() at uart_cnputc+0xab/frame 0xffffffff83d230b0
cnputc() at cnputc+0x130/frame 0xffffffff83d230e0
db_putc() at db_putc+0x159/frame 0xffffffff83d23110
kvprintf() at kvprintf+0x1eda/frame 0xffffffff83d232d0
db_printf() at db_printf+0x125/frame 0xffffffff83d23420
db_show_malloc() at db_show_malloc+0x54e/frame 0xffffffff83d234b0
db_command() at db_command+0x5fc/frame 0xffffffff83d23650
db_command_loop() at db_command_loop+0x82/frame 0xffffffff83d23670
db_trap() at db_trap+0x27b/frame 0xffffffff83d237b0
kdb_trap() at kdb_trap+0x66c/frame 0xffffffff83d23970
nmi_call_kdb() at nmi_call_kdb+0x132/frame 0xffffffff83d239b0
nmi_call_kdb_smp() at nmi_call_kdb_smp+0x5f/frame 0xffffffff83d239f0
trap() at trap+0x232/frame 0xffffffff83d23be0
nmi_calltrap() at nmi_calltrap+0x8/frame 0xffffffff83d23be0
--- trap 0x13, rip = 0xffffffff8162d26d, rsp = 0xfffffe0056dbe570, rbp = 0xfffffe0056dbe5b0 ---
smp_rendezvous_action() at smp_rendezvous_action+0x5d/frame 0xfffffe0056dbe5b0
smp_rendezvous_cpus() at smp_rendezvous_cpus+0x2e7/frame 0xfffffe0056dbe7a0
smp_rendezvous() at smp_rendezvous+0x46/frame 0xfffffe0056dbe850
user_ldt_alloc() at user_ldt_alloc+0x3d0/frame 0xfffffe0056dbe950
cpu_fork() at cpu_fork+0x26a/frame 0xfffffe0056dbe9b0
vm_forkproc() at vm_forkproc+0x225/frame 0xfffffe0056dbea10
do_fork() at do_fork+0x1980/frame 0xfffffe0056dbeaf0
fork1() at fork1+0xd58/frame 0xfffffe0056dbec10
sys_fork() at sys_fork+0xe3/frame 0xfffffe0056dbed10
ia32_syscall() at ia32_syscall+0x4d2/frame 0xfffffe0056dbef30
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xdfffcf98
panic: Assertion kstack_contains(td, (vm_offset_t)et, sizeof(*et)) failed at /syzkaller/managers/i386/kernel/sys/kern/subr_epoch.c:470
cpuid = 0
time = 1753489967
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xffffffff83d222d0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xffffffff83d22430
vpanic() at vpanic+0x257/frame 0xffffffff83d225f0
panic() at panic+0xb5/frame 0xffffffff83d226b0
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d226f0
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d227f0
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d228b0
vpanic() at vpanic+0x338/frame 0xffffffff83d22a70
panic() at panic+0xb5/frame 0xffffffff83d22b30
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d22b70
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d22c70
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d22d30
vpanic() at vpanic+0x338/frame 0xffffffff83d22ef0
panic() at panic+0xb5/frame 0xffffffff83d22fc0
DELAY() at DELAY+0x279/frame 0xffffffff83d23010
ns8250_putc() at ns8250_putc+0x172/frame 0xffffffff83d23070
uart_cnputc() at uart_cnputc+0xab/frame 0xffffffff83d230b0
cnputc() at cnputc+0x130/frame 0xffffffff83d230e0
db_putc() at db_putc+0x159/frame 0xffffffff83d23110
kvprintf() at kvprintf+0x1eda/frame 0xffffffff83d232d0
db_printf() at db_printf+0x125/frame 0xffffffff83d23420
db_show_malloc() at db_show_malloc+0x54e/frame 0xffffffff83d234b0
db_command() at db_command+0x5fc/frame 0xffffffff83d23650
db_command_loop() at db_command_loop+0x82/frame 0xffffffff83d23670
db_trap() at db_trap+0x27b/frame 0xffffffff83d237b0
kdb_trap() at kdb_trap+0x66c/frame 0xffffffff83d23970
nmi_call_kdb() at nmi_call_kdb+0x132/frame 0xffffffff83d239b0
nmi_call_kdb_smp() at nmi_call_kdb_smp+0x5f/frame 0xffffffff83d239f0
trap() at trap+0x232/frame 0xffffffff83d23be0
nmi_calltrap() at nmi_calltrap+0x8/frame 0xffffffff83d23be0
--- trap 0x13, rip = 0xffffffff8162d26d, rsp = 0xfffffe0056dbe570, rbp = 0xfffffe0056dbe5b0 ---
smp_rendezvous_action() at smp_rendezvous_action+0x5d/frame 0xfffffe0056dbe5b0
smp_rendezvous_cpus() at smp_rendezvous_cpus+0x2e7/frame 0xfffffe0056dbe7a0
smp_rendezvous() at smp_rendezvous+0x46/frame 0xfffffe0056dbe850
user_ldt_alloc() at user_ldt_alloc+0x3d0/frame 0xfffffe0056dbe950
cpu_fork() at cpu_fork+0x26a/frame 0xfffffe0056dbe9b0
vm_forkproc() at vm_forkproc+0x225/frame 0xfffffe0056dbea10
do_fork() at do_fork+0x1980/frame 0xfffffe0056dbeaf0
fork1() at fork1+0xd58/frame 0xfffffe0056dbec10
sys_fork() at sys_fork+0xe3/frame 0xfffffe0056dbed10
ia32_syscall() at ia32_syscall+0x4d2/frame 0xfffffe0056dbef30
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xdfffcf98
panic: Assertion kstack_contains(td, (vm_offset_t)et, sizeof(*et)) failed at /syzkaller/managers/i386/kernel/sys/kern/subr_epoch.c:470
cpuid = 0
time = 1753489967
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xffffffff83d21e50
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xffffffff83d21fb0
vpanic() at vpanic+0x257/frame 0xffffffff83d22170
panic() at panic+0xb5/frame 0xffffffff83d22230
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d22270
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d22370
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d22430
vpanic() at vpanic+0x338/frame 0xffffffff83d225f0
panic() at panic+0xb5/frame 0xffffffff83d226b0
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d226f0
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d227f0
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d228b0
vpanic() at vpanic+0x338/frame 0xffffffff83d22a70
panic() at panic+0xb5/frame 0xffffffff83d22b30
_epoch_enter_preempt() at _epoch_enter_preempt+0x354/frame 0xffffffff83d22b70
tcp_rl_shutdown() at tcp_rl_shutdown+0x9f/frame 0xffffffff83d22c70
kern_reboot() at kern_reboot+0x54e/frame 0xffffffff83d22d30
vpanic() at vpanic+0x338/frame 0xffffffff83d22ef0
panic() at panic+0xb5/frame 0xffffffff83d22fc0
DELAY() at DELAY+0x279/frame 0xffffffff83d23010
ns8250_putc() at ns8250_putc+0x172/frame 0xffffffff83d23070
uart_cnputc() at uart_cnputc+0xab/frame 0xffffffff83d230b0
cnputc() at cnputc+0x130/frame 0xffffffff83d230e0
db_putc() at db_putc+0x159/frame 0xffffffff83d23110
kvprintf() at kvprintf+0x1eda/frame 0xffffffff83d232d0
db_printf() at db_printf+0x125/frame 0xffffffff83d23420
db_show_malloc() at db_show_malloc+0x54e/frame 0xffffffff83d234b0
db_command() at db_command+0x5fc/frame 0xffffffff83d23650
db_command_loop() at db_command_loop+0x82/frame 0xffffffff83d23670
db_trap() at db_trap+0x27b/frame 0xffffffff83d237b0
kdb_trap() at kdb_trap+0x66c/frame 0xffffffff83d23970
nmi_call_kdb() at nmi_call_kdb+0x132/frame 0xffffffff83d239b0
nmi_call_kdb_smp() at nmi_call_kdb_smp+0x5f/frame 0xffffffff83d239f0
trap() at trap+0x232/frame 0xffffffff83d23be0
nmi_calltrap() at nmi_calltrap+0x8/frame 0xffffffff83d23be0
--- trap 0x13, rip = 0xffffffff8162d26d, rsp = 0xfffffe0056dbe570, rbp = 0xfffffe0056dbe5b0 ---
smp_rendezvous_action() at smp_rendezvous_action+0x5d/frame 0xfffffe0056dbe5b0
smp_rendezvous_cpus() at smp_rendezvous_cpus+0x2e7/frame 0xfffffe0056dbe7a0
smp_rendezvous() at smp_rendezvous+0x46/frame 0xfffffe0056dbe850
user_ldt_alloc() at user_ldt_alloc+0x3d0/frame 0xfffffe0056dbe950
cpu_fork() at cpu_fork+0x26a/frame 0xfffffe0056dbe9b0
vm_forkproc() at vm_forkproc+0x225/frame 0xfffffe0056dbea10
do_fork() at do_fork+0x1980/frame 0xfffffe0056dbeaf0
fork1() at fork1+0xd58/frame 0xfffffe0056dbec10
sys_fork() atSeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 2d8230d0-732e-2058-9e61-e99101c24fa8
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=6291456 = 3072 MiB
drive 0x000f2820: PCHS=0/0/0 translation=lba LCHS=780/128/63 s=6291456
Sending Seabios boot VM event.
Booting from Hard Disk 0...

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/26 00:33 freebsd-src 9ec37e8ff49c 8e9d1dc1 console log report ci-freebsd-i386 panic: sleeping thread[ htholredsa d tpuin_dm 2tx ti
* Struck through repros no longer work on HEAD.