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BUG: KMSAN: uninit-value in ucma_connect+0x458/0xc30 drivers/infiniband/core/ucma.c:1091
CPU: 0 PID: 29463 Comm: syz-executor.4 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 ucma_connect+0x458/0xc30 drivers/infiniband/core/ucma.c:1091
 ucma_write+0x64d/0x6e0 drivers/infiniband/core/ucma.c:1764
 do_loop_readv_writev fs/read_write.c:737 [inline]
 do_iter_write+0x9b1/0x1020 fs/read_write.c:1020
 vfs_writev fs/read_write.c:1091 [inline]
 do_writev+0x4cc/0xa30 fs/read_write.c:1134
 __do_sys_writev fs/read_write.c:1207 [inline]
 __se_sys_writev+0x9b/0xb0 fs/read_write.c:1204
 __x64_sys_writev+0x4a/0x70 fs/read_write.c:1204
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007f588a3b7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000039bc0 RCX: 000000000045d5b9
RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007f588a3b89c0 R15: 000000000118cf4c

Local variable ----cmd@ucma_connect created at:
 ucma_connect+0xde/0xc30 drivers/infiniband/core/ucma.c:1082
 ucma_connect+0xde/0xc30 drivers/infiniband/core/ucma.c:1082
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