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(ffffffff833b423c) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833eeac7,ffffffff833eec13,132,ffffffff8345424c) at __assert+0x29 sys/kern/subr_prf.c:-1
kcovopen(113d4,50f,2000,ffff80003c435780) at kcovopen+0x14f kd_lookup sys/dev/kcov.c:478 [inline]
kcovopen(113d4,50f,2000,ffff80003c435780) at kcovopen+0x14f sys/dev/kcov.c:306
spec_open_clone(ffff80003c4df628) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff80003c4df628) at spec_open+0x319 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd8061066968,50f,fffffd80097fd548,ffff80003c435780) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff80003c4df870,70f,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff80003c435780,ffffff9c,200000000040,70e,0,ffff80003c4dfa20) at doopenat+0x35b sys/kern/vfs_syscalls.c:1138
syscall(ffff80003c4dfad0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4dfad0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfcb496c3050, count: 247
End of stack trace.
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