Not allocated shadow for addr ffff880108200000 (page ffffea000630c000) Attempted to access 4096 bytes ------------[ cut here ]------------ kernel BUG at mm/kmsan/kmsan.c:1378! invalid opcode: 0000 [#1] SMP PTI Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 8587 Comm: syz-executor6 Not tainted 4.17.0+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1377 RSP: 0018:ffff88011145f360 EFLAGS: 00010082 RAX: 000000000000001e RBX: 0000000000000420 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000001453 RDI: 0000000000001454 RBP: ffff88011145f378 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff86575770 R12: ffff880108200000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 R13: 0000000000002000 R14: 0000000000000001 R15: 0000000000001000 FS: 00007f2f4f0e6700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f41b2f9f000 CR3: 00000001143a0000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kmsan_internal_memset_shadow mm/kmsan/kmsan.c:172 [inline] kmsan_internal_unpoison_shadow+0x5c/0xe0 mm/kmsan/kmsan.c:209 kmsan_unpoison_shadow+0x66/0xb0 mm/kmsan/kmsan.c:223 get_user_pages_fast+0x493/0x770 mm/gup.c:1831 iov_iter_get_pages+0x465/0x1810 lib/iov_iter.c:1074 CPU: 0 PID: 8590 Comm: syz-executor3 Not tainted 4.17.0+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 bio_iov_iter_get_pages+0x1c6/0xc70 block/bio.c:891 Call Trace: __blkdev_direct_IO fs/block_dev.c:359 [inline] blkdev_direct_IO+0x1252/0x2d90 fs/block_dev.c:430 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x87b/0xab0 lib/fault-inject.c:149 __should_failslab+0x278/0x2a0 mm/failslab.c:32 should_failslab+0x29/0x70 mm/slab_common.c:1522 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slub.c:2679 [inline] slab_alloc mm/slub.c:2761 [inline] __kmalloc+0xbe/0x350 mm/slub.c:3812 generic_file_read_iter+0x3c6d/0x44d0 mm/filemap.c:2341 blkdev_read_iter+0x20d/0x280 fs/block_dev.c:1930 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] sctp_add_bind_addr+0xb0/0x630 net/sctp/bind_addr.c:159 do_iter_readv_writev+0x81c/0xa20 include/linux/fs.h:1778 sctp_copy_local_addr_list+0x4e1/0x610 net/sctp/protocol.c:180 do_iter_read+0x303/0xd80 fs/read_write.c:922 sctp_copy_one_addr+0x210/0xc40 net/sctp/bind_addr.c:449 vfs_readv fs/read_write.c:986 [inline] do_preadv+0x3a1/0x580 fs/read_write.c:1070 sctp_bind_addr_copy+0x28c/0x970 net/sctp/bind_addr.c:71 sctp_assoc_set_bind_addr_from_ep+0x21b/0x280 net/sctp/associola.c:1606 __do_sys_preadv fs/read_write.c:1120 [inline] __se_sys_preadv fs/read_write.c:1115 [inline] __x64_sys_preadv+0x120/0x170 fs/read_write.c:1115 sctp_sendmsg_new_asoc net/sctp/socket.c:1746 [inline] sctp_sendmsg+0x4764/0x5fc0 net/sctp/socket.c:2095 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455b29 RSP: 002b:00007f2f4f0e5c68 EFLAGS: 00000246 inet_sendmsg+0x3fc/0x760 net/ipv4/af_inet.c:798 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f2f4f0e66d4 RCX: 0000000000455b29 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000015 RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c068f R14: 00000000004cfc40 R15: 0000000000000001 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] __sys_sendto+0x6c4/0x7e0 net/socket.c:1789 Code: 75 29 48 c7 __do_sys_sendto net/socket.c:1801 [inline] __se_sys_sendto net/socket.c:1797 [inline] __x64_sys_sendto+0x1a1/0x210 net/socket.c:1797 c7 59 38 97 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 8a 31 entry_SYSCALL_64_after_hwframe+0x44/0xa9 c0 e8 RIP: 0033:0x455b29 fd 4c RSP: 002b:00007f18faa6ec68 EFLAGS: 00000246 80 ff ORIG_RAX: 000000000000002c 80 3c RAX: ffffffffffffffda RBX: 00007f18faa6f6d4 RCX: 0000000000455b29 25 f8 RDX: 0000000000000001 RSI: 0000000020b31000 RDI: 0000000000000013 93 53 RBP: 000000000072bea0 R08: 0000000020000000 R09: 000000000000001c 8b 00 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 75 11 R13: 00000000004c0eb8 R14: 00000000004d0960 R15: 000000000000000d 48 c7 c7 89 38 97 8a 31 c0 4c 89 fe e8 e2 4c 80 ff <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 a2 fe ff ff 48 8b 1c 25 10 RIP: kmsan_get_shadow_address+0x1ce/0x1f0 mm/kmsan/kmsan.c:1377 RSP: ffff88011145f360 ---[ end trace ad52bb280be1b21f ]---