[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 112.791398][ T8809] ===================================================== [ 112.798471][ T8809] BUG: KMSAN: uninit-value in bpf_skb_load_helper_16+0xd9/0x2b0 [ 112.806086][ T8809] CPU: 1 PID: 8809 Comm: syz-executor988 Not tainted 5.7.0-rc4-syzkaller #0 [ 112.814729][ T8809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.824767][ T8809] Call Trace: [ 112.828037][ T8809] dump_stack+0x1c9/0x220 [ 112.832348][ T8809] kmsan_report+0xf7/0x1e0 [ 112.836763][ T8809] __msan_warning+0x58/0xa0 [ 112.841251][ T8809] bpf_skb_load_helper_16+0xd9/0x2b0 [ 112.846531][ T8809] ___bpf_prog_run+0x214d/0x97a0 [ 112.851454][ T8809] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 112.857602][ T8809] ? bpf_skb_load_helper_8_no_cache+0x340/0x340 [ 112.863831][ T8809] __bpf_prog_run32+0x101/0x170 [ 112.868679][ T8809] ? kmsan_get_metadata+0x4f/0x180 [ 112.873772][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.879566][ T8809] ? ___bpf_prog_run+0x97a0/0x97a0 [ 112.884652][ T8809] sk_filter_trim_cap+0x42a/0xcc0 [ 112.889657][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 112.894849][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.900631][ T8809] unix_dgram_sendmsg+0x1987/0x3c30 [ 112.905806][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 112.910980][ T8809] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 112.917051][ T8809] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 112.922417][ T8809] ? unix_dgram_peer_wake_me+0x7d0/0x7d0 [ 112.928023][ T8809] kernel_sendmsg+0x433/0x440 [ 112.932696][ T8809] sock_no_sendpage+0x235/0x300 [ 112.937542][ T8809] ? sock_no_mmap+0x30/0x30 [ 112.942021][ T8809] sock_sendpage+0x1e1/0x2c0 [ 112.946591][ T8809] pipe_to_sendpage+0x38c/0x4c0 [ 112.951414][ T8809] ? sock_fasync+0x250/0x250 [ 112.956004][ T8809] __splice_from_pipe+0x539/0xed0 [ 112.961020][ T8809] ? generic_splice_sendpage+0x2d0/0x2d0 [ 112.966642][ T8809] generic_splice_sendpage+0x1d5/0x2d0 [ 112.972086][ T8809] ? iter_file_splice_write+0x17b0/0x17b0 [ 112.977780][ T8809] do_splice+0x1eae/0x2ec0 [ 112.982188][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 112.987364][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 112.992541][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.998344][ T8809] __se_sys_splice+0x426/0x520 [ 113.003090][ T8809] __x64_sys_splice+0x6e/0x90 [ 113.007747][ T8809] do_syscall_64+0xb8/0x160 [ 113.012228][ T8809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.018108][ T8809] RIP: 0033:0x4402b9 [ 113.021981][ T8809] 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 [ 113.041559][ T8809] RSP: 002b:00007fff817199e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 113.049960][ T8809] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 113.057907][ T8809] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 113.065855][ T8809] RBP: 00000000006ca018 R08: 000000000004ffe0 R09: 0000000000000000 [ 113.073807][ T8809] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40 [ 113.081757][ T8809] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 113.089711][ T8809] [ 113.092011][ T8809] Uninit was stored to memory at: [ 113.097012][ T8809] kmsan_internal_chain_origin+0xad/0x130 [ 113.102710][ T8809] __msan_chain_origin+0x50/0x90 [ 113.107623][ T8809] ___bpf_prog_run+0x6cbe/0x97a0 [ 113.112532][ T8809] __bpf_prog_run32+0x101/0x170 [ 113.117357][ T8809] sk_filter_trim_cap+0x42a/0xcc0 [ 113.122370][ T8809] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.127556][ T8809] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.132929][ T8809] kernel_sendmsg+0x433/0x440 [ 113.137593][ T8809] sock_no_sendpage+0x235/0x300 [ 113.142433][ T8809] sock_sendpage+0x1e1/0x2c0 [ 113.146999][ T8809] pipe_to_sendpage+0x38c/0x4c0 [ 113.151822][ T8809] __splice_from_pipe+0x539/0xed0 [ 113.156836][ T8809] generic_splice_sendpage+0x1d5/0x2d0 [ 113.162267][ T8809] do_splice+0x1eae/0x2ec0 [ 113.166654][ T8809] __se_sys_splice+0x426/0x520 [ 113.171390][ T8809] __x64_sys_splice+0x6e/0x90 [ 113.176042][ T8809] do_syscall_64+0xb8/0x160 [ 113.180519][ T8809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.186395][ T8809] [ 113.188697][ T8809] Uninit was stored to memory at: [ 113.193695][ T8809] kmsan_internal_chain_origin+0xad/0x130 [ 113.199388][ T8809] __msan_chain_origin+0x50/0x90 [ 113.204301][ T8809] ___bpf_prog_run+0x6c64/0x97a0 [ 113.209234][ T8809] __bpf_prog_run32+0x101/0x170 [ 113.214057][ T8809] sk_filter_trim_cap+0x42a/0xcc0 [ 113.219054][ T8809] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.224225][ T8809] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.229567][ T8809] kernel_sendmsg+0x433/0x440 [ 113.234233][ T8809] sock_no_sendpage+0x235/0x300 [ 113.239056][ T8809] sock_sendpage+0x1e1/0x2c0 [ 113.243617][ T8809] pipe_to_sendpage+0x38c/0x4c0 [ 113.248439][ T8809] __splice_from_pipe+0x539/0xed0 [ 113.253435][ T8809] generic_splice_sendpage+0x1d5/0x2d0 [ 113.258865][ T8809] do_splice+0x1eae/0x2ec0 [ 113.263255][ T8809] __se_sys_splice+0x426/0x520 [ 113.267991][ T8809] __x64_sys_splice+0x6e/0x90 [ 113.272641][ T8809] do_syscall_64+0xb8/0x160 [ 113.277144][ T8809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.283003][ T8809] [ 113.285308][ T8809] Local variable ----regs@__bpf_prog_run32 created at: [ 113.292236][ T8809] __bpf_prog_run32+0x87/0x170 [ 113.296971][ T8809] __bpf_prog_run32+0x87/0x170 [ 113.301701][ T8809] ===================================================== [ 113.308620][ T8809] Disabling lock debugging due to kernel taint [ 113.314745][ T8809] Kernel panic - not syncing: panic_on_warn set ... [ 113.321307][ T8809] CPU: 1 PID: 8809 Comm: syz-executor988 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 113.331337][ T8809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.341380][ T8809] Call Trace: [ 113.344650][ T8809] dump_stack+0x1c9/0x220 [ 113.348955][ T8809] panic+0x3d5/0xc3e [ 113.352837][ T8809] kmsan_report+0x1df/0x1e0 [ 113.357325][ T8809] __msan_warning+0x58/0xa0 [ 113.361805][ T8809] bpf_skb_load_helper_16+0xd9/0x2b0 [ 113.367076][ T8809] ___bpf_prog_run+0x214d/0x97a0 [ 113.371985][ T8809] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.378115][ T8809] ? bpf_skb_load_helper_8_no_cache+0x340/0x340 [ 113.384334][ T8809] __bpf_prog_run32+0x101/0x170 [ 113.389179][ T8809] ? kmsan_get_metadata+0x4f/0x180 [ 113.394267][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.400062][ T8809] ? ___bpf_prog_run+0x97a0/0x97a0 [ 113.405147][ T8809] sk_filter_trim_cap+0x42a/0xcc0 [ 113.410150][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 113.415322][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.421102][ T8809] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.426292][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 113.431470][ T8809] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.437524][ T8809] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.442876][ T8809] ? unix_dgram_peer_wake_me+0x7d0/0x7d0 [ 113.448486][ T8809] kernel_sendmsg+0x433/0x440 [ 113.453142][ T8809] sock_no_sendpage+0x235/0x300 [ 113.457987][ T8809] ? sock_no_mmap+0x30/0x30 [ 113.462466][ T8809] sock_sendpage+0x1e1/0x2c0 [ 113.467040][ T8809] pipe_to_sendpage+0x38c/0x4c0 [ 113.471867][ T8809] ? sock_fasync+0x250/0x250 [ 113.476442][ T8809] __splice_from_pipe+0x539/0xed0 [ 113.481457][ T8809] ? generic_splice_sendpage+0x2d0/0x2d0 [ 113.487072][ T8809] generic_splice_sendpage+0x1d5/0x2d0 [ 113.493564][ T8809] ? iter_file_splice_write+0x17b0/0x17b0 [ 113.499272][ T8809] do_splice+0x1eae/0x2ec0 [ 113.503668][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 113.508842][ T8809] ? kmsan_get_metadata+0x11d/0x180 [ 113.514016][ T8809] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.519818][ T8809] __se_sys_splice+0x426/0x520 [ 113.524563][ T8809] __x64_sys_splice+0x6e/0x90 [ 113.529215][ T8809] do_syscall_64+0xb8/0x160 [ 113.533699][ T8809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.539566][ T8809] RIP: 0033:0x4402b9 [ 113.543483][ T8809] 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 [ 113.563107][ T8809] RSP: 002b:00007fff817199e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 113.571539][ T8809] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 113.579489][ T8809] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 113.587461][ T8809] RBP: 00000000006ca018 R08: 000000000004ffe0 R09: 0000000000000000 [ 113.595406][ T8809] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40 [ 113.603352][ T8809] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 113.612687][ T8809] Kernel Offset: 0x11e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 113.624300][ T8809] Rebooting in 86400 seconds..