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BUG: KMSAN: uninit-value in gcmaes_decrypt+0x2ec/0xea0 arch/x86/crypto/aesni-intel_glue.c:827
CPU: 0 PID: 5190 Comm: syz-executor2 Not tainted 4.16.0+ #81
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
 gcmaes_decrypt+0x2ec/0xea0 arch/x86/crypto/aesni-intel_glue.c:827
 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+0x1d0/0x230 net/socket.c:810
 ___sys_recvmsg+0x3fb/0x810 net/socket.c:2205
 __sys_recvmmsg+0x54e/0xdb0 net/socket.c:2313
 SYSC_recvmmsg+0x29b/0x3e0 net/socket.c:2394
 SyS_recvmmsg+0x76/0xa0 net/socket.c:2378
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455259
RSP: 002b:00007faac9d06c68 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007faac9d076d4 RCX: 0000000000455259
RDX: 0000000000000001 RSI: 00000000200004c0 RDI: 0000000000000016
RBP: 000000000072bea0 R08: 0000000020002d40 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000495 R14: 00000000006f9e98 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314
 __kmalloc+0x23c/0x350 mm/slub.c:3791
 kmalloc include/linux/slab.h:517 [inline]
 sock_kmalloc+0x14e/0x270 net/core/sock.c:1986
 af_alg_alloc_areq+0x85/0x320 crypto/af_alg.c:1098
 _aead_recvmsg crypto/algif_aead.c:157 [inline]
 aead_recvmsg+0x65a/0x2960 crypto/algif_aead.c:334
 sock_recvmsg_nosec net/socket.c:803 [inline]
 sock_recvmsg+0x1d0/0x230 net/socket.c:810
 ___sys_recvmsg+0x3fb/0x810 net/socket.c:2205
 __sys_recvmmsg+0x54e/0xdb0 net/socket.c:2313
 SYSC_recvmmsg+0x29b/0x3e0 net/socket.c:2394
 SyS_recvmmsg+0x76/0xa0 net/socket.c:2378
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
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