panic: kernel diagnostic assertion "kd_lookup(kd->kd_unit) == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/dev/kcov.c", line 306
Starting stack trace...
panic(ffffffff8339a25d) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833db851,ffffffff833dded3,132,ffffffff834429ad) at __assert+0x29 sys/kern/subr_prf.c:-1
kcovopen(113d4,102,2000,ffff80002a295a08) at kcovopen+0x14f kd_lookup sys/dev/kcov.c:478 [inline]
kcovopen(113d4,102,2000,ffff80002a295a08) at kcovopen+0x14f sys/dev/kcov.c:306
spec_open_clone(ffff80003c473498) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff80003c473498) at spec_open+0x319 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd805cb22950,102,fffffd80097fb618,ffff80002a295a08) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff80003c473640,102,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
sys_ktrace(ffff80002a295a08,ffff80003c473820,ffff80003c473770) at sys_ktrace+0x9a sys/kern/kern_ktrace.c:551
syscall(ffff80003c473820) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c473820) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb3cd99df1e0, count: 247
End of stack trace.
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