Warning: Permanently added '[localhost]:34869' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.837903][ T3073] ------------[ cut here ]------------ [ 101.838621][ T3073] Too BIG xdp->frame_sz = 16384 [ 101.840150][ T3073] WARNING: CPU: 1 PID: 3073 at net/core/filter.c:4121 bpf_xdp_adjust_tail+0x184/0x2e0 [ 101.847834][ T3073] Modules linked in: [ 101.850308][ T3073] CPU: 1 PID: 3073 Comm: syz-executor194 Not tainted 6.4.0-syzkaller-04247-g3a8a670eeeaa #0 [ 101.851074][ T3073] Hardware name: linux,dummy-virt (DT) [ 101.851592][ T3073] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 101.852050][ T3073] pc : bpf_xdp_adjust_tail+0x184/0x2e0 [ 101.852353][ T3073] lr : bpf_xdp_adjust_tail+0x184/0x2e0 [ 101.852751][ T3073] sp : ffff800082b33a40 [ 101.853148][ T3073] x29: ffff800082b33a40 x28: ffff800082b33d50 x27: ffff800082b33a90 [ 101.853817][ T3073] x26: 0000000000000000 x25: ffff800082b33a90 x24: ffffffffffffffea [ 101.854345][ T3073] x23: f5ff000005a93ec0 x22: f5ff000005a90f81 x21: f5ff000005a90f81 [ 101.855139][ T3073] x20: 0000000000000000 x19: ffff800082b33b90 x18: 00000000fffffffb [ 101.855698][ T3073] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000020 [ 101.856163][ T3073] x14: ffff80008240b048 x13: 000000000000083a x12: 00000000000002be [ 101.857204][ T3073] x11: fffffffffffcae58 x10: ffff8000824bb048 x9 : 00000000ffffe000 [ 101.857839][ T3073] x8 : ffff80008240b048 x7 : ffff8000824bb048 x6 : 0000000000000000 [ 101.858296][ T3073] x5 : ffff00007f9cecc8 x4 : 0000000000000000 x3 : ffff7ffffd60e000 [ 101.858956][ T3073] x2 : 0000000000000000 x1 : 0000000000000000 x0 : f2ff000002cfcec0 [ 101.859582][ T3073] Call trace: [ 101.859902][ T3073] bpf_xdp_adjust_tail+0x184/0x2e0 [ 101.860519][ T3073] bpf_prog_4add87e5301a4105+0x48/0x78 [ 101.861251][ T3073] bpf_dispatcher_xdp_func+0x10/0x1c [ 101.861555][ T3073] bpf_prog_run_generic_xdp+0xec/0x3c0 [ 101.861888][ T3073] do_xdp_generic.part.0+0xc0/0x1d4 [ 101.862300][ T3073] do_xdp_generic+0x14/0x28 [ 101.862658][ T3073] tun_get_user+0x584/0xf24 [ 101.862982][ T3073] tun_chr_write_iter+0x5c/0xe8 [ 101.863292][ T3073] vfs_write+0x2d0/0x39c [ 101.863582][ T3073] ksys_write+0x68/0xf4 [ 101.863893][ T3073] __arm64_sys_write+0x1c/0x28 [ 101.864240][ T3073] invoke_syscall+0x48/0x114 [ 101.864547][ T3073] el0_svc_common.constprop.0+0x44/0xe4 [ 101.865033][ T3073] do_el0_svc+0x38/0xa4 [ 101.865495][ T3073] el0_svc+0x2c/0xb0 [ 101.865781][ T3073] el0t_64_sync_handler+0xc0/0xc4 [ 101.866101][ T3073] el0t_64_sync+0x19c/0x1a0 [ 101.866632][ T3073] ---[ end trace 0000000000000000 ]--- [ 101.867997][ T3073] Illegal XDP return value 4294967274 on prog (id 1) dev syz_tun, expect packet loss! executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program VM DIAGNOSIS: 17:05:27 Registers: info registers vcpu 0 PC=fffffbfffddf9010 X00=0000000000000000 X01=0000fffff73f4754 X02=0000000040000001 X03=0000000000000000 X04=0000aaaab15f7000 X05=0000000008000000 X06=0000000000000065 X07=00000000000049ec X08=0000000000000104 X09=00000000000049ec X10=0000000000000017 X11=00160dc080000000 X12=000000017cfa971f X13=000000007fffffff X14=ffffffffffffffff X15=0000000000000038 X16=0000ffffb4b15008 X17=0000ffffb4a99880 X18=0000000000000000 X19=ffffffffffffffff X20=0000000000018d2d X21=0000ffffb4b15000 X22=0000aaaab15f7700 X23=0000fffff73f4770 X24=0000000040000001 X25=0000fffff73f4754 X26=0000ffffb4b17000 X27=0000ffffb4b19090 X28=0000ffffb4b190a0 X29=0000fffff73f46c0 X30=0000ffffb4a825d0 SP=ffff800082b24000 PSTATE=404003c9 -Z-- EL2h BTYPE=0 