panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/pipex.c", line 501
Starting stack trace...
panic(ffffffff8333e6b3) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8337a773,ffffffff832d479f,1f5,ffffffff83335f12) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80002a845928) at pipex_unlink_session_locked+0x402
pipex_destroy_all_sessions(ffff800001494800) at pipex_
destroy_all_sessions+0xd9
pppacclose(637e,83,2000,ffff80003c984a98) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff800038967610) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805f8061c8,83,fffffd8007bfb7b8,ffff80003c984a98) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd807e0f62e0,ffff80003c984a98) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd807e0f62e0,ffff80003c984a98) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd807e0f62e0,ffff80003c984a98) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd807e0f62e0,ffff80003c984a98) at closef+0x190 sys/kern/kern_descrip.c:1264
finishdup(ffff80003c984a98,fffffd807e0f63d0,6,5,ffff800038967860,2) at finishdup+0x46d sys/kern/kern_descrip.c:688
syscall(ffff800038967910) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff800038967910) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x66e751dbe00, count: 244
End of stack trace.
syncing disks...set $lines = 0
set $maxwidth = 0
show panic
trace
show registers
show proc
ps
show all locks
show malloc
show all pools
machine ddbcpu 0
trace
machine ddbcpu 1
trace