Ollama / Ollama

Ollama SIGSEGV Crash on Valid WebP Image with minicpm-v:8b

Fix Ollama crashing with SIGSEGV when processing valid WebP images with minicpm-v vision model Includes evidence for Ollama troubleshooting demand.

Source-backed Last updated May 15, 2026 1 source Needs local verification

Category: Ollama
Error signature: SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes
Quick fix: Compare the failing environment with a known working setup, then change one configuration value at a time.
Updated: May 15, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Ollama, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes is a Ollama failure pattern reported for developers trying to fix ollama crashing with sigsegv when processing valid webp images with minicpm-v vision model. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Filed 2026-05-14. Deterministic crash on specific WebP files with minicpm-v:8b. Crash in mtmd_helper_bitmap_init_from_buf C function. llama3.2-vision handles same image fine. Ollama 0.23.3 on macOS M4.

Common causes

Ollama crashes with segmentation fault when minicpm-v:8b receives a valid WebP image. The crash is in the multimodal tokenization C code. Other vision models (llama3.2-vision) handle the same image fine. Users see 'model runner has unexpectedly stopped' with no actionable guidance.
Filed 2026-05-14. Deterministic crash on specific WebP files with minicpm-v:8b. Crash in mtmd_helper_bitmap_init_from_buf C function. llama3.2-vision handles same image fine. Ollama 0.23.3 on macOS M4.

Quick fixes

Confirm the exact error signature matches SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes.
Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes exactly before applying the quick fix.
Compare the failing environment with Ollama versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes mean in Ollama?

SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes indicates the workflow described by "Ollama SIGSEGV Crash on Valid WebP Image with minicpm-v:8b" failed in a Ollama context. Start by confirming the exact signature and the component that emitted it.

What should I check first for SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes?

Check whether this cause matches your environment: Ollama crashes with segmentation fault when minicpm-v:8b receives a valid WebP image. The crash is in the multimodal tokenization C code. Other vision models (llama3.2-vision) handle the same image fine. Users see 'model runner has unexpectedly stopped' with no actionable guidance.

Is the SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes guidance source-backed?

The "Ollama SIGSEGV Crash on Valid WebP Image with minicpm-v:8b" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes?

For "Ollama SIGSEGV Crash on Valid WebP Image with minicpm-v:8b", avoid applying "Compare the failing environment with a known working setup, then change one configuration value at a time." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging SIGSEGV: segmentation violation mtmd_helper_bitmap_init_from_buf: failed to decode image bytes?

For "Ollama SIGSEGV Crash on Valid WebP Image with minicpm-v:8b", collect the failing Ollama command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.