syzkaller login: [ 86.055897][ T26] audit: type=1400 audit(1563324730.595:35): avc: denied { map } for pid=10029 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. executing program [ 92.702938][ T26] audit: type=1400 audit(1563324737.245:36): avc: denied { map } for pid=10041 comm="syz-executor165" path="/root/syz-executor165921201" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 92.707376][T10041] ------------[ cut here ]------------ [ 92.730775][ T26] audit: type=1400 audit(1563324737.245:37): avc: denied { prog_load } for pid=10041 comm="syz-executor165" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 92.760947][T10041] verifier backtracking bug [ 92.761164][T10041] WARNING: CPU: 0 PID: 10041 at kernel/bpf/verifier.c:1785 __mark_chain_precision+0x19bb/0x1ee0 [ 92.776523][T10041] Kernel panic - not syncing: panic_on_warn set ... [ 92.783210][T10041] CPU: 0 PID: 10041 Comm: syz-executor165 Not tainted 5.2.0+ #58 [ 92.790910][T10041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.800970][T10041] Call Trace: [ 92.804281][T10041] dump_stack+0x172/0x1f0 [ 92.808720][T10041] ? __mark_chain_precision+0x1900/0x1ee0 [ 92.814459][T10041] panic+0x2dc/0x755 [ 92.818354][T10041] ? add_taint.cold+0x16/0x16 [ 92.823036][T10041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.829560][T10041] ? __warn.cold+0x5/0x4c [ 92.834220][T10041] ? __warn+0xe7/0x1e0 [ 92.838285][T10041] ? __mark_chain_precision+0x19bb/0x1ee0 [ 92.844023][T10041] __warn.cold+0x20/0x4c [ 92.848281][T10041] ? vprintk_emit+0x1ea/0x700 [ 92.852955][T10041] ? __mark_chain_precision+0x19bb/0x1ee0 [ 92.860166][T10041] report_bug+0x263/0x2b0 [ 92.864521][T10041] do_error_trap+0x11b/0x200 [ 92.869343][T10041] do_invalid_op+0x37/0x50 [ 92.873755][T10041] ? __mark_chain_precision+0x19bb/0x1ee0 [ 92.879499][T10041] invalid_op+0x14/0x20 [ 92.883677][T10041] RIP: 0010:__mark_chain_precision+0x19bb/0x1ee0 [ 92.890198][T10041] Code: 08 31 ff 89 de e8 d5 b2 f2 ff 84 db 0f 85 ce fe ff ff e8 88 b1 f2 ff 48 c7 c7 c0 79 91 87 c6 05 f9 a7 1f 08 01 e8 ad 5a c4 ff <0f> 0b 41 bc f2 ff ff ff e9 af fe ff ff e8 23 9a 2c 00 e9 c2 e7 ff [ 92.912068][T10041] RSP: 0018:ffff888099c9f380 EFLAGS: 00010286 [ 92.918143][T10041] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 92.926195][T10041] RDX: 0000000000000000 RSI: ffffffff815c10d6 RDI: ffffed1013393e62 [ 92.934180][T10041] RBP: ffff888099c9f4d0 R08: ffff88808768a700 R09: 0000000000000000 [ 92.942186][T10041] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 92.950743][T10041] R13: ffff888079094bc0 R14: 0000000000000001 R15: ffff888097bc13c0 [ 92.959785][T10041] ? vprintk_func+0x86/0x189 [ 92.964412][T10041] ? print_verifier_state+0x11b0/0x11b0 [ 92.969970][T10041] ? __x64_sys_bpf+0x73/0xb0 [ 92.974664][T10041] ? bpf_verifier_log_write+0x240/0x240 [ 92.980209][T10041] ? check_reg_arg+0x1f1/0x480 [ 92.985160][T10041] check_cond_jmp_op+0xcd8/0x3c30 [ 92.990289][T10041] ? find_held_lock+0x35/0x130 [ 92.995067][T10041] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 93.000889][T10041] ? check_func_arg+0x11c0/0x11c0 [ 93.005916][T10041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.012152][T10041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.018753][T10041] ? krealloc+0x7b/0xd0 [ 93.022922][T10041] ? krealloc+0x7b/0xd0 [ 93.027078][T10041] ? rcu_read_lock_sched_held+0x110/0x130 [ 93.032812][T10041] ? kfree+0x28b/0x2c0 [ 93.036967][T10041] ? krealloc+0x7b/0xd0 [ 93.041149][T10041] ? push_jmp_history.isra.0+0x1a9/0x260 [ 93.046783][T10041] do_check+0x6389/0x8a50 [ 93.053050][T10041] ? find_held_lock+0x35/0x130 [ 93.057849][T10041] ? check_helper_call+0x3210/0x3210 [ 93.063141][T10041] ? kfree+0x226/0x2c0 [ 93.067570][T10041] ? kvfree+0x61/0x70 [ 93.071569][T10041] ? kfree+0x226/0x2c0 [ 93.075633][T10041] ? lockdep_hardirqs_on+0x418/0x5d0 [ 93.080908][T10041] ? trace_hardirqs_on+0x67/0x240 [ 93.085936][T10041] ? kvfree+0x61/0x70 [ 93.089935][T10041] bpf_check+0x6f99/0x9950 [ 93.094389][T10041] ? do_check+0x8a50/0x8a50 [ 93.098991][T10041] ? lock_downgrade+0x920/0x920 [ 93.103858][T10041] ? ktime_get_with_offset+0x13a/0x360 [ 93.109308][T10041] ? bpf_prog_load+0xdce/0x1670 [ 93.114166][T10041] ? ktime_get_with_offset+0x13a/0x360 [ 93.119649][T10041] ? lockdep_hardirqs_on+0x418/0x5d0 [ 93.125125][T10041] ? trace_hardirqs_on+0x67/0x240 [ 93.130238][T10041] ? memset+0x32/0x40 [ 93.134741][T10041] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 93.142239][T10041] ? bpf_obj_name_cpy+0x13f/0x190 [ 93.147265][T10041] bpf_prog_load+0xe68/0x1670 [ 93.151955][T10041] ? bpf_prog_new_fd+0x60/0x60 [ 93.156742][T10041] ? lock_downgrade+0x920/0x920 [ 93.162029][T10041] ? selinux_bpf+0xe7/0x130 [ 93.166587][T10041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.172821][T10041] ? security_bpf+0x8b/0xc0 [ 93.178968][T10041] __do_sys_bpf+0xa46/0x42f0 [ 93.183876][T10041] ? bpf_prog_load+0x1670/0x1670 [ 93.188931][T10041] ? lock_downgrade+0x920/0x920 [ 93.193789][T10041] ? __kasan_check_write+0x14/0x20 [ 93.198900][T10041] ? up_read+0x159/0x570 [ 93.203525][T10041] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.209334][T10041] ? do_syscall_64+0x26/0x6a0 [ 93.214099][T10041] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.220532][T10041] ? do_syscall_64+0x26/0x6a0 [ 93.225585][T10041] __x64_sys_bpf+0x73/0xb0 [ 93.230389][T10041] do_syscall_64+0xfd/0x6a0 [ 93.234906][T10041] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.240926][T10041] RIP: 0033:0x440369 [ 93.245306][T10041] 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 [ 93.265247][T10041] RSP: 002b:00007ffd3b924b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 93.274399][T10041] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 93.282720][T10041] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 93.291745][T10041] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 93.299728][T10041] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401bf0 [ 93.308065][T10041] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 93.317279][T10041] Kernel Offset: disabled [ 93.321707][T10041] Rebooting in 86400 seconds..