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BUG: KMSAN: uninit-value in xas_start lib/xarray.c:190 [inline]
BUG: KMSAN: uninit-value in xas_load lib/xarray.c:233 [inline]
BUG: KMSAN: uninit-value in xa_load+0xa59/0xa90 lib/xarray.c:1305
CPU: 0 PID: 13113 Comm: syz-executor.5 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
 xas_start lib/xarray.c:190 [inline]
 xas_load lib/xarray.c:233 [inline]
 xa_load+0xa59/0xa90 lib/xarray.c:1305
 _ucma_find_context drivers/infiniband/core/ucma.c:139 [inline]
 ucma_get_ctx+0x82/0x3b0 drivers/infiniband/core/ucma.c:152
 ucma_get_ctx_dev drivers/infiniband/core/ucma.c:175 [inline]
 ucma_accept+0x29a/0xe40 drivers/infiniband/core/ucma.c:1148
 ucma_write+0x64d/0x6e0 drivers/infiniband/core/ucma.c:1764
 vfs_write+0x6a3/0x17c0 fs/read_write.c:576
 ksys_write+0x275/0x500 fs/read_write.c:631
 __do_sys_write fs/read_write.c:643 [inline]
 __se_sys_write+0x92/0xb0 fs/read_write.c:640
 __x64_sys_write+0x4a/0x70 fs/read_write.c:640
 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:00007f6fb349bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000038180 RCX: 000000000045d5b9
RDX: 0000000000000128 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007f6fb349c9c0 R15: 000000000118cf4c

Local variable ----cmd@ucma_accept created at:
 ucma_accept+0x91/0xe40 drivers/infiniband/core/ucma.c:1137
 ucma_accept+0x91/0xe40 drivers/infiniband/core/ucma.c:1137
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