Warning: Permanently added '10.128.0.185' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.758853][ T9328] ------------[ cut here ]------------ [ 77.764444][ T9328] verifier backtracking bug [ 77.764536][ T9328] WARNING: CPU: 0 PID: 9328 at kernel/bpf/verifier.c:1785 __mark_chain_precision+0x19bb/0x1ee0 [ 77.779584][ T9328] Kernel panic - not syncing: panic_on_warn set ... [ 77.786179][ T9328] CPU: 0 PID: 9328 Comm: syz-executor934 Not tainted 5.2.0-next-20190708 #33 [ 77.794929][ T9328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.804994][ T9328] Call Trace: [ 77.808314][ T9328] dump_stack+0x172/0x1f0 [ 77.812656][ T9328] ? __mark_chain_precision+0x1980/0x1ee0 [ 77.818413][ T9328] panic+0x2dc/0x755 [ 77.822314][ T9328] ? add_taint.cold+0x16/0x16 [ 77.827015][ T9328] ? __kasan_check_read+0x11/0x20 [ 77.832058][ T9328] ? __warn.cold+0x5/0x4c [ 77.836393][ T9328] ? __warn+0xe7/0x1e0 [ 77.840477][ T9328] ? __mark_chain_precision+0x19bb/0x1ee0 [ 77.846320][ T9328] __warn.cold+0x20/0x4c [ 77.850583][ T9328] ? vprintk_emit+0x1ea/0x700 [ 77.855279][ T9328] ? __mark_chain_precision+0x19bb/0x1ee0 [ 77.861000][ T9328] report_bug+0x263/0x2b0 [ 77.865331][ T9328] do_error_trap+0x11b/0x200 [ 77.869940][ T9328] do_invalid_op+0x37/0x50 [ 77.874394][ T9328] ? __mark_chain_precision+0x19bb/0x1ee0 [ 77.880132][ T9328] invalid_op+0x14/0x20 [ 77.884318][ T9328] RIP: 0010:__mark_chain_precision+0x19bb/0x1ee0 [ 77.890671][ T9328] Code: 08 31 ff 89 de e8 95 a1 f2 ff 84 db 0f 85 ce fe ff ff e8 48 a0 f2 ff 48 c7 c7 e0 9c 91 87 c6 05 3f 6b 21 08 01 e8 4d 09 c4 ff <0f> 0b 41 bc f2 ff ff ff e9 af fe ff ff e8 c3 df 2c 00 e9 c2 e7 ff [ 77.910295][ T9328] RSP: 0018:ffff88809beb7380 EFLAGS: 00010286 [ 77.916376][ T9328] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.924351][ T9328] RDX: 0000000000000000 RSI: ffffffff815c0a86 RDI: ffffed10137d6e62 [ 77.932345][ T9328] RBP: ffff88809beb74d0 R08: ffff88809efc82c0 R09: 0000000000000000 [ 77.940328][ T9328] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 77.948334][ T9328] R13: ffff88808fdd2d00 R14: 0000000000000001 R15: ffff8880978d0d80 [ 77.956329][ T9328] ? vprintk_func+0x86/0x189 [ 77.960935][ T9328] ? print_verifier_state+0x11b0/0x11b0 [ 77.966564][ T9328] ? __x64_sys_bpf+0x73/0xb0 [ 77.971183][ T9328] ? bpf_verifier_log_write+0x240/0x240 [ 77.976748][ T9328] ? check_reg_arg+0x1f1/0x480 [ 77.981535][ T9328] ? apparmor_capable+0x2ed/0x630 [ 77.986566][ T9328] check_cond_jmp_op+0xcd8/0x3c30 [ 77.991601][ T9328] ? find_held_lock+0x35/0x130 [ 77.996376][ T9328] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 78.002117][ T9328] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.008389][ T9328] ? check_func_arg+0x11c0/0x11c0 [ 78.013447][ T9328] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.019699][ T9328] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.025976][ T9328] ? krealloc+0x7b/0xd0 [ 78.030138][ T9328] ? krealloc+0x7b/0xd0 [ 78.034303][ T9328] ? rcu_read_lock_sched_held+0x110/0x130 [ 78.040024][ T9328] ? kfree+0x28b/0x2c0 [ 78.044096][ T9328] ? krealloc+0x7b/0xd0 [ 78.048278][ T9328] ? push_jmp_history.isra.0+0x1a9/0x260 [ 78.053940][ T9328] do_check+0x6389/0x8a50 [ 78.058297][ T9328] ? find_held_lock+0x35/0x130 [ 78.063075][ T9328] ? check_helper_call+0x3210/0x3210 [ 78.068388][ T9328] ? kfree+0x226/0x2c0 [ 78.072479][ T9328] ? kvfree+0x61/0x70 [ 78.076477][ T9328] ? kfree+0x226/0x2c0 [ 78.080556][ T9328] ? lockdep_hardirqs_on+0x418/0x5d0 [ 78.085862][ T9328] ? trace_hardirqs_on+0x67/0x240 [ 78.090884][ T9328] ? kvfree+0x61/0x70 [ 78.094873][ T9328] bpf_check+0x6f99/0x9948 [ 78.099305][ T9328] ? do_check+0x8a50/0x8a50 [ 78.103834][ T9328] ? lock_downgrade+0x920/0x920 [ 78.108704][ T9328] ? ktime_get_with_offset+0x13a/0x350 [ 78.114191][ T9328] ? bpf_prog_load+0xdce/0x1670 [ 78.119131][ T9328] ? ktime_get_with_offset+0x13a/0x350 [ 78.124787][ T9328] ? lockdep_hardirqs_on+0x418/0x5d0 [ 78.130184][ T9328] ? trace_hardirqs_on+0x67/0x240 [ 78.135239][ T9328] ? memset+0x32/0x40 [ 78.139228][ T9328] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 78.145552][ T9328] ? bpf_obj_name_cpy+0x13f/0x190 [ 78.150616][ T9328] bpf_prog_load+0xe68/0x1670 [ 78.155313][ T9328] ? bpf_prog_new_fd+0x60/0x60 [ 78.160082][ T9328] ? lock_downgrade+0x920/0x920 [ 78.164972][ T9328] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.171213][ T9328] ? security_bpf+0x8b/0xc0 [ 78.175736][ T9328] __do_sys_bpf+0xa46/0x42f0 [ 78.180351][ T9328] ? bpf_prog_load+0x1670/0x1670 [ 78.185307][ T9328] ? lock_downgrade+0x920/0x920 [ 78.190185][ T9328] ? __kasan_check_read+0x11/0x20 [ 78.195221][ T9328] ? up_read+0x159/0x570 [ 78.199495][ T9328] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.204959][ T9328] ? do_syscall_64+0x26/0x6a0 [ 78.209638][ T9328] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.215797][ T9328] ? do_syscall_64+0x26/0x6a0 [ 78.220491][ T9328] __x64_sys_bpf+0x73/0xb0 [ 78.224935][ T9328] do_syscall_64+0xfd/0x6a0 [ 78.229449][ T9328] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.235346][ T9328] RIP: 0033:0x440369 [ 78.239239][ T9328] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 78.258862][ T9328] RSP: 002b:00007ffdbac96b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 78.267298][ T9328] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 78.275284][ T9328] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 78.283256][ T9328] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 78.291234][ T9328] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401bf0 [ 78.299222][ T9328] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 78.308369][ T9328] Kernel Offset: disabled [ 78.312807][ T9328] Rebooting in 86400 seconds..