kernel panic at /syzkaller/managers/main/kernel/kern/include/kref.h:68, from core 3: assertion failed: kref_refcnt(kref) > 0
Stack Backtrace on Core 3:
#01 [<0xffffffffc200a3ac>] in backtrace at src/kdebug.c:229
#02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268
#03 [<0xffffffffc203132b>] in kref_put at include/kref.h:68
#04 [<0xffffffffc20319e8>] in cclose at src/ns/chan.c:333
#05 [<0xffffffffc2033d8c>] in __namec_from at src/ns/chan.c:1397
#06 [<0xffffffffc20341af>] in namec at src/ns/chan.c:1516
#07 [<0xffffffffc203d9dc>] in syssymlink at src/ns/sysfile.c:492
#08 [<0xffffffffc20562b2>] in sys_symlink at src/syscall.c:1943
#09 [<0xffffffffc2059f59>] in syscall at src/syscall.c:2465
#10 [<0xffffffffc205a124>] in run_local_syscall at src/syscall.c:2500
#11 [<0xffffffffc205a659>] in prep_syscalls at src/syscall.c:2520
#12 [<0xffffffffc20ac10a>] in sysenter_callwrapper at arch/x86/trap.c:854
	Args: 0x0000000020000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000
kernel panic at kern/src/ns/chan.c:331, from core 2: cclose 0x0000000000000000
Stack Backtrace on Core 2:
#01 [<0xffffffffc200a3ac>] in backtrace at src/kdebug.c:229
#02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268
#03 [<0xffffffffc2031a0a>] in cclose at src/ns/chan.c:331
#04 [<0xffffffffc20333e9>] in walk_symlink at src/ns/chan.c:1702
#05 [<0xffffffffc20333d4>] in walk_symlink at src/ns/chan.c:1700
#06 [<0xffffffffc20333d4>] in walk_symlink at src/ns/chan.c:1700
#07 [<0xffffffffc20333d4>] in walk_symlink at src/ns/chan.c:1700
#08 [<0xffffffffc20333d4>] in walk_symlink at src/ns/chan.c:1700
#09 [<0xffffffffc20333d4>] in walk_symlink at src/ns/chan.c:1700
#10 [<0xffffffffc2032ef2>] in walk at src/ns/chan.c:871
#11 [<0xffffffffc20335c9>] in __namec_from at src/ns/chan.c:1138
#12 [<0xffffffffc20341af>] in namec at src/ns/chan.c:1516
#13 [<0xffffffffc203e02d>] in sysrename at src/ns/sysfile.c:871
#14 [<0xffffffffc2056732>] in sys_rename at src/syscall.c:2286
#15 [<0xffffffffc2059f59>] in syscall at src/syscall.c:2465
#16 [<0xffffffffc205a124>] in run_local_syscall at src/syscall.c:2500
#17 [<0xffffffffc205a659>] in prep_syscalls at src/syscall.c:2520
#18 [<0xffffffffc20ac10a>] in sysenter_callwrapper at arch/x86/trap.c:854
SW TRAP frame (partial) at 0xffffffffc89a9ee0 on core 1
  rbx  0x000030000003ce00
  rbp  0x000030000003cef0
  r12  0x0000000000000000
  r13  0x0000000000485646
  r14  0x00000000004871b8
  r15  0x0000000000000000
ROS(Core 3)>   gsbs 0x0000000000000000
  fsbs 0x0000000000000000
  rip  0x00000000004373be
  rsp  0x000030000003cd20
 mxcsr 0x00001f80
 fpucw 0x037f