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workaround for HIP bug and avoiding a potential same bug on CUDA

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Gabriele Gristina 2025-06-28 22:54:36 +02:00
parent 7fff4c929a
commit c275c35ced
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1 changed files with 14 additions and 0 deletions
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14
src/backend.c
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@ -15948,6 +15948,12 @@ int backend_session_begin (hashcat_ctx_t *hashcat_ctx)
{
u32 threads_per_block_with_regs = (floor) ((float) device_param->regsPerBlock / num_regs);
if (threads_per_block_with_regs == 0)
{
// prevent threads_per_block from resulting in 0 due to a bug on the runtime
threads_per_block_with_regs = threads_per_block;
}
if (threads_per_block_with_regs > device_param->kernel_preferred_wgs_multiple) threads_per_block_with_regs -= threads_per_block_with_regs % device_param->kernel_preferred_wgs_multiple;
threads_per_block = MIN (threads_per_block, threads_per_block_with_regs);
@ -15967,6 +15973,14 @@ int backend_session_begin (hashcat_ctx_t *hashcat_ctx)
{
u32 threads_per_block_with_regs = (floor) ((float) device_param->regsPerBlock / num_regs);
if (threads_per_block_with_regs == 0)
{
// https://rocm.docs.amd.com/projects/HIP/en/docs-develop/doxygen/html/bug.html
// HIP-Clang always returns 0 for regsPerBlock due to a known bug
// prevent threads_per_block from resulting in 0, otherwise hashcat crashes
threads_per_block_with_regs = threads_per_block;
}
if (threads_per_block_with_regs > device_param->kernel_preferred_wgs_multiple) threads_per_block_with_regs -= threads_per_block_with_regs % device_param->kernel_preferred_wgs_multiple;
threads_per_block = MIN (threads_per_block, threads_per_block_with_regs);