panic: Assertion v != tid failed at /syzkaller/managers/main/kernel/sys/kern/kern_mutex.c:941
cpuid = 0
time = 16
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe005701ecf0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe005701ee50
vpanic() at vpanic+0x257/frame 0xfffffe005701f010
panic() at panic+0xb5/frame 0xfffffe005701f0d0
thread_lock_flags_() at thread_lock_flags_+0x52e/frame 0xfffffe005701f1f0
propagate_priority() at propagate_priority+0xdd/frame 0xfffffe005701f240
turnstile_wait() at turnstile_wait+0x663/frame 0xfffffe005701f2b0
__rw_wlock_hard() at __rw_wlock_hard+0x946/frame 0xfffffe005701f430
_rw_wlock_cookie() at _rw_wlock_cookie+0x1ba/frame 0xfffffe005701f4f0
kmem_back_domain() at kmem_back_domain+0x183/frame 0xfffffe005701f5f0
kmem_malloc_domainset() at kmem_malloc_domainset+0x1e7/frame 0xfffffe005701f730
keg_alloc_slab() at keg_alloc_slab+0x1f1/frame 0xfffffe005701f850
zone_import() at zone_import+0x2f9/frame 0xfffffe005701fa30
cache_alloc() at cache_alloc+0x7e5/frame 0xfffffe005701fb00
cache_alloc_retry() at cache_alloc_retry+0x35/frame 0xfffffe005701fb40
bucket_alloc() at bucket_alloc+0x1a4/frame 0xfffffe005701fb90
cache_free() at cache_free+0x32f/frame 0xfffffe005701fc00
uma_zfree_arg() at uma_zfree_arg+0x497/frame 0xfffffe005701fca0
free() at free+0x115/frame 0xfffffe005701fce0
ktr_submitrequest() at ktr_submitrequest+0xcd/frame 0xfffffe005701fd10
amd64_syscall() at amd64_syscall+0xaa9/frame 0xfffffe005701ff30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe005701ff30
--- syscall (477, FreeBSD ELF64, mmap), rip = 0x3a551a, rsp = 0x820e806f8, rbp = 0x820e80740 ---
KDB: enter: panic
[ thread pid 1344 tid 100811 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x259e0f7(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0xfffffe0002bf1850
rdx                          0
rbx         0xffffffff828086a0  .str.27
rsp         0xfffffe005701ee30
rbp         0xfffffe005701ee50
rsi                          0
rdi         0xffffffff81644349  printf+0x149
r8                           0
r9                  0xffffffff
r10                          0
r11                        0xd
r12         0xfffffe005414d780
r13         0xfffffffffffffffe
r14         0xffffffff828086a0  .str.27
r15                          0
rip         0xffffffff8162da9e  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x259e0f7(%rip)
db>