kernel panic at /syzkaller/managers/main/kernel/kern/include/kref.h:68, from core 2: assertion failed: kref_refcnt(kref) > 0 Stack Backtrace on Core 2: #01 [<0xffffffffc200a33c>] in backtrace at src/kdebug.c:220 #02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268 #03 [< [inline] >] in kref_put at include/kref.h:68 #03 [<0xffffffffc200abab>] in kfree at src/kmalloc.c:236 #04 [<0xffffffffc20313b4>] in kstrdup at src/ns/chan.c:122 #05 [<0xffffffffc2074bc3>] in conswrite at drivers/dev/cons.c:1246 #06 [<0xffffffffc207d5de>] in mntversion at drivers/dev/mnt.c:213 #07 [<0xffffffffc207e9f2>] in mntattach at drivers/dev/mnt.c:360 #08 [<0xffffffffc203f331>] in sysmount at src/ns/sysfile.c:528 #09 [<0xffffffffc2055bf1>] in sys_nmount at src/syscall.c:2186 #10 [<0xffffffffc2059569>] in syscall at src/syscall.c:2455 #11 [<0xffffffffc2059734>] in run_local_syscall at src/syscall.c:2490 #12 [<0xffffffffc2059c69>] in prep_syscalls at src/syscall.c:2510 #13 [<0xffffffffc20ab5fa>] in sysenter_callwrapper at arch/x86/trap.c:854