2́panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/pipex.c", line 501
Starting stack trace...
panic(ffffffff8333c541) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff83378a46,ffffffff832cd14c,1f5,ffffffff8332f42d) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003c9825b0) at pipex_unlink_session_locked+0x402
pipex_destroy_all_sessions(ffff800001447800) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001447800) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:153
pppacclose(637e,41,2000,ffff80002a7f8020) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80002a8e9450) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd80678d2eb8,41,fffffd8007bfb7b8,ffff80002a7f8020) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd800afbb6a0,ffff80002a7f8020) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd800afbb6a0,ffff80002a7f8020) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd800afbb6a0,ffff80002a7f8020) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd800afbb6a0,ffff80002a7f8020) at closef+0x190 sys/kern/kern_descrip.c:1264
syscall(ffff80002a8e96a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a8e96a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x800f1b18430, count: 245
End of stack trace.