INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.502342] ================================================================== [ 40.509736] BUG: KMSAN: uninit-value in sha_transform+0x58ec/0x6320 [ 40.516129] CPU: 1 PID: 3577 Comm: syzkaller197153 Not tainted 4.16.0+ #83 [ 40.523114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.532447] Call Trace: [ 40.535017] dump_stack+0x185/0x1d0 [ 40.538620] ? sha_transform+0x58ec/0x6320 [ 40.542831] kmsan_report+0x142/0x240 [ 40.546608] __msan_warning_32+0x6c/0xb0 [ 40.550644] sha_transform+0x58ec/0x6320 [ 40.554681] ? kmsan_set_origin_inline+0x6b/0x120 [ 40.559497] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 40.564924] ? __msan_poison_alloca+0x15c/0x1d0 [ 40.569567] ? shash_async_update+0x290/0x360 [ 40.574057] crypto_sha1_update+0x4cb/0x5b0 [ 40.578375] ? crypto_hash_walk_first+0x210/0x380 [ 40.583194] ? shash_async_update+0x225/0x360 [ 40.587668] ? rmd320_transform+0x7f10/0x7f10 [ 40.592139] shash_async_update+0x290/0x360 [ 40.596441] ? shash_async_init+0x270/0x270 [ 40.600740] hash_sendpage+0x904/0xe10 [ 40.604604] ? hash_recvmsg+0xd50/0xd50 [ 40.608557] sock_sendpage+0x1de/0x2c0 [ 40.612424] pipe_to_sendpage+0x31b/0x430 [ 40.616548] ? sock_fasync+0x2b0/0x2b0 [ 40.620415] ? propagate_umount+0x3a30/0x3a30 [ 40.624886] __splice_from_pipe+0x49a/0xf30 [ 40.629184] ? generic_splice_sendpage+0x2a0/0x2a0 [ 40.634092] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 40.639433] generic_splice_sendpage+0x1c6/0x2a0 [ 40.644168] ? iter_file_splice_write+0x1710/0x1710 [ 40.649159] ? iter_file_splice_write+0x1710/0x1710 [ 40.654161] direct_splice_actor+0x19b/0x200 [ 40.658563] splice_direct_to_actor+0x764/0x1040 [ 40.663296] ? do_splice_direct+0x540/0x540 [ 40.667593] ? security_file_permission+0x28f/0x4b0 [ 40.672588] ? rw_verify_area+0x35e/0x580 [ 40.676718] do_splice_direct+0x335/0x540 [ 40.680846] do_sendfile+0x1067/0x1e40 [ 40.684719] SYSC_sendfile64+0x1b3/0x300 [ 40.688765] SyS_sendfile64+0x64/0x90 [ 40.692553] do_syscall_64+0x309/0x430 [ 40.696428] ? SYSC_sendfile+0x320/0x320 [ 40.700470] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.705633] RIP: 0033:0x440c19 [ 40.708809] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 40.716815] RAX: ffffffffffffffda RBX: 00007ffe133342a0 RCX: 0000000000440c19 [ 40.724149] RDX: 0000000020e64ff8 RSI: 0000000000000005 RDI: 0000000000000004 [ 40.731499] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 40.738751] R10: 0000000000008e18 R11: 0000000000000217 R12: 00000000004023b0 [ 40.746008] R13: 0000000000402440 R14: 0000000000000000 R15: 0000000000000000 [ 40.753258] [ 40.755034] Uninit was created at: [ 40.758554] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 40.763543] kmsan_alloc_page+0x82/0xe0 [ 40.767494] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 40.772222] alloc_pages_vma+0xcc8/0x1800 [ 40.776345] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 40.781345] shmem_getpage_gfp+0x35db/0x5770 [ 40.785730] shmem_fallocate+0xde2/0x1610 [ 40.789852] vfs_fallocate+0x9dc/0xde0 [ 40.793715] SYSC_fallocate+0x119/0x1d0 [ 40.797665] SyS_fallocate+0x64/0x90 [ 40.801352] do_syscall_64+0x309/0x430 [ 40.805216] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.810376] ================================================================== [ 40.817705] Disabling lock debugging due to kernel taint [ 40.823131] Kernel panic - not syncing: panic_on_warn set ... [ 40.823131] [ 40.830476] CPU: 1 PID: 3577 Comm: syzkaller197153 Tainted: G B 4.16.0+ #83 [ 40.838771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.848102] Call Trace: [ 40.850670] dump_stack+0x185/0x1d0 [ 40.854284] panic+0x39d/0x940 [ 40.857465] ? sha_transform+0x58ec/0x6320 [ 40.861676] kmsan_report+0x238/0x240 [ 40.865454] __msan_warning_32+0x6c/0xb0 [ 40.869491] sha_transform+0x58ec/0x6320 [ 40.873529] ? kmsan_set_origin_inline+0x6b/0x120 [ 40.878352] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 40.883781] ? __msan_poison_alloca+0x15c/0x1d0 [ 40.888426] ? shash_async_update+0x290/0x360 [ 40.892900] crypto_sha1_update+0x4cb/0x5b0 [ 40.897222] ? crypto_hash_walk_first+0x210/0x380 [ 40.902065] ? shash_async_update+0x225/0x360 [ 40.906552] ? rmd320_transform+0x7f10/0x7f10 [ 40.911025] shash_async_update+0x290/0x360 [ 40.915325] ? shash_async_init+0x270/0x270 [ 40.919620] hash_sendpage+0x904/0xe10 [ 40.923486] ? hash_recvmsg+0xd50/0xd50 [ 40.927440] sock_sendpage+0x1de/0x2c0 [ 40.931307] pipe_to_sendpage+0x31b/0x430 [ 40.935429] ? sock_fasync+0x2b0/0x2b0 [ 40.939294] ? propagate_umount+0x3a30/0x3a30 [ 40.943765] __splice_from_pipe+0x49a/0xf30 [ 40.948064] ? generic_splice_sendpage+0x2a0/0x2a0 [ 40.952972] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 40.958316] generic_splice_sendpage+0x1c6/0x2a0 [ 40.963051] ? iter_file_splice_write+0x1710/0x1710 [ 40.968043] ? iter_file_splice_write+0x1710/0x1710 [ 40.973035] direct_splice_actor+0x19b/0x200 [ 40.977424] splice_direct_to_actor+0x764/0x1040 [ 40.982162] ? do_splice_direct+0x540/0x540 [ 40.986464] ? security_file_permission+0x28f/0x4b0 [ 40.991460] ? rw_verify_area+0x35e/0x580 [ 40.995587] do_splice_direct+0x335/0x540 [ 40.999731] do_sendfile+0x1067/0x1e40 [ 41.003634] SYSC_sendfile64+0x1b3/0x300 [ 41.007677] SyS_sendfile64+0x64/0x90 [ 41.011455] do_syscall_64+0x309/0x430 [ 41.015321] ? SYSC_sendfile+0x320/0x320 [ 41.019361] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.024527] RIP: 0033:0x440c19 [ 41.027694] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 41.035378] RAX: ffffffffffffffda RBX: 00007ffe133342a0 RCX: 0000000000440c19 [ 41.042623] RDX: 0000000020e64ff8 RSI: 0000000000000005 RDI: 0000000000000004 [ 41.049870] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 41.057115] R10: 0000000000008e18 R11: 0000000000000217 R12: 00000000004023b0 [ 41.064362] R13: 0000000000402440 R14: 0000000000000000 R15: 0000000000000000 [ 41.071979] Dumping ftrace buffer: [ 41.075498] (ftrace buffer empty) [ 41.079186] Kernel Offset: disabled [ 41.082788] Rebooting in 86400 seconds..