FPCR=00000000 FPSR=00000000 P00=0000 P01=0000 P02=0000 P03=0000 P04=0000 P05=0000 P06=0000 P07=0000 P08=0000 P09=0000 P10=0000 P11=0000 P12=0000 P13=0000 P14=0000 P15=0000 FFR=0000 Z00=0000000000000000:0000000000000000 Z01=203d3e206469736e:0000000000000000 Z02=47203c206469736e:0000000000000030 Z03=0000000000000000:ffffffffffffffff Z04=0000000000000000:ffffffffffffff00 Z05=0000000000000000:4010040140100401 Z06=0000000000000000:4010040140100400 Z07=4010040140100401:4010040140100401 Z08=0000000000000000:0000000000000000 Z09=0000000000000000:0000000000000000 Z10=0000000000000000:0000000000000000 Z11=0000000000000000:0000000000000000 Z12=0000000000000000:0000000000000000 Z13=0000000000000000:0000000000000000 Z14=0000000000000000:0000000000000000 Z15=0000000000000000:0000000000000000 Z16=0000555400005555:0000555400005555 Z17=ff00ff0000000000:ff00ff0000000000 Z18=0000000000000000:0000000000000000 Z19=0000000000000000:0000000000000000 Z20=0000000000000000:0000000000000000 Z21=0000000000000000:0000000000000000 Z22=0000000000000000:0000000000000000 Z23=0000000000000000:0000000000000000 Z24=0000000000000000:0000000000000000 Z25=0000000000000000:0000000000000000 Z26=0000000000000000:0000000000000000 Z27=0000000000000000:0000000000000000 Z28=0000000000000000:0000000000000000 Z29=0000000000000000:0000000000000000 Z30=0000000000000000:0000000000000000 Z31=0000000000000000:0000000000000000 info registers vcpu 1 PC=ffff800081868c0c X00=ffff8000826065e3 X01=0000000000000023 X02=6e69617420746f4e X03=0000000000000000 X04=0000000000000000 X05=ffff00007f9cecc8 X06=0000000000000000 X07=ffff8000824bb048 X08=ffff80008240b048 X09=00000000ffffe000 X10=ffff8000824bb048 X11=fffffffffffcaed8 X12=00000000000002c0 X13=0000000000000840 X14=ffff80008240b048 X15=0000000000000020 X16=5f66706220313231 X17=756a64615f706478 X18=00000000fffffffb X19=ffff8000820e1e68 X20=ffff800082067c08 X21=ffff8000820e1e68 X22=ffff80008263b190 X23=0000000000000001 X24=f2ff000002cfd610 X25=0000000000000c01 X26=ffff8000820e1e68 X27=000000000000001d X28=f2ff000002cfcec0 X29=ffff800082b33600 X30=fbf580008184c9cc SP=ffff800082b33600 PSTATE=624003c9 -ZC- EL2h BTYPE=0 FPCR=00000000 FPSR=00000000 P00=0000 P01=0000 P02=0000 P03=0000 P04=0000 P05=0000 P06=0000 P07=0000 P08=0000 P09=0000 P10=0000 P11=0000 P12=0000 P13=0000 P14=0000 P15=0000 FFR=0000 Z00=2525252525252525:2525252525252525 Z01=65732f636f72702f:0000000030303031 Z02=6a64615f65726f63:735f6d6f6f2f666c Z03=0000000000000000:ffffffff00000000 Z04=0000000000000000:0000000000000000 Z05=0000000000000000:4010040100000000 Z06=0000000000000000:0000000000000000 Z07=4010040140100401:4010040140100401 Z08=0000000000000000:0000000000000000 Z09=0000000000000000:0000000000000000 Z10=0000000000000000:0000000000000000 Z11=0000000000000000:0000000000000000 Z12=0000000000000000:0000000000000000 Z13=0000000000000000:0000000000000000 Z14=0000000000000000:0000000000000000 Z15=0000000000000000:0000000000000000 Z16=0000000000005500:0000000000005500 Z17=ff00ff0000000000:ff00ff0000000000 Z18=0000000000000000:0000000000000000 Z19=0000000000000000:0000000000000000 Z20=0000000000000000:0000000000000000 Z21=0000000000000000:0000000000000000 Z22=0000000000000000:0000000000000000 Z23=0000000000000000:0000000000000000 Z24=0000000000000000:0000000000000000 Z25=0000000000000000:0000000000000000 Z26=0000000000000000:0000000000000000 Z27=0000000000000000:0000000000000000 Z28=0000000000000000:0000000000000000 Z29=0000000000000000:0000000000000000 Z30=0000000000000000:0000000000000000 Z31=0000000000000000:0000000000000000