syzbot

kernel panic at kern/src/kmalloc.c:138, from core 0: Bad canary
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a2bc>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009afd>] in _panic at src/init.c:268
#03 [<0xffffffffc200a626>] in __get_km_tag at src/kmalloc.c:138
#04 [<0xffffffffc200aa1b>] in kfree at src/kmalloc.c:236
#05 [<     [inline]     >] in free_fd_set at src/ns/sysfile.c:1692
#05 [<0xffffffffc204191c>] in close_fdt at src/ns/sysfile.c:1835
#06 [<0xffffffffc204cedf>] in proc_destroy at src/process.c:918
#07 [<0xffffffffc2056d36>] in sys_proc_destroy at src/syscall.c:909
#08 [<0xffffffffc2059439>] in syscall at src/syscall.c:2528
#09 [<0xffffffffc2059604>] in run_local_syscall at src/syscall.c:2563
#10 [<0xffffffffc2059b39>] in prep_syscalls at src/syscall.c:2583
#11 [<0xffffffffc20ab38a>] in sysenter_callwrapper at arch/x86/trap.c:854