Re: UBSAN: object-size-mismatch in wg_xmit
From: Jeffrey Walton <hidden>
Date: 2021-01-11 17:36:44
On Mon, Jan 11, 2021 at 12:20 PM Dmitry Vyukov [off-list ref] wrote:
... FTR, I've disabled the following UBSAN configs: UBSAN_MISC UBSAN_DIV_ZERO UBSAN_BOOL UBSAN_OBJECT_SIZE UBSAN_SIGNED_OVERFLOW UBSAN_UNSIGNED_OVERFLOW UBSAN_ENUM UBSAN_ALIGNMENT UBSAN_UNREACHABLE Only these are enabled now: UBSAN_BOUNDS UBSAN_SHIFT This is commit: https://github.com/google/syzkaller/commit/2c1f2513486f21d26b1942ce77ffc782677fbf4e
I think the commit cut too deep. The overflows are important if folks are building with compilers other than GCC. The aligned data accesses are important on platforms like MIPS64 and Sparc64. Object size is important because it catches destination buffer overflows. I don't know what's in miscellaneous. There may be something useful in there. Jeff