diff options
| author | Gaosheng Cui <[email protected]> | 2022-10-31 19:25:36 +0800 |
|---|---|---|
| committer | Paul Moore <[email protected]> | 2022-11-05 01:25:57 -0400 |
| commit | 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 (patch) | |
| tree | a2f8c8a8eb3551df5f87d8d6d17c2adbc419256c /tools/testing/selftests/bpf/prog_tests/prog_array_init.c | |
| parent | 8cf0a1bc12870d148ae830a4ba88cfdf0e879cee (diff) | |
capabilities: fix undefined behavior in bit shift for CAP_TO_MASK
Shifting signed 32-bit value by 31 bits is undefined, so changing
significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2
left shift of 1 by 31 places cannot be represented in type 'int'
Call Trace:
<TASK>
dump_stack_lvl+0x7d/0xa5
dump_stack+0x15/0x1b
ubsan_epilogue+0xe/0x4e
__ubsan_handle_shift_out_of_bounds+0x1e7/0x20c
cap_task_prctl+0x561/0x6f0
security_task_prctl+0x5a/0xb0
__x64_sys_prctl+0x61/0x8f0
do_syscall_64+0x58/0x80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
</TASK>
Fixes: e338d263a76a ("Add 64-bit capability support to the kernel")
Signed-off-by: Gaosheng Cui <[email protected]>
Acked-by: Andrew G. Morgan <[email protected]>
Reviewed-by: Serge Hallyn <[email protected]>
Signed-off-by: Paul Moore <[email protected]>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/prog_array_init.c')
0 files changed, 0 insertions, 0 deletions