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b35a0f4dd5
If dst->is_global field is not set, the GRH fields are not cleared
and the following infoleak is reported.
=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x1c9/0x270 lib/usercopy.c:33
instrument_copy_to_user include/linux/instrumented.h:121 [inline]
_copy_to_user+0x1c9/0x270 lib/usercopy.c:33
copy_to_user include/linux/uaccess.h:209 [inline]
ucma_init_qp_attr+0x8c7/0xb10 drivers/infiniband/core/ucma.c:1242
ucma_write+0x637/0x6c0 drivers/infiniband/core/ucma.c:1732
vfs_write+0x8ce/0x2030 fs/read_write.c:588
ksys_write+0x28b/0x510 fs/read_write.c:643
__do_sys_write fs/read_write.c:655 [inline]
__se_sys_write fs/read_write.c:652 [inline]
__ia32_sys_write+0xdb/0x120 fs/read_write.c:652
do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
__do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
Local variable resp created at:
ucma_init_qp_attr+0xa4/0xb10 drivers/infiniband/core/ucma.c:1214
ucma_write+0x637/0x6c0 drivers/infiniband/core/ucma.c:1732
Bytes 40-59 of 144 are uninitialized
Memory access of size 144 starts at ffff888167523b00
Data copied to user address 0000000020000100
CPU: 1 PID: 25910 Comm: syz-executor.1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================
Fixes:
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|---|---|---|
| .. | ||
| core | ||
| hw | ||
| sw | ||
| ulp | ||
| Kconfig | ||
| Makefile | ||