IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready ================================================================== BUG: KMSAN: uninit-value in copyout lib/iov_iter.c:140 [inline] BUG: KMSAN: uninit-value in _copy_to_iter+0x46d/0x28f0 lib/iov_iter.c:571 CPU: 1 PID: 5014 Comm: syz-executor6 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 kmsan_internal_check_memory+0x125/0x1d0 mm/kmsan/kmsan.c:1157 kmsan_copy_to_user+0x69/0x160 mm/kmsan/kmsan.c:1199 copyout lib/iov_iter.c:140 [inline] _copy_to_iter+0x46d/0x28f0 lib/iov_iter.c:571 copy_to_iter include/linux/uio.h:106 [inline] memcpy_to_msg include/linux/skbuff.h:3314 [inline] hash_recvmsg+0x88e/0xd50 crypto/algif_hash.c:226 hash_recvmsg_nokey+0x129/0x160 crypto/algif_hash.c:371 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: 0033:0x455259 RSP: 002b:00007f22d8564c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f22d85656d4 RCX: 0000000000455259 RDX: 0000000000000001 RSI: 00000000208bafc0 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000048c R14: 00000000006f9dc0 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:526 __msan_memcpy+0x19f/0x1f0 mm/kmsan/kmsan_instr.c:470 ghash_final+0x168/0x1d0 arch/x86/crypto/ghash-clmulni-intel_glue.c:141 crypto_shash_final+0x198/0x1c0 crypto/shash.c:152 ghash_async_final+0x26d/0x290 arch/x86/crypto/ghash-clmulni-intel_glue.c:211 crypto_ahash_op+0x89a/0xc10 crypto/ahash.c:361 crypto_ahash_final+0x8c/0xb0 crypto/ahash.c:366 hash_recvmsg+0x56d/0xd50 crypto/algif_hash.c:220 hash_recvmsg_nokey+0x129/0x160 crypto/algif_hash.c:371 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:521 ghash_update+0xb74/0x1060 arch/x86/crypto/ghash-clmulni-intel_glue.c:110 crypto_shash_update crypto/shash.c:117 [inline] shash_ahash_update+0x293/0x360 crypto/shash.c:239 ghash_async_update+0x294/0x2b0 arch/x86/crypto/ghash-clmulni-intel_glue.c:193 crypto_ahash_update include/crypto/hash.h:522 [inline] hash_sendpage+0x904/0xe10 crypto/algif_hash.c:173 hash_sendpage_nokey+0x153/0x180 crypto/algif_hash.c:359 kernel_sendpage net/socket.c:3234 [inline] sock_sendpage+0x1de/0x2c0 net/socket.c:855 pipe_to_sendpage+0x31b/0x430 fs/splice.c:451 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x49a/0xf30 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] generic_splice_sendpage+0x1c6/0x2a0 fs/splice.c:832 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x19b/0x200 fs/splice.c:1018 splice_direct_to_actor+0x764/0x1040 fs/splice.c:973 do_splice_direct+0x335/0x540 fs/splice.c:1061 do_sendfile+0x1067/0x1e40 fs/read_write.c:1413 SYSC_sendfile64+0x1b3/0x300 fs/read_write.c:1468 SyS_sendfile64+0x64/0x90 fs/read_write.c:1460 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:814 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:868 __alloc_pages_nodemask+0xf5b/0x5dc0 mm/page_alloc.c:4283 alloc_pages_vma+0xcc8/0x1800 mm/mempolicy.c:2019 shmem_alloc_page mm/shmem.c:1471 [inline] shmem_alloc_and_acct_page+0x6d5/0x1000 mm/shmem.c:1496 shmem_getpage_gfp+0x35db/0x5770 mm/shmem.c:1771 shmem_getpage mm/shmem.c:131 [inline] shmem_fallocate+0xde2/0x1610 mm/shmem.c:2939 vfs_fallocate+0x9dc/0xde0 fs/open.c:319 SYSC_fallocate+0x119/0x1d0 fs/open.c:342 SyS_fallocate+0x64/0x90 fs/open.c:336 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Byte 0 of 16 is uninitialized ==================================================================