kernel panic at /syzkaller/managers/main/kernel/kern/include/kref.h:68, from core 1: assertion failed: kref_refcnt(kref) > 0 Stack Backtrace on Core 1: #01 [<0xffffffffc200a38c>] in backtrace at src/kdebug.c:229 #02 [<0xffffffffc2009b25>] in _panic at src/init.c:267 #03 [<0xffffffffc203115b>] in kref_put at include/kref.h:68 #04 [<0xffffffffc2031828>] in cclose at src/ns/chan.c:334 #05 [<0xffffffffc2033251>] in walk_symlink at src/ns/chan.c:1703 #06 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #07 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #08 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #09 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #10 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #11 [<0xffffffffc203323c>] in walk_symlink at src/ns/chan.c:1701 #12 [<0xffffffffc2032d52>] in walk at src/ns/chan.c:872 #13 [<0xffffffffc2033429>] in __namec_from at src/ns/chan.c:1139 #14 [<0xffffffffc2034013>] in namec at src/ns/chan.c:1517 #15 [<0xffffffffc203e3b3>] in __dir_stat at src/ns/sysfile.c:1219 #16 [<0xffffffffc203e48e>] in sysdirlstat at src/ns/sysfile.c:1239 #17 [<0xffffffffc2058ab4>] in sys_readlink at src/syscall.c:1960 #18 [<0xffffffffc205a019>] in syscall at src/syscall.c:2465 #19 [<0xffffffffc205a1f8>] in run_local_syscall at src/syscall.c:2500 #20 [<0xffffffffc205a739>] in prep_syscalls at src/syscall.c:2520 kernel panic at kern/drivers/dev/mnt.c:1120, from core 0: rpc tags Stack Backtrace on Core 0: #01 [<0xffffffffc200a38c>] in backtrace at src/kdebug.c:229 #02 [<0xffffffffc2009b25>] in _panic at src/init.c:267 #03 [<0xffffffffc207ecca>] in mntralloc at drivers/dev/mnt.c:1120 #04 [<0xffffffffc207ed73>] in mntflushalloc at drivers/dev/mnt.c:1047 #05 [<0xffffffffc207f210>] in mountio at drivers/dev/mnt.c:845 #06 [<0xffffffffc207f305>] in mountrpc at drivers/dev/mnt.c:778 #07 [<0xffffffffc207fe38>] in mntopencreate at drivers/dev/mnt.c:563 #08 [<0xffffffffc207ff98>] in mntopen at drivers/dev/mnt.c:580 #09 [<0xffffffffc2033830>] in __namec_from at src/ns/chan.c:1233 #10 [<0xffffffffc2034013>] in namec at src/ns/chan.c:1517 #11 [<0xffffffffc20413e6>] in sysopenat at src/ns/sysfile.c:592 #12 [<0xffffffffc205940f>] in sys_openat at src/syscall.c:1724 #13 [<0xffffffffc205a019>] in syscall at src/syscall.c:2465 #14 [<0xffffffffc205a1f8>] in run_local_syscall at src/syscall.c:2500 #15 [<0xffffffffc205a739>] in prep_syscalls at src/syscall.c:2520 #16 [<0xffffffffc20abee2>] in sysenter_callwrapper at arch/x86/trap.c:854