================================================================== BUG: KMSAN: uninit-value in __crypto_memneq_16 crypto/memneq.c:99 [inline] BUG: KMSAN: uninit-value in __crypto_memneq+0x2f9/0x490 crypto/memneq.c:161 CPU: 1 PID: 5594 Comm: syz-executor5 Not tainted 4.16.0+ #83 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 __crypto_memneq_16 crypto/memneq.c:99 [inline] __crypto_memneq+0x2f9/0x490 crypto/memneq.c:161 crypto_memneq include/crypto/algapi.h:410 [inline] gcmaes_decrypt+0x8d5/0xea0 arch/x86/crypto/aesni-intel_glue.c:858 generic_gcmaes_decrypt+0x181/0x1e0 arch/x86/crypto/aesni-intel_glue.c:1127 crypto_aead_decrypt include/crypto/aead.h:370 [inline] gcmaes_wrapper_decrypt+0x2f5/0x340 arch/x86/crypto/aesni-intel_glue.c:961 _aead_recvmsg include/crypto/aead.h:370 [inline] aead_recvmsg+0x25b5/0x2960 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:803 [inline] sock_recvmsg net/socket.c:810 [inline] sock_read_iter+0x405/0x480 net/socket.c:887 do_iter_readv_writev+0x7bb/0x970 include/linux/fs.h:1776 do_iter_read+0x303/0xd70 fs/read_write.c:895 vfs_readv fs/read_write.c:959 [inline] do_readv+0x295/0x5f0 fs/read_write.c:992 SYSC_readv+0x9b/0xb0 fs/read_write.c:1079 SyS_readv+0x56/0x80 fs/read_write.c:1076 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x455279 RSP: 002b:00007fdcf26f2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007fdcf26f36d4 RCX: 0000000000455279 RDX: 0000000000000001 RSI: 0000000020001180 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000048c R14: 00000000006f9dc0 R15: 0000000000000000 Local variable description: ----authTag@gcmaes_decrypt Variable was created at: gcmaes_decrypt+0xd6/0xea0 arch/x86/crypto/aesni-intel_glue.c:811 generic_gcmaes_decrypt+0x181/0x1e0 arch/x86/crypto/aesni-intel_glue.c:1127 ==================================================================