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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.761581] ================================================================== [ 36.768977] BUG: KMSAN: uninit-value in gf128mul_4k_lle+0x226/0x320 [ 36.775369] CPU: 0 PID: 3571 Comm: syzkaller021670 Not tainted 4.16.0+ #83 [ 36.782488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.792084] Call Trace: [ 36.794856] dump_stack+0x185/0x1d0 [ 36.798651] ? gf128mul_4k_lle+0x226/0x320 [ 36.802869] kmsan_report+0x142/0x240 [ 36.806648] __msan_warning_32+0x6c/0xb0 [ 36.810688] gf128mul_4k_lle+0x226/0x320 [ 36.814732] ghash_final+0x10a/0x1f0 [ 36.818560] ? ghash_update+0x1160/0x1160 [ 36.822689] shash_finup_unaligned+0x3a8/0x3f0 [ 36.827250] ? crypto_shash_finup+0x520/0x520 [ 36.831889] shash_ahash_finup+0x468/0xa30 [ 36.836139] shash_ahash_digest+0x5c6/0x600 [ 36.840446] shash_async_digest+0x11c/0x1b0 [ 36.844750] crypto_ahash_op+0x89a/0xc10 [ 36.848795] ? __kmalloc+0x23c/0x350 [ 36.852489] ? shash_async_finup+0x1b0/0x1b0 [ 36.856877] ? shash_async_finup+0x1b0/0x1b0 [ 36.861266] crypto_ahash_digest+0xe4/0x160 [ 36.865570] hash_sendpage+0xb40/0xe10 [ 36.869435] hash_sendpage_nokey+0x153/0x180 [ 36.873821] ? hash_recvmsg_nokey+0x160/0x160 [ 36.878298] sock_sendpage+0x1de/0x2c0 [ 36.882167] pipe_to_sendpage+0x31b/0x430 [ 36.886295] ? sock_fasync+0x2b0/0x2b0 [ 36.890169] ? propagate_umount+0x3a30/0x3a30 [ 36.894642] __splice_from_pipe+0x49a/0xf30 [ 36.898944] ? generic_splice_sendpage+0x2a0/0x2a0 [ 36.903854] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 36.909199] generic_splice_sendpage+0x1c6/0x2a0 [ 36.913941] ? iter_file_splice_write+0x1710/0x1710 [ 36.918936] ? iter_file_splice_write+0x1710/0x1710 [ 36.923930] direct_splice_actor+0x19b/0x200 [ 36.928325] splice_direct_to_actor+0x764/0x1040 [ 36.933070] ? do_splice_direct+0x540/0x540 [ 36.937386] ? security_file_permission+0x28f/0x4b0 [ 36.942414] ? rw_verify_area+0x35e/0x580 [ 36.946554] do_splice_direct+0x335/0x540 [ 36.950681] do_sendfile+0x1067/0x1e40 [ 36.954555] SYSC_sendfile64+0x1b3/0x300 [ 36.958594] SyS_sendfile64+0x64/0x90 [ 36.962377] do_syscall_64+0x309/0x430 [ 36.966253] ? SYSC_sendfile+0x320/0x320 [ 36.970388] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 36.975554] RIP: 0033:0x440c69 [ 36.978721] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 36.986412] RAX: ffffffffffffffda RBX: 00007fff1c0eaa40 RCX: 0000000000440c69 [ 36.993660] RDX: 0000000020e64ff8 RSI: 0000000000000005 RDI: 0000000000000004 [ 37.000909] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 37.008155] R10: 0000000000000008 R11: 0000000000000217 R12: 0000000000402400 [ 37.015401] R13: 0000000000402490 R14: 0000000000000000 R15: 0000000000000000 [ 37.022654] [ 37.024262] Uninit was stored to memory at: [ 37.028567] kmsan_internal_chain_origin+0x12b/0x210 [ 37.033652] __msan_chain_origin+0x69/0xc0 [ 37.037865] ghash_update+0x10c5/0x1160 [ 37.041818] shash_finup_unaligned+0x202/0x3f0 [ 37.046378] shash_ahash_finup+0x468/0xa30 [ 37.050590] shash_ahash_digest+0x5c6/0x600 [ 37.054898] shash_async_digest+0x11c/0x1b0 [ 37.059196] crypto_ahash_op+0x89a/0xc10 [ 37.063242] crypto_ahash_digest+0xe4/0x160 [ 37.067546] hash_sendpage+0xb40/0xe10 [ 37.071413] hash_sendpage_nokey+0x153/0x180 [ 37.075814] sock_sendpage+0x1de/0x2c0 [ 37.079691] pipe_to_sendpage+0x31b/0x430 [ 37.083820] __splice_from_pipe+0x49a/0xf30 [ 37.088125] generic_splice_sendpage+0x1c6/0x2a0 [ 37.092857] direct_splice_actor+0x19b/0x200 [ 37.097252] splice_direct_to_actor+0x764/0x1040 [ 37.101985] do_splice_direct+0x335/0x540 [ 37.106116] do_sendfile+0x1067/0x1e40 [ 37.109984] SYSC_sendfile64+0x1b3/0x300 [ 37.114026] SyS_sendfile64+0x64/0x90 [ 37.117807] do_syscall_64+0x309/0x430 [ 37.121677] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 37.126927] Uninit was created at: [ 37.130454] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 37.135456] kmsan_alloc_page+0x82/0xe0 [ 37.139407] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 37.144138] alloc_pages_vma+0xcc8/0x1800 [ 37.149661] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 37.154652] shmem_getpage_gfp+0x35db/0x5770 [ 37.159038] shmem_fallocate+0xde2/0x1610 [ 37.163166] vfs_fallocate+0x9dc/0xde0 [ 37.167037] SYSC_fallocate+0x119/0x1d0 [ 37.170995] SyS_fallocate+0x64/0x90 [ 37.174687] do_syscall_64+0x309/0x430 [ 37.178554] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 37.183714] ================================================================== [ 37.191044] Disabling lock debugging due to kernel taint [ 37.196470] Kernel panic - not syncing: panic_on_warn set ... [ 37.196470] [ 37.203895] CPU: 0 PID: 3571 Comm: syzkaller021670 Tainted: G B 4.16.0+ #83 [ 37.212184] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.221514] Call Trace: [ 37.224086] dump_stack+0x185/0x1d0 [ 37.227689] panic+0x39d/0x940 [ 37.230865] ? gf128mul_4k_lle+0x226/0x320 [ 37.235083] kmsan_report+0x238/0x240 [ 37.238866] __msan_warning_32+0x6c/0xb0 [ 37.242908] gf128mul_4k_lle+0x226/0x320 [ 37.246947] ghash_final+0x10a/0x1f0 [ 37.250644] ? ghash_update+0x1160/0x1160 [ 37.254768] shash_finup_unaligned+0x3a8/0x3f0 [ 37.259325] ? crypto_shash_finup+0x520/0x520 [ 37.263806] shash_ahash_finup+0x468/0xa30 [ 37.268019] shash_ahash_digest+0x5c6/0x600 [ 37.272320] shash_async_digest+0x11c/0x1b0 [ 37.276706] crypto_ahash_op+0x89a/0xc10 [ 37.280742] ? __kmalloc+0x23c/0x350 [ 37.284434] ? shash_async_finup+0x1b0/0x1b0 [ 37.288818] ? shash_async_finup+0x1b0/0x1b0 [ 37.293714] crypto_ahash_digest+0xe4/0x160 [ 37.298014] hash_sendpage+0xb40/0xe10 [ 37.301880] hash_sendpage_nokey+0x153/0x180 [ 37.306265] ? hash_recvmsg_nokey+0x160/0x160 [ 37.310744] sock_sendpage+0x1de/0x2c0 [ 37.314610] pipe_to_sendpage+0x31b/0x430 [ 37.318734] ? sock_fasync+0x2b0/0x2b0 [ 37.322598] ? propagate_umount+0x3a30/0x3a30 [ 37.327068] __splice_from_pipe+0x49a/0xf30 [ 37.331366] ? generic_splice_sendpage+0x2a0/0x2a0 [ 37.336274] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 37.341612] generic_splice_sendpage+0x1c6/0x2a0 [ 37.346347] ? iter_file_splice_write+0x1710/0x1710 [ 37.351340] ? iter_file_splice_write+0x1710/0x1710 [ 37.356334] direct_splice_actor+0x19b/0x200 [ 37.360721] splice_direct_to_actor+0x764/0x1040 [ 37.365451] ? do_splice_direct+0x540/0x540 [ 37.369761] ? security_file_permission+0x28f/0x4b0 [ 37.374763] ? rw_verify_area+0x35e/0x580 [ 37.378889] do_splice_direct+0x335/0x540 [ 37.383015] do_sendfile+0x1067/0x1e40 [ 37.386884] SYSC_sendfile64+0x1b3/0x300 [ 37.390921] SyS_sendfile64+0x64/0x90 [ 37.394706] do_syscall_64+0x309/0x430 [ 37.398660] ? SYSC_sendfile+0x320/0x320 [ 37.402699] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 37.407863] RIP: 0033:0x440c69 [ 37.411028] RSP: 002b:00000000007dff78 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 37.418799] RAX: ffffffffffffffda RBX: 00007fff1c0eaa40 RCX: 0000000000440c69 [ 37.426054] RDX: 0000000020e64ff8 RSI: 0000000000000005 RDI: 0000000000000004 [ 37.433308] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 37.440553] R10: 0000000000000008 R11: 0000000000000217 R12: 0000000000402400 [ 37.447799] R13: 0000000000402490 R14: 0000000000000000 R15: 0000000000000000 [ 37.455481] Dumping ftrace buffer: [ 37.458993] (ftrace buffer empty) [ 37.462677] Kernel Offset: disabled [ 37.466282] Rebooting in 86400 seconds..