panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/pipex.c", line 501
Starting stack trace...
panic(ffffffff83339972) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8337a503,ffffffff832d512d,1f5,ffffffff833370c2) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80002d128000) at pipex_unlink_session_locked+0x402
pipex_destroy_all_sessions(ffff80000148b800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff80000148b800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:153
pppacclose(637e,41,2000,ffff80003c9f8030) a
t pppacclose+0x16f
spec_close(ffff80003894cd70) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8074bb1b48,41,fffffd8007bfb410,ffff80003c9f8030) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806bd00bd0,ffff80003c9f8030) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806bd00bd0,ffff80003c9f8030) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd806bd00bd0,ffff80003c9f8030) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806bd00bd0,ffff80003c9f8030) at closef+0x190 sys/kern/kern_descrip.c:1264
syscall(ffff80003894cfc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003894cfc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb32f0824a80, count: 245
End of stack trace.
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