[ 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 '10.128.15.204' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 147.058804][ T8468] ===================================================== [ 147.065894][ T8468] BUG: KMSAN: uninit-value in crc_t10dif_generic+0x151/0x1b0 [ 147.073257][ T8468] CPU: 0 PID: 8468 Comm: syz-executor821 Not tainted 5.8.0-rc5-syzkaller #0 [ 147.081915][ T8468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.092500][ T8468] Call Trace: [ 147.095832][ T8468] dump_stack+0x1df/0x240 [ 147.100161][ T8468] kmsan_report+0xf7/0x1e0 [ 147.104581][ T8468] __msan_warning+0x58/0xa0 [ 147.109087][ T8468] crc_t10dif_generic+0x151/0x1b0 [ 147.114127][ T8468] chksum_update+0xb4/0x130 [ 147.118990][ T8468] ? chksum_init+0x70/0x70 [ 147.123776][ T8468] crypto_shash_update+0x4e9/0x550 [ 147.128899][ T8468] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 147.135078][ T8468] ? crypto_hash_walk_first+0x1fd/0x360 [ 147.140713][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.145820][ T8468] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 147.151707][ T8468] shash_async_update+0x113/0x1d0 [ 147.156752][ T8468] ? shash_async_init+0x1e0/0x1e0 [ 147.161804][ T8468] hash_sendpage+0x8ef/0xdf0 [ 147.166846][ T8468] ? hash_recvmsg+0xd30/0xd30 [ 147.171631][ T8468] sock_sendpage+0x1e1/0x2c0 [ 147.176239][ T8468] pipe_to_sendpage+0x38c/0x4c0 [ 147.181084][ T8468] ? sock_fasync+0x250/0x250 [ 147.185696][ T8468] __splice_from_pipe+0x565/0xf00 [ 147.191175][ T8468] ? generic_splice_sendpage+0x2d0/0x2d0 [ 147.196898][ T8468] generic_splice_sendpage+0x1d5/0x2d0 [ 147.202362][ T8468] ? iter_file_splice_write+0x1800/0x1800 [ 147.208083][ T8468] direct_splice_actor+0x1fd/0x580 [ 147.213209][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.218323][ T8468] splice_direct_to_actor+0x6b2/0xf50 [ 147.223721][ T8468] ? do_splice_direct+0x580/0x580 [ 147.228777][ T8468] do_splice_direct+0x342/0x580 [ 147.233788][ T8468] do_sendfile+0x101b/0x1d40 [ 147.238420][ T8468] __se_sys_sendfile64+0x2bb/0x360 [ 147.243535][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.248651][ T8468] __x64_sys_sendfile64+0x56/0x70 [ 147.253779][ T8468] do_syscall_64+0xb0/0x150 [ 147.258272][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.264163][ T8468] RIP: 0033:0x4403d9 [ 147.268473][ T8468] Code: Bad RIP value. [ 147.272520][ T8468] RSP: 002b:00007ffc4de488d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 147.280926][ T8468] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 [ 147.288888][ T8468] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 [ 147.296863][ T8468] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 147.304828][ T8468] R10: 000000000000073c R11: 0000000000000246 R12: 0000000000401c40 [ 147.312819][ T8468] R13: 0000000000401cd0 R14: 0000000000000000 R15: 0000000000000000 [ 147.320931][ T8468] [ 147.323243][ T8468] Uninit was created at: [ 147.327489][ T8468] kmsan_save_stack_with_flags+0x3c/0x90 [ 147.333118][ T8468] kmsan_alloc_page+0xb9/0x180 [ 147.337881][ T8468] __alloc_pages_nodemask+0x56a2/0x5dc0 [ 147.343411][ T8468] alloc_pages_current+0x672/0x990 [ 147.348517][ T8468] push_pipe+0x605/0xb70 [ 147.352755][ T8468] iov_iter_get_pages_alloc+0x18a9/0x21c0 [ 147.358472][ T8468] do_splice_to+0x4fc/0x14f0 [ 147.363048][ T8468] splice_direct_to_actor+0x45c/0xf50 [ 147.368406][ T8468] do_splice_direct+0x342/0x580 [ 147.373247][ T8468] do_sendfile+0x101b/0x1d40 [ 147.377822][ T8468] __se_sys_sendfile64+0x2bb/0x360 [ 147.382911][ T8468] __x64_sys_sendfile64+0x56/0x70 [ 147.387941][ T8468] do_syscall_64+0xb0/0x150 [ 147.392432][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.398300][ T8468] ===================================================== [ 147.405213][ T8468] Disabling lock debugging due to kernel taint [ 147.411352][ T8468] Kernel panic - not syncing: panic_on_warn set ... [ 147.417940][ T8468] CPU: 0 PID: 8468 Comm: syz-executor821 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 147.432766][ T8468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 147.442933][ T8468] Call Trace: [ 147.446222][ T8468] dump_stack+0x1df/0x240 [ 147.450551][ T8468] panic+0x3d5/0xc3e [ 147.454467][ T8468] kmsan_report+0x1df/0x1e0 [ 147.459007][ T8468] __msan_warning+0x58/0xa0 [ 147.463612][ T8468] crc_t10dif_generic+0x151/0x1b0 [ 147.468646][ T8468] chksum_update+0xb4/0x130 [ 147.474113][ T8468] ? chksum_init+0x70/0x70 [ 147.478531][ T8468] crypto_shash_update+0x4e9/0x550 [ 147.483661][ T8468] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 147.490165][ T8468] ? crypto_hash_walk_first+0x1fd/0x360 [ 147.495734][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.500848][ T8468] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 147.506647][ T8468] shash_async_update+0x113/0x1d0 [ 147.511682][ T8468] ? shash_async_init+0x1e0/0x1e0 [ 147.516712][ T8468] hash_sendpage+0x8ef/0xdf0 [ 147.521317][ T8468] ? hash_recvmsg+0xd30/0xd30 [ 147.525984][ T8468] sock_sendpage+0x1e1/0x2c0 [ 147.530580][ T8468] pipe_to_sendpage+0x38c/0x4c0 [ 147.535533][ T8468] ? sock_fasync+0x250/0x250 [ 147.540128][ T8468] __splice_from_pipe+0x565/0xf00 [ 147.545155][ T8468] ? generic_splice_sendpage+0x2d0/0x2d0 [ 147.550813][ T8468] generic_splice_sendpage+0x1d5/0x2d0 [ 147.556454][ T8468] ? iter_file_splice_write+0x1800/0x1800 [ 147.562172][ T8468] direct_splice_actor+0x1fd/0x580 [ 147.567283][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.572391][ T8468] splice_direct_to_actor+0x6b2/0xf50 [ 147.578553][ T8468] ? do_splice_direct+0x580/0x580 [ 147.583598][ T8468] do_splice_direct+0x342/0x580 [ 147.588463][ T8468] do_sendfile+0x101b/0x1d40 [ 147.593096][ T8468] __se_sys_sendfile64+0x2bb/0x360 [ 147.598208][ T8468] ? kmsan_get_metadata+0x4f/0x180 [ 147.603340][ T8468] __x64_sys_sendfile64+0x56/0x70 [ 147.608384][ T8468] do_syscall_64+0xb0/0x150 [ 147.613256][ T8468] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 147.619154][ T8468] RIP: 0033:0x4403d9 [ 147.623026][ T8468] Code: Bad RIP value. [ 147.627071][ T8468] RSP: 002b:00007ffc4de488d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 147.635464][ T8468] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 [ 147.643628][ T8468] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 [ 147.651763][ T8468] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 147.659813][ T8468] R10: 000000000000073c R11: 0000000000000246 R12: 0000000000401c40 [ 147.667775][ T8468] R13: 0000000000401cd0 R14: 0000000000000000 R15: 0000000000000000 [ 147.676820][ T8468] Kernel Offset: 0x2a000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 147.688636][ T8468] Rebooting in 86400 seconds